The ultimate source of energy that powers the sun is the Mass energy of hydrogen fusing into helium, there is no other process than the annihilation of mass to give energy that has been advocated by Albert Einstein and it is capable of keeping the sun alive.
Answer:
efficiency of engine is 0.21
Explanation:
given:
Th=980 K
Tc=570 K
since efficiency of engine is given as:
n=3/5*n_m
=3/5(1-Tc/Th)
=0.21
efficiency of engine is 0.21
Hello!
A 1350 kg car travels at 12 m/s. What is it's kinetic energy ?
We have the following data:
m (mass) = 1350 kg
v (velocity) = 12 m/s
KE (kinetic Energy) = ? (in Joule)
Formula to calculate kinetic energy:

Solving:





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Answer:
the sodium atom and the chlorine atoms share electrons to form ionic bonds
Answer:
2.15 m
Explanation:
Newton's Law of Universal Gravitation:
is the gravitational force of attraction
is the universal gravitational constant
and
are the two masses of the two objects
is the distance between the centers of the two objects.
List the known values:
Plug these values into the equation:
Notice that the units
,
, and
cancel out. We are left with the unit
for radius r.
Get rid of the units to make the problem easier to read.
Multiply the masses together.
Multiply the gravitational constant and the masses together.
Solve for
by dividing both sides by 3.47 * 10^(-8) and moving
to the left.
Take the square root of both sides.
The students are sitting about 2.15 m apart from each other.