Static frictional force which the ground exerts
A car (m = 1540 kg) is parked on a road that rises 17.2 ° above the horizontal. What are the magnitudes of (a) the normal force and (b) the static frictional force that the ground exerts on the tires?
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Assuming the descent is vertical, find the magnitude of the thrust needed to reduce the velocity to zero at the instant when the craft touches the lunar surface.
Draw the process on a T-s diagram. What is the thermal efficiency of the cycle? What is the mass flow rate of air (lbm/h)? How much net power is developed by the cycle (BTU/h)?
Mineral oil can be used in place of mercury in manometers when small pressure changes are to be measured. What is the pressure ofan oxygen sample in mm of mineral oil if its pressure is 28.5 mmHg? (density of mineral oil = 0.88 g/mL ; density of H
Tidal effects in the Earth-Moon system are causing the Moon's orbital period to increase at a current rate of about 35 ms per century. Assuming the Moon's orbit around the Earth is circular, to what rate of change in the Earth-Moon distance does t
At 1400 mm Hg and 286 K a diver exhales a 208 mL bubble of airthat is 77% N2 , 17% O2, and 6%CO2 by volume. How many milliliters would the volume of the bubble be at the surface and 298 K and how many moles of N2 are in the bubble?
What is the volumetric flow rate of the air entering the compressor in ft3/min? What are the temperatures at the compressor and turbine exits in °R? What is the thermal efficiency of the cycle?
Suppose that in front of a hotel in a large city, successive 20 second intervals constitute independent trials, in which either a single cab will arrive (with probability 0.2), or no cabs will arrive (with probability 0.8). Find the probability th
A worker stands still on a roof sloped at an angle of 39° above the horizontal. He is prevented from slipping by a static frictional force of 500 N. Find the mass of the worker.
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