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Q1. The drawing shows identical stones that are being whirled on the tabletop at the same speed. The radius of the larger circle is twice that of the smaller circle. How is the tension T1 in the longer cord related to tension T2 in the shorter cord?
Q2. A gardener feels it is taking him excessively long to water a garden with a 0.952cm diameter hose. By what factor will his time be shortened, if he uses a 1.58 cm diameter hose?
The mean (average) of their squares
What type of car was involved in the hit and run
A simple pendulum in a science museum entry hall is 3.51m long, has a 1.25kg bob at its lower end, and swings with an amplitude of 10.50 degrees. How much time does the pendulum take to swing from its extreme right side to its acute left side.
An observer inside the building notices that it takes 0.15s for the tile to pass her window, whose height is 2.20m. How far above the top of this window is the roof.
A 76kg student consumes 2500 Cal each day and stays the same weight. One day, he eats 3500 Cal and, wanting to keep from gaining weight, decides to "work off" the excess by jumping up and down.
To stretch a relaxed biceps muscle 2.30cm requires a force of 25 N. Find the Young's modulus for muscle tissue assume it to be a uniform cylinder of length 0.24 m and cross-sectional area 51 cm2.
A brass plate measures 30 cm by 40 cm. The coefficient of linear thermal expansion is 19.0 10-6/°C. If the temperature of the plate is increased by 10.0 K, next what is the increase in the area of the plate? a) 0.350 cm2 b) 0.404 cm2 c) 0.456 cm2 ..
Megan's mass is 27 kg. She climbs the 4.8 m ladder of a slide and reaches a velocity of 3.6 m/s at the bottom of the slide. How much work was completed by friction on Megan? Imagine that air resistance is negligible.
What is braking distance for the first train
An archer puts a 0.54 kg arrow to the bowstring. An average force of 202 N is exerted to draw the string back 1.3 m. suppose that air resistance is negligible.
A uniform plank of length 4.50 m and weight 275 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 456 N walk on the overhanging part of the plank before it just be..
Find out the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
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