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A stone with a mass of 0.80 kg is attached to one end of a string 0.90 m long. The string will break if its tension exceeds 60.0 N. The stone is whirled in a horizontal circle on a frictionless tab
A spacecraft of 140 kg mass is in a circular orbit about the Earth at a height h = 4RE. What is the spacecraft's kinetic energy? Find the numerical value of the angular momentum.
Two strings are adjusted to vibrate at exactly 209 Hz. Then the tension in one string is increased slightly. Afterward, three beats per second are heard when the strings vibrate at the same time. Wh
The Hall voltage across a conductor in a 42 mT magnetic field is 1.9 mu V. When used with the same current in a different magnetic field, the voltage across the conductor is 2.7 mu V.
Estimate the total amount of translational kinetic energy in a small classroom at normal room temperature. Assume the room measures 4.50 m by 12.0 m by 4.00 m.
A movie camera with a (single) lens of focal length 73 mm takes a picture of a 187 cm high person standing 30 m away. What is the height of the image of the person on the film?
A very long solenoid of circular cross section with radius r= 5.40cm has n= 86.0 turns/cm of wire. An electron is sitting outside the solenoid, at a distance r= 5.90 cm from the solenoid axis. What
Three pendulums with strings of the same length and bobs of the same mass are pulled out to angles q1, q2 and q3 respectively and released. The approximation sin q = q holds for all three angl
A rocket blasts off from a platform on a space station. An identical rocket blast off from free space. Considering that everything else is equal, will the two rockets have the same acceleration? Exp
Determine the horizontal and vertical components of the velocity that is 339 mph pointing up from the grund at an angle of 35 degrees
A 12 kg runaway grocery cart runs into a spring with spring constant 300 N/m and compresses it by 70 cm. What was the speed of the cart just before it hit the spring?
Calculate the force of gravity between a human adult (mass = 70 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its closest to Earth (distance = 8. 1010 m)
A force of 20.0 N is required to pull a 40.0 kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden black across the sam
Determine the mole ratio for the following reaction: oxygen gas and carbon react to form carbon monoxide,CO.
A force of 55.0 N is required to pull a 45.0 kg wooden block at a constant velocity across a smooth glass surface on Earth. What force would be required to pull the same wooden black across the sam
A 74-kg fireman slides down a 4-m pole by applying a frictional force of 384 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches the ground?
At time a grinding wheel has an angular velocity of 30.0 . It has a constant angular acceleration of 35.0 until a circuit breaker trips at time = 2.30. From then on, the wheel turns through an angl
The net flux through a Gaussian sphere centered on the particle is a function of the radius r of the sphere. (a)What is the charge of the central particle? (b) What are the net charges of shell A an
A satellite circles planet Roton every 2.3 h in an orbit having a radius of 1.2 ´ 107 m. If the radius of Roton is 5.0 ´ 106 m, what is the magnitude of the free-fall acceleration on th
A charged particle (m = 2.0 g, q = -50 µC) moves in a region of uniform field along a helical path (radius = 4.0 cm, pitch = 8.0 cm). What is the angle between the velocity of the particle an
A fisherman and his rowboat have a combined mass of 125 kg. Standing in the motionless boat in calm water, he tosses out a 5 kg rock from the back of the boat, with a velocity of 5 m/s. What will be
The minimum distance required to stop a car moving at 34.0 mi/h is 42.0 ft. What is the minimum stopping distance for the same car moving at 64.0 mi/h, assuming the same rate of acceleration?
An ideal gas at 20 consists of atoms. 7.6 of thermal energy are removed from the gas. What is the new temperature in?
A magnetic computer disk 8.0 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. A small dot is painted on the edge of the disk. The disk accelerates at 600 rad/s^2