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Small wheels attached to the ends of rod AB roll along two surfaces. Knowing that at the instant shown the velocity vA of wheel A is 4.5 ft/s to the right and the relative velocity vB/A of wheel B with respect to wheel A is perpendicular to rod AB, determine
(a) The relative velocity vB/A,
(b) The velocity vB of wheelB.
Two energy reservoirs are at 20 degrees Celsius and 827 degrees Celsius. How much energy does this engine extract from the hot reservoir to do 3500 J of work
A football is kicked with a speed of 20m/s at an angle of 40 degrees to the horizontal, how long is the football in the air
The density of bubble gum is about 970 kg/m3 . You blow a 7.00-gram wad of gum into a bubble with a measured diameter of 9.50 cm. What is the thickness of the bubble
A child starts from rest at the top of a spiral water slide. Suppose the slide is frictionless and the top is 8.5m above the bottom of the slide. The slides make three complete turns, each of radius 3m. What is the child's speed at the bottom of the ..
A solid sphere and a solid cylinder with the same mass and radius roll down an inclined plane without slipping. Which one will reach the bottom of the incline first. Explain why. Assume friction is negligible for both.
radiation from the head is a major source of heat loss from the human body. model a head as a 20-cm-diameter 20-cm-tall
At the instant a traffic light turns green a car that has been waiting at the intersection starts ahead with a constant acceleration of 2.00 m/s2. Determine the speed the car when it passes the truck
Two adjacent sources each emit a frequency of 800 Hz in air where the velocity of sound is 340 m/s. How much farther back would source 1 have to be moved so that an observer in front of the sources hears no sound?
A neutral atom has electrons completely filling the shells with principal quantum number n = 1, 2, and 3. How many protons does the nucleus contain
A 54.1-kg ice skater is standing at rest on a frozen lake. The friction between his skates and the surface of the ice is negligible. what is the magnitude of his recoil velocity
A laboratory technician drops a 0.0840-kg sample of unknown material, at a temperature of 100.0°C, into a calorimeter. Compute the specific heat capacity of the sample
A 200-loop coil of cross sectional area 8.5 cm2 lies in the plane of the paper. Directed out of the plane of the paper is a magnetic field of 0.06 T. What is the average voltage induced as the flux is changing
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