When 50 g of a certain material at 100°C is mixed with 100 g of water at 0°C, the final temperature is 40°C. What is the specific heat of the material? The specific heat of water is 1.00 kcal/kg ? C°
A) 0.33 kcal/kg ? C°
B) 0.75 kcal/kg ? C°
C) 1.3 kcal/kg ? C°
D) 7.5 kcal/kg ? C°
C
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Constant Acceleration Kinematics: An object starts from rest and undergoes uniform acceleration. During the first second it travels 5.0 m. How far will it travel during the third second?
A. 5.0 m B. 15 m C. 25 m D. 45 m
In order to simulate apparent weightlessness for astronauts in training (when the astronauts do not push on a seat), they are flown in a vertical circle
If the passengers are to experience weightlessness, how fast should an airplane be moving at the top of a vertical circle with a radius of 2.5 km? A) 79 m/s B) 310 m/s C) 260 m/s D) 160 m/s E) 510 m/s
The red light from a HeNe laboratory laser results from a transition in Ne. Determine the wavelength of the light given off if the energy difference between states is 1.08 eV. (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^?19 J, and 1 nm = 10?9 m)
a. 383 nm b. 1840 nm c. 1150 nm d. 1340 nm e. 203 nm
Amy, Brad, and Cate are walking (or running) along a straight line as represented below