It takes 4.00 minutes to fill a gas tank with 50.0 liters of gasoline. If the pump nozzle is 1.35 cm in radius, what is the average speed of the gasoline as it leaves the nozzle? (1 000 liters = one cubic meter)
a. 3.64 m/s
b. 0.364 m/s
c. 21.8 m/s
d. 1.36 m/s
e. 12.5 m/s
b
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A possible means of spaceflight is to place a perfectly reflecting aluminized sheet into Earth orbit and use the light from the Sun to push this solar sail. If a huge sail of area 6.00 × 105 m2 and mass 6000 kg were placed into orbit and turned toward the Sun, what would be the force exerted on the sail? (Assume a solar intensity of 1380 W/m2.)
What will be an ideal response?
An electron is confined to a one-dimensional box of width 0.10 nm, about the size of an atom. What is its energy, in eV, in the ground state?
What will be an ideal response?
What kinds of atomic nuclei formed during the nucleosynthesis era?
A) only hydrogen B) essentially all of the chemical elements, except for those heavier than uranium C) roughly equal amounts of hydrogen, helium, lithium, beryllium, and boron D) only helium E) hydrogen, helium and trace amounts of lithium, beryllium, and boron
What value of B should be used in a velocity selector to separate out 2.0-keV protons if E is fixed at 80 kV/m?
a. 0.18 T b. 0.11 T c. 0.15 T d. 0.13 T e. 0.23 T