Consider a situation where two moving objects collide, stick to each other, and move off together.Internal energy
a. remains constant.
b. decreases.
c. increases.
d. varies but in a way that cannot be predicted.
c
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A glass flask has a volume of 500 mL at a temperature of 20°C. The flask contains of mercury at
The temperature of the mercury and flask is raised until the mercury reaches the reference mark. The coefficients of volume expansion of mercury and glass are 18 × 10-5 K-1 and 2.0 × 10-5 K-1, respectively. The temperature at which this occurs is closest to A) 122°C. B) 112°C. C) 102°C. D) 110°C. E) 132°C.
Using the Rayleigh Criterion for 400. nm light, what sized space telescope could have 1.0 km resolution of objects on Mars when viewed from above the Earth? (assume an Earth-Mars close distance of 80. million km)
A) 3.9 m B) 39. m C) 3.9 km D) 0.39 km E) 39. km
The number of cycles of a periodic process that occur per unit time is called
a. amplitude. b. frequency. c. period. d. wavelength. e. speed.
If ice at -40°C is added to water at +40°C, what final temperature will result?
1.It must be below 0°C. 2.It must be 0°C. 3.It must be above 0°C. 4.It can be below 0°C, 0°C, or above 0°C.