Water flows through a pipe. The diameter of the pipe at point B is larger than at point A. Where is the speed of the water greater?
A) point A
B) point B
C) same at both A and B
D) Cannot be determined from the information given.
A
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You are heating two chunks of metal of the same size and shape. One is made of lead and is heated to 400 K. The other is made of iron and is also heated to 400 K. Which of the following statements apply to the thermal radiation the two chunks emit?
A) The two spectra peak at the same wavelength. B) The spectra cannot be compared because they come from different materials. C) The lead spectrum peak is at a shorter wavelength than the iron spectrum peak. D) The lead spectrum peak is at a longer wavelength than the iron spectrum peak.
The surface temperature of Venus is 750K, even hotter than Mercury
Indicate whether the statement is true or false
A 60.0-kg mass person wishes to push a 120-kg mass box across a level floor. The coefficient of static friction between the person's shoes and the floor is 0.700
What is the maximum coefficient of static friction between the box and the floor such that the person can push horizontally on the box and cause it to start moving? A) 0.333 B) 0.500 C) 0.350 D) 0.667 E) 0.700
What is the approximate range of masses that newborn main sequence stars can have?
A) 0.1 to 1,000 solar masses B) 0.001 to 150 solar masses C) 0.001 to 10 solar masses D) 0.1 to 150 solar masses E) 0.1 to 10 solar masses