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A person is standing in an elevator that is stationary. The scale reads 600N The elevator starts moving upward. What is the persons weight when the velocity of the elevator is 3 m/s upward and the acceleration upward is 2 m/s^2
What is the weight of the person when the velocity is 3 m/s upward and the acceleration is 2 m/s^2 downward?
The frequency doubled output of a Nd3+ YAG laser has a wavelength of 532nm. If each pulse of light has a total energy of 0.550J and the repetition rate of the laser is 30Hz, how many photons does the laser emit at 532nm in 3 minutes?
Assume a uniform mass distribution before and after. Icm for a solid sphere of uniform density is 2/5 mr2.
After the skier on the hill had been moving for 5.0 s, friction of the snow suddenly increasedmaking the net force on the skier zero. what is new coefficient of friction? how fast would the skier now be going after skiing for 5.0s.
How fast is the top of the tree moving (in m/s) just before it hits the ground? Model the tree as straight, rigid rod, and ignore friction and air resistance.
a thin rod of length 10.3m and mass 20kg is supported at a 30 degree incline. one support is 2.4m and the other is 8.3m from the lower end of the rod, Find the normal force exerted on the rod by the upper support answer in units of N
Sam, whose mass is 74kg , straps on his skis and starts down a 44m -high, 20? frictionless slope. Use work and energy to find Sam's speed at the bottom
An object with a mass of 72.0 g displaces 590.0 ml of water when it is completely immersed. What is the buoyant force on the mass?
How large does the radius R of the dish have to be to attain electric field vector amplitude of 0.1mV/m at the receiver.
How high is the top of the ski lift relative to base.
A 25g ball is fired with an initial speed v1 toward a 150g ball that is hanging motionless from a 1.30m string. The balls have a perfectly elastic collision. As a result, 150 g ball swings out until the string makes an angle of 37° with vertical. ..
Having taken a nap under a tree only 20 m from the finish line, Rabbit wakes up to find Turtle 19.5 m beyond him, grinding along at 1/4 m/s. If the bewildered hare can accelerate at 9 m/s2 up to his top speed of 16 m/s (36 mi/h) and sustain that s..
In a mass spectrometer, a singly charged ion having a particular velocity is selected by using a magnetic field of 0.10 T , What is the mass of the ion
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