Use the table below to answer the questions.
Measured Values for a Stamp's Length
Student 1 Student 2 Student 3
Trial 1 2.60 cm 2.70 cm 2.75 cm
Trial 2 2.72 cm 2.69 cm 2.74 cm
Trial 3 2.65 cm 2.71 cm 2.64 cm
Average 2.66 cm 2.70 cm 2.71 cm
Three students measured the length of a stamp whose accepted length is 2.71 cm. Based on the table, which statement is true?
Multiple choice question.
A)
Student 3 is both precise and accurate.
B)
Student 2 is both precise and accurate.
C)
Student 1 is more accurate than Student 3.
D)
Student 2 is less precise than Student 1.
Answers
Three students measured the length of a stamp whose accepted length is 2.71 cm, on the basis of the table student 2 is both precise and accurate, therefore the correct answer is option B.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
The degree to which a measurement is accurate in relation to its true value. The degree to which the same results are produced by repeated measurements under the same circumstances is known as precision.
Thus, according to the chart, student 2 is both exact and accurate, hence the proper response is option B. Three students measured the length of a stamp, and the approved length is 2.71 cm.
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Related Questions
wich is a better deal, 5 tickets for $12.50 or 8 tickets for $20.16
Answers
5 tickets for $ 12.50
Explanation
to figure out this we need to find the unit rate
so
Step 1
the rate is given by:
\(\text{rate}=\frac{Numbe\text{r of tickets}}{\cos t\text{ of those tickets}}\)then
a) for 5 tickets and $12.50
replace and calculate
\(\begin{gathered} \text{rate}=\frac{Numbe\text{r of tickets}}{\cos t\text{ of those tickets}} \\ \text{rate}=\frac{5\text{ tickets}}{12.5\text{ \$}}=0.4\text{ tickets per dollar} \end{gathered}\)b) for 8 tickets and $20.16
replace and calculate
\(\begin{gathered} \text{rate}=\frac{Numbe\text{r of tickets}}{\cos t\text{ of those tickets}} \\ \text{rate}=\frac{8\text{ tickets}}{20.16\text{ \$}}=0.396\text{ tickets per dollar} \end{gathered}\)therefore, the better deal is 5 tickets for $ 12.50, you will get more tickets per dollar
I hope this helps you
who is better drake or juice world
Answers
Answer:
neither
Explanation:
they both suck :)
Have a great day
Answer:
Both of them
Explanation:
They are both better you can't choose because its like parents choosing who is their favorite child.
Would you rather work in (and maybe manage one day) a retail store, a public corporation, or a mom-and-pop store? Explain your answer by sharing the characteristics of the type of business that influenced your decision.
5 sentences
Answers
if a marble is shot straight upward with a velocity of 67 m/s, when will it reach its maximum height?
Answers
Answer:
229 m
Explanation:
Because the marble is shot straight up, you can use this equation:
(Vy)² = (Voy)² + 2g (y - yo)
Vy (velocity at max height) = 0
Vo = 67 m/s
g = 9.8 m/s²
yo = 0
Now solve for y:
0 = (67 m/s)² - 2(9.8 m/s²)(y - 0)
0 = (4489) - 19.6y
y = 4489/19.6 = 229 m
The Round Up carnival ride below has a radius of 3.62 meters and rotates 0.537 times per second. As shown, riders can be held up by only friction. What coefficient of friction is needed to keep the riders from sliding down? Include units in your answer. Answer must be in 3 significant digits.
