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Light passes from air to water (n=1.33). The incoming ray in air is at an angle of 17.0° to the normal. What is the angle of refraction in the water?
A certain lightbulb is rated at 60.0 W when operating at an rmsvoltage of 1.20 x 102 V. (a) What is the peak voltage applied across the bulb? (b) What is the resistance of the bulb?(c) Does a 1.00 x 102 W bulb have greater or lessresistance than a 60..
A sinusoidal electromagnetic wave emitted by a cellular phone has a wavelength of 34.0cm and an electric-field amplitude of 4.30×10?2v/m at a distance of 200m from the antenna. Calculate the magnetic-field amplitude
A race car completes a lap on a 1600 m long track with an average speed of 250 km/h. If the car's average speed on the first half of the track was 205 km/h, what was its average speed on the second half?
Josh starts his sled at the top of a 2.3m -high hill that has a constant slope of 25 ?. How far from the hill does he end up
An electric dipole is formed from +/-4.0 nC point charges spaced 3mm apart. The dipole is cantered at the origin, oriented along the y-axis. What is an electric field strength at point (x,y) = ( 6.0 cm, 0 cm)
Fighter airplane is flying horizontally at the altitude h=5000m with velocity of u=100m/s. When airplane passes directly above an air defense station, find the horizontal distance s from the fun to the point of impact
A block with a mass of 10.0 g and a charge of +1.11 x 10-5 C is placed in an electric field with x component Ex = 2.51 x 103 N/C, y component Ey = -528 N/C, find the magnitude of the electrostatic force on the block
A 56.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.790 and 0.400, respectively. What horizontal pushing force is required to just start the crate moving
Two stars with masses 2.75 x 1030 kilogram and 7.42 × 1030 kilogram form a binary system. find the magnitude of the gravitational force in Newton's between the stars
The ring of negligible size is subjected to a vertical force of 200 lb. Determine the longest length l of cord AC such that the tension acting in AC is 160 lb. Also, what is the force acting in cord AB?
You are taking a photograph of a poster on the wall of your dorm room, therefore you can't back away any farther than 2.0 meter to take the shot. Find the longest focal length lens that will work
A 0.700-kg ball is on the end of a rope that is 2.50 m in length. The ball and rope are attached to a pole and the entire apparatus, including the pole, What is the tangential speed of the ball
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