Some type of catastrophe is likely needed to explain the highly tilted rotation axis of Uranus
Indicate whether the statement is true or false
TRUE
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A scientist is investigating the results of varying temperature on the growth rate of a bacterial culture. In this experiment, temperature is the:
a. dependent variable b. independent variable c. control d. model e. hypothesis
Pressure in a Liquid: A water tank is filled to a depth of 10 m, and the bottom of the tank is 20 m above ground. A water-filled hose that is 2.0 cm in diameter extends from the bottom of the tank to the ground, but no water is flowing in this hose. The water pressure at ground level in the hose is closest to which of the following values? The density of water is 1000 kg/m3.
A. 3.9 × 105 N/m2 B. 2.0 × 104 N/m2 C. 9.2 N/m2 D. The question cannot be answered because the cross sectional area of the tank is needed.
Two metal rods, one silver and the other copper, are both attached to a steam chamber as shown in the figure, with a temperature of 100°C, at one end, and an ice water bath, with a temperature of 0°C, at the other
The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. When steady state has been reached, how much heat flows through the two rods in 1.0 min? The thermal conductivity of silver is 417 W/(m ? K), and that of copper is 395 W/(m ? K). No heat is exchanged between the rods and the surroundings, except at their ends. A) 20 kJ B) 39 kJ C) 47 kJ D) 49 kJ E) 11 kJ
Which of the following is true about Bragg planes?