Which of the following is a transuranium element?
a. Am
b. Pa
c. Ra
d. Tc
a
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A large cylindrical water tank is mounted on a platform with its central axis vertical. The water level is 3.75 m above the base of the tank, and base is 6.50 m above the ground. A small hole 2.22 mm in diameter has formed in the base of the tank
Both the hole and the top of the tank are open to the air. We can ignore air resistance and treat water as an ideal fluid with a density of 1000 kg/m3. (a) How many cubic meters of water per second is this tank losing? (b) How fast is the water from the hole moving just as it reaches the ground?
How long does it take for Earth to revolve around the Sun?
A) one day B) one week C) one month D) one year
The end of a cylindrical plastic rod is polished and cut perpendicular to the axis of the cylinder
Determine the minimum index of refraction so that a light ray entering the end of the rod will always be totally internally reflected within the rod, i.e., it will never escape the rod until it comes to the other end. Assume a critical angle of 45°.
Alec and Michelle release their snowballs from the same height, at the same time and with the same speed. Alec's is thrown upward while Michelle’s is thrown downward. Which one hits the ground with the greatest speed (ignore air resistance)?
A. the one thrown upward B. the one thrown downward C. they hit with the same speed D. it depends on the initial height