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An electromagnetic wave of intensity 240 W/m2 is incident normally on a rectangular card with sides of 19 cm and 31 cm that reflects the entire radiation incident on it. Discover the force exerted by the electromagnetic wave on the card if the radiation is incident at an angle of 30° to the normal.
A loudspeaker receives 8.0 W of power from an audio amplifier, and turns 3 % of that power into sound waves. What is the decibel intensity at this distance
A cork in the form of a cylinder with length 6 centimeter and cross-sectional area 4 cm^2 is placed in water and it is found that one half of its volume is submerged. Calculate the frequency of oscillation for the cork
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.00e-4 m3 and its mass is 3.48 kg. (a) What mass of gold is contained in the rock in kg? (b) What percentage of the rock is gold by volume? (..
An airplane wing is designed so that the speed of the air across the top of the wing is 231 meter per second when the speed of the air below the wing is 217 meter per second. Determine the lifting force on a wing of area 20.0 m2
An unstable particle is at rest and suddenly breaks up into two fragments. No external forces act on the particle or its fragments. One of the fragments has a velocity of +0.800c and a mass of 1.87 10-27 kg, while the other has a mass of 4.31 10-27 k..
an infinite line charge of uniform linear charge density -1.1 cm lies parallel to the y axis at x -1 m. a point
Planet Z is 1.00x10^4 km in diameter. The free fall acceleration on Planet Z is 5.00 m/s^2. What is the free fall acceleration
A solid, uniform ball rolls without slipping up a hill, How fast is it moving just before it lands and How far from the foot of the cliff does the ball land
A person's lens prescription for glasses is +3 D. If the glasses sit 1.9 cm from the eye, what is that person's near point
A car is designed to get its energy from a rotating flywheelwith a radius of 1.50 m and a mass of475 kg. Find the kinetic energy stored in the flywheel
A motorcycle has a constant speed of 28.1 m/s as it passes over the top of a hill whose radius of curvature is 130 m. Find the magnitude of the centripetal force
During an acceleration, the angular speed of an engine increases from 850 rpm to 2750 rpm in 4.4 s. What is the average angular acceleration of the engine
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