What is tmaxtmaxt_max, the longest time after the dragster begins to accelerate that you can possibly run into the back of the dragster if you continue at your initial velocity?
Answers
The correct answer is t_max=V_0/a.
Here, we must apply the motion equation v=u+at to both the first and second conditions. Next, determine the entire time that can be determined using the law of motion. The next thing is our velocity.
Dynamic and kinematic motion descriptions are the two different categories. Dynamics covers a wide range of phenomena since it takes into account the momenta, forces, and energy of the particles.
Let the time be t_max when you collide with the dragster,
speed of dragster at time t_max is at_max .
If at_max = v_0(speed of years) i.e., both have the same speed you will collide with dragster.
t_max = (v-u)/a
=(v_0 - 0)/a
=v_0/a
Hence t_max=V_0/a.
To learn more about velocity refer the link:
https://brainly.com/question/12910124
#SPJ4
Related Questions
the main limitation on the efficiency of heat engines is due to group of answer choices the second law of thermodynamics. the first law of thermodynamics. environmental radical people. reaction forces due to newton's third law. friction in the moving parts.
Answers
Option 5: the main limitation on the efficiency of heat engines is due "friction in the moving parts of the engine can contribute to losses in efficiency. Lubrication and other measures can help to reduce these losses."
Heat engines, including internal combustion engines, are limited in their efficiency by the Second Law of Thermodynamics. This law states that in any energy transfer or conversion, some energy will be lost to the environment as waste heat. The first law of thermodynamics is also relevant here, as it states that energy cannot be created or destroyed, only transferred or converted from one form to another.
Environmental radical people, reaction forces due to Newton's Third Law, and other factors are not typically significant limitations on the efficiency of heat engines.
However, Option 5 is the correct answer "friction in the moving parts of the engine can contribute to losses in efficiency. Lubrication and other measures can help to reduce these losses."
For more such questions on friction
brainly.com/question/24338873
#SPJ11
Kinetic Energy HELP! Brainly included
Answers
Answer:
A
Explanation:
When you dropping the swing, it increases the kinetic energy. In the middle, that is when it is at it's fullest potential. As it makes its way up, it pushes again the gravitational force, and soon, the swing will stop at the top for a VERY SHORT AND SMALL period of time. That is when it is at it's very weakest point, making the answer, indeed, A.
because of the pressure inside a popcorn kernel, water does not vaporize at 100°C. Instead, it stays liquid until its temperature is about 175°C, at which point the kernel ruptures and the superheated water turns into steam. How much energy is needed to pop 95.0 g of corn if 14 percent of a kernel's mass consists of water? Assume that the latent heat of vapor- ization for water at 175°C is 0.90 times its value at 100°C and that the kernels have an initial temperature of 175°C.
Answers
The energy needed is 35.4 KJ, to pop the corn of a given quantity, and by using latent heat of vaporization of water.
What is Energy?
When work is done and heat and light are produced, energy is the quantitative quality that is transferred to the body or to the physical system. The law of conservation of energy asserts that although energy can be changed in form, it cannot be created or destroyed. Energy is a conserved quantity.
Calculations:
The boiling point of water is 175 °C.
The mass of corn is 95.0 g.
The percentage of water in corn is 14%.
The latent heat of vaporization for water at 175 °C is 0.90 times its value at 100 °C.
Calculate the mass of water,
Mw = (14/100) × (95g) × (1kg/1000g)
= 0.0133 Kg
calculate the latent heat of vapourization,
Lv = (0.9) × (2.26 × \(10^{6}\)J/kg)
= 2.034 × \(10^{6}\) J/kg
Total heat required,
Q = Mw Lv + Mw. C Δ T
Substitute the values,
Q = (0.0133) × (2.034 × \(10^{6}\)) + (0.0133) × (4186) × (175.25)
= (35403.27 J) × ( 1KJ/ 1000J)
= 35.4 KJ
Hence, the energy needed is 35.4 KJ, to pop the corn of a given quantity.
To know more about Energy, check out:
https://brainly.com/question/13881533
#SPJ1
plz i need help please help
Answers
Answer:
if you look it up i think u can find it it could be a mealltiod Co 27
Explanation:
Compare the values for index of refraction of glass for each trial (values in last column) Is there good agreement between them? Would you conclude that index of refraction is constant for & given medium? Compare your calculated nz with the given index of refraction, nglass. Do they agree? Explain why it does or doesn't"
Answers
The calculated average n2 does not agree with the given index of refraction, indicating a potential discrepancy that may be attributed to experimental limitations or errors.
