Multiple-Object Accelerating Systems: Two boxes are connected to each other by a string as shown in the figure. The 10-N box slides without friction on the horizontal table surface. The pulley is ideal and the string has negligible mass. What is true about the tension T in the string?
A. T = 10 N
B. T = 20 N
C. T = 30 N
D. T < 30 N
E. T > 30 N
Answer: D
You might also like to view...
In the context of main-sequence stars, which of the following statements is true of a mass-luminosity relation?
A) The main-sequence stars in a Hertzsprung-Russell diagram are not ordered according to their masses. B) The lowest-mass stars are the hottest and brightest main-sequence stars. C) It is followed by giants, supergiants, and white dwarfs. D) The more massive a star is, the more luminous it is.
The model we have constructed in this chapter neglects feedback effects that might accelerate or brake the warming. Scientists now predict that the Arctic Ocean will be ice-free in the summer by as early as 2020 (due to increased temperatures in the Arctic). Less ice will mean that the Arctic will reflect less visible light back into space. Will this accelerate or brake the warming compared to the predictions of the model in the text?
A. Accelerate B. Brake C. No change
How many grams of ice at -13°C must be added to 711 grams of water that is initially at a temperature of 87°C to produce water at a final temperature of 10.0°C?
Assume that no heat is lost to the surroundings and that the container has negligible mass. The specific heat of liquid water is 4190 J/kg•C° and of ice is 2050 J/kg•C°. For water the normal melting point is 0.00°C and the heat of fusion is 334 × 103 J/kg. The normal boiling point is 100°C and the heat of vaporization is 2.26 × 106 J/kg.
A 2.00 m by 3.00 m plate of aluminum has a mass of 324 kg. What is the thickness of the plate? (The density of aluminum is 2.70 × 10^3 kg/m3.)