A car traveling at a velocity of 25 m/s increases its velocity to 30.0 m/s in 10.0 seconds. What is the magnitude of its acceleration?
Answers
Hi there!
We can use the kinematic equation:
vf = vi + at
vf = final velocity (m/s)
vi = initial velocity (m/s)
a = acceleration (m/s²)
t = time (sec)
Rearrange to solve for acceleration:
(vf - vi)/t = a
(30 - 25)/10 = 5/10 = 0.5 m/s²
Answer:
Explanation: vf-vi/t = a
a=30m/s -25 m/s/10 s
a =5m/s /10s
a =1/2 m/s²
Related Questions
For years, the tallest tower in the United States was the Phoenix Shot Tower in Baltimore, Maryland. The shot tower was used from 1828 to1892 to make lead shot for pistols and rifles and molded shot for cannons and other instruments of warfare. Molten lead was dropped from the top of the 82.15 m tall tower into a vat of water. During its free fall, the lead would form a perfectly spherical droplet and solidify. Determine the velocity of the droplet right before it hits the ground.
Answers
Answer:
The velocity of the droplet right before it hits the ground is 40.08 m/s.
Explanation:
To determine the velocity of the droplet right before it hits the ground,
From one of the equations of kinematic for free fall motions,
v = u + gt
Where v is the final velocity
u is the initial velocity
g is acceleration due to gravity (take g = 9.8 m/s²)
and t is time
For the question, v is the velocity of the droplet right before it hits the ground.
u = 0 m/s (Since the molten lead was dropped from rest)
Therefore,
v = gt
First, we will determine the time t
Also, from one of the equations of kinematic for free fall motions,
h = ut + 1/2(gt²)
u = 0 m/s
From the question, the molten lead was dropped from the top of the 82.15 m tall tower, therefore
h = 82.15
Hence,
82.15 = 0×t + 1/2 (9.8 × t²)
82.15 = 1/2 (9.8 × t²)
82.15 = 4.9 t²
t² = 82.15/4.9
∴ t = 4.09 secs
Now, for the velocity v, of the droplet right before it hits the ground,
Recall
v = gt
Then,
v = 9.8 × 4.09
v = 40.08 m/s
Hence, the velocity of the droplet right before it hits the ground is 40.08 m/s.
Who created the periodic table
Answers
Answer:
Dimitri Mendeleev
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.
A solid sphere with mass, M, and radius, R, rolls along a level surface without slipping with a linear speed, v. What is the ratio of rotational to linear kinetic energy? (For a solid sphere, I = 0.4 MR2).
Answers
According to the question the ratio of rotational to linear kinetic energy is Krot/Klin = 0
What is kinetic energy?Kinetic energy is a form of energy that an object possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. It is directly related to an object's mass and velocity. Kinetic energy can be transferred between objects and transformed into other forms of energy.
The linear kinetic energy, Klin, is given by Klin = 0.5*m*v², where m is the mass and v is the linear velocity.
Assuming that the sphere is rolling without slipping, the linear and angular velocities are related by the equation v = ω*R, where R is the radius of the sphere.
Substituting this into the equations for Krot and Klin gives:
Krot = 0.5*I*(v/R)²
Klin = 0.5*m*v²
Therefore, the ratio of rotational to linear kinetic energy is:
Krot/Klin = (I*(v/R)²)/(m*v²) = I/(m*R²)
Substituting the value for I (given as 0.4 MR2) into the equation gives:
Krot/Klin = 0
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In Platos credo, Socrates, believes that he should follow the laws of the state Athens, because?
Answers
In Plato's philosophy, Socrates believed that he should follow the laws of the state of Athens because he believed in the idea of the "philosopher-king."
Who was Socrates?
Socrates was a classical Greek philosopher, credited as one of the founders of Western philosophy. He is best known for his method of inquiry, called the Socratic method, and for his teaching style, which was dialogic and aimed at getting students to think critically and develop their own ideas.
According to Socrates, the laws of the state were a reflection of the absolute and unchanging moral values that exist in the world. He believed that as a philosopher, it was his duty to live in accordance with these moral values, and thus to follow the laws of the state. In this way, Socrates saw himself as a servant of the divine, and believed that by following the laws, he was serving the greater good and promoting the welfare of the city.
Hence, In Plato's philosophy, Socrates believed that he should follow the laws of the state of Athens because he believed in the idea of the "philosopher-king."
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obtain the temp. at which the reading of Fahrenheit is double of that in Celsius scale.
