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The Moon's diameter is about 3474 Km and is located 384,400 Km from Earth. What is the angular size of the Moon? Answer in (a) radians (b) degrees.
A speaker at the front of a room and an identical speaker atthe rear of the room are being driven at 421 Hz by the same sound source. How many beats does the student hear per second
Two wires are identical, except that one is gold (resistivity = 2.44×10-8 ?·m) and the other is NiChrome (resistivity = 1.10×10-6 ?·m). What is the resistance of the NiChrome wire
An astronaut on the moon places a package on a scale and findsits weigh to be 31 N. What would the weight of the package be on the earth? What is the mass of the package on the moon?
Electric charge can accumulate on an airplane in flight. You may have observed needle-shaped metal extensions on the wing tips and tail of an airplane. What is the electric potential of each sphere
a. if you push a lawn mower across a yard in 10 seconds how does the work done compare with pushing it across the same
a steel wire 2.04 m long with a circular cross section must stretch no more than .260 cm when a 400.3 N weight is hung from one of its ends, what is the minimum diameter must this wire have
Carlos is pitching in the nal game of the season. The pitcher's mound is 18.4 meters from home plate, With what speed does the ball cross the plate
A 50.0 kg skier is at the top of a slope. At the initial point at the top is 25.0 m vertically above point at the bottom. find the change in Potential energy of the skier-Earth system as the skier goes from top to bottom
A power line carries a 225-A current from east to west parallel to the surface of Earth. What is the direction of the force? In your judgment, would this force be significant in designing towers to hold these power lines?
to examine a particular blood sample in biology lab a student uses a compound microscope set to have a magnification of
The average density of the planet uranus is 1.27 x 10^3 kg/m^3. The ratio of the mass of neptune to that of Uranus is 1.19. Find the average density of Neptune
three equal point charges each with charge 1.75mc are placed at the vertices of an equilateral triangle whose sides
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