Answers
The free body diagram for the problem is shown below:
If the people don't slide down this means that the friction has to be equal to the Weight, then we have:
\(\begin{gathered} F_f-W=0 \\ F_f=W \\ \mu F_n=W \\ \mu=\frac{W}{F_n} \end{gathered}\)Now, from newton's second law we have that:
\(F_n=ma_c\)but
\(a_c=\frac{4\pi^2r}{T^2}\)then:
\(F_n=\frac{4\pi^2mr}{T^2}\)And then we have:
\(\begin{gathered} \mu=\frac{mg}{\frac{4\pi^2mr}{T^2}} \\ \mu=\frac{gT^2}{4\pi^2r} \end{gathered}\)Plugging the values given we have:
\(\begin{gathered} \mu=\frac{(9.8)(\frac{1}{0.537})^2}{4\pi^2(3.62)} \\ \mu=0.238 \end{gathered}\)Therefore the coefficient of friction is 0.238
The __weight_________ of the glass of water on the table is its force.
Answers
Answer: inertia
Explanation:
he glass of water has inertia — it will not move unless a big enough force acts on it. The force in this activity pulling on the glass of water is the friction between the tablecloth and the glass.
The distance between 2 successive crests of a water travelling at 3.6m per second is 0.45m. calculate the frequency of the wave
Answers
Answer:
8 hz
Explanation:
Wave Frequency = \(\frac{velocity}{wavelength}\)
\(F=\frac{3.6}{0.45} = 8\)
Does an electron's electric potential energy increase, decrease, or stay the same as it moves through the wire? If it doesn't stay the same, where does the energy go or come from? a. The electron's potential energy decreases as it moves through the wire. They transfer their potential energy into thermal energy of the wire. b. The electron's potential energy stays the same as it moves through the battery c. The electron's potential energy increases as it moves through the wire. The increase comes at the expense of chemical energy. d. The electron's potential energy increases as it moves through the wire. The increase comes at the expense of thermal energy of the wire. e. The electron's potential energy decreases as it moves through the wire. They transfer their potential energy into chemical energy.
Answers
option (a): "The electron's potential energy decreases as it moves through the wire. They transfer their potential energy into thermal energy of the wire."
define potential energy ?
Potential energy is a type of energy that an object has due to its position or configuration in a physical system. It is the energy that an object possesses due to its location in a gravitational field, its elastic deformation in a spring, or its electric charge in an electric field, among other examples. The term "potential" energy is used because the energy is stored and can be transformed into other forms of energy, such as kinetic energy, when the object is subjected to an external force.
As electrons move through the wire, they experience a decrease in electric potential energy as they move from a higher potential energy location to a lower potential energy location. This decrease in potential energy is due to the work done on the electrons by the electric field. The lost potential energy is converted into thermal energy, which can cause an increase in the temperature of the wire. This thermal energy is what makes the wire feel hot to the touch when current is flowing through it.
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Cumulonimbus clouds often form along cold fronts. Which type of weather is most likely to occur along a cold front?.
Answers
Cumulonimbus clouds often form along cold fronts, so heavy rain and thunderstorm is most likely to occur.
With the rise in the warm air above cold air and its fast condensation afterwards, is often why a lot of heavy rain is produced along a cold front. Also when the warm air keeps on rising in the atmosphere, the condensation process becomes more strong because the temperature drop becomes more significant and thunderstorms and hailstorms become more prominent with cold fronts.
Cumulonimbus clouds are formed due to the rise of the hot air above the cold air, by the means of convection. They also form due to forced convection along cold fronts, where milder air is forced to rise over the incoming cold air. Cumulonimbus clouds can be categorized into following 3 types :
Cumulonimbus calvus - the upper part of the cumulonimbus is puffy,
Cumulonimbus capillatus - the top part of the cloud is fibrous but relatively contained.
Cumulonimbus incus - the upper part of the cloud is fibrous and anvil-shaped.
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a large truck breaks down out on the road and receives a push back into town by a small compact car. while the car, still pushing the truck, is speeding up to get up to cruising speed::
Answers
Ultimately, it's essential to ensure that any vehicle in distress is properly towed or moved in a safe manner by professionals equipped to handle the job.
The scenario described poses significant safety risks to both the small compact car and the large truck. The weight and size disparity between the two vehicles could easily result in a loss of control, causing accidents that could result in serious injury or even fatalities.
