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Q1. A person with a mass of 103 kg is standing on a scale that reads weight in newtons inside of an elevator. If the elevator accelerates upward at 3.2 m/s2, what does the scale read?
Q2. Throughout a physics experiment, helium gas is cooled to a temperature of 12.0 at a pressure of 0.130. What are (a) mean free path in the gas, (b) rms speed of the atoms, and (c) the average energy per atom?
Q3. A race car has a mass of 709 kg. It starts from rest and travels 37.0 m in 4.0 s. The car is uniformly accelerated throughout the entire time. What net force is exerted on it?
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.
A skier starts from rest at the top of a hill that is inclined at 12.0° with the horizontal. The hillside is 180.0 m long, and the coefficient of friction between the snow and the skis is 0.0750. At the bottom of the hill, the snow is level and the c..
Compute the magnetic flux
What is resultant force
What is the magnitude and direction of the magnetic field
What is wave speed
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
What is fraction of the diameter of the Sun
Estimation instantaneous rate of evaporation
What is magnitude of the runners total displacement
What is the height of the hill . Find the coefficient of kinetic friction between flight bag and floor.
The radar system at an airport broadcasts 15 GHz with 150 kW. An approaching airplane with a 34 m^2 cross section is 24km away. Assume that the radar broadcasts uniformly in all directions and that the airplane scatters microwaves uniformly in all di..
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