If vertically falling rain makes slanted 45° streaks on the side windows of a moving car, the speed of the car
A) is less than the speed of the falling drops.
B) equals the speed of the falling drops.
C) exceeds the speed of the falling drops.
D) need more information
Answer: B
You might also like to view...
A charge of 50 nC is uniformly distributed along the y axis from y = 3.0 m to y = 5.0 m. What is the magnitude of the electric field at the origin?
a. 18 N/C b. 50 N/C c. 30 N/C d. 15 N/C e. 90 N/C
A pair of parallel plates, forming a capacitor, are connected to a battery. While the capacitor is still connected to the battery maintaining a constant voltage, the plates are pulled apart to triple their original distance. What is the ratio of the final energy stored to the original energy stored?
a. 1/9 c. 3 b. 1/3 d. 1
A blacksmith is flattening a steel plate, 10 cm × 15 cm × 1 mm. He has heated the plate to 900 K. If the emissivity of the plate is 0.75, what is the total rate of radiation of energy?
The Stefan-Boltzmann constant is 5.67 × 10-8 W/(m2?K4). Ignore heat exchange with the surroundings. A) 360 W B) 760 W C) 790 W D) 850 W E) 880 W
Cubes of sugar, 1 cm on a side, are placed in water at 25ºC. Estimate the time before the lumps have dissolved; that is, when the sugar concentration at the lump is 10% by weight. Assume that the diffusivity of sugar into water is 6.9 x 10^-10m^2/s, the convective mass transfer coefficient is 6.4 x 10^-6m^2/s, and the self-diffusivity of sugar is 1 x 10^-5m^2/s. The density of sugar may be taken as 1500 kg/m^3.
What will be an ideal response?