All categories

3 years ago

(PLEASE HELP FAST 20 POINTS)

1 answer:

4 0

Everything we see or do in everyday life that involves electricity in any way is the result of electrons moving from one place to another, or from one object to another. (last choice)

You might be interested in

A body of mass 3.0Kg is acted upon by a force of 24N, if the frictional force on the body is 13N.Calculate the acceleration of t

lisabon 2012 [21]

Answer:

Fnet=ma

24-13=3a

11/3=a

a=3.6m/s2

4 0

3 years ago

. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the. A child drops a ball from a windo

Vsevolod [243]

Answer:

30m/s

Explanation:

Use formula for height calculation: Time = √2h/√g
From here calculate height which comes out to be: 45m(if g is taken 10)
Then use formula for velocity calculation: v = √2gh

The velocity comes out to be 30m/s

3 0

3 years ago

Does a greater amount of force always result in a greater amount of work? Why or why not? Does moving an object a greater amount

Zina [86]

Thank you for posting your question here at brainly. I would say yes to the above question. Work done is the force applied multiplied by the distance travelled. Wd = F x d. So if d increases, Wd increases also. I hope the answer will help you.

5 0

3 years ago

Who exerts more pressure? a) A girl of 50 kg, wearing heels with an area of 1 cm2. b) An elephant of 4000 kg with foot area of 2

Mrrafil [7]

Answer:

The girl exerts more pressure.

Explanation:

Pressure can be defined as the force exerted normally or perpendicularly per unit area.

i.e P = F/A

Girls

Area of the heel = 1cm² = 10^(-4) m²

Force = mg = 50 × 10 = 500N

Pressure =

$\frac{500}{10 ^{ - 4} }$

$= 5 \times {10}^{6}$

Elephant

Area = 250cm² = 2.5 x 10^(-2)b m²

Force = mg = 40000N

Pressure =

$\frac{40000}{2.5 \times {10}^{ - 2} }$

$= 1.6 \times {10}^{6}$

5 0

3 years ago

the first law of thermodynamics states that (triangle)E= Q-W. is this also a statement of the principle of conservation energy

Verdich [7]

Yes, the first law of thermodynamics was created using the law of conservation of energy that is applied in a thermodynamic systems.the first law of thermodynamics is the change in internal energy of an isolated system is equal to the amount of heat (Q) added to the system minus the work (w) done by the system to the surroundings . while the law of conservation of energy states that in an isolated system that energy is constant, and energy can change its form but it cannot be created or destroyed.

7 0

3 years ago