To analyze the agreement between the values for the index of refraction (n2) of glass in each trial, we can observe the trend and variation in the data. From the table, it appears that the values for n2 increase as the angles θ1 and θ2 increase. However, it is difficult to determine the level of agreement between the values without further statistical analysis or calculation of uncertainties.
The conclusion regarding whether the index of refraction is constant for a given medium depends on the level of agreement observed. If the values for n2 in each trial are close to each other and do not deviate significantly, it suggests good agreement and supports the hypothesis of a constant index of refraction.
On the other hand, if there is significant variation and inconsistency among the values, it indicates that the index of refraction may not be constant for the given medium.
To determine the average value of n2 from the provided results, we can calculate the mean of the n2 values:
Average n2 = (1.46 + 1.61 + 1.73 + 1.96 + 2.08 + 2.13) / 6 ≈ 1.85
Comparing the calculated average n2 (1.85) with the given index of refraction of the glass (1.50), we can see that they do not agree. The calculated average n2 is higher than the given value of 1.50. This suggests that there might be some systematic error or uncertainties in the measurements or calculations.
The difference between the calculated and given values could be due to factors such as experimental errors, instrumental limitations, or other sources of uncertainty in the measurement process.
To know more about refractive index, refer:
https://brainly.com/question/14703761
#SPJ4
Complete question is:
Calculate sinθ1, sinθ2 and n2 for each of your results and add them to table 1. Keep your results to 2 or 3 significant figures.
Compare the values for index of refraction of glass for each trial (values in last column). Is there good agreement between them? Would you conclude that index of refraction is a constant for a given medium?
Determine the average value of n2 from your results.
Compare your calculated n2 with the given index of refraction of the glass (1.50). Do they agree? Explain why it does or doesn’t.
Convert 3.8 kg to Lbs
Answers
Answer:
8.37757
Explanation:
may i have brainliest
what is meant by the term moment in "physics".
Answers
In an electric circuit, 40 C of electric charge pass a point in 5.0 s.
What is the current in the circuit?
A 0.13A
B
8.0A
C 45A
D
200 A
Answers
Answer:
Explanation:
current=amount of charge/time taken
=40/5
=8 ampere(A)
The current flowing in the circuit is 8 A.
The correct answer to the question is Option B. 8 A.
Quantity of electricity, current and time are related by the following equation:
Q = ItWhereQ is the quality of electricity.
I is the current.
t is the time.
With the above formula, we can obtain the current in the circuit as illustrated below:Quantity of electricity (Q) = 40 C
Time (t) = 5 s
Current (I) =?Q = It
40 = I × 5
Divide both side by 5
I = 40 / 5
I = 8 AThus, the current in the circuit is 8 A.
The correct answer to the question is Option B. 8 A
Learn more: https://brainly.com/question/21690385
Which of the following describes the correct order of energy conversions necessary to form electricity from solar panels?
Solar Heat Kinetic → Electric
Solar- Kinetic Heat → Electric
Solar 1 Heat → Electric
O Solar ->Electric
Answers
Answer:
hydrochlorine +12÷B to the power of 4 -× y reapeated zminus 2 to the power of 9
what are the magnitude and direction of the friction force that the table exerts on the plate during the push? express your answer with the appropriate units. enter positive value if the direction of the force is the same as that of the acceleration of the plate and negative value if the direction is opposite.
Answers
The magnitude and direction of the friction force that the table exerts on the plate during the push depend on the specific scenario. It can be positive, indicating a force in the same direction as the acceleration, or negative, indicating a force in the opposite direction.
The friction force that the table exerts on the plate during the push can vary depending on the circumstances. In general, the friction force opposes the relative motion or tendency of motion between the surfaces in contact. It can have a static or kinetic nature, depending on whether the surfaces are at rest or in motion.
If the plate is being pushed in a direction that causes it to accelerate in the same direction, the friction force would act in the opposite direction to oppose this acceleration. In such cases, the friction force would have a negative value to indicate its direction opposite to the acceleration.
Conversely, if the plate is being pushed in a direction that causes it to accelerate in the same direction as the push, the friction force would act in the same direction as the acceleration. In this situation, the friction force would have a positive value to indicate its direction aligned with the acceleration.
To determine the specific magnitude and direction of the friction force, additional information about the scenario, such as the nature of the surfaces and the magnitude of the applied force, would be required.