Answers
Answer:
320 degrees fahrenheit and 160 degrees celcius
Explanation:
there's a formula that i definately don't remember but it exists
One of the major differences between our common Physics models of energy change and realistic models of them is
In the Physics models, the acceleration due to gravity is rounded to a non-exact but easier to use number
In the Physics models, the velocities are only calculated at set intervals of time, instead of continuously
In the Physics models, the objects are assumed to have simplified shapes in order to make motion by acceleration easier to calculate
In the Physics models, we do not take into account the energy change by the friction of moving components
Answers
Answer: In the Physics models, we do not take into account the energy change by the friction of moving components
Explanation:
use Newton's law of cooling to solve the problem Note: this is an algebra 2 problem. However, after 4 math tutors from here, they all couldnt answer and claimed its a physics problem. Maybe a physics tutor can helo? if needed, I can send a practice problem which is similar. we did it in class
Answers
Newton's law of cooling relates the temperature of an object with the time. This law is the following:
\(T=(T_0-T_r)e^{rt}+T_r\)Where:
\(\begin{gathered} T=\text{ temperature at time "t"} \\ T_0=\text{ initial temperature} \\ T_r=\text{ temperature of the surroundings} \\ r=\text{ rate of }cooling \\ t=\text{ time} \end{gathered}\)Since we are asked to determien time we need to solve for "t". To do that we will subtract the temperature of the surrounding from both sides:
\(T-T_r=(T_0-T_r)e^{-rt}\)Now, we divide by the factor multiplying "e":
\(\frac{T-T_r}{T_0-T_r}=e^{-rt}\)Now, we use natural logarithm on both sides:
\(\ln (\frac{T-T_r}{T_0-T_r})=\ln (e^{-rt})\)Now, we use the following property of logarithms on the right side:
\(\ln e^x=x\)This means that we can lower the exponent, like this:
\(\ln (\frac{T-T_r}{T_0-T_r})=-rt\)Now, we divide both sides by "-r":
\(-\frac{1}{r}\ln (\frac{T-T_r}{T_0-T_r})=t\)Now, we substitute the values:
\(-\frac{1}{0.067}\ln (\frac{100F-72F}{180F-72F})=t\)Solving the operations:
\(20.15\min =t\)Therefore, the time to wait is 20.15 minutes.
12) Driving home from school one day, you spot a ball rolling out into the street (FIGURE 5-27). You brake for 1.20 s, slowing your 950-kg car from 16.0 m>s to 9.50 m>s. What was the average forceexerted on your car during braking and How far did you travel while braking?
Answers
We are given the following information
Mass of car = 950 kg
Initial speed of car = 16.0 m/s
Final speed of car = 9.50 m/s
Time = 1.20 s
The average force exerted on the car during braking can be found using Newton's 2nd law of motion
\(F=m\cdot a\)Where m is the mass of the car and a is the acceleration of the car.
The acceleration of the car is given by
\(\begin{gathered} a=\frac{v_f-v_i}{t} \\ a=\frac{9.50-16.0}{1.20} \\ a=-5.4167\; \; \frac{m}{s^2} \end{gathered}\)The negative sign indicates deacceleration since the car is stopping.
So, the force is
\(\begin{gathered} F=m\cdot a \\ F=950\cdot5.4167 \\ F=5145.865\; \; N \end{gathered}\)Therefore, an average force of 5145.865 N was exerted on your car during braking.
The distance traveled by the car while braking can be found as
\(s=v_i\cdot t+\frac{1}{2}\cdot a\cdot t^2\)Let us substitute the given values
\(\begin{gathered} s=16.0\cdot1.20+\frac{1}{2}\cdot(-5.4167)\cdot(1.20)^2 \\ s=19.20-3.90 \\ s=15.3\; m \end{gathered}\)Therefore, the car traveled a distance of 15.3 m while braking.
How quickly will increases in the monetary base translate into new bank loans and thus larger increases in m1 and m2?
Answers
Increases in the monetary base can lead to new bank loans and larger increases in M1 and M2, but the speed at which this occurs can vary.
Here is a step-by-step explanation of the process:
1. The monetary base refers to the total amount of currency in circulation, including physical currency and reserves held by banks at the central bank.
2. When the central bank increases the monetary base by buying government bonds or other assets, it injects money into the economy.
3. Banks are required to hold a certain percentage of their deposits as reserves. The increase in the monetary base increases the amount of reserves available to banks.
4. With more reserves, banks have the ability to lend out more money. This can lead to an expansion of credit and the creation of new bank loans.
5. As banks make new loans, the money supply in the economy increases, leading to larger increases in M1 and M2.
6. M1 refers to the narrowest definition of the money supply, which includes currency in circulation, demand deposits, and traveler's checks. M2 is a broader measure that includes M1 plus savings deposits, time deposits, and money market funds.
