Answer:
<h3>25.0 grams is the mass of the steel bar.</h3>Explanation:
Heat gained by steel bar will be equal to heat lost by the water
Mass of steel=
Specific heat capacity of steel =
Initial temperature of the steel =
Final temperature of the steel =
Mass of water=
Specific heat capacity of water=
Initial temperature of the water =
Final temperature of water =
On substituting all values:
Answer:
(b). Mass and distance.
Explanation:
The gravitational force between two objects is given by Newton's law of universal gravitation. The formula is as follows :
Here,
G is universal gravitational constant
r is the distance between two objects
It is very clear that the gravitational force is directly proportional to the product of masses and inversely proportional to the square of the distance between them.
Hence, the two quantities are used to predict gravitational force according to Newton's law of universal gravitation are mass and distance.