Learn more about acceleration here:
https://brainly.com/question/30660316
#SPJ11
as a car drives past a person standing on a sidewalk, the driver keeps a hand on the horn. how does the pitch of the horn differ for the driver and the person standing on the sidewalk?
Answers
Answer:
While the car is going towards the standing person on the sidewalk he is listening the pitch of the horn higher then it is.
When the car passes the person on the sidewalk and goes away, the horn's pitch become lower (for the person standing on the sidewalk).
For the driver, the pitch is always the same.
Explanation:
Is the doppler effect.
When the car is approaching, the sound waves must travel a smaller space than the previous one and they take less time to reach the standing person. So, sound waves reach the standing person with a higher frequency.
It happens the opposite when the car is going away: the sound waves need to travel more space and take more time to reach the person on the sidewalk. So, the frequency of the waves is lower.
Question:
Which of the following has the most kinetic energy?
Answer Choices:
A. a 25-kg fish tank sitting on a table
B. a 50-g fish swimming in a fish tank
C. a 7,500-kg car parked on a steep hill
D. a 50-kg boulder suspended from a cliff
Answers
Answer:
B: a 50-g fish swimming in a fish tank.
Explanation:
I chooses B because kinetic energy is energy present in moving bodies or objects. And the fish swimming has kinetic energy because it is moving
If a spinning skater pulls her arms in so as to reduce her rotational inertia by half, by how much will her rate of spin increase
Answers
Could someone please explain isotopes, and what they do/are? If not thats fine, thank you
Answers
Answer:
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
"some elements have only one stable isotope"
Explanation:
there ya go! Pls give me brainliest!
The charge of a transition metal cation is determined using the known charge on the element being combined with the transition metal.
Please select the best answer from the choices provided
T
F
Answers
Answer:
True
Explanation:
You can easily determine the charge of transition metal ions in neutral compounds, as long as you know the charge or oxidation state of the atoms that partner with the transition metal.
Answer:
T
Explanation:
The critical angle for a certain liquid-air surface is 47.2 degree. What is the index of refraction of the liquid?
Answers
To find the index of refraction of the liquid, we can use the formula for the critical angle:
The index of refraction of a medium can be determined using the formula: n = 1 / sin(critical angle) where n is the index of refraction and the critical angle is measured in radians. To convert the critical angle from degrees to radians, we use the conversion factor π/180. In this case, the critical angle is 47.2 degrees. Converting it to radians: critical angle (in radians) = 47.2 degrees × π/180 ≈ 0.823 radians. Now we can calculate the index of refraction: n = 1 / sin(critical angle) ≈ 1 / sin(0.823) ≈ 1 / 0.731 ≈ 1.368. Therefore, the index of refraction of the liquid is approximately 1.368.sin(critical angle) = 1 / refractive index of the liquid. Given that the critical angle is 47.2 degrees, we can calculate the refractive index (n) of the liquid as follows: sin(47.2 degrees) = 1 / n. Using a scientific calculator or trigonometric tables, we find: n = 1 / sin(47.2 degrees) ≈ 1.318 Therefore, the index of refraction of the liquid is approximately 1.318.
To learn more about critical, https://brainly.com/question/30002645
#SPJ11
Does the amount of water present in a calorimeter affect the change in temperature? how?.
Answers
Water has a high specific heat, that makes it is difficult to increase the temperature of water. However, it also has the capacity to retain heat, which allows the other substance inside the calorimeter to absorb that heat.
Calorimetry is one technique that we can use to measure the amount of heat involved in a chemical or physical process. It is used to measure amounts of heat transferred to or from a substance.
A calorimeter is a device that is used to measure the amount of heat involved in a chemical or physical process. Water is best to use in a calorimeter because it has a high specific heat, also, other liquids such as ethanol can also be used. However, for practical reasons such as water's ability to be easily measured as well as its affordability, it is known to be the best choice.
This means that we can still measure the temperature using a standard thermometer. If a substance reached excessive temperatures, then we would need to use an expensive thermometer to measure it.
Learn more about Calorimeter here
https://brainly.com/question/18402338
#SPJ4
4. a 1.0-kilogram mass gains kinetic energy as it falls freely from rest a vertical distance, d. how far would a 2.0 kilogram mass have to fall freely from rest to gain the same amount of kinetic energy? (a) d (b) 2d (c) d/2 (d) d/4
Answers
The 2.0-kilogram mass would have to fall freely from rest a vertical distance of d/2 to gain the same amount of kinetic energy as the 1.0-kilogram mass falling a distance of d.