7. The speed at which increases in the monetary base translate into new bank loans and larger increases in M1 and M2 depends on various factors such as the demand for loans, lending standards, and the overall economic environment.
8. In times of economic downturn or tight credit conditions, banks may be more cautious in extending loans, which can slow down the transmission of the increase in the monetary base to the broader money supply.
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Some drops a ball off of the top of a 125-m-tall building. In this prob-lem, you will be solving for the time it takes the ball to hit the ground.(a)Define your coordinate system, be thorough.(b)Write down the given infor-mation, be sure to include hidden information.(c)State what physics principleis at play here. How do you know this?(d)Select an equation.(e)Solve forthe time it takes for the ball to hit the ground.
Answers
Answer:
t = 5.05 s
Explanation:
This is a kinetic problem.
a) to solve it we must fix a reference system, let's use a fixed system on the floor where the height is 0 m
b) in this system the equations of motion are
y = v₀ t + ½ g t²
where v₀ is the initial velocity that is v₀ = 0 and g is the acceleration of gravity that always points towards the center of the Earth
e) y = 0 + ½ g t²
t = √ (2y / g)
t = √(2 125 / 9.8)
t = 5.05 s
Learning Task 2: Prepare a basin with half-filled water and stone. Drop a stone
into the basin and observe what will happen. Write your answers in your
answer sheet.
1. What happens when you drop the stone?
2. What causes the ripples to form?
3. How far does the ripple continue?
Answers
Answer:
1 . What happens when you drop the stone?
Depending on the weight from which the stone was dropped, the glass might well break
2 depending on the size and weight and shape on the stone the glass might well break
3 depending on the density on the stone the stone might when float on the water
Explanition :
GIVE ME BRAINLESS PLEASE !!
The experiments are performed to check the observation of the theory.
The basin is filled with water to check the following observation in the question.
The answers are as follow:-
When you dropped the stone in the water, the water comes out from the basin which is equal to the weight of the stone.2. The impact of stone created the ripple. The magnitude of the ripple depends on the height at which stone it was thrown.
3. The ripple goes far as the weight of the stones
These are the answer to the following.
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What is the relationship between frequency and wavelength?
Answers
Answer:
The wave with the greatest frequency has the shortest wavelength. Twice the frequency means one half the wavelength.
Explanation:
Frequency and Wavelength are inversely proportional to each other.
A 5-kg fish swimming at a speed of 1 m/s swallows an absent-minded 1-kg fish at rest. The speed of the larger fish after lunch is
Answers
Answer:
Explanation:
So:
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5
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1
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+
(
1
⋅
−
4
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=
(
5
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v
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What are the forces applied?
Answers
The forces applied on the bucket are tension and gravitational.
What is the gravitational force?
According to Newton’s gravitational law, it is the force exerted due to attraction between two objects that is directly proportional to the product of their masses and is inversely proportional to the square of distance between them.
The force applied to the bucket containing water is gravitational force. The gravitational force acts in downward direction and there is no change in the state of motion. There is another force as well which is the muscular force by which we hold the bucket in the upward direction with the help of our muscles. Tension is also exerted on the bucket as this force is seen in existence when any object is being pulled up with the help of string or rope. It is always seen in the direction which is parallel to the rope.
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A 0.5 kg ball has a velocity of 20 m/s.
a. What is the kinetic energy of the ball?
B. How much work would be required to stop the ball
Answers
The kinetic energy of the ball is 100j
100j of work would be required to stop the ball.
What is Kinetic energy?Kinetic energy is a form of energy that an particle has by reason of it's motion.if we accelarate a object we must apply a force.
Here the mass (m) is 0.5 kg
It's velocity (v) is 20 m/s
The kinectic energy is
KE = 1/2 mv^2 = 1/2(0.5)20.20= 100 J
Again the workdone to stop it is calculated by work energy theorem
Change in KE = workdone
Or 100 J - 0 J or 100 J needed to stop the ball.
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¿Qué cantidad de calor absorbió una masa de 4 g de cinc al pasar de 20 °C a
180 °C?
