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It has the same speed in the downward direction (assuming air resistance can be ignored). What was the average acceleration vector of the ball?
A transparent oil with index of refraction 1.29 spills on the surface of water (index of refraction 1.33), producing a maximum of reflection with normally incident violet light (wavelength 400 nm i
Calculate the magnitude of the induced emf (in volts) between the tips of the wings when the speed of the plane is v = 239 m/s.
If the coefficient of static frinction between block and plank is 0.3 and the coefficient of kinetic friction is 0.2 (a) what is the tilt angle of the plank when the block first starts moving?
A 70.0 kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted into place?
A rotating door is made from four rectangular sections, as indicated in the drawing. The mass of each section is 89 kg. A person pushes on the outer edge of one section with a force of F = 74 N that
A thin spherical shell has a radius of 2 m and a mass of 275 kg. What is the gravitational field at each of the following distances from the center of the shell?
A 13 g bullet traveling 224 m/s penetrates a 2.0 kg block of wood and emerges cleanly at 164 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bull
A 0.4 kg bead slides on a curved wire, starting from rest at point A as shown in the figure. The segment from A to B is frictionless, and the segment from B to C is rough. The point A is at height 9
Three point charges are arranged on a line. Charge = +5.00 and is at the origin. Charge = -3.50 and is at = 4.50 . Charge is at = 1.00. What is (magnitude and sign) if the net force on is zero?
Four identical masses of mass 600 mg each are placed at the corners of a square whose side lengths are 15.0cm. What is the magnitude of the net gravitational force on one of the masses, due to the
A circuit contains six 210 lamps and a 14.0 heater connected in parallel. The voltage across the circuit is 120 V. If the circuit has a 12 A fuse, will the fuse melt if all the lamps and the heater
A brick is thrown vertically upward with an initial speed of 4.50 m/s from the roof of a building. If the building is 108.0 m tall, how much time passes before the brick lands on the ground?
Photons of wavelength 490 nm are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc of radius 10.7 cm by a magnetic field with a magnitude of 1.8
What is the original temperature (in Celsius) of the cylinder? The specific heat of water is 1 cal/g·K, and of copper is 0.0923 cal/g·K. The latent heat of vaporization of water is 539
A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.33 hours. What is density of the planet? Assume that the planet has a uniform density
What is the maximum launch speed you could give this projectile if you shot it straight up? Express your answer in terms of h and g.
The space between the plates is filled with air. The glass is illuminated from above with light having a wavelength in air of 656. How many interference fringes are observed per centimeter in the re
If a fisherman applies a horizontal force with magnitude 49.0 {rm N} to the box and produces an acceleration of magnitude 3.40 {rm m}/{rm s}^{2}, what is the mass of the box?
The densities of gold, silver, and water are 19.3 g/cm^3, 10.5 g/cm^3 and 1.00 g/cm^3, respectively. What would be its apparent weight if it was made of pure gold? What would be its apparent weight
Determine the distance of a cliff if an echo takes 10 seconds at 20 degrees celsius to be heard.
If a horizontal force is slowly increased until it is barely enough to make the block start moving, what is the net force on the block the instant that it starts to slide?
The tungsten filament of a certain 100 W light bulb radiates 2.00 W of light. (The other 98 W is carried away by convection and conduction.) The filament has surface area of 0.250 mm2 and an emissiv
Suppose you had two small boxes, each containing 1.00 {rm g} of protons. If one were placed on the moon by an astronaut and the other were left on the earth.
A 22.8- child is standing on the outer edge of a merry-go-round that has moment of inertia 830 and radius 2.40 . The entire system is initially rotating at 0.180 . Find the angular velocity if the