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Question
For an object in free fall, the velocity vs time graph is a straight line. Consider how this graph would be different if the force of air resistance (which increases with increasing speed until the object reaches a constant terminal velocity) is not negligible. Sketch a graph showing the shape of a falling object's velocity vs time curve in the case of non-negligible air resistance. Take downwards to be the negative direction.
A solar water heater for domestic hot-water supply uses solar collecting panels with a collection efficiency of 47.0% in a location where the average solar-energy input is 200 W/m^2...... If the water comes into the house at 15.0C and is to be heated..
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 2.70 104 s. What is the speed at which the satellite travels
An 85 kg man is standing 3.5 m from the right end of a10.0 m long 175 kg platform suspended by a cable at each end. What is the tension in the right side cable
How much heat flows from 1.00 kg of water at 38.0°C when it is placed in contact with 1.00 kg of 20°C water in reaching equilibrium, What is the change in entropy due to this heat transfer
A sound wave propagating in air has a frequency of 4.45 kHz. Estimate the change in wavelength when the wave, initially traveling in a region where T = 27°C, enters a region where T = 11.5°C
How is the Compton effect important to our understanding of the nature of electromagnetic radiation?
a solenoid 60 cm long and of radius 4.0 cm has 3 layers of windings of 300 turns each. a 2.0 cm long wire of mass 2.5 g
An 80 kg person climbs a set of stairs that are 5 meters high. How much gravitational potential energy does she gain
A car starts from rest and travels for 4.7 s with a uniform acceleration of +1.9 m/s2. The driver then applies the brakes, How far has the car gone from its start
How many 95W light bulbs can you use in a 120V circuit without tripping a 17A circuit breaker? (The bulbs are connected in parallel, which means that the potential difference across each light bulb is V.)
a ball is thrown directly downward with an initial speed of 6.95 ms from a height of 28.5 m. after what interval does
q1. collapsible plastic bags are used in hospitals for infusions. we want to use such a bag to infuse an electrolyte
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