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A solid block is attached to a spring scale. When the block is suspended in air, the scale reads 22.2N ; when it is completely immersed in water, the scale reads 15.4N.
a. What is the volume of the block?
b. What is the density of the block?
a 2.0 nc charge is placed on the x-axis at x=-3.0cm another 2.0nc charge is placed on the x-axis at x=3.0cm, What is the potential at the origin
A 0.14 kg baseball moves horizontally with a speed of 27 m/s toward a bat. find magnitude of the impulse delivered to the ball by the bat
A 60-kg skier starts from rest from the top of a 50-m high slope. If the work done by friction is -6.0 15) x 103 J, what is the speed of the skier
The rms electric field of an electromagnetic wave increases from 286 to 858 N/C.find the wave intensities for the two values of the electric field.
A straight wire in a magnetic field experiences a force of 0.030 N when the current in the wire is 2.7 A. What is the new current
It is proposed that future space stations create an artificial gravity by rotating. Suppose a space station is constructed as a 1600-m-diameter cylinder, What rotation period will provide "normal" gravity
A child on roller skates undergoes an acceleration of 0.8 m/s2 due to a horizontal net force of 20 N. What is the mass of the child
The crest of the second hill is circular, with a radius of r = 35m. Avoid friction and air resistance. What must be the height h of the first hill so that skier just loses contact with the snow at the crest of the second hill.
It takes a student t = 5.2 s to push a block m = 6 kg at a constant velocity over a distance of d = 4.6 m. How much power was applied to the block in Watts
Two identical spacecraft are to be accelerated by rockets. The first rocket fires with a force 4 times as large as that of the second rocket. The acceleration of the first rocket is how many times as vast as the acceleration of the second rocket.
In a hydraulic lift, the maximum gauge pressure is 18.7 atm. what is the heaviest vehicle that can be lifted
A motorcycle accelerates uniformly from rest and reaches a linear speed of 21.3 m/s in a time of 9.60 s. find the magnitude of the angular acceleration of each tire
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