6. A girl pushes her little brother on his sled with a force of 300 N for 750 m.

Which of the following choices defines energy in scientific terms?

snow_tiger [21]

1) B. Energy is the ability to do work

2) C. Energy is conserved, it just goes from one form to another.

3) Work = Force x displacement
= 300 x 100 = 30,000 Joules

4) leaning a brick because no displacement is taking place.

5) They change the amount/strength or direction of the force needed.

6) Less force is needed and applied over a longer distance.

7) Heat is the flow of thermal energy from one object to another.

8 0

3 years ago

Read 2 more answers

2 m3 of an ideal gas are compressed from 100 kPa to 200 kPa. As a result of the process, the internal energy of the gas increase

rosijanka [135]

Answer:

work done is -150 kJ

Explanation:

given data

volume v1 = 2 m³

pressure p1 = 100 kPa

pressure p2 = 200 kPa

internal energy = 10 kJ

heat is transferred = 150 kJ

solution

we know from 1st law of thermodynamic is

Q = du +W ............1

put here value and we get

-140 = 10 + W

W = -150 kJ

as here work done is -ve so we can say work is being done on system

3 0

3 years ago

Identical isolated conducting spheres 1 and 2 have equal charges and are separated by a distance that is large compared with the

scoundrel [369]

Answer:

F = 0.1575 N

Explanation:

When the third sphere touches the first sphere, the charge is distributed between both spheres, then now the first sphere has only half of his original charge.

In this moment then

Sphere one has a charge = Q/2

Sphere three has a charge = Q/2

Now when the third sphere touches the second sphere again the charge is distributed in a manner that both sphere has the same charge.

How the total charge is Q = Q/2 + Q = 3/2Q, when the spheres are separated each one has 3/4Q

Sphere two has a charge = 3/4Q

Sphere three has a charge = 3/4Q

The electrostatic force that acts on sphere 2 due to sphere 1 is:

F = $\frac{kQ_{1}Q_{2} }{r^{2} }$

F= $\frac{K(Q/2)(3Q/4)}{r^{2} }$

how $\frac{KQ^{2} }{r^{2} }$ = 0.42

Then

F = $\frac{0.42*3}{8}$

F = 0.1575 N

3 0

3 years ago

A coaxial cable is 10 meters long, and is filled with lossless Teflon, having a relative permittivity of 2.1. There is a matched

sattari [20]

My milkshake brings all the boys to the yard

And they're like, it's better than yours

Dam right it's better than yours

I can teach you, but I have to charge

My milkshake brings all the boys to the yard

And they're like, it's better than yours

Dam right it's better than yours

I can teach you, but I have to charge

I know you want it

The thing that makes me

What the guys go crazy for

They lose their minds

The way I wind

I think it's time

La la, la la, la

Warm it up

La la, la la, la

The boys are waiting

La la, la la, la

Warm it up

La la, la la, la

The boys are waiting

My milkshake brings all the boys to the yard

And they're like, it's better than yours

Dam right it's better than yours

I can teach you, but I have to charge

My milkshake brings all the boys to the yard…

6 0

3 years ago

A carbon-12 atom has 6 protons, 6 neutrons, and 6 electrons. How many protons does a carbon-14 atom have?

jenyasd209 [6]

Carbon-14 atom have 6 protons plus 8 neutrons.

Explanation

Carbon-12 and Carbon-14 are examples of isotopes of carbon that have huge applications in the field of science.

Isotopes are those elements who have equal number of protons and electrons whereas their neutrons differ.

Therefore isotopes have same atomic number, as atomic number depends on number of protons or number of electrons whereas number of neutrons do not have a role in atomic number.

But mass numbers of isotopes are different as mass numbers depend on the number of protons and number of electrons.

6 0

3 years ago