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Advocard [28]
4 years ago
9

50 J of work was performed in 20 seconds. How much power was used to do this task?

Physics
2 answers:
dezoksy [38]4 years ago
8 0
I would go with 2.5 because all you do is divide 50 and 20 

That would give you 2.5 :) 
nordsb [41]4 years ago
5 0
Power is the measurement of work.. you can find power by dividing work by time, so you have P=50J/20s leading to 2.5 J of power being used.
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How can you tell if something has a lot of kinetic energy? How can you tell if something only has a little bit of kinetic energy
dezoksy [38]

Based on the equation KE = 1/2(m)(v^2), Kinetic Energy can be measured based on velocity. If an object has a large velocity, it have a larger kinetic energy than if the velocity is small.

Hope this helps.

If this helped you, please vote me as brainliest!

3 0
4 years ago
Compare the gravity between these pairs, each consisting of an Earth-like planet and its star. You are given the mass of the pla
Maru [420]

Answer:

The answer is below

Explanation:

Newton's law of gravity states that the force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. The law is expressed by the formula:

F=G\frac{m_1m_2}{r^2} \\\\Where\ F=force,G=gravitational\ constant, m_1\ and\ m_1=mass\ of\ objects,r\ =distance\ between \ the\ two\ objects.

The masses and distances for this question is in common units, Therefore the result would be in ratios

a) 4 MEarth / 2 MSolar / 3 AU

The force (F) = (4 * 3) / 3² = 4/3

b) 1 MEarth / 1 MSolar / 1 AU

The force (F) = (1 * 1) / 1² = 1

c) 1 MEarth / 2 MSolar / 2 AU

The force (F) = (1 * 2) / 2² = 1/2

6 0
3 years ago
Can someone help me with this science question
Anettt [7]
Mechanical layers of the earth:

-Lithosphere
-Asthenosphere
-Mesosphere
-Outer Core
-Inner Core


Chemical layers of the earth:

-Crust
-Mantle
-Core



Hope this helps

Have a great weekend! :)
6 0
3 years ago
Read 2 more answers
While driving, which of the following principles should be used to keep the appropriate distance between your vehicle and the ve
Alex787 [66]
 The correct answer for this question is "Two-car length rule." While driving, the principle that you should be used to keep the appropriate distance between your vehicle and the vehicle in front of you is to follow the <span>Two-car length rule. This rule is to be followed for safety.</span>
5 0
3 years ago
Two large parallel metal plates are 1.6 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces
Flauer [41]

Answer:

787.5 V/m

Explanation:

the formula to find the electric field in the region between the plates is

E = V/d

where

V=the voltage supplied by the battery (potential)

d=distance between the plates.

E=electric field

Given:

V= 6.3 V

d= 1.6cm/2=> 0.016m/2

E= V/d=> 6.3/(0.016/2)

E= 787.5 V/m

Therefore, the electric field in the region between the plates is 787.5 V/m

7 0
3 years ago
Read 2 more answers
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