Answer:
The dog has more momentum than the pony.
Explanation:
To solve this problem, we must remember the formula for calculating momentum, which is given below:
momentum = p = m*v
where m represents the mass of the object and v represents the velocity of the object
Using this knowledge, let's calculate the momentum for the dog and the pony.
Dog: p = m*v = (2kg)*(41 m/s) = 82 kg*m/s
Pony: p = m*v = (75kg)*(1 m/s) = 75 kg*m/s
Since 82 > 75, we can conclude that the dog has more momentum.
Hope this helps!
Answer: D. Water.
Explanation: Among liquids, water has highest heat capacity (4.18 kJ/Kg.K) but hydrogen has highest (14.3 kJ/Kg.K) heat capacity of all.
Answer: Dependent Variable
Explanation:
There are two types of variable in any kind of experiment:
Independent Variable which are mostly known as inputs
Dependent Variables which are mostly known as outputs
In any experiment, the researches focus on observing the output values (dependent variables) by intentionally changing the inputs (Independent variables).
e.g. If we are observing the strain on any object, we try to change the value of stress on that particular object.
Here strain is a dependent variable whereas stress is an independent variable because it doesn't depend on whatever the value of strain may be.
Answer:
A. Thermal energy;
Thermal energy is energy that comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature.
Answer:

Explanation:
Given,
After two revolutions, angular speed = 0.5 rev/s
Angular speed after 8 revolution = ?
Using equation of circular motion



Now, Angular speed after 8 revolution



Hence, the angular speed after 8 revolution is equal to 1 rad/s.