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When a crown with mass 14,7 kg is submerged in water, an accurate scale reads only 13.4 kg. Is the crown made of gold?
john is listening to a horn. he knows the frequency of the horn is 516.402 hz when both he and the horn are at rest. if
only two horizontal forces act on a 3.0 kg body that can move over a frictionless floor. one force is 9.0 n acting due
A cat stuck up a tree and has 500 J gravitational potential energy. It then falls. Find the kinetic energy of the cat just before it is caught by the owner. Find the kinetic energy of the cat after it is caught by the owner.
The blackbody radiation emitted from a furnace peaks at a wavelength of 3.4 10-6 m(0.0000034 m). What is the temperature inside the furnace
A ball of mass 100 gram travels toward a catcher of a ballistic pendulum of length 1.0 meter. The mass of the catcher is 200 gram. Determine the velocity of the ball before the collision
A ray of light strikes a flat, 2.00-cm-thick block of glass (n = 2) at an angle of ? = 8.7° with respect to the normal, Find the angle of refraction at the top surface
The intensity of radiation from a distant source like the Sunvaries inversely with the square of the distance from thesource. At the top of Earth's atmosphere the solar intensity(power per unit area) is 1.35 kW/m2.
a microscope for viewing blood cells has an objective with a focal length of 0.50 cm and an eyepiece with a focal
A submarine descending with a constant speed v emits sound signals of duration T0. What is the speed of the submarine
The first-order principal maximum produced by a grating is located at an angle of ? = 15.0 degrees. What is the angle for the third-order maximum
A small insect viewed through a convex lens is 1.0 centimeter from the lens and appears five times its actual size. Determine what is the focal length of the lens
The wheel on an upside-down bicycle moves through 17.5 rad in 5.10seconds. what is the wheel's angular acceleration if its initialangular speed is 1.0 rad/s? answer in units of rad/s2
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