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A women a toddler pushes a chair at a constant speed with a force of 25.0N for a distance of 2.5m. How much work is the child doing on the chair?
q1. a rocket moves with a velocity of 0.818c to the right with respect to a stationary observer a. an observer b moving
A car driving at 20 m/s is approaching a stoplight. As the stoplight turns red, the driver decides that the car is going too fast to stop at the white line and hits the brakes hard. How fast was the car going when the driver changed the rate of dec..
A computer disk is 8.0 in diameter. A reference dot on the edge of the disk is initially located at the disk accelerates steadily for 0.50, reaching 2000.
Vertically polarized light with an intensity of .60 W/m^2 passes through a polarizer whose transmission axis is at an angle of 35 degrees with the vertical
If a car traveling at 66 km/h will skid 22 m when its brakes lock, how far would it skid if it is traveling at 120 km/h when its brakes lock.
q1. a certain groove in phonograph record moves past the needle at 36 cms. if the wiggles in the grove are 0.1 mm apart
A speedboat starts from rest and accelerates at +2.01 m/s2 for 6.95 s. At the end of this time, the boat continues for the additional 5.70 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.20 s.
the expression f arv br2v2 gives the magnitude of the resistive force in newtons exerted on a sphere of radius r in
an inverted cylindrical container is lowered slowly beneath the surface of a pool of water. air trapped in the
A tuning fork of unknown frequency makes six beats per second with a standard fork of frequency 481.0 Hz. What is the frequency of this fork
What happens to the Heat and Temperature during a Phase Change? (For example: Solid to Liquid, Liquid to Gas, or Solid to Gas directly)
A heat engine does 502.23 J of work per cycle while exhausting 94.69 J of waste heat. What is the engine's thermal efficiency in percent
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