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In order to freeze an ice cream mixture, its temperature must be brought below approximately -3°C. Explain how surrounding the ice cream in a salty ice water brine helps it reach this temperature.
q1. a spaceship travels with a constant speed of 0.3c as it passes by the earth on its way to a distant star.a. the
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and final states 1 and 2
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 670 N and that of your belongings is 1030 N. Determine the work done by the elevator in lifting you
a proton of atomic mass 1u with a speed of 750 m/s collides elastically with another proton at rest. What is the final speed of the target proton after the collision
An electron with a speed of 3.55·E5 m/s enters a uniform mangetic field of magnitude 0.0397 T at an angle of 34.5° to the magnetic field lines, Determine the radius of the helical path
A plastic rod is charged to -20 nC by rubbing. How many electrons have been added or protons removed
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. (a) Assume that the Earth is a conducting sphere with charge on its surface.
All distant galaxies are moving away from us. Describe why this does not imply that we are at the center of universe.
A bowling ball weighing 71.2 is attached to the ceiling by a 3.50 rope. The ball is pulled to one side and released; it then swings back and forth like a pendulum. As the rope swings through its lowest point, speed of the bowling ball is measured a..
A computer to be used in a satellite must be able to withstand accelerations of up to 27 times the acceleration due to gravity. What is the minimum amplitude of vibration that must be used in this test
Two people carry a heavy electric motor by placing it on a light board 2.90m long. One person lifts at one end with a force of 370N, What is the weight of the motor
Paul is what most people consider a "jock." He is the captain of both the football and wrestling team and he also plays hockey. Upon entering Mrs. Title's class she figured that he would not take course seriously nor would he excel in class. She p..
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