It's important to note that attempting to push a stalled vehicle back into town is never a safe solution, and drivers should avoid such actions at all costs. In addition to risking harm to themselves and others on the road, those who choose to push stalled vehicles can face legal consequences.
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How do we increase power? Do we increase or decrease current (amperage)? Do we increase or decrease voltage
Answers
Answer:
Increase the power of a hypothesis test
Use a larger sample. ...
Improve your process. ...
Use a higher significance level (also called alpha or α). ...
Choose a larger value for Differences. ...
Use a directional hypothesis (also called the one-tailed hypothesis).
The two main ways of increasing the current in an electrical circuit are by increasing the voltage or by decreasing the resistance.
Which is the first step in the fusion process?
Answers
Answer:
deuteron
Explanation:
Answer:
C. The Third Picture
Explanation:
EDGE 2021
A glass tube of 30 cm long contains water to a height of 20 cm if 8140 frequency 250hz is used to obtain the next position of resonance after the first when the water level is 25 cm below the open-end calculate the velocity of sound in air
Answers
The velocity of sound in air is 50 m/s.
To calculate the velocity of sound in air, we can use the formula:
v = f * λ
Where:
v is the velocity of sound
f is the frequency of the sound wave
λ is the wavelength of the sound wave
In this case, the first resonance occurs when the length of the glass tube is a quarter of the wavelength. So, for the first resonance:
λ₁ = 4 * L₁
Where:
λ₁ is the wavelength at the first resonance
L₁ is the length of the tube
Given that L₁ = 30 cm, we can calculate the wavelength at the first resonance:
λ₁ = 4 * 30 cm = 120 cm
Now, when the water level is 25 cm below the open end, the effective length of the tube becomes L₂ = L₁ - 25 cm = 5 cm.
To find the wavelength at the next resonance, we can use the formula:
λ₂ = 4 * L₂
λ₂ = 4 * 5 cm = 20 cm
Since the frequency remains the same (250 Hz), we can now calculate the velocity of sound using the equation v = f * λ:
v = 250 Hz * 20 cm = 5000 cm/s = 50 m/s
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Q7. What caused the early materials to clump together?
A) heat
B) explosions C) pressure
D) gravity
Answers
Answer:
C. pressure
because heat expands and so does explosions and gravity is just gravity.
If an object is an irregularly shaped solid and it is dropped into a graduated cylinder and it displaces 25 mL of water and has a mass of 50 grams what is the density of this irregular shaped object.
Answers
Answer:
1250
Explanation:
a) A cell of dry air is moved vertically from its original position under adiabatic conditions. Depending on the temperature profile of the surrounding atmosphere, this gas cell can keep on moving in the same direction, or it may come back to its original position. Considering the temperature profile of the atmosphere, change of the air cell temperature as it moves up and down in the surrounding atmosphere, as well as relative densities of the air cell and atmosphere, explain why and when the atmosphere is considered to be convectively stable and convectively unstable. In answering this question, use diagrams of temperature change with altitude. (13 marks) b) Explain why the adiabatic lapse rate of dry air is different from the adiabatic lapse rate of wet saturated air. Show them both in a diagram. (5 marks) c) Wet unsaturated air rises from the ocean surface. The ambient lapse rate is higher than the adiabatic lapse rate for dry air. There is a temperature inversion layer at higher altitudes. Show in a schematic diagram how the temperature of the wet air changes with altitude, in comparison with the ambient temperature. Explain at what altitudes the cumulus clouds are formed and why. (7 marks)
Answers
The question addresses the stability of the atmosphere and the factors that determine convective stability or instability. It also explains the difference between the adiabatic lapse rate of dry air and wet saturated air.
a) The stability of the atmosphere is determined by the temperature profile and relative densities of the air cell and atmosphere. If the temperature of the surrounding atmosphere decreases with altitude at a rate greater than the adiabatic lapse rate of the air cell, the atmosphere is considered convectively stable.
