A tennis player standing 12.6 m from the net hits the ball at 3.00° above the horizontal. To clear the net, the ball must rise at least 0.330 m. If the ball just clears the net at the apex of its trajectory, how fast was the ball moving when it left the racket?
What will be an ideal response?
48.6 m/s
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What is the binding energy per nucleon for Al? The neutral Al atom has a mass of 26.981539 u; a neutral hydrogen atom has a mass of 1.007825 u; a neutron has a mass of 1.008665 u; and a proton has a mass of 1.007277 u. 1 u = 931.494 MeV/c2
A) 8.3 MeV B) 6.7 MeV C) 5.4 MeV D) 3.4 MeV E) 2.8 MeV
A thin beam of light enters a thick plastic sheet from air at an angle of 32.0° with the normal and continues in the sheet at an angle of 23.0° with the normal. What is the index of refraction of the plastic?
A) 0.74 B) 1.11 C) 1.28 D) 1.36
A solution is defined to be a solute dissolved in a
solvent that is in a) the solid phase. b) the liquid phase. c) the gaseous phase. d) any of the three physical phases. •
There is an uncertainty associated with every measurement
Indicate whether the statement is true or false