NUFYP physics

A net force FA acts on object A, and a net force FB acts on object B. The mass of object B is twice the mass of object A, and the acceleration of object B is twice that of object A. Which of the following is true of forces F_A and F_B?

You have two objects. One object weighs 50 N on the Moon. One object weighs 50 N on Earth. Which object would have the greatest mass?

Two objects sliding on a frictionless surface, as represented above, collide and stick together. How much kinetic energy is converted to heat during the collision?

Sound waves transfer their energy parallel to their movement of compressions and rarefactions. What kind of a wave is a sound wave?

Two simple pendulums A and B consist of identical masses suspended from strings of length L_A and L_B respectively. The two pendulums oscillate in equal gravitational fields. If the period of pendulum B is twice the period of pendulum A, which of the following is true of the lengths of the two pendulums?

What is the formulaic relationship between Q, C, m and ΔT, where Q is the amount of heat transferred to an object C is the specific heat of that object m is the mass of the object and ΔT is the change in temperature?

For the circuit shown in the figure, what is the current i through the 2 Ω resistor?

The following equation approximates the speed of sound:

v=[331.4+(0.6)(T in °C)] m/s

As shown, temperature is one of the factors that affects the speed of sound. What is the speed of a sound wave in air with an average temperature of 20ºC?

For which of the following thermodynamic processes is the increase in the internal energy of an ideal gas equal to the heat added to the gas?

A force applied to a body is said to do «work»

Electromagnetic radiation emitted from a nucleus is most likely to be in the form of

What occurs when the angle of incidence of a light ray is greater than the critical angle?

For an ideal gas, consider the three thermodynamic processes – labeled 1, 2, and 3 – shown in the PV diagram. Each process has the same initial state and the same final volume. One process is adiabatic, one is isobaric, and one is isothermal. Which of the following correctly identifies the three processes?

A system’s internal energy is 20 Joules. 30 Joules of work is done on the system in an adiabatic process. What is the system’s resultant internal energy?

The figure above shows three arrangements of one electron e and two protons p. Which of the following is true about the magnitude F of the net electrostatic force acting on the electron due to the protons?

In the equation for the ideal gas law, PV=nRT, which is the universal gas constant?

An airplane drops a payload while travelling due north parallel to the ground, at a constant speed of 100 m/s. If air resistance is neglected, what is the velocity of the payload relative to the plane 4.0 s after it is released? (g = 10 m/s²)

According to the second law of thermodynamics, heat energy cannot be completely converted into useful work owing to

In which of the following states of matter would you find the strongest attractive forces?

Light travels through all transparent media at the same speed.