Hence, the correct option is C.
The amount of kinetic energy gained by a falling object depends on its mass and the vertical distance it falls. The kinetic energy gained by an object falling freely from rest can be calculated using the equation:
KE = m * g * d
Where:
KE is the kinetic energy gained
m is the mass of the object
g is the acceleration due to gravity
d is the vertical distance fallen
In this scenario, we are comparing a 1.0-kilogram mass falling a vertical distance, d, to a 2.0-kilogram mass falling a certain distance to gain the same amount of kinetic energy.
Let's assume the vertical distance fallen by the 2.0-kilogram mass is represented by d'.
Using the equation for kinetic energy, we can write the following relationship:
(m1 * g * d) = (m2 * g * d')
Substituting the given values, we have:
(1.0 kg * 9.8 m/\(s^{2}\) * d) = (2.0 kg * 9.8 m/\(s^{2}\) *d')
Simplifying the equation, we find:
d = 2 * d'
Dividing both sides of the equation by 2, we get:
d/2 = d'
Therefore, the 2.0-kilogram mass would have to fall freely from rest a vertical distance of d/2 to gain the same amount of kinetic energy as the 1.0-kilogram mass falling a distance of d.
Hence, the correct option is C.
To know more about kinetic energy here
https://brainly.com/question/999862
#SPJ4
NOTICE: BRAINLIEST WILL BE GIVEN!
what is radioactivity?
Answers
Answer:
As its name implies, radioactivity is the act of emitting radiation spontaneously. This is done by an atomic nucleus that, for some reason, is unstable; it "wants" to give up some energy in order to shift to a more stable configuration.
Explanation:
Too many neutrons in a nucleus lead it to emit a negative beta particle, which changes one of the neutrons into a proton. Too many protons in a nucleus lead it to emit a positron (positively charged electron), changing a proton into a neutron. Too much energy leads a nucleus to emit a gamma ray, which discards great energy without changing any of the particles in the nucleus. Too much mass leads a nucleus to emit an alpha particle, discarding four heavy particles (two protons and two neutrons).
What can you infer about a wave with a short wavelength? Question 5 options: It has a low amplitude. It has a high amplitude. It has a high frequency. It has a low frequency.
Answers
Option C is correct. It has a high frequency. Wavelength is inversly proportional to the frequency. For short-wavelength, the frequency will be high.
Describe the connection between wavelength & frequency?Frequency and wavelength have an inverse connection with one another. As a result, the wave with a high frequency should have a short wavelength.
For short-wavelength, the frequency will be high.
Hence Option C is correct. It has a high frequency.
To learn more about the frequency refer to the link;
https://brainly.com/question/14926605
Answer:
c <33
Explanation:
How do the cities in the northern hemisphere compare to those in the southern hemisphere?
Answers
Helppppppp :((((((
:((((((
Answers
Answer:
b is the equivalent
do u want explanation
Science
Write two examples of heating appliances
Answers
Answer:
a} Infrared radiant heaters.
b} Fan heaters.
Explanation:
I hope this is okay, should I give more.
-. Cheryl travels in her convertible at an average speed of 27 m/s between Hamilton and London. It takes her 1.4 h to travel the distance. How far (in km) does she travel?
Answers
Cheryl covers the first 50 miles of the journey in 50 miles and the second 75 miles in 75 miles. 3 kilometers have been traveled in total.
How is average speed determined?It is calculated by dividing the overall distance traveled by the overall journey time. Consider the older automobile as an illustration. The car's average speed would be 70 / 2 = 35 miles per hour if it covered 70 miles in two hours. Hence, its speed would be 35 mph.
How do you determine speed?Speed indicates how quickly something or someone is moving. If you know how far something has traveled and how long it took to get there, you can calculate its average speed.
To know more about speed visit:-
brainly.com/question/28224010
#SPJ1
BRAINLY HELP. If an anvil is dropped by Bugs Bunny, at what point will it have the most Kinetic Energy?'
a - Just before it lands
b - Right at the moment it is let go
c - Kinetic energy doesn't exist, its made up
d - Half Way Down
Answers
Answer:
A
Explanation:
so it would have the most kinetic energy when it is the fastest and that would be right before it lands becasuse gravity has been accelerating it the whole time so A.
if my answer helps please mark as brainliest.
