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A steel tank contains a large quantity of compressed air. When the tank is submerged for an hour in a cold-water tank, the air loses 245 J of heat to the water. What is the change in the internal e
A 1250kg is pulling a 325kg trailer. Together the car and trailer have an acceleration of 2.15m/s squared. Determine the net force on the car-trailer combination.
An outfielder throws a 0.150 kg baseball at a speed of 39.6 m/s and an initial angle of 34.0° What is the kinetic energy of the baseball at the highest point of its trajectory?
A pebble is dropped down a well and hits the water 1.1s later. Using the equations for motion with constant acceleration, determine the distance from the edge of the well to the water's surface.
A 62 kg boy and a 45 kg girl use an elastic rope while engaged in a tug-of-war on a frictionless icy surface. If the acceleration of the girl toward the boy is 3.3 m/s2, determine the magnitude of
Calculate the amount of work (in electron-volts) it would take to move an electron from 11.6 to 13.4 away from a +3.50 point charge.
Two identical loudspeakers are 3.2 m apart. A person stands 5 m from one speaker and 4.2 m from the other. What is the lowest frequency at which destructive interference will occur at this point? Th
Three resistors with a resistance of 12 ohms, 8 ohms, and 24 ohms are in a series circuit with a 12 volt battery.
A 140 g disk sits on a horizontally rotating turntable. The turntable makes exactly 3 revolutions each second. The disk is located 8 cm from the axis of rotation of the turntable.
A 394 kg mass is brought close to a second mass of 138 kg on a frictional surface with coefficient of friction 0.6. At what distance will the second mass begin to slide toward the first mass? The a
A light bulb with a resistance of 10.0 coulomb allows a 1.20 A current to flow when connected to a battery. (a)What is the voltage of the battery? (b) What is the power of the light bulb?
Consider a supertanker, with a mass of 2.4*10^8 kg. If it is pushed by a rocket motor (thrust force of 5.0*10^6 N) and is subject to no other forces, what will be the magnitude of its acceleration?
A dry cell does 7.5 J of work through chemical energy transfer 5.00 C between terminals of the cell. What is the electric potential between the two terminals?
A uniform meter stick is placed on and parallel to the x axis with the 50 cm mark at the origin. It is pivoted at the 50 cm mark. A 5.3 N force is applied at the 21 cm mark, and a (-7.0) N force is
A bird flies 5.00 m at 50.0° and then 3.00 m at -30.0°. What is the bird's total displacement in polar notation?
A 5.0m--long ladder has mass 12.5 and is leaning against a frictionless wall, making a 66 angle with the horizontal. If the coefficient of friction between the ladder and ground is 0.42, what is th
Create a coordinate system by making east the positive x axis, north the positive y axis, and altitude the z axis. An aircraft is approaching at an altitude of 5.0 km, a horizontal distance of 35 km
A 71.9-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.75 m/s2, (b) moving upward at a constant speed,
Without touching it, a magnet attracts the bolt so that it remains stationary, displaced horizontally 27.0 cm to the right from the previously vertical line of the string. Find the tension in the st
Five identical charges q = +3.0mC are arranged in a half-circle, each charge 45 degrees from the next. The radius of the circle r = 0.12m. A point charge of q0 = +1.0mC sits in the center of the ci
The charge q is replaced by a new charge, and now the +6.0mC charge feels a 9.2N force attracting it to the center of the square. What is the new unknown charge?
A physicist is arrested for running a red light. In court, he pleads that he approached the intersection at such a speed that the light looked green to him. The judge, having taken a couple physics
Water flows at 10 m/s through a pipe with a radius 0.030 m. The pipe goes up to the second floor of the building, 2.0 m higher, and the pressure remains unchanged. What is the radius of the pipe on
A wire carrying 8.0 A makes a 27 degree angle with a uniform magnetic field. The magnetic force per unit length of wire is 0.35 N/m What is the magnetic field strength
A 9.5 g bullet is accelerated in a rifle barrel 35.9 cm long to a speed of 458 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer