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Emmy is standing on a moving sidewalk traveling with an initial velocity of 2 m/s, when she experiences some acceleration over the 5-second time period shown in the right-hand graph below. On the left-hand graph, construct a plot of Emmy's velocity over this same time period.
A battery has an emf of 5.9 V and internal resistance of 0.78 ?. The battery is attached to the load resistor R = 7.3 ?. Find the electric current in the circuit.
An undersea research chamber is spherical with an external diameterof 4.90 m. The mass of the chamber, when occupied, is61300 kg. What is the buoyant force on the chamber
You are working out on a rowing machine. Each time you pull the rowing bar (which simulates the oars) toward you, find the magnitude of the force that you exert on the handle
you have a compound microscope with a barrel of length 161 mm. the focal lengths of the objective and the eyepiece are
A train moving with constant velocity travels 180 m north in 14 s and an undetermined distance to the west. How far west has the train traveled in this time
A block of mass 3.1 kilogram rests on a frictionless inclined plane, held in place by a string of mass 0.023 kilogram. Determine how long does it take a wave to travel from one end of the string to the other
A space vehicle is coasting at a constant velocity of 28.5 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.523 m/s2 in the +x direction.
A baseball player hits a ball at 49.2m/s at an angle of 29.0 degrees above the horizontal. The outfield bleachers are 145 m away from the home plate.
Two blocks are free to slide along the frictionless wooden track shown below. The block of mass m1 = 5.06 kg is released from the position shown, at height h = 5.00 m above the flat part of the track. Protruding from its front end is the north pol..
A 871-kg satellite is in circular orbit around the Earth and moving at a speed of 2.97 km/s. How much work must be done to move the satellite into another circular orbit that is twice as high above the surface of the Earth?
a young lady runs for 20 minutes and gives off 168 kcal of heat by evaporation of water from her skin. how much water
An engine has a maximum theoretical efficiency of 45%. If the temperature difference between the input, what is the exhaust temperature
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