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A bicycle rider pushes a bicycle that has a mass of 13kg up a steep hill. The incline is 25 degrees and the road is 275m long. The rider pushes the bike parallel to the road by a force of 25N
1) How much work does the rider do on the bike?
2) How much work is done by the force of gravity on the bike?
A penny sits 20 cm from the axis on an old record, which is spinning at 45 rpm. find the coefficient of friction between the penny and the record
How do you find the period of a binary star system?
David is driving a steady 21.0 when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.70 at the instant when David passes. How far does Tina drive before passing David.
Three carts of masses m1 = 4.50 kg, m2 = 12.00 kg, and m3 = 3.00 kg move on a frictionless, horizontal track with speeds of v1 = 4.50 m/s to the right, v2 = 3.00 m/s to the right, Find the final velocity of the train of three carts
q1. a 92 kg man standing on a surface of negligible friction shoves a 73 g stone lying at his feet giving it a velocity
Assume that each enriched fuel pellet is 10mm in length, 9mm in diameter, is 95% theoretical density (theoretical density of UO2 is 10.97g/cc), and that 5% of the uranium content is fissioned
An experimenter bombards a target of 54Cr with alpha particles such as 4He + 54Cr -> p+ 57Mn Suppose the incoming alpha particle has 26MeV kinetic energy in the lab, What is the kinetic energy of the detected proton
Aluminum's density is 2700 kg/m^3. An aluminum cube 3.4cm on a side is placed on a scale. What does the scale read when the cube is entirely in air
An RLC circuit includes a 10 resistor,1.5 µF capacitor, and 50 mH inductor. The capacitor is ratedat 1200 V. The circuit is driven by an AC source whose peak voltageis 100 V.
In the afternoon, the decibel level of a busy street is95 dB with 100 cars passing at a givenpoint every minute. What is the late night decibel level
a metal rod a and a metal sphere b on insulating stands touch each other they are originally neutral. a positively
The objective lens of a telescope is a symmetric glass lens with 100cm radii of curvature. The eyepiece lens is also a symmetric glass lens. What are the radii of curvature of the eyepiece lens
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