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A bedroom bureau with a mass of 57 kg,including drawers and clothing, rests on the floor.
a) If the coefficient of static friction between the bureau and the floor is 0.45, what is the minimumhorizontal force a person must apply to start the bureaumoving?
b) If the drawers and clothing, with 20kg mass, are removed before the bureau is pushed, what is the new minimum magnitude?
A string on a musical instrument vibrates in its fundamental mode with nodes on either end. The length of the vibrating segment is 0.39 m. The maximum transverse velocity at a point in the middle of the string is 3.8 m/s and the maximum transverse ac..
A layer of air has a temperature T0 of 30 Celsius at ground level and a lapse rate ? of 20 Celsius/km. determine its upward velocity at that point
The position of a particle is given by the expression x = 2.00 cos (2.00?t + ?), where x is in meters and t is in seconds. Determine the phase constant
a force of 160 n stretches a spring 0.050 m beyond its unscratched lengtha what magnitude of force is required to
A mortar* crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action, How long will the mortar shell remain in the air
the weight of the car is 14 kn. you know three points on the plane a2i6j1k b2i5j c5i2j all in meters. what is the force
Due to a temperature difference ?T, heat is conducted through a brass plate that is 0.027 m thick. How thick should the steel plate be so that the same amount of heat per second is conducted through it
diamagnetism is caused by:
A 66kg rock climber is climbing a so called chimney between two rock slabs, What is her push against the rock
Suppose you are planning a trip in which a spacecraft is to travel at a constant velocity for exactly eleven months, as measured by a clock on board the spacecraft, and then return home at the same speed. Upon return, the people on earth will have ag..
Explain, using thermodynamically sound principles, what each of the following temperatures represents:
The work performed as a function of time for a process is given by W = at3 , where a = 2.4 J/s3. What is the instantaneous power output at t = 2.6 s
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