Answers
(amount of heat)Q = ? , (Mass) m= 4 g , ΔT = T f - T i = 180 c° - 20 °c = 160 °c ,
Ce = 0.093 cal/g. °c
Q = m C ΔT
Q = 4 g × 0.093 cal/g.c° × ( 180 °c- 20 °c )
Q= 4×0.093 × 160
Q = 59.52 cal
I hope I helped you^_^
A student drove to campus from her home and noted that the odometer reading of her car increased by 12 km. The trip took 18 minutes. If the straight line distance from her home to the university is 10.3 km in a direction 25 degrees south of east, what was the magnitude of her average velocity in km/hr
Answers
Answer:
\(34.33\ \text{km/h}\)
Explanation:
t = Time taken in her journey = 18 minutes =\(\dfrac{18}{60}\ \text{hours}\)
s = Displacement of the student = \(10.3\ \text{km}\)
Average velocity is given by
\(v=\dfrac{\text{Displacement}}{\text{Time taken}}\\\Rightarrow v=\dfrac{s}{t}\\\Rightarrow v=\dfrac{10.3}{\dfrac{18}{60}}\\\Rightarrow v=34.33\ \text{km/h}\)
The magnitude of the student's average velocity is \(34.33\ \text{km/h}\).
astronomers estimate that the plains of venus are only about 500 to 600 million years old. how do we estimate dates like this?
Answers
The venusian plains are barely 500–600 million years old, according to astronomers. By counting the craters that are visible on the surface and comparing crater counts to other worlds.
They can make an approximation of this kind. A surface is the outermost or highest layer of a physical object or place, to use the term in its most common usage. It is the area or piece of the thing where an observer can first perceive it through touch and sight and where other materials first come into contact with it. A force in physics is an effect that has the power to alter an object's motion. A mass-containing object's velocity can be altered by a force (e.g. moving from a state of rest).
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Our earth is situated in the milky way galaxy. The milky way galaxy is which type of galaxy?.
Answers
Answer:
Our earth is situated in the Milky Way galaxy. The Milky Way galaxy is a type of spiral galaxy.
Explanation:
spiral galaxy
The Milky Way is a huge collection of stars, dust and gas. It's called a spiral galaxy because if you could view it from the top or bottom, it would look like a spinning pinwheel. The Sun is located on one of the spiral arms, about 25,000 light-years away from the center of the galaxy.
What is benford's law.
Answers
Answer:
Known variously as the Newcomb–Benford law, the law of anomalous numbers, or the first-digit law, Benford's Law is the observation that the first digit in many real-world collections of numerical data will be tiny, as shown by the example of the first-digit law.
Explanation:
Hope it helps:)
What is the reason eclipses do not happen every full moon and new moon
A. The moon rotates around itself slower than Earth rotates around itself
B. The moon completes a rotation around the earth faster than earth complete a rotation around the sun
C. The moon has a much smaller mess than earth or the moon
D. The moons orbit around the earth is tilted compared to the earths orbit around the sun
Answers
By use PDE thought, If it takes a 2 cm long insulated bar 7
minutes to cool down to room temperature, how long does it takes a
6 cm bar (made of the same material)? Explain.
Answers
It will take the 6 cm bar 10.6 minutes to cool down to room temperature.
If it takes a 2 cm long insulated bar 7 minutes to cool down to room temperature, it will take a 6 cm bar made of the same material more than 7 minutes to cool down to room temperature.
First, we have to understand that the rate of cooling is inversely proportional to the length of the bar. This is because the it will take the 6 cm bar 10.6 minutes to cool down to room temperature. Surface area of the bar is directly proportional to its length.
Therefore, a longer bar will have more surface area and will lose heat faster than a shorter bar.
rate of cooling α 1/length of the bar Let's say the time it takes for the 6 cm bar to cool down to room temperature is T. 7/2 = T/6
T = 21/2
Therefore, it will take the 6 cm bar 10.6 minutes to cool down to room temperature.
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What is the speed of light in furlongs per fortnight? The speed of light is2.998×108 m/s. You might find the following conversions helpful in you calculation:• 1 furlong = 220 yds• 1mi = 5280 ft• 1 fortnight = 14 days
Answers
The speed of light in furlongs per fortnight is approximately 1.802 x 10¹² furlongs/fortnight.
We can start by converting meters to furlongs and seconds to fortnights.
1 meter = 1/201.17 furlongs (since 1 furlong = 220 yards and 1 yard = 0.9144 meters)
1 second = 1/1,209,600 fortnights (since 1 day = 24 hours, 1 hour = 60 minutes, 1 minute = 60 seconds, and 1 fortnight = 14 days)
Using these conversions, we have:
Speed of light = 2.998 x 10⁸ m/s
= (2.998 x 10^⁸ m/s) x (1/201.17 furlongs/m) x (86,400 s/day) x (1 day/14 fortnights)
= 1.802 x 10^¹² furlongs/fortnight
Therefore, the speed of light in furlongs per fortnight is approximately 1.802 x 10^¹² furlongs/fortnight.
