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Is the kinetic energy conserved for the system? Determine the ratio of the final kinetic energy to initial kinetic energy.
The hare waits for a while after the tortoise passes and then runs toward the finish line again at 8.50 m/s. Both the hare and the tortoise cross the finish line at the exact same instant. Assume bo
Assume that light is a classical wave and that the light striking the disk is completely absorbed. How does your estimate compare with the observation that photoelectrons are emitted within 10-9s?
A 1000 kg cart is rolling to the right at 5.0 m/s. A 75 kg man is standing on the right end of the cart. What is the speed of the cart if the man suddenly starts running to the left with a speed of
A particle moves along the x axis. It is initially at the position 0.200 m, moving with velocity 0.160 m/s and acceleration -0.370 m/s2. Suppose it moves with constant acceleration for 5.50 s. (a) F
(a) Determine the magnitude and direction of the current in the lower wire. (b) Is the lower wire in stable equilibrium? (c) Repeat parts (a) and (b) if the second wire is suspended 5.0 cm above the
Two protons are moving directly toward one other with the same velocity. When they are far apart, their initial speeds are 1:2 105 ms.
A worker stands still on a roof sloped at an angle of 23° above the horizontal. He is prevented from slipping by a static frictional force of 540 N. Find the mass of the worker.
A force of 7 pounds is required to hold a spring stretched 0.5 feet beyond its natural length. How much work (in foot-pounds) is done in stretching the spring from its natural length to 0.9 feet be
A ray of light traveling in air strikes the surface of mineral oil at an angle of 23° with the normal to the surface. If the light travels at 2.17 multiplied by 108 m/s through the oil, what is
The current in the speaker will be 2.9 A when the force on the speaker coil is 14.8 N. What strength magnetic field will give this force?
The largest block in the great pyramid wiegh 15 ton (about 13,000 kg). Dragging such a block up a ramp with a mechanical advantage of 3 would require a force of 4.5*10^4n.if 9.0*10^5 j of work was d
An electric field of intensity 4.3 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true:
During liftoff, a hot air balloon accelerates upward at a rate of 3.3m/s^2. The balloonist drops a sand bag over the side of the gondola when the speed is 15 m/s.m What is the magnitude of the objec
Which is basically a diskshaped grindstone of mass 1.5 kg and radius 10.00 cm which operates at 700 rev/min. When the power is shut off, you time the grindstone and find it takes 26.1 s for it to st
Calculate the ratio of the gravitational force the doctor exerts on the baby to the gravitational force that Mars exerts on the baby.
A transverse wave on a string is described by the following equation. What distance does the wave travel during this time interval?
A rifle is aimed horizontally at a target 55.0 m away. The bullet hits the target 2.80 cm below the aim point.What was the bullet's flight time?
A 23 {rm kg} child goes down a straight slide inclined 38degrees above horizontal. The child is acted on by his weight, the normal force from the slide, and kinetic friction.
An 83 kg skier is sliding down a ski slope at a constant velocity. The slope makes an angle of 16° above the horizontal direction. Neglecting any air resistance, what is the force of kinetic fri
A novice skier, starting from rest, slides down a frictionless 28.0 incline whose vertical height is 170 . How fast is she going when she reaches the bottom?
A slingshot fires a pebble from the top of a building at a speed of 20.0 m/s. The building is 28.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the p
An Olympic skier moving at 15 m/s down a 28 degree slope encounters a region of wet snow of coe?cient of kinetic friction µ = 0.65. The acceleration of gravity is 9.8 m/s How far down the slope
It is immersed in 192 g of water, and the final temperature of the water and thermometer is 56.6 °C. What was the temperature of the water in degrees Celsius before the insertion of the thermome
1. Derive the Rydberg Equation from the definition of energy and wavelength emitted from known energy levels. Find the Rydberg Constant.