In this case, the air cell will return to its original position. Conversely, if the temperature of the surrounding atmosphere decreases slower than the adiabatic lapse rate of the air cell, the atmosphere is convectively unstable. The air cell will continue moving in the same direction.
b) The adiabatic lapse rate refers to the rate at which temperature decreases with altitude for a parcel of air lifted or descending adiabatically (without exchanging heat with its surroundings). The adiabatic lapse rate of dry air is higher (around \(9.8^0C\) per kilometer) compared to the adiabatic lapse rate of wet saturated air (around 5°C per kilometer).
This difference arises because when water vapor condenses during the ascent of saturated air, latent heat is released, reducing the rate of temperature decrease. A diagram can illustrate the difference between the two lapse rates, showcasing their respective slopes.
c) When wet unsaturated air rises from the ocean surface, its temperature decreases at a rate equal to the dry adiabatic lapse rate. However, if the ambient lapse rate (temperature decrease with altitude) is higher than the adiabatic lapse rate for dry air, a temperature inversion layer forms at higher altitudes.
In this inversion layer, the temperature increases with altitude instead of decreasing. A schematic diagram can depict the temperature changes of the wet air in comparison to the ambient temperature, showing the inversion layer.
Cumulus clouds form at the altitude where the rising moist air reaches the level of the temperature inversion layer. These clouds are formed due to the condensation of water vapor as the air parcel cools to its dew point temperature.
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a round pipe of varying diameter carries petroleum from a wellhead to a refinery. at the wellhead, the pipe's diameter is 53.5 cm (0.535 m) and the flow speed of the petroleum is 11.9 m/s. at the refinery, the petroleum flows at 6.65 m/s. what is the volume flow rate of the petroleum along the pipe and what is the pipe's diameter at the refinery
Answers
Answer: its C
Explanation: a round pipe of varying diameter carries petroleum from a wellhead to a refinery. at the wellhead, the pipe's diameter is 53.5 cm (0.535 m) and the flow speed of the petroleum is 11.9 m/s. at the refinery, the petroleum flows at 6.65 m/s. what is the volume flow rate of the petroleum along the pipe and what is the pipe's diameter at the refinery. Its C.
Question 10 of 15
Which of the following are not phases of matter?
A. Gas
B. Mixture
€. Liquid
D. Compound
E. Solid
Answers
Answer:
B. and D.
Explanation:
phases of matter are solid liquid and gas
Answer:
b and d
Explanation:
phases are solid liquid and gas
What is TRUE about cancer cells?
They are just like normal cells except for the way they function.
They form an encapsulated tumor that keeps them in one area of the body
They do not function appropriately in the tissue or organ they are a part of.
The mutations in cancer cells are caused by environmental factors.
Answers
Answer:
they do not function appropriately in the tissue or organ they are a part of.
The statement that is true about cancer cells is They do not function appropriately in the tissue or organ they are a part of. Option C is the correct answer.
Cancer cells differ from normal cells in several ways. One of the key characteristics of cancer cells is that they lose their normal function and behavior within the tissue or organ they originate from. Option C is the correct answer.
Normal cells have specific roles and functions within the body, contributing to the overall health and proper functioning of the tissue or organ they are a part of. In contrast, cancer cells undergo a series of genetic mutations that disrupt their normal function. These mutations can lead to uncontrolled cell growth and division, which is a hallmark of cancer. As a result, cancer cells no longer perform the specialized functions of the tissue or organ they are derived from, and they can interfere with the normal functioning of nearby healthy cells.
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The complete question is, "What is TRUE about cancer cells?
a. They are just like normal cells except for the way they function.
b. They form an encapsulated tumor that keeps them in one area of the body
c. They do not function appropriately in the tissue or organ they are a part of.
d. The mutations in cancer cells are caused by environmental factors."
