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A 71-kilogram person stands on a bathroom scale in an elevator. Find what does the scale read if the elevator is ascending with an acceleration of 3.0 m/s2?
Three beads are placed along a thin rod. The first bead has a mass m1=28g placed at a distance d1= 0.7 cm from the left of the rod. Calculate the numeric value of location of the center of mass relative to the middle bead in cm
A 70.0kg man jumps 1.00 m down onto a concrete walkway. Hisdownward motion stops in 0.0200 seconds. If he forgets tobend his knees, what force is transmitted to his leg bones
A test tube contains 2.90x10^-4 m3 of liquid carbon tetrachloride (? = 1240x10^-6 (C°)-1) at a temperature of 82.0°C. Find the volume of carbon tetrachloride in the test tube at -14.0°C
batteries are rated in terms of ampere-hours a h. for example a battery that can produce a current of 2.00 a for 3.00 h
A student's far point is at 17.0 cm, and she needs glasses to view her computer screen comfortably at a distance of 45.0 cm. What should be the power of the lenses for her glasses
A gas sample enclosed in a rigid metal container at room temperature (20.0°C) has an absolute pressure p1. The container is immersed in hot water until it warms to 40.0°C. What is the new absolute pressure p2?
a plane is flying in the horizontal plane. at time t1 0 s with the components of its velocity are vx 100 ms and vy
the membrane that surrounds a certain type of living cell has a surface area of 5.1 x 10-9 m2 and a thickness of 1.9 x
In the All-Alaska ice Floe Softball finals, the right fielder for the Nome IceSox (who is floating on a small chunk of ice in still water) makes an outstanding catch of a line drive. what is the final heading of the fielder just after the ball is c..
A mass of 210 g oscillates on a horizontal frictionless surface at a frequency of 4.0 Hz, What is the effective spring constant for this motion
A charged particle moves in a uniform magnetic field of 0.727 T with a period of 8.57 × 10-6 s. Find its charge-to-mass ratio
Vector has a magnitude of 63 units and points due west, while vector B has the sasme magnitude and points due south. Find the magnitude and direction of a) A + B and b) A - B. Specify the directions relative to due west.
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