The common unit of radiation absorbed dosage is the ______________
Fill in the blank(s) with correct word
rem (or roentgen equivalent, man)
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When can Sirius, a favorite star of the Northern Hemisphere, be observed?
a. during summer b. during spring c. all year long d. during winter e. during fall
A rocket is moving at 1/4 the speed of light relative to Earth. At the center of this rocket, a light suddenly flashes. To an observer at rest in the rocket
A) the light will reach the front of the rocket at the same instant that it reaches the back of the rocket. B) the light will reach the front of the rocket before it reaches the back of the rocket. C) the light will reach the front of the rocket after it reaches the back of the rocket.
The Sun exerts almost 200 times more force on the oceans of the Earth than the Moon does. Why then, is the Moon more effective in raising tides?
What will be an ideal response?
Constant Angular Acceleration: A machinist turns on the power on to a grinding wheel at time t = 0 s. The wheel accelerates uniformly from rest for 10 s and reaches the operating angular speed of 58 rad/s. The wheel is run at that angular velocity for 30 s, and then power is shut off. The wheel slows down uniformly at 1.4 rad/s2 until the wheel stops. What is the total number of revolutions made by the wheel in this situation?
A. 510 B. 280 C. 320 D. 470 E. 750