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(1) A 100 meter length of steel changes temperature by 30 C during the course of a day. If the coeffcient of thermal expansion of steel is 12 parts per million per C, what is the change in length of the steel?
(2) A volume of gas initially at 37 C is compressed by a factor of 10 (VFinal = 1/10VInitial). If the pressureincreases from 112 kPa to 1904 kPa, what is the final temperature?
At this time it has reached a height of 420 metres above launch pad and attained an upward velocity of 50 ms-1. From this time on, the rocket has constant upward acceleration -10 ms-2 (due to the effect of gravity alone).
In compressing the spring in a toy dart gun, 0.9 J of work is done. When the gun is fired, the spring gives its potential energy to a dart with a mass of 0.05 kg, What is the dart's speed
An electron has an initial velocity of 4.9 × 106 m/s in a uniform 1.9 × 105 N/C strength electric field, What is the direction of the electric field
An airplane must reach a speed of 172 mi/h to take off. If the runway is 470 m long, what is the minimum value of the acceleration that would allow the airplane to take off productively.
A light string that does not stretch changes from horizontal to vertical as it passes over the edge of a table. The string connects m1, a 3.4 kg block, originally at rest on the horizontal table at a height 1.27m above the floor, to m2, a hanging ..
Calculate the time the microgel would require to recover to 99% of its initial height after the stress is removed. Determine the potential barrier for the molecule aggregation?
What is an initial speed given to the rock
A charge of -3.80 nC and a charge of -6.00 nC are separated by a distance of 60.0 cm. Find out the position at which a third charge of +7.30 nC could be placed so that the net electrostatic force on it is zero.
You are an engineer in charge of designing a new generation of elevators for a prospective upgrade to the empire state building. Before the state legislature votes on funding for the project.
An electron is brought to a point 0.2m from the center of a conducting sphere of radius 0.1m carrying a charge of 4.0x10^-6 C, What is the force acting on the electron
A 13g bullet traveling 221 m/s penetrates a 2 kg block of wood and emerges cleanly at 160 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
suppose that they have same internal energy, which will have a higher temperature: a metal knife in thermal equilibrim with a hot griddle or a 1kg block of ice at -25C or seven 12g ice cubes at -25C.
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