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Question: Your roommate is working on his bicycle and has the bike upside down. He spins the 70.0cm -diameter wheel, and you notice that a pebble stuck in the tread goes by three times every second. Part A) What is the pebble's speed? Express your answer with the appropriate units Part B)Part B What is the pebble's acceleration? Express your answer with the appropriate units.
You are consulting for an amusement park that wants to build a new "Rotor" ride. What must be the angular speed in revolutions per minute
Vectors and lie in an xy plane. has magnitude 8.40 and angle 132° from the positive direction of the x axis. has components Bx = -8.00 and By = -9.20. (Type 'undefined' for any answer if appropriate.)
At what rate is the surface area of the tumor decreasing when the radius is 3 mm? (Recall that for a sphere, S = 4pr2.)
Tasha with a nearsighted eye has near and far points of 16 cm and 25 cm, respectively. What is the power of the lens she uses
Calculate the density of the metal with which the crown is made.
The vertical displacement of particles in a string, where everything is measured in standard units, meters and seconds, What is the amplitude of the wave
1. A wrench is accidentally dropped from a building 90. m above the ground.
A coil of wire with a resistance of 0.45 ohm has a self-inductance of 0.083 H. If a 3.0-V battery is connect across the ends of the coil, what is the stored energy in the inductor
An ideal gas is enclosed in a cylinder that has a moveable piston on top. The piston has a mass of 6200 g and an area of 5 cm2 and is free to slide up and down.
A sign (mass 1900 kg) hangs from the endof a vertical steel girder with a cross-sectional area of0.18 m2. (Ignore the mass ofthe girder itself.) What is the stress within the girder
A 20-kg sled is pushed up a 34° slope to a vertical height of 140 m. A constant friction force of 50 N acts for the entire distance. What external work was required
Two muscles in the back of the leg pull upward on the Achilles tendon, as shown in Figure. These muscles are called the medial and lateral heads of the gastrocnemius muscle. Find the magnitude and direction of the total force on the Achilles tendo..
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