Barron's Book 70) This question asks us to find the theoretical efficiency of a heat engine operating between 100°C and 500°C. This means...

Barron's Book 51) This question asks us to find the circuit which will have the brightest bulbs. The brightness of the bulbs is...

Barron's Book 68) This problem asks us to find the internal energy and the work done on a gas during an isothermal process. The problem...

Barron's Book 67) This question asks us the amount of heat needed to raise the temperature of a liquid. Since it is told that the...

Barron's Book 65) This question asks us to consider the effects on the temperature of a gas when the pressure and volume are changed. We...

Barron's Book 62) This question goes over Young's double-slit experiment and asks us which answer choice(s) will decrease the spacing...

Barron's Book 59) This problem asks us to describe the resulting image when the object is placed in front of a converging convex lens as...

Barron's Book 58) We know that the guitar string creates a wave of wavelength λ and fundamental frequency f[1]. Now we want to find the...

Barron's Book 53) The question asks us to find the induced electromotive force in the situation shown in the question. Using Faraday's...

Barron's Book 52) This question asks us to find the direction of the magnetic force acting on the object just as it enters the magnetic...

Barron's Book 50) This question asks us to find the power dissipated by R[3], the 1 Ohm resistor. Question 50 is a continuation of...

Barron's Book 49) This question wants us to find the voltage drop through the 1 Ohm resistor. If we refer back to question 48, we can...

Barron's Book 48) This question asks us to find the current through the 1 Ohm resistor. For simple DC circuits, the total current is the...

Barron's Book 46) This question asks us to find the electric potential at the origin. To do so, we can use this formula. We need to...

Barron's Book 43) This question asks us to determine what happens to the acceleration of gravity as we move 2 Earth radii away from the...

Barron's Book 42) For this question, we are given a situation where a mass is orbiting Earth. We need to find the affects of tripling the...

Barron's Book 41) For this question, we want to find the speed of the block of mass m. If we use the conservation of momentum, this...

Barron's Book 39) This question asks us to find the magnitude of the force applied for 5 seconds required to change the speed of the car...

Barron's Book 38) This question requires us to find the maximum speed of the mass after the spring accelerates it. Friction is not...

Barron's Book 37) Question 37 asks us to find the power when the mass is moved up the incline at the constant speed. The problem relates...

Barron's Book 36) This question asks us to determine the work done by the force F. There are multiple ways we can do this problem. Let’s...

Barron's Book 35) This problem asks us to find the force acting on the 2kg block as it moves up the frictionless incline with a constant...

Barron's Book 34) This question poses us with a situation where a car is kept in circular motion by the friction between it and the road....

Barron's Book 31) This question, a lot like question 30, asks us to find the speed needed at the top of the loop to continue in circular...

Barron's Book 30) This question asks us to find the speed of the mass at the lowest point of the circle. The object travels in circular...

Barron's Book 28) This problem asks us to find the apparent weight of the astronaut. When a question asks for the apparent weight, it is...

Barron's Book 27) This problem gives us a force diagram. We are told two of the forces and we know that the mass remains at rest. I would...

Barron's Book 24) The problem asks us tor find the tension in the string. If the mass m is held stationary, the net force must be 0. Our...

Barron's Book 23) This problem wants us to find the net acceleration of the 5-kilogram mass. To simplify the problem, we can draw out a...

Barron's Book 19) This question asks us the distance the boat drifts downstream by the time it reaches the other side of the river....

Barron's Book 17) This problem requires us to identify and use the respective kinematic equations. We are given the initial velocity, the...

Barron's Book 16) This problem asks us the effect on the maximum height of a projectile if its speed is doubled. We are first told that...

Kaplan's Book 74) This problem is a continuation of Question 73. In this question, we simply need to determine the direction of the...

Kaplan's Book 73) Problem 73 asks us to consider the answer choices and choose the true choice. We are given the situation of a ball in a...

Kaplan's Book 65) This question asks us to describe the resulting motion of the ball if the bus accelerates when the ball is thrown...

Kaplan's Book 54) This question asks us to find the impulse (change in momentum) of the ball after hitting the wall. First, it is crucial...

Kaplan's Book 49) This question simply requires us to use Newton's 2nd Law to find the net acceleration of the railroad car. We know that...

Kaplan's Book 48) This problem asks us to find the tension in each rope between the horse and the railroad car. The diagram shows us that...

Kaplan's Book 46) This question is a continuation from Question 45. We need to find the heat required to raise the substance from 0°C to...

Kaplan's Book 45) This question asks us to find the heat required to melt the ice. Firstly, it is important to realize that the block of...

Kaplan's Book 43) This question simply asks us to find the speed of the standing wave. There is a simple formula for waves to help us...

Kaplan's Book 42) In this problem, we are asked to find the magnitude of the charge given the magnetic field magnitude, the charge's...

Kaplan's Book 41) The problem asks us what will happen if we take away the positively charged rod after grounding the electroscope. We...

Kaplan's Book 40) This question asks us to consider the reaction by the leaves of the electroscope. The problem tells us that the...

Kaplan's Book 39) This question asks us to find the energy used in three minutes by a 2,400-watt microwave. This question requires us to...

Kaplan's Book 34) This problem is very simple. The problem asks us to find the relation between the voltage across the 1 Ohm and 2 Ohm...

Kaplan's Book 33) This question asks us to compare the current through the 1 and 2 Ohm resistors, which we will call R[1] and R[2]. The...

Kaplan's Book 32) This problem asks us to validate the answer choices and choose the best answer. We are told that the mass of blocks A...

Kaplan's Book 31) This problem asks us to solve for an estimation of the magnetic force acting on the electron. In order for the electron...

Kaplan's Book 28) We are told that Pluto has an elliptical orbit about the Sun. This question is asking us to find the true statement....