EM waves travel at a speed that varies with their wavelength
Indicate whether the statement is true or false
F
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A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160. m drops a package of supplies. Two seconds later it drops a second package. How far apart will the two packages land on the ground?
A) 100. m B) 67.7 m C) 283. m D) 162. m E) 177. m
Acceleration due to gravity is 9.8 m/s2 on the surface of Earth, and at orbits 200 miles above the surface of Earth, where the space shuttle orbits, the acceleration is
A. less than 9.8 m/s2. B. greater than 9.8 m/s2. C. exactly 9.8 m/s2-same as on the surface of Earth. D. undetermined, because it depends on the mass of the spacecraft or satellite.
Photon A has an energy of 3.3 × 10^–19 J. Photon B has 4 times the frequency of Photon A. What is the energy of Photon B?
a. 8.3E–20 J b. 1.7E–19 J c. 1.3E–18 J d. 6.6E–19 J e. 5.3E–18 J
I take 2.0 kg of ice and dump it into 2.3 kg of water and, when equilibrium is reached, I have 4.3 kg of ice at 0°C. The water was originally at 0°C. The specific heat of water = 1.00 kcal/kg/°C, the specific heat of ice = 0.500 kcal/kg/°C, and the latent heat of fusion of water is 80.0 kcal/kg. The original temperature of the ice was
a. one or two degrees below 0°C. b. –46.0°C. c. –184°C. d. 184°C. e. The whole experiment is impossible.