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3 years ago

NEED HELP ASAP!!!!!!!!!!

Physics

1 answer:

stepan [7]3 years ago

3 0

Answer:

*The same balloon put into the freezer would be smaller and shriveled.

* The volume decreases as the temperature decreases.

* using a hypothetical starting volume of 2 liters in the balloon at 42 degrees Celsius, we can use the equation V1/T1 =V2/T2

V2= 1.54 liters which proves when temperature decreases , volume decreases as well.

Explanation:

The volume increases as the temperature increases, and volume decreases as the temperature decreases.

using a hypothetical starting volume of 2 liters in the balloon at 42 degrees Celsius, we can use the equation V1/T1 =V2/T2

Change Celsius to kelvin by adding 273.

2 liters/ 315 K = V2/243 K

Cross multiply and then divide by 315 to find V2

2 liters x 243 K / 315 K = V2

The Kelvin cancels itself out.

486 liters /315=V2

V2= 1.54 liters.

This proves that when the temperature decreases , so does the volume.

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4vir4ik [10]

Answer:

B. The force would be the same in both cases.

Explanation:

According to Newton's 3rd law where impulse was equated to the momentum formula.

F × t = M × V

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Since, Impulse is force multiplied by time, whereas the time of contact is the same for both, therefore the impulse is the same in magnitude for the two trucks.

Case 1: Hitting the other car

Case 2: Hitting the brick wall

In Case 1, both the cars are identical and have same velocity whereas in the Case 2, the wall is stationary.

The case of hitting the brick wall have the same impact force as hitting the other car, because they have the same change in momentum.

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4 years ago

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irina1246 [14]

Answer:

F = 10.86 units

Explanation:

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F = √(Fₓ² + Fy²)

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3 years ago

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3 years ago

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rewona [7]

Clara is jogging faster during part C of her run.

<h3 />

<h3>What is average velocity?</h3>

The average velocity of an object is the change in the object's displacement per change in the time of motion.

From the graph of Clara's motion, the average velocity of Clara in part A is calculated as follows;

$v = \frac{\Delta x}{\Delta t} = \frac{x_2 \ - \ x_1}{t_2 \ - \ t_1} \\\\
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The average velocity of Clara in part C is calculated as follows;

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Thus, we can conclude that Clara is jogging faster during part C of her run.

Learn more about average velocity here: brainly.com/question/6504879

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3 years ago

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Paul [167]

Answer:

There is a constant emf induced in the loop.

Explanation:

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