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If a four-engine jet accelerates down the runway at 2 m/s2 and one of the jet engines fails, how much acceleration will the other three produce?
If the spring in such a setup is compressed by 0.051 m, what is the coefficient of static friction?
A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was 2.0 104 Bq, what is its activity (R) after it has been on the shelf for 2.0 h?
Give a counter example to show that the following statement is false: When the magnetic field through a loop changes, currents run in the loop in such a way as to make a new magnetic field in the op
A 64 kg boy and a 40 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 2.9 m/s2, determine the magnitude of
A block or aluminum with a mass of 1 kg is placed in a container filled with water to the brim. The water oerflows. The same is dont with a 1 kg of lead. Does the block of lead displace more, less
A 8.3 kg stone at rest on a spring. The spring is compressed 11 cm by the stone. The stone is then pushed down an additional 26 cm and released. To what maximum height (in cm) does the stone rise f
A 90 kg airplane pilot pulls out of a dive by following, at constant speed, the arc of a circle whose radius is 330 m. The acceleration of gravity is 9.81 m/s2 . At the bottom of the circle, where
What is the tangential acceleration of a bug on the rim of a 7.0 in. diameter disk if the disk moves from rest to an angular speed of 76 revolutions per minute in 4.0 s?
A ceiling fan with 85cm diameter blades is turning at 62rpm. Suppose the fan coasts to a stop 29s after being turned off. 1. What is the speed of the tip of a blade 10s after the fan is turned off?
A spring with k = 45 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.7 kg mass is now attached to the end of the spring, where will the en
A 108 kg water skier floating in a lake is pulled from rest to a speed of 11 m/s in a distance of 25 m. What is the net force exerted on the skier, assuming his acceleration is constant?
A ferris wheel with a radius of 8.0 m rotates at a constant rate, completing one revolution in 30.0 s. what is the apparent wight of a 60.0-kg passenger when she is at the top of the wheel?
The wind exerts a force of 239 N North on a sailboat, while the water exerts a force of 167 N West on the sailboat. What is the magnitude of the net external force on the sailboat?
A constant force of magnitude F moves an object at constant speed v in the direction of the force. Deduce that the power P required to maintain constant speed is given by the express P = Fv.
How much heat is required to vaporize a(n) 2 g ice cube initially at 0?C? The latent heat of fusion of ice is 80 cal/g and the latent heat of vaporization of water is 540 cal/g. The specific heat of
A fully loaded Volvo station wagon has a mass of 2000 kg. If each of its four tires is inflated to a gauge pressure of 215 kPa, what is the total tire area in contact with the road?
A small ball of mass 81 g is suspended from a string of length 26 cm and whirled in a circle lying in the horizontal plane. If the string makes an angle of 23? with the vertical, find the centripet
Two lifeguards pull on ropes attached to a raft. If they pull in the same direction, the raft experiences a net external force of 320 N to the right. If they pull in opposite directions, the raft e
A gas is compressed at a constant pressure of 0.836 atm from 6.34 L to 4.3 L. In the process, 550 J of energy leaves the gas by heat. What is the work done on the gas?
A 16 g rifle bullet traveling 215 m/s buries itself in a 3.4 kg pendulum hanging on a 2.9 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the p
A railroad car with a mass of 2.00 * 10^4kg is moving at 3.00m/s, each with the same mass as the single car and initially moving in the same direction at 1.2 m/s. what is the decrease in kinetic en
An object weighing 300 N in air is immersed in water after being tied to a string connected to a balance. The scale now reads 265 N. Immersed in oil, the object appears to weigh 275 N. Find (a) the
What is the maximum speed with which a 1180 kg car can round a turn of radius 75 m on a flat road if the coefficient of static friction between tires and road is 0.80?
A 1500- car drives at 30 around a flat circular track 300 in diameter. What are the magnitude and direction of the net force on the car?