Explain what is meant by saying a thermometer measures its own temperature
What will be an ideal response?
Answer: Objects in the same locality will ultimately reach the same temperature when hot things cool and cool things warm