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A child pushes a merry-go-round that has a diameter of 4 m and goes from rest to an angular speed of 15 rpm in a time of 64 s. Calculate the angular displacement and the average angular acceleration of the merry-go-round. What is the maximum tangential speed of the child if she rides on the edge of the platform?
A 160 m wide river flows due east at a uniform speed of 4.05 m/s. A boat with a speed of 7.2 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. What is (a) magnitude and (b) direction of the boat's velocity r..
the two sides of the dna double helix are connected by pairs of bases adenine thymine cytosine and guanine. because of
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
An object is placed 30 cm to the left of a converging lens of focal length 15 cm, and a diverging lens of focal length 20 cm is placed 45 cm to the right of the first lens. How far from the original object is the final image? What is the magnifica..
a concrete wall of a cold storage room measures 3.0 m high 5.0 m wide and 20 cm thick. the room temperature is
Consider a small, conducting sphere of 0.0010 kg mass. Extra electrons are placed on this sphere, How many electrons must be added to each sphere
An asteroid passes Earth over its equator. Pictures are taken of it from Earth's north and south poles simultaneously. In these pictures, the position of the asteroid differs by 10°. How far away was the asteroid from Earth's center when the pictu..
A 10.2 ohms resistor, a 10.2 µF capacitor, and a 30.3 mH inductor are connected in series with a 120 Volt (rms) source with variable frequency. Determine the maximum rms current
Two cars are on the highway and moving at speeds of v1 = 14.5m/s and v2 = 70.2m/s. What is the frequency of the second car's engine
Estimate the average acceleration of the car in second a gear and in fourth gear. Estimate how far the car traveled while in fourth gear.
an airplane starting from airport a flies 300 km east then 335 km at 27.0deg west of north and then 150 km north to
Find the velocity of each object after the collision.he encountered cold weather conditions on the way to Payson, Utah when the temperature was 23 kelvin lower than in Las Vegas, where he delivered his entire load. how much liters did he deliver.
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