The voltage across the dees of a cyclotron is 30,000 V. How many revolutions do the protons go through in reaching 21 MeV kinetic energy?
A)
more than 2 x 106
B)
1400
C)
700
D)
350
E)
35
D
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A submarine is located 2.000 km below the surface of the water. What is the absolute pressure of the seawater on the outside of the submarine? (density of seawater is 1,025
A. 175.0 atm B. 187.3 atm C. 199.2 atm D. 205.5 atm E. 210.0 atm
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t.The kinetic energy of the crate is 1/2 mv2
a. True b. False Indicate whether the statement is true or false
A mechanical advantage of polymer semiconductors relative to single-crystal silicon is that polymers are _________.
Fill in the blank(s) with the appropriate word(s).
The chromosphere is the layer of the Sun that we see as its visible surface
Indicate whether the statement is true or false