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Q. When an 87kg adult uses a spiral staircase to climb to the second floor of his house, his gravitational potential energy increases by 2.20 x 10^3 J. By how much does potential energy of a 23kg child increase while the child climbs a normal staircase to the second floor?
Q. A force vector has a magnitude of 594 newtons and points at an angle 37o of below the positive x axis. What are (1) the x scalar component and (2) the y scalar component of the vector?
An underwater diver sees the sun 55 degrees above horizontal. How high is sun above the horizon to a fisherman in a boat above the diver.
find out the magnitude of their acceleration. If the blocks move determine the magnitude of the tension in the string. If the blocks do not move determine the sum of magnitude of the forces of friction acting on the blocks. Show all the work.
A satellite with a mass of 750 kg is in orbit around the earth. It is initially located at the altitude (measured from the earth's surface) of 2.12 x 106 m. It is then moved into a new orbit, with an altitude of 4.25 x 10^6 m (again, measured from..
How does the solar nebula theory describe the dramatic density difference between the terrestrial and Jovian planets.
The pilot of an aircraft wishes to fly due west in a 37.70 km/h wind blowing toward the south. The speed of the aircraft in the absence of the wind is 191 km/h.
A pump, submerged at the bottom of a well that is 34 m deep, is used to pump water uphill to the house that is 50 m above the top of the well, as shown above. All pressures are gauge pressures. Avoid the effects of friction, turbulence, and viscosity..
What is the velocity of the plank relative to the surface of ice.
The first electron has the initial velocity v0 that makes an angle θ=45° with the lower plate and has a magnitude of 7.53×106 m/s. would this electron strike one of the plates? If so, what is the horizontal distance from the left edge? If not enter t..
A circuit contains six 290 lamps and a 18 heater connected in parallel. The voltage across the circuit is 120V. If the circuit has a 11A fuse, will the fuse melt if all the lamps and the heater are on.
Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the create? Be sure to point to the direction of the net force.
A hotel elevator ascends 110 {rm m} with a maximum speed of 4 {rm m/s}. Its acceleration and deceleration both have a magnitude of 1.20 {rm m/s^2}.
The intensity of sunlight that reaches Jupiter (orbiting at about 5 AU) is approximately what fraction of that at Earths orbital distance.
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