An unbalanced force of 20 N acting on an object produces on it an acceleration of 4 m/s2. What is the mass of the object?

Which of the following is NOT true of freely falling objects?

Which of the following is true about one calorie of heat?

J/kg is the unit for measuring

What is the potential energy of a 1.5 kg hammer raised to a height of 2.2 m?

A reference frame can best be defined as

A given space can be saturated by:

One kilowatt multiplied by one hour is called:

If a moving object changes its position from x = 5 m to x = -10 m, it can be assumed that:

Which of the following is the correct relation between temperature in the Celsius scale and temperature in the Kelvin scale? (i)     0o C =  –273 K  (ii)    0o C =  273 K  (iii)  0 K = 273o C  (iv)  0 K = -273o C