What distance is required for a train to stop when traveling 50 miles per hour? half mile one and a half miles four miles
Answers
One and a half miles of distance is required for a train to stop when traveling 50 miles per hour.
Rate of change in position, or speed, is equal to distance traveled divided by time. To solve for time, divide the distance traveled by the rate.
Rearranging the formula,
Speed = distance / time.
Distance = speed × time.
Time = distance / speed.
Hence,
Distance = Speed × Time
⇒ Distance = 50 × 60 / 2000
⇒ Distance = 1.5 miles
⇒ Thus, the distance which is required to stop a train is 1.5 miles, which is, One and a half miles.
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A train is moving 4.82 m/s when it begins to accelerate. After 24.8 s, it is moving 7.09 m/s. How far did it move in that time?(Unit = m)
Answers
The displacement of train moves is s = 147.68m.
Equation :To calculate the displacement train moves using the formula of equation of motion,
s = 1/2 ( u + v ) t
Where,
s is displacement
u is initial velocity
v is final velocity
t is time
Given data :
u = 4.82 m/s
v = 7.09 m/s
t = 24.8 s
s = ?
Now, putting the values in equation we get,
s = 1/2 ( 4.82 m/s + 7.09 m/s ) 24.8 s
s = 1/2 x 11.91 m/s x 24.8 s
s = 147.68 m
Hence, the displacement of train moves is s = 147.68m.
Equation of motion :The fundamental equation of motion in classical mechanics is Newton's second law, which declares that the force F acting on a body is equal to that body's mass m times its center of mass's acceleration a, or F = ma.
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energy that is shifted from warmer to cooler temperatures between two substances
Answers
When two substances at different temperatures are in contact, heat energy flows from the warmer substance to the cooler substance until thermal equilibrium is reached. The transfer of heat energy occurs through three main mechanisms: conduction, convection, and radiation.
Conduction occurs when heat energy is transferred between substances in direct contact with each other. In this process, heat flows from the warmer substance to the cooler substance as the atoms or molecules in the warmer substance collide with and transfer energy to those in the cooler substance.
Convection occurs when heat is transferred by the movement of fluids, such as air or water, as a result of temperature differences. Warmer air or water rises and is replaced by cooler air or water, creating a continuous cycle of heat transfer.
Radiation occurs when heat is transferred through electromagnetic waves. All objects emit and absorb radiation, and the amount of radiation emitted depends on the temperature of the object. In this process, heat energy flows from the warmer substance to the cooler substance through the emission and absorption of radiation.
Overall, the transfer of energy from a warmer substance to a cooler substance results in a decrease in the temperature of the warmer substance and an increase in the temperature of the cooler substance until thermal equilibrium is reached. This process is important in many natural phenomena, including weather patterns, climate, and the transfer of heat in everyday objects.
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What is the energy that is shifted from warmer to cooler temperatures between two substances ?
11. In conflict resolution,
promotes____ a win-lose outcome.
Answers
negotiation.
SANA MAKATULONG.
In the conflict resolution, promotes competition a win-lose outcome. Competition results into conflict when two parties tend to seek control over a situation.
What is Competition in conflict management?Competition results when one's own needs are advocated over the needs and requirements of others. It relies on an aggressive style of communication, which is of low regard for future relationships, and the exercise of coercive power. Those who are using a competitive style tend to seek control over a situation, in both the substance and ground rules.
There are times, when competition between two individuals can escalate into an unproductive, and dangerous conflict. The danger can range from unproductive behavior of a person to unethical behavior which could include physical attack. This results into a win-lose outcome.
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there is more role of the moon than the sun to occur tides in oceans?why?
Answers
an ac voltage, whose peak value is 250 v , is across a 360 −ω resistor.
What are the rms and peak currents in the resistor?
