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Assume that the total heat of vapourization (540 cal/g) of water is just sufficient to supply the energy needed to tear 1 g of water molecules apart from each other. A) How many molecules are there in 1 g of water? B) How much energy is needed per molecule for this purpose?
The "hang time" of a punt is measured to be 4.50 s. If the ball was kicked at an angle of 63 degrees above the horizontal and was caught at the same level from which it was kicked, what was its initial speed?
At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, By what percentage does the intensity increase
A 72 kg meteorite buries itself 5.0 m into soft mud. The force between the meteorite and the mud is given by , What was the speed of the meteorite
A boy exploring a cave drops a rock into a dark crevasse. He hears the rock strike the bottom 10.1 s after dropping it. Find the depth of the crevasse
The magnetic fild inside a superconducting solenoid is 4.50 T. The solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. Determind the magnetic energy density in the field
A golf ball is hit at ground level. The ball is observed to reach its maximum height above ground level 3.8 s after being hit, How high is the fence
a 2021-kg car is moving down a road with a slope grade of 13 while slowing down at a rate of 3.4 ms2. what is the
For the real or imaginary nucleus of 85X210, find the net electrical charge of the nucleus, the approximate radius of the nucleus, and the nuclear density
There is a clever kitchen gadget for drying lettuce leaves after you wash them. what is the magnitude of the centripetal acceleration at the outer wall
If the LED emits light from a circle with diameter 10mm and is to couple to the fiber which has a50 micro meter diameter core .assume it radiates with afull cone angle 30 degree.
A 500 kg vehicle is cruising down the highway at 30 m/s when the driver creates an average force of 700 N by stepping on the gas. How much work was done by the vehicle during the .50km of acceleration
A star has a mass of 1.27 x 1030 kg and is moving in a circular orbit about the center of its galaxy. The radius of the orbit is 1.0 x 104light-years, Determine the tangential speed of the star
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