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Area of 22.0Ai.initially the spring is at rest length. How many kilograms of sand must be slowly poured into the container to press the spring by 7.00 cm.
A horizontal uniform bar of mass 2.6 kg and length 3.0 m is hung horizontally on two vertical strings. String 1 is attached to the end of the bar, and string 2 is attached a distance 0.7 m from the
A football player runs directly down the field for 35 m before turning to the right at an angle of 25 from his original direction and running an additional 15 m before being tackled. a) What is the
To determine the nature of the mineral, you decide to measure the mass and the dimensions of the metal, which turnout to be 9.84 g, a diameter 17 mm and a height of 15 mm.
Dr. Redish has observed people with cameras undergoing some strange behavior.
What mass (in grams) of steam at 100°C must be mixed with 499 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 77.0°C?
A 5.00-g bullet is fired horizontally into a 1.20-kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.20. The bullet remains embedded
A 215 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic frictio
The small washer in Fig. 2 slides down the cord OA. When it is at the midpoint, its speed is 200 mm/s and its acceleration is 10 mm/s2. Express the velocity and acceleration of the washer at this p
What is the wavelength of the line in the Balmer series of the hydrogen atom that is comprised of transitions from n=4 to the n=2 level?
Two thin lenses of focal lengths f1 = 8.8 cm and f2 = -5 cm, are placed in contact. Calculate the focal length of the combination of these two lenses.
The generator is connected across a 20.0-V resistor. By inspection, what are the (a) maximum voltage and (b) frequency?
A beam of light consisting of wavelengths from 460 nm to 640 nm is directed perpendicularly onto a diffraction grating with 160 lines/mm.
A piece of string 5.30 m long has a mass of 17.0 g. What must the tension in the string be to make the wavelength of a 128 Hz wave 120.0 cm?
A train is traveling up a 3.8^circ incline at a speed of 2.80 m/s when the last car breaks free and begins to coast without friction. How long does it take for the last car to come to rest momentar
What is the maximum amount of energy the incident electron can lose inelastically in this collision? What is remaining energy of the electron?
Bonnie and Clyde are sliding 300kg bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 410N of force while Bonnie pulls forward o
A child goes down a playground slide with an acceleration of 1.20 m/s2. Calculate the coefficient of kinetic friction between the child and the slide if the slide is inclined at an angle of 31.2&de
A paratrooper is initially falling downward at a speed of 33.0 m/s before her parachute opens. How far does the paratrooper fall during this time interval
A hunter aims directly at a target 120 m away. If the bullet leaves the gun at a speed of 260m/s by how much will it miss the target?
What is the magnitude of his initial angular acceleration about point O if your pull on his gi is (a) negligible and (b) horizontal with a magnitude of 300 N and applied at height h = 1.4 m? Assume
A sample of gas is expanded to twice its original volume while its temperature is held constant. Relative to their original average energy, the new average energy of the molecules is?
A monkey is chained to a stake in the ground. The stake is 3.14 m from a vertical pole, and the chain is 3.51 m long. How high can the monkey climb up the pole?
A 26.0 kg hammer strikes a steel spike 2.90 cm in diameter while moving with speed of 20.0 m/s. The hammer rebounds with speed 10.0 m/s after 0.110 s. What is the average strain in the spike during