Which of the following is a transuranium element?
a. Tc
b. Pu
c. Tm
d. Pm
b
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Applying the Newton's version of Kepler's third law (or the orbital velocity law) to a star orbiting 40,000 light-years from the center of the Milky Way Galaxy allows us to determine
A) the total mass of the entire Milky Way Galaxy. B) the mass of the black hole thought to reside in the center of the galaxy. C) the percentage of the galaxy's mass that is made of dark matter. D) the mass of the Milky Way Galaxy that lies within 40,000 light-years of the galactic center.
A car with good tires on a dry road can decelerate (slow down) at a steady rate of about 5.0 m/s2 when braking. If a car is initially traveling at 55 mi/h (a) how much time does it take the car to stop? (b) what is its stopping distance?
What will be an ideal response?
A 2200. kg auto moving at 12.0 m/s runs into a 3800. kg truck which is moving in the same direction at 5.00 m/s. The collision is perfectly inelastic
(a) What is the speed of the auto immediately after the collision? (b) What percentage kinetic energy did the truck gain in the collision?
What frequency of sound traveling in air at 40 oC has a wavelength of 0.50 m?
a. 20 Hz b. 344.7 Hz c. 502.9 Hz d. 711.2 Hz