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The New River Gorge bridge in West Virginia is a 518 m long steel arch. How much will its length change between temperature extremes -22°C and 36°C? answer should be in cm.
King Arthur's knights fire a cannon from the top of the castlewall. The cannonball is fired at a speed of 54 m/s and at an angle of 30 °. What is the fired ball's maximum height above the ground
What is the kinetic energy of α particle while it reaches the other plate? The distance between the plates is 33 cm.
Two workers are moving a slab of ice (m = 410 kg) across the factory floor. As seen from above, one worker exerts a force of 255 N at an angle of -50o, At what angle does the ice slab accelerate
The ball is free from rest with the line taut and horizontal (θ = 90.0°). At what angle θ (measured from the vertical) would the fishline break.
To test the quality of a tennis ball, you drop it onto the floor from a height of 4.02 m. what is its average acceleration during that contact
To get the top spinning, its string is pulled with a tension of 0.30. Explain how long does it take for the top to complete the first five revolutions? The string is long enough that it is wrapped around the top more than five turns.
an electron moving with a velocity of 2.7 x106 ms in the positive x direction enters a region where there is a uniform
Suppose that you wish to fabricate a uniform wire out of 0.850 g of copper. Assume the wire has a resistance R = 0.600 ?, What will be the diameter of the wire
A large cruise ship of mass 6.70 107 kg has a speed of 13.0 m/s at some instant. How much work is required to stop it
If it takes light 8 ns to travel 1.655 m in an optical cable, what is the index of refraction of the cable
The temperature near the surface of the earth is 291 K. Axenon atom (atomic mass = 131.29 u) has a kinetic energy equal tothe average translational kinetic energy, how high up would it go before coming to rest
A 84.3-kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.67 rad/s. Find the angular velocity of the platform with its load
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