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3 years ago

The internal energy of a material is determined by

Physics

2 answers:

vazorg [7]3 years ago

8 0

The combined amount of kinetic and potential energy of its molecules

Murrr4er [49]3 years ago

3 0

Answer:

Explanation:

The internal energy of any material is calculated as the sum of kinetic and potential energy of randomly distributed molecules.

This energy depends on temperature as well, if the temperature will increase the randomness will also increase hence will be the internal energy.

If any work is done on the system, then also the internal energy of the system is increased.

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Three cars (car F, car G, and car H) are moving with the same speed and slam on their brakes. The most massive car is car F, and

Crazy boy [7]

To solve this problem it is necessary to apply the concepts related to Normal Force, frictional force, kinematic equations of motion and Newton's second law.

From the kinematic equations of motion we know that the relationship of acceleration, velocity and distance is given by

$v_f^2=v_i^2+2ax$

Where,

$v_f =$ Final velocity

$v_i =$ Initial Velocity

a = Acceleration

x = Displacement

Acceleration can be expressed in terms of the drag coefficient by means of

$F_f = \mu_k (mg) \rightarrow$ Frictional Force

$F = ma \rightarrow$ Force by Newton's second Law

Where,

m = mass

a= acceleration

$\mu_k =$ Kinetic frictional coefficient

g = Gravity

Equating both equation we have that

$F_f = F$

$\mu_k mg=ma$

$a = \mu_k g$

Therefore,

$v_f^2=v_i^2+2ax$

$0=v_i^2+2(\mu_k g)x$

Re-arrange to find x,

$x = \frac{v_i^2}{2(-\mu_k g)}$

The distance traveled by the car depends on the coefficient of kinetic friction, acceleration due to gravity and initial velocity, therefore the three cars will stop at the same distance.

3 0

3 years ago

Mr. Rudman drives his race car for 4 hrs at 150 miles/hr. How far will he travel?

Lilit [14]

150*4=600
So the answer is 600

7 0

3 years ago

Please help me with my quiz

Oduvanchick [21]

Answer:

matter: A

data: E