Improvements in technology will eventually allow the entire electromagnetic spectrum to be observed from high mountaintop observatories
Indicate whether the statement is true or false
FALSE
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If a supersonic plane is flying at increasing speed as the temperature decreases, what happens to the Mach number in this instance?
a. It stays the same. b. It increases. c. It decreases. d. It can do any of the above. e. It can do either (a) or (b) but not (c).
Which doesn't belong to the same family?
A) infrasonic waves B) ultrasonic waves C) radio waves D) shock waves E) longitudinal waves
What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen, 1.007 825 u; neutron, 1.008 665 u; helium, 4.002 602 u; also, 1 u = 931.5 MeV/c2)
a. 74.85 MeV added b. 74.85 MeV given off c. 28.30 MeV given off d. 28.30 MeV added
An electron of mass 9.11 × 10^-31 kg moves with a speed of 0.800c. What is its momentum? (c = 3.00 × 10^8 m/s)
a. 3.64 × 10^-22 kg×m/s c. 6.03 × 10^-22 kg×m/s b. 2.05 × 10^-22 kg×m/s d. 1.34 × 10^-22 kg×m/s