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A concave shaving mirror has a radius of curvature of 44 centimeter. It is positioned therefore that the (upright) image of a man's face is 2.10 times the size of the face. Compute how far is the mirror from the face?
(cm)
a body moving at 0.500c with respect to an observer disintegrates into two fragments that move in opposite directions
A cardinal (Richmondena cardinalis) of mass 4.00×10?2 and a baseball of mass 0.141 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of the baseball's momentum?
A ball is thrown straight up with a velocity of 18.0 m/s from the edge of the top of a building 30 meters tall. What is the balls velocity just before striking the ground
Electrons are ejected with a maximum velocity of 5.1 x 105 m/s from a metal when illuminated by photons with a wavelength of 440 nm. calculate The energy of the incident photons
A race car can be slowed with a steady acceleration of -11 m/s2 if the car is going 55m/s how many meters would it travel before it stops?
The only forces acting on a body have magnitudes of 20 N and 35 Nand directions that differ by 80 degrees. What is the approximate mass of the body
In a swimming pool, it is observed that the wave speed of ripples along the surface is 0.87 meter per second. Obtain the wavelength of the waves you create
A projectile is fired at v0 = 407.0 m/s at an angle of ? = 72.0o with respect to the horizontal. Assume that air friction will shorten the range by 34.1%. How far will the projectile travel in the horizontal direction, R?
A 2.0-kg rock initially at rest loses 407 J of potential energy while falling to the ground. Compute the kinetic energy that the rock gains while falling. What is the rock’s speed just before it strikes the ground?
a student calculates the unknown liquid to have a density of 0.87 gcm3. if the class average for the density of the
Suppose that the voltage of the battery in the circuit is 3.3 V, the magnitude of the magnetic field (directed perpendicularly into the plane of the screen) is 0.66 T, and the length of the rod between the rails is 0.23 m. Assuming that the rails are..
An 82.0 kg-diver stands at the edge of a light 5.00-m diving board, which is supported by two pillars 1.60 m apart, Find the force exerted by pillar B on the board
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