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Question: A charge of -1.0 µC is located at the origin, a second charge of 3.4 µC is located at x = 0, y = 0.1 m, and a third charge of 5 µC is located at x = 0.2 m, y = 0. Find th
Question: An ambulance has a siren of frequency 700 Hz. If the ambulance is moving at a speed of 60 miles per hour, what will be the frequency heard by a man standing on the sidewalk as the ambulan
Only 30% of the people in a large city feel that its mass transit system is adequate. If 25 persons are selected at random,
A piano string having a mass per unit length equal to 4.00 × 10-3 kg/m is under a tension of 1100 N. Find the speed with which a wave travels on this string.
We wish to determine the index of refraction (n) of a medium by measuring how much light bends when it travels from one medium to another. The law relating angles and indexes of refraction is Snell
The planet Venus requires 225 days to orbit the sun, which has a mass M = 1.99 x 1030 kg, in an almost circular trajectory. Calculate the radius of the orbit of Venus and the orbital speed of Venus
Question: A horizontal merry-go-round has a mass of 1000 kg, and is a solid disk of radius 2.00 m. It is started from rest by a constant horizontal force of 50.0 N applied tangentially to the edge o
Calculate the speed that the crate will have after it has moved 3 meters along the incline after having started from rest.
A 60.0-kg woman balances on one heel of a pair of high-heeled shoes. If the heel is circular and has a radius of 1.00 cm, what pressure does she exert on the floor if she stands on one foot?
Question: A car is moving straight at a speed of 60 miles per hour. It then turns at a bend of radius of curvature = 50 m. If the coefficient of friction between the car tires and the road is 0.35,
A railroad car of mass 25,000 kg is moving with a speed of 5.50 m/s. It collides and couples with three other coupled railroad cars, each of the same mass as the single car and initially at rest. Wh
The rock strikes the ground a horizontal distance of 25 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How tall is the building?
A 300-kg load is hung on a wire of length 5.00 m, cross-sectional area 0.200 × 10-4 m2, and Young's modulus 8.00 × 1010 N/m2. What is increase in length of the wire?
The train moves counterclockwise, soon attaining a constant speed of 0.700 relative to the tracks. Find the magnitude and direction of the angular velocity of the disk relative to the earth.
Find the magnitude and direction of the resultant force on the electron. (Let right be the +x-direction. Measure the angle counter-clockwise from the +x-axis.) magnitude direction
Question: A 0.24 µF and a 0.30 µF capacitor are connected in series to a 9 V battery. (a) Calculate the potential difference across each capacitor. 0.24 µF capacitor V 0.30 µF
According to the kinetic theory of gases, the pressure of a gas is due to:
Air enters a hot-air furnace at 7°C and leaves at 77°C. If the pressure does not change each entering cubic meter of air expands to:
Looking directly downward from a boat, you see a shark that appears to be 4.5 m below the water's surface. What's the shark's actual depth?
Question: If a particle of mass 5.4 kg is moving east at 10 m/s and a particle of mass 19 kg is moving west at 10 m/s, what is the velocity of the center of mass of the pair? answer in m/s west.
Immediately after the release, particle 1 has an acceleration A1 whose magnitude is 4.90 103 m/s2, while particle 2 has an acceleration A2 whose magnitude is 8.00 103 m/s2. Particle 1 has a mass of
Assuming you are 10m away from each other, what is the magnitude of the electric force between the two of you? Is the direction of the force towards or away from your neighbor? and how can you tell?
a) calculate the new angular speed of the disc b) if the lump gets unstuck and rolls of the disc.what will now be the angular speed of the disc ?
To appreciate the strength of gravity, calculate the number of steel cables that would be required in the absence of gravity to hold the moon in orbit about the earth. Each cable has a cross section
Heat is: A) energy transferred by virtue of a temperature difference B) energy transferred by macroscopic work C) energy content of an object D) a temperature difference E) a property objects have