Answers
The rms and peak currents in a 360 Ω resistor across an AC voltage with a peak value of 250 V can be calculated using Ohm's Law and the relationship between rms and peak values.
In the given scenario, the peak voltage (Vp) is 250 V. To find the rms current (Irms), we need to divide the peak voltage by the resistance (R):
\(\[ Irms = \frac{Vp}{R} = \frac{250}{360} = 0.694 \, \text{A} \]\)
The peak current (Ip) can be found by dividing the peak voltage by the resistance:
\(\[ Ip = \frac{Vp}{R} = \frac{250}{360} = 0.694 \, \text{A} \]\)
Therefore, the rms current in the resistor is approximately 0.694 A, and the peak current is also 0.694 A.
The rms current is the root mean square value of the alternating current, which represents the equivalent direct current that would produce the same amount of heat in the resistor. It is calculated by dividing the peak voltage by the resistance. In this case, the rms current is 0.694 A.
The peak current is the maximum value of the alternating current waveform. It is also calculated by dividing the peak voltage by the resistance. In this scenario, the peak current is 0.694 A, which is the same as the rms current due to the purely resistive nature of the circuit.
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how to find the velocity
Answers
To find velocity, you need to divide the distance traveled and the time it took to travel that distance.
Velocity is a vector quantity that indicates the rate of change of an object's position in a given direction. It is calculated by dividing the change in position of an object by the time interval over which the change occurred.
The formula for velocity is,
velocity = distance / time
For example, if a car traveled 100 meters in 10 seconds, the velocity would be,
velocity = 100 meters / 10 seconds
velocity = 10 meters per second
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How does changing the mass of an object in the system's acceleration when a constant force is applied?
Answers
When a constant force is applied, an increase in the mass of an object decreases its acceleration and vice versa.
What is the relationship between the force, mass, and acceleration of an object?The mass of an object is the quantity of matter present in the object.
Force is a push or pull agent that causes a change in the motion or state of rest of an object.
Acceleration of an object is the change in velocity with time of the object.
The relationship between the force, mass, and acceleration of an object is given below:
Force = mass * accelerationMass = Force / accelerationAcceleration = Force / massFrom the above formulas, it can be seen that mass and acceleration have an inverse relationship such that as one increases, the other decreases, and vice versa.
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an attendant increase in the amount of electrical power they dissipate. to keep station compartment temperatures from exceeding prescribed limits, it is necessary to transfer the dissipated heat to space. a novel heat rejection scheme that has been proposed for this purpose is termed a liquid droplet radiator (ldr). the heat is first transferred to a high vacuum oil, which is then injected into outer space as a stream of small droplets. the stream is allowed to traverse a distance l, over which it cools b
Answers
The liquid droplet radiator (LDR) is a novel heat rejection scheme proposed to transfer the dissipated heat from electrical power to space in order to prevent station compartment temperatures from exceeding prescribed limits.
This scheme involves transferring the heat to a high-vacuum oil, which is then injected into outer space as a stream of small droplets.
The droplets travel a distance (l) and cool down during this process. This method allows for efficient heat dissipation and helps maintain the desired temperature in the station compartments.
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Do you think a circuit breaker is wired in series or parallel? Why?
Answers
Answer:
I think it's in a series
Explanation:
is this an aviation class
How is an electric force similar to other kinds of forces. I attached the information they put for electricity if you need it
Answers
The interaction of an attracting or repulsive force between two charged bodies is referred to as an electric force.
This force is comparable to other forces in that it strikes and affects a specific item, and it is simple to illustrate using Newton's law of motion. One of the forces acting on other bodies is the electric force.
Electric force is the interaction of any two charged bodies that is either repellant or attracting. Similar to any force, Newton's laws of motion describe how it affects the target body and how it does so. The list of additional forces that apply to objects includes the electric force.
The electrostatic force between the two electrons is one of repulsion since electrons are negatively charged and items with like charges repel one another.
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