All categories

4 years ago

The energy associated with the random motion of molecules or atoms within a substance is

Physics

1 answer:

Yuliya22 [10]4 years ago

6 0

Answer:

technically B too but youre teachers not that smart so there you go

You might be interested in

The IMA is always smaller than the AMA. True False

VMariaS [17]

Best answer must be false. Because the IMA it doesn't have always stay smaller than the AMA. Hope it helped you!

6 0

4 years ago

The 5-lb collar is released from rest at A and travels along the frictionless guide. Determine the speed of the collar when it s

Sholpan [36]

Answer:

Explanation:

Stiffness of spring k equal to 4 lb/ft.

Unstretched length of the spring L is equal to 0.5 feet.

Weight of the collar W is 15lb

Radius of curvature of curve guide is 1 feet

length of vertical rod is 1.5 feet

Initial speed of collar when released from rest at A is 0 feet per seconds

use the energy conservation equation

$P_A +K_A=P_B+K_B$

Estimate the potential energy , component as position B as below

$P_A=Wh_1+\frac{1}{2} ks^2_1\\\\=5\times(1.5+1)+\frac{1}{2} \times 4 \times(1.5+1-0.5)^2\\\\=20.5lb.ft$

Estimate the kinetic energy , component as position A as below

$K_A=\frac{1}{2} \frac{W}{g} V^2_1\\\\=\frac{1}{2} \frac{5}{32.2} \times0^2\\\\=0lb.ft$

Estimate the kinetic energy , component as position B as below

$K_A=\frac{1}{2} \frac{W}{g} V^2_2\\\\=\frac{1}{2} \frac{5}{32.2} \times V^2_2\\\\=00777V^2_2$

Substitute 20.5lb- ft for $P_A$

0.5lb-ft for $P_B$

0lb -ft for $K_A$

$0.0777V_2^2 for K_B$

$20.5+0=0.5+0.777V^2_2\\\\V^2_2=257.6\\\\V_2=16.05$

= 16.05ft/sec

7 0

3 years ago

Fill in the blanks to the statement below in the next three questions: A train composed of a small engine car and a massive carg

Assoli18 [71]

Answer:

1) is equal to, 2) is equal to, connected and moving along the same track.

Explanation:

1) The speed of the small engine car is equal to the speed of the massive cargo car.

2) The magnitude of the acceleration of the small engine car is equal to the magnitude of the acceleration of massive cargo car because they are connected and moving along the same track.

3 0

4 years ago

What is an uncharged body? In physics (simple words)

andriy [413]

An uncharged body is a body that has equal magnitude of positive as well as negative charge on it. So as soon as some charged body is placed near it, the charged body induces negative charges on the uncharged body.

4 0

3 years ago

Let f be the function that determines the area of a circle (in square cm) that has a radius of r cm. That is, f ( r ) represents

emmasim [6.3K]

Answer:

$f(r)=\pi.r^2\\f(4.3)=58.09\ cm^2$

Explanation:

Functions

When one magnitude depends on other (or others), we usually try to express them as a function which can contain any number of variables, constants, and operations.

The area of a circle is computed by the well-known formula

$A=\pi r^2$

We are required to use function notation to express the area of a circle f(r) in terms of the radius r. If the radius is in cm, then the area is in $cm^2$ .

The required function is

$f(r)=\pi r^2$

For a radius of 4.3 cm:

$f(4.3)=\pi\times 4.3^2=58.09\ cm^2$

$\boxed{f(4.3)=58.09\ cm^2}$

4 0

3 years ago