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Solve the following questions:
Question I: What is the drag force on a 1.6 m wide, 1.4 m high car traveling at 10 m/s (22 mph)? Suppose that the density of air is 1.2 kg/m3.
Question II: What is the drag force on a 1.6 m wide, 1.4 m high car traveling at 30 m/s (67 mph)? Suppose that the density of air is 1.2 kg/m3.
Explanation and formulas needed for best answer!
A 25.0g arrow is shot through a 7.8 cm apple. If the arrow enters the apple at 38.8 m/s and emerges with a speed of 30.10m/s in the same direction, what is the magnitude of force with which the apple has resisted the arrow.
In a diagnostic procedure a patient in a hospital ingest 80 mCi of gold-198 ( half life time is 2.7 days) what is the activity of the gold source in the end of a month ( after 30 days)
A mass hanging from a spring can oscillate in the vertical direction or can swing as a pendulum of small amplitude, however not both at the same time. Which one is longer, the period of the vertical oscillations or the period of the horizontal swings..
a)What is the angular velocity of the earth (regarded as a particle ) about the sun and b)its average linear speed in its orbit. c) What is the acceleration of the earth with respect to the sun
An Earth satellite moves in a circular orbit 644 km above Earth's surface with a period of 97.40 min, What are the magnitude of the centripetal acceleration of the satellite
A croquet mallet delivers an impulse of 8.07 N s to a 0.54- kg croquet ball initially at rest. What is the speed of the ball immediately after being struck
The displacement of a wave traveling in the positive x-direction is y(x, t) = (3.5 cm)cos(1.7x - 129t), where x is in m and t is in s. What is the frequency of this wave
A solution of H2SO4(aq) with a molal concentration of 3.22 m has a density of 1.183 g/mL. What is the molar concentration of this solution
A car is slides down an icy driveway that slopes at an angle of 20 degrees. What is an acceleration of the car? Assume that the friction between tires and the icy pavement is negligible.
Water is being boiled in an open kettle that has a 0.500 cm thickcircular aluminum bottom with a radius of 11 cm. If the water boils away at rate of0.480 kg/min, what is the temperatureof the lower surface of the bottom of the kettle? Assume that the..
A 1.00 kg block of copper at 20.0°C is lowered into a large insulated container of liquid ammonia at its boiling point (-33.3°C). determine the mass of liquid ammonia that boils away before thermal equilibrium
Four or five gram blocks of metal are sitting out in the sun and absorb the same amount of heat energy. Use the following specific heat capacity data to resolve which block will increase its temperature the most.
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