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During a racing event, a 1400 kg car accelerates from 0 to 31 m/s in 4.5 s. What is the net force exerted on the car?
a) 203 N
b) 6.9 N
c) 43400 N
d) 9644 N
e) 0 N
Suppose a star with radius 8.62 108 m has a peak wavelength of 681 nm in the spectrum of its emitted radiation. What is the surface temperature of the star
Estimate the resolution of the human eye, limited by diffraction. Find the minimum resolvable separation between two points at a distance of 10 m
The noise level in an empty examination hall is 40 dB. When 100physics students are writing an exam, the sounds of heavy breathingand pens traveling rapidly over paper cause the noise level to riseto 63 dB (not counting the occasional groans).
When a satellite orbits the earth in a non-circular orbit which of the following is true.
In preparation for a demonstration on conservation of energy, a professor attaches a 7.2-kg bowling ball to a 2.9-m-long rope. Find the force the professor is exerting on the ball
A car is driving 22.7m/s flat ground drives off 42.3 m high cliff. How much time does it take to reach the ground.
a coaxial cable has an inner wire of radius 0.3 mm. with a linear charge density of 4.4e-08 c.m. surrounded by a
A movie camera with a (single) lens of focal length 90 mm takes a picture of a person standing 21 m away. If the person is 180 cm tall, what is the height of the image in millimeters
A stockroom worker pushes a box with a mass 11.2kg on a horizontal surface with a constant speed of 3.50m/s. coefficient of kinetic friction between the box and the surface is 0.20.
You are on the Turkish Twist, an amusement park ride with your back against the wall of a spinning vertical cylinder of radius 4.0 m, What is the minimum number of revolutions per minute necessary to prevent you from sliding down the wall
What is the wavelength of the waves on the string?
A bicycle wheel has a mass of 1.5 kg and a radius of 0.3 m. Ignore the mass of the spokes of the wheel. What is the angular velocity and the tangential velocity of the wheel after 4.0 sec
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