About 50,000 years ago, in an area located outside Flagstaff, Arizona, a giant 4.5 107-kg meteor fell and struck Earth, leaving a 180-m-deep hole now known as Barringer crater. If the meteor was traveling at 20,000 m/s upon impact, with what average force did the meteor hit the earth?
Answers
Answer:
\(F_A =5.625*10^1^6N\)
Explanation:
From the question we are told that
50,000 years ago,
A giant 4.5 107-kg meteor
180-m-deep hole
20,000 m/s
Generally for this problem the energy change is given as
\(\triangle E=\frac{1}{2} mv^2 +mgd\)
Having the potential and kinetic energy in place
Mathematically solving for Average force\(F_A\)
\(\triangle E=F_a*d\)
\(F_A =\frac{1/2* 4.5*10^7(20,000)^2-kg+4.5*10^7*9.81*160}{160}\)
Therefore Average force \(F_A\) is given by
\(F_A =5.625*10^1^6N\)
number of protons and electrons and atomic mass for a given element
Answers
Explanation:
You can simply subtract the atomic number from the mass number in order to find the number of neutrons. If the atom is neutral, the number of electrons will be equal to the number of protons.
Remember!
1. Your mass number is the total number of neutrons and protons within the atom.
2. Your atomic number is the amount of protons within the atom.
3. For neutral atoms, the electron number is the same as the atomic number.
A toroidal solenoid with a rectangular cross-section is wound uniformly with turns. The inner radius is , the outer radius is , and it has a thickness of . What is the self inductance of this device
Answers
The self-inductance of the toroidal solenoid is 0.710 millihenries.
L = μ₀N²A / l
A = π(b² - a²) - 4t(b - a)
where a = 4.00 cm, b = 9.00 cm, and t = 2.50 cm. Substituting these values, we get:
A = π(9.00² - 4.00²) - 4(2.50)(9.00 - 4.00) = 316.8 cm²
l = 2π(b + a)
Substituting the values, we get:
l = 2π(9.00 + 4.00) = 26.18 cm
Finally, we can calculate the self-inductance L as:
L = μ₀N²A / l
Substituting the values, we get:
L = (4π×\(10^{-7\) T·m/A)(360²)(316.8×\(10^{-4\) m²) / (26.18×\(10^{-2\) m) = 0.710 mH
A solenoid is an electromechanical device that converts electrical energy into mechanical energy. It consists of a coil of wire wrapped around a magnetic core, which can be made of iron, steel, or other magnetic materials. When an electric current is applied to the coil, it creates a magnetic field that causes the core to move in a linear or rotational motion.
Solenoids are used in a wide variety of applications, including valves, switches, locks, and motors. For example, a solenoid valve is a type of valve that is controlled by an electric current, allowing for the precise control of fluid flow. A solenoid lock uses a magnetic field to hold a locking mechanism in place, and can be unlocked by applying an electric current to the coil.
To learn more about Solenoid visit here:
brainly.com/question/15576393
#SPJ4
Complete Question:
A toroidal solenoid with a square cross-segment is wound uniformly with 360 turns. The inner radius isa= 4.00 cm, the outer radius isb= 9.00 cm, and it has a thickness oft= 2.50 cm. What's the self-inductance of this device?
Displacement is a measure of __________ in ________.
Answers
Displacement is a measure of the shortest distance between a starting point and an ending point in meters.
What is displacement?The displacement can be described as the change in the position of an object. The displacement can be described as the minimum length between the initial and the final point.
The displacement is the vector parameter that exhibits both distance and magnitude. Therefore, the measurement of the displacement of an object involves the direction.
Displacement can also be defined as the shortest distance between a starting point of an object and an ending point. Displacement can be measured as a straight line and the SI unit of the displacement is meters and the C.G.S. unit is centimeters.
Learn more about displacement, here:
brainly.com/question/14422259
#SPJ1
define the unit of time and unit of length
Answers
The base unit for time is the second (the other SI units are: metre for length, kilogram for mass, ampere for electric current, kelvin for temperature, candela for luminous intensity, and mole for the amount of substance). The second can be abbreviated as s or sec.
Answer:
hope you like
Explanation:
A unit of time is any particular time interval, used as a standard way of measuring or expressing duration.Its SI unit is second
A unit of length refers to any arbitrarily chosen and accepted reference standard for measurement of length. Its SI unit is meter