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A 1.29-kg block slides across a rough surface such that it slows down with an acceleration of 1.40 m/s2. What is the coefficient of kinetic friction between the block and the surface?
How high does a rocket have to go above the Earth's surface until its weight is 0.8 times its weight on the Earth's surface? The radius of the earth is 6.37 × 106 m and the acceleration of gr
A bicycle wheel of radius 0.32 m rolls down a hill without slipping. Its linear velocity increases constantly from 0 to 5 m/s in 2.9 s. Through what angle does the wheel turn in the 2.9 s?
A thin film of glass (n = 1.66) of thickness 0.213 µm is viewed under white light at near normal incidence. What wavelength of visible light is most strongly reflected by the film when surrou
A steel ball of mass 0.440 kg is fastened to a cord 57.0 cm long and fixed at the far end. It is released when the cord is horizontal. At the bottom of its path, the ball strikes a 2.60 kg steel bl
A pipe open at one end only has a fundamental frequency of 277 Hz. A second pipe, initially identical to the first pipe, is shortened by cutting off a portion of the open end. Now, when both pipes
The period of oscillation of an object in a frictionlesstunnel running through the Earth is 84.3 min. What is the period ofoscillation of an object in a similar tunnel on the Moon?
A small object with a mass of 400 mg carries a charge of 20.0 nC and is suspended by a thread between the vertical plates of a parallel-plate capacitor. The plates are separated by 3.00 cm. If the
A student produced an interference pattern using microwaves by placing a double slit in front of a microwave generator. If the slits are 5.00 cm apart and the antinodes of the pattern are 14.5 cm ap
An outfielder throws a 0.150 kg baseball at a speed of 52.0 m/s and an initial angle of 30.0°. What is the kinetic energy of the ball at the highest point of its motion?
The motor that drives the Reverse Power Coupling in the Millennium Falcon. How quickly can the Millennium get up to light-speed (when the rod rotates at 15,000-rot/s) from rest?
What are the upper and lower bounds of the range of the possible depths of the air bubble beneath the surface?
A 48.0 {rm kg} ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.00 turns each second. The distance from one hand to the other is 1.5 {rm m}.
What are the various properties of a substance that determine its heat capacity?
A tennis ball of mass 57 g travels with velocity < 48, 0, 0 > m/s toward a wall. After bouncing off the wall, the tennis ball is observed to be traveling with velocity < -42, 0, 0 > m/s
When an AC source is connected across a 12.5-Ω resistor, the rms current in the resistor is 8.36 A. Find the rms voltage across the resistor.
While rolling balls down an inclined plane, Galileo observes that the ball rolls 1 cubit as he counts to 10. How far will the ball have rolled from its starting point when he has counted to 20?
A hydrometer is used to measure the specific gravity of liquids. For a certain liquid a hydrometer reading indicates a specific gravity of 1.15. What is the liquid's density and specific weight?
When the tire surface is rotating at a maximum speed of 1 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8
A 400 N child is in a swing that is attached to a pair of ropes 2.0 m long. Find the gravitational potential energy of the chile earth system relative to the childs lowest position when the ropes a
Describe the prevailing arguments of what constitutes a "just war," and assess the justice of the Vietnam War in that context.
A 120-g mug at 21degreeesC is filled with 210 g of coffee at 91degreesC. Assumin all of the heat lost by the coffee is transferred to the mug, what is the final temperature of the coffee? The specif
When the tire surface is rotating at a maximum speed of 1 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N
The ambulance driver has a siren sounding at 540 Hz. At what frequency does the driver of the car hear the siren?
If a drop of mass 6.82449 x 10^-13 kg remains stationary in an electric field of 1.1 x 10^6 N/C, what is the charge of this drop?