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A 29 g ice cube at 0 C is placed in 805 g of water at 89 C. What is the final temperature of the mixture? The specific heat of water 4186 J/kg C and latent
A rocket fires from rest with an upward acceleration of 25 m/s2 for 1 seconds. Determine the height of the rocket when the engines shut off
A steel wire in a piano has a length of 0.6000 m and a mass of 4.500 10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6
Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
A 126 kg fullback is running at 3.84 m/s to the east and is stopped in 0.700 s by a head-on tackle by a tackler running due west. Calculate the impulse exerted on the fullback. Calculate the impulse
A hunter aims directly at a target (on the same level) 111m away. If the bullet leaves the gun at a speed of 221m/s, by how much will it miss the target?
An ice skater is spinning at 20rad/s about her longitudinal axis when she abducts her arms and doubles here radius of gyration about her longitudinal axis from 30 to 60cm. if her angular momentum i
Calculate the diameter of the bright circular spot formed on the 2.80 m high ceiling by the light reflected from the mirror
A 0.40 kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.1 m on a frictionless horizontal surface. If the cord will break when the tension in it exceeds 62 N, wha
A net force of 25 N is applied for 5.7 s to a 12-kg box initially at rest. What is the speed of the box at the end of the 5.7-s interval?
A 45.0 kg seal at an amusement park slides from rest down a ramp into the pool below. The top of the ramp is 2.00 m higher than the surface of the water and the ramp is inclined at an angle of 35.0
A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle....
Find the maximum torque exerted on the coil when the wire is used to make (a) a single-turn square coil and (b) a two-turn square coil.
If an object achieved an angular acceleration of 20 rad/s2 due to a torque of 40 Nm, what was the object's moment of inertia?
The cable supporting the beam is 2.00 long. What minimum tension must your cable be able to support without having your sign come crashing down?
A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have to just barely reach the positive disk?
A 73.0 kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations?(a) when the elevator is accelerating upward with an acceleration of 2.00 m/s2.
Two canoes are 10m apart on a lake. Each bobs up and down with a period of 8 seconds. When one canoe is at its highest point, the other canoe is at its lowest point. Both canoes are within a single
A 92 g cube of ice at 0°C is dropped into 1.0 kg of water that was originally at 78°C. What is the final temperature of the water after the ice.
A 1300 N uniform boom is supported by a cable perpendicular to the boom, as in the figure below. The boom is hinged at the bottom, and a 2100 N weight hangs from its top. Find the tension in the sup
Some time later the proton is at a point where the potential is 205 V. If no force other than the electrostatic force acts on the proton, what is its final kinetic energy?
Suppose the roller coaster in Fig. 6-38 (h1 = 32 m, h2 = 11 m, h3 = 30) passes point A with a speed of 1.20 m/s. If the average force of friction is equal to one third of its weight, with what speed
It is said that Galileo discovered a basic principle of the pendulum - that the period is independent of the amplitude - by using his pulse to time the period of swinging lamps in the cathedral as t
Correlational studies show that prolonged viewing of televised violence ________ increased rates of violent behavior.