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A person whose mass is 85.0 kg is exposedto a whole-body dose of 25.0 rads. How many joules of energy are deposited in the person's body?
A parachutist whose total mass is 100kg is falling at 50 m/swhen her parachute opens. How many times her weight is this force
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0 oC and rejects heat to a room at 24.0 oC. How much energy must be supplied to the device
A lab team rides a ski lift to the top of the mountain, due to some congestion their ears fail to pop, that is the pressure inside the ear does not equalize with the outside atmosphere. Calculate the force on the eardrum
A telephoto lens consists of a converging front lens of focal length f1 and diverging back lens of focal length f2 separated by a distance d. Compute the effective focal length of the lens system
State the condition that is necessary for a charge to move in a wire. Relate the definition of electric current to the units of current. Explain the cause of resistance and how the resistance of a wire can be determined.
Refrigerant-134a enters a compressor at 180 kPa as a saturated vapour with a flow rate of 0.35 m3/min and leaves at 700 kPa. The power supplied to the refrigerant during compression process is 2.35 kW. What is the temperature R-134a at the exit of th..
What should the charge (sign and magnitude) of a particle of mass 1.44 be for it to remain stationary when placed in a downward-directed electric field of magnitude 630 ? Use 9.81 for the magnitude of the acceleration due to gravity.
Green laser light with a wavelength of 521 nm strikes adifraction grating with 3000 lines/cm. How many spots appear on the screen
The driver of a car slams on the brakes when he sees a tree blocking the road. With what speed does the car then strike the tree
An observer on earth sees an alien vessel approach at a speed of .6c. A second spaceship comes to the rescue overtaking the aliens while moving directly toward Earth at a speed of .90c relative to earth.
a bird is flying directly toward a stationary bird-watcher and emits a frequency of 1250 hz. the bird-watcher however
the superconducting magnet for the experimental mri studies at a laboratory is a 1m long solenoid of 60 cm diameter
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