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A 94 kg man lying on a surface of negligible friction shoves a 74 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result?
A person with perfect pitch sits on a bus bench listening to the 441-Hz horn of an approaching car. If the person detects a frequency of 479 Hz, how fast is the car moving?
Determine the ratio of the relativistic kinetic energy to the nonrelativistic kinetic energy (1/2mv2) when a particle has a speed of (a) 1.54 x 10-3c. and (b) 0.841c.
A woman is 1.7 m tall and has a mass of 68 kg. She moves past an observer with the direction of the motion parallel to her height. The observer measures her relativistic momentum to have a magnitud
The resistance of each of the three identical bulbs, by R. Determine the power in bulb1 and in bulb2. Denote the pair of the powers as: [P1, P2]?
a cannonball shot with an initial velocity of 141 m/s at an angle of 45 follows a parabolic path and hits a balloon at the top of its trajectory. neglecting air resistance, what is the speed of the
The electrical force on a pair of charges is 60N. IF those same charges are moved to double the distance away from each other, what is the new electrical force on the pair of charges?
A 7.8 g bullet is accelerated in a rifle barrel 115 cm long to a speed of 590 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated.
If a car of mass 1000 kg is moving along a highway at 92 km/h, what is the car's kinetic energy as determined by someone standing alongside the highway?
The locations marked by "x" and labeled by a letter are in the interior of the wire. How many electrons per second enter the positive end of the battery 2? Answer in units of electrons/s.
The wire is wound onto a cardboard tube in a single layer, with adjacent turns touching each other. What power must be delivered to the solenoid if it is to produce a field of 7.80 mT at its center?
A shotputter accelerates a 7.3kg shot from rest to 14m/s. If this motion takes 1.5s, what average power was developed?
A 3.00kg mass resting on a level table top is pulled alond by a horizontal force of 16.0N and accelerates at 4.00 meters per second per second. what is the force of friction between the block and t
An ancient club is found that contains 120 g of pure carbon and has an activity of 7 decays per second. Determine its age assuming that in living trees the ratio of 14C/12C atoms is about 1.1x10-12.
In New England, the horizontal component of the Earth's magnetic field has a magnitude of 1.4 x 10-5 T. An electron is shot vertically straight up from the ground with a speed of 3.9 x 106 m/s. Wha
Planet Z is 9,000 km in diameter. The acceleration due to gravity on Planet Z is 8.5 m/s2. What is the mass of Planet Z?
sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 m/s. What is the difference in time that the message is received?
Consider a refracting telescope. If it has an objective lens with fobj = 1.8 m and an eyepiece with feyepiece = 2.9 cm, what is the angular magnification of the telescope?
An air puck of mass 0.273 kg is tied to a string and allowed to revolve in a circle of radius 0.85 m on a horizontal, frictionless table. The other end of the string passes through a hole in the cen
High-speed stroboscopic photographs show that the head of a 270 g golf club is traveling at 55 m/s just before it strikes a 46 g golf ball at rest on a tee. After the collision, the club head travel
What is the variation of pressure in the sound wave if the speed of sound is 343 m/s and the density of air is 1.2 kg/m3?
We observe two charges separated by a distance of 1.00 meters. If the distance between the two charges is changed to be half what it was, by what factor would the electric force of between them be c
A nurse uses the syringe to inject medicine into a patient whose blood pressure is 140/100. What is the minimum force the nurse needs to apply to the syringe? The nurse empties the syringe in 2.70 s
A 40 cm diameter wheel accelerates uniformly from 240 rpm to 360 rpm in 6.5 s. how far will a point on the edge of the wheel have traveled in this time?
What are the forces on two charges of +0.43 C and +2.0 C, respectively, if they are separated by a distance of 1.6 m