Answer:
W(fric) = -12000 J
Explanation:
Given that
mass ,m= 80 kg
Initial speed ,u= 0 m/s
Height ,h= 15 m
Final speed ,v= 0 m/s
We know that
Work done by all the forces = Change in the kinetic energy
W(fric)= - m g h
W(fric) = - 80 x 10 x 15 ( g=10 m/s²)
W(fric) = -12000 J
negative sign indicates that force and displacement is in opposite direction.
Answer:
A. increase the speed
Explanation:
For you to be able to shorten the time it takes for the care to get to its destination, you must increase the speed because if the distance is the same that means you have to increase your speed.
Elastic Potential Energy because the elasticity in the string stores up the energy.
The equation formula:
P V = n R T
1,245 * 2 l = n R * 300 K
n R = 1,245 * 2 : 300 = 8.3
P * 2.5 l = n R * 400 K
P * 2.5 = 8.3 * 400
P = 3,320 : 2.5 = 1328 J
Answer: A ) 1,328 joules.
Hey there! :D
Cluster- a group of stars or galaxies forming a relatively close association.
<span>Constellation- A group of stars that makes a shape, and has a name that is well known.
</span>
<span /><span>Solar system- a system of planets revolving around a center, or sun.
</span>
Universe- the whole wide range of galaxies, stars, and solar systems that were ever formed.
The best answer would be "Cluster" because the universe is infinite, they are millions of galaxies, solar systems, and constellations in it. The question only states 'a thousand galaxies'. This is of one kind. This best works for the question.
I hope this helps!
~kaikers