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Please please please please please please please please please please please please please please please please please please please
Answers
While an elevator of mass 827 kg moves downward, the tension in the supporting cable is a constant 7730 N Between 0 and 400 s, the elevator's desplacement is 5. 00 m downward. What is the elevator's speed at 4. 00 m/s
Answers
According to the given statement , The elevator's speed can be determined using the concept of kinematic equations. Therefore, the elevator's speed at 4.00 m/s is 21.65 m/s.
The elevator's speed can be determined using the concept of kinematic equations. Given the elevator's mass of 827 kg, the tension in the cable of 7730 N, and the displacement of 5.00 m downward, we can find the elevator's speed at 4.00 s using the following steps:
1. Calculate the work done by the cable tension on the elevator:
- Work = Force * Displacement
- Work = 7730 N * 5.00 m
- Work = 38650 J
2. Use the work-energy theorem to relate the work done to the change in kinetic energy:
- Work = Change in Kinetic Energy
- Change in Kinetic Energy = 38650 J
3. Calculate the change in kinetic energy:
- Change in Kinetic Energy = (1/2) * Mass * (Final Velocity² - Initial Velocity²)
4. Assume the initial velocity is 0 m/s, as the elevator starts from rest.
5. Rearrange the equation to solve for the final velocity:
- Final Velocity² = (2 * Change in Kinetic Energy) / Mass
- Final Velocity² = (2 * 38650 J) / 827 kg
- Final Velocity² = 468.75 m²/s²
6. Take the square root of both sides to find the final velocity:
- Final Velocity = √(468.75 m²/s²)
- Final Velocity = 21.65 m/s
Therefore, the elevator's speed at 4.00 m/s is 21.65 m/s.
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given that the mass of 7.5 × 107 kg and her maximum cruising speed was 57 km/h, what would be the kinetic energy of the ship at maximum speed?
Answers
The spacecraft would have a kinetic energy of roughly 939.7116 × 10⁷ joules at its top speed.
To calculate the kinetic energy of an object, you can use the formula:
\(KE = \frac{1}{2} \cdot \text{mass} \cdot \text{velocity}^2\)
Given:
Mass of the ship = 7.5 × 10⁷ kg
Maximum cruising speed of the ship = 57 km/h
First, let's convert the maximum cruising speed from kilometers per hour (km/h) to meters per second (m/s), as the kinetic energy formula requires velocity in meters per second.
\(1 \, \text{km/h} = \frac{1000 \, \text{m}}{3600 \, \text{s}}\)
\(57 \, \text{km/h} = \frac{57 \times 1000 \, \text{m}}{3600 \, \text{s}} = 15.83 \, \text{m/s} \, (\text{approx.})\)
Now, we can plug the values into the kinetic energy formula:
\(KE = \frac{1}{2} \cdot \text{mass} \cdot \text{velocity}^2\)
\(KE = \frac{1}{2} \cdot (7.5 \times 10^7 \, \text{kg}) \cdot (15.83 \, \text{m/s})^2\)
Calculating the result:
\(KE = \frac{1}{2} \cdot 7.5 \times 10^7 \, \text{kg} \cdot (15.83 \, \text{m/s})^2\)
\(\approx \frac{1}{2} \cdot 7.5 \times 10^7 \, \text{kg} \cdot 250.9689 \, \text{m}^2/\text{s}^2\)
≈ 939.7116 × 10⁷ J
Therefore, the kinetic energy of the ship at its maximum speed would be approximately 939.7116 × 10⁷ joules.
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What is the difference between regular reflection and diffuse reflection?
Answers
Answer:
regular reflection occurs at the surface of a plane surface and diffuse reflection occurs at the surface of a rough surface
Gabriel is sledding down a snowy hill. At which of the following positions will Gabriel's potential energy be the least and his kinetic energy be the greatest?
A. 3
B. 2
C. 1
D. 4
Answers
Allison wants to calculate the denisty of a rock. To do this, what tools will she need to measure
the mass and volume of the rock?
Answers
Answer:
Explanation:
Allison can measure the mass of the rock by using a scale. An electronic beam balance will be able to give her the mass of the rock to a fairly accurate degree.
To go about measuring the volume of the rock, an indirect approach has to be adopted since the rock is not regular in shape. Allison would have to adopt a principle that explains that the volume a solid body displaces when immersed in a pool of liquid, is directly equal to the volume of the solid itself.
This means that if the stone is placed in a beaker of water containing an already measured volume of water, the increase in the volume of the water when the stone is immersed is equivalent to the volume of the stone.
what is the color that makes purple ?
ANSWER RED)BLUE
Answers
Answer:
both
Explanation:
really you don't know something from kindergarden