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A submarine is 319 m horizontally out from the shore and 111 m beneath the surface of the water. A laser beam is sent from the submarine so that it strikes the surface of the water at a point 209 m from the shore. If the beam just strikes the top of a building standing directly at the water’s edge, find the height of the building. The index of refraction of the water is 1.333 . Answer in units of m.
An initially stationary 1.3 kg object accelerates horizontally and uniformly to a speed of 17 m/s in 3.0 s. What is the instantaneous power due to that force
A muscle builder holds the ends of a massless rope. At the center of the rope, a 7.9 kg ball is hung as shown. What is the tension in the rope
Choose one part of the photo-electric experiment that cannot be explained by assuming that light is a wave. Why do we need the concept of light as a particle?
An electron is accelerated by a 4.5 kV potential difference. How strong a magnetic field must be experienced by the electron if its path is a circle of radius 5 cm.
A bowling ball (mass = 4.4 kg, radius = 0.11 m) and a billiard ball (mass = 0.37 kg, radius = 0.028 m) may each be treated as uniform spheres
Kinetic energy is a microscopic concept. The equivalent cacroscopic concept is: The second law of thermodynamics has a number of equivalent definitions, all of which give an indication of which way nature flows.
A steam-powered electrical generator operates at a boiler temperature of 220 C and exhausts to a cooling reservoir at 18 C. Find the maximum theoretical efficiency of the plant
A 54.5-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.646 and 0.321, respectively. What horizontal pushing force is required to just start the crate moving
q1. gamma-ray busters are objects in the universe that emit pulses of gamma rays with high energies. the frequency of
A small conductive rod of length 1.5 m moves with a constant velocity v=15 m/s in a direction parallel to a long wire carrying a current of 22 A. Calculate the electric potential induced across the rod
What is the total force on the bottom of a swimming pool 29.5m by 9.1m whose uniform depth is 1.6m, What is the absolute pressure on the bottom of a swimming pool
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. How far from the Earth's surface must the spacecraft be
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