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Q1. A box of mass 32 kg is at rest on a horizontal frictionless surface. A constant horizontal force then acts on the box, and accelerates it to the right. It is observed that it takes the box 6.5 seconds to travel 48 meters. What is the magnitude of force?
Q2. A physics instructor wants to produce a double-slit interference pattern large enough for her class to see. For the size of room, she decides that the distance between successive bright fringes on the screen must be at least 2.58 cm. If the slits have a separation d = 0.0270 mm, what is minimum distance from the slits to the screen when 580 nm light is used?
If an average frequency emitted by a 200,-,rm W light bulb is 5.00 times 10^{14} , {rm Hz}, and 10.0 percent of the input power is emitted as visible light, approximately how many visible-light photons are emitted per second .
An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..
Determine Maximum wavelength and Minimum wavelength. How various penguins of mass 16 kg each can stand on the ice block before they find their feet wet.
How much does the rocket clear the top of the wall
What is the instantaneous power, at a time of 0.00700 seconds, dissipated by a 200 ohm resistor in a resonant AC circuit powered by a generator with a 21.0 V greatest potential difference operating at 5000 rad/s .
How much time is necessary to catch the car
Estimate the thickness of lead shielding needed to reduce the exposure rate 2.5 m from a 5.92x10^11 Bq point source of Cs-137 to 1.0 mR/hr.
What is an average speed of the runner
The incident electron loses energy The incident electron emits an x-ray.
Evaluate the electrostatic energy of two opposite charges
What is first order diffraction angle of light
Estimate how many times planet has orbited its star
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