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Q1. A 97 kg man drops from rest on a diving board -2.8 m above the surface of water and comes to rest 0.68 s after reaching the water. The acceleration because of gravity is 9.81 m/s^2. What force does the water exert on the man? Reply in units of N.
Q2. The sound level measured in the room by a person watching a movie in a home theatre system varies from 63 dB throughout a quiet part to 92 dB throughout a loud part. In the order of how many times louder is the latter sound?
The sodium D line is a doublet consisting of two wavelengths, 588.995 and 589.592 nm. Calculate the angular separation between these two lines in the first-order spectrum for a grating with 4000 lines per centimeter. Repeat for the second order.
A research Van de Graaff generator has a 3.80 m diameter metal sphere with a charge of 1.06 mC on it. What is the electric potential on the surface of the sphere
he Sun has an orbital speed of about 220 km/s around the centre of the Galaxy, Estimate the total mass of the Galaxy in Solar masses
Assuming that air resistance is simply a constant 91 N force on the person during the fall, identify the person’s velocity just be- fore hitting the net.
A 130kg mail bag hangs by a vertical rope 3.3m long. As the bag is moved to this position, how much work is done by the worker
The inner surface is negative relative to the outer surface. Explain how much work is required to eject a positive sodium ion (Na+) from the interior of the cell?
An aircraft weighing 971 N is accelerated at 9.1 m/s/s for 5 seconds, at which time the aircraft launches. What is the force required to launch the aircraft
A 55-kg skier starts from rest at the top of a ski jump, point A is at the top of the ramp and is 40.6 m above the end of the ramp, Determine the distance (s) to where she strikes the ground.
On a banked race track, the smallest circular path on which cars can move has a radius of 112m, while the largest has a radius of 165m, as the drawing illustrates. The height of the outer wall is 18m. The largest speed at which cars can move on thi..
Three moles of an ideal monatomic gas are at a temperature of 345 K. What is the change in the internal energy of the gas
A small fly of mass 0.27 grams is caught in a spider's web. The web vibrates predominately with a frequency of 4.50 Hertz. What is the value of the effective spring constant stiffness constant for the web.
A charge of 15.0 uC is plaed at the center of a cube. Each side of the cube has an area of 4.50 cm^2 calculate The total electric flux passing through the surface of the cube
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