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A child stands at the rim of a rotating merry-go-round of radius 2.8 m. The child has a mass of 51.0kg, and the carousel turns with an angular velocity of 2.3 rad/s. What is the child's centripetal acceleration? Unable to interpret units. Computer reads units as "rad". Help: Physical_Units Tries 0/10 Previous Tries What is the horizontal force required between her feet and the floor of the carousel to keep her in the circular path? What minimum coefficient of static friction is required? (This will tell you whether she is likely to be able to stay on the merry-go-round.)
What should be the length of an organ pipe, open at both ends, if the fundamental frequency is to be 264.5 Hz
A block is released at the top of a plane inclined at 30o with the horizontal. The block begins to slide and travels 1 m in 2 s. What is the coefficient of kinetic friction between the block and the plane?
An astronaut travels to the nearest start system. 10 light years away, and returns at a speed of 0.5c. How much has the astronaut aged relative to those people remaining on Earth?
Calculate the peak voltage of a generator that rotates its 210 turn, 0.100 m diameter coil at 3600 rpm in a 0.830 T field
To prevent damage to floors (and to increase friction), a crutch will often have a rubber tip attached to its end. by what factor does the tip reduce the pressure exerted by the crutch
A coil has a DC resistance of 100 Ω and an impedance of 180 Ω at a frequency of 2 kHz. What is the inducatance of the coil
A person tries to heat up the bath water by adding 6.0 L of water at 70ºC to 60 L of water at 30ºC. What is the final temperature of the water mixture
A 0.302-m-thick sheet of ice covers a lake. The air temperature at the ice surface is -16.0 °C. In 5.90 minutes, the ice thickens by a small amount. Calculate the number of millimeters by which the ice thickens
Describe two different energy alternatives to fossil fuels in detail. Discuss how they work, how they compare with fossil fuels, and their relative advantages and disadvantages.
A sinusoidal current i= Icoswt has an rms value of I rms = 2.20 A. What is the current amplitude, What is the rectified average current
In a particular region of Earth's atmosphere, the electric field above Earth's surface has been measured to be 144 N/C downward at an altitude of 240 m and 177 N/C downward at an altitude of 390 m
A partly full paint can has 0.42 U.S. gallons of paint left in it. how thick is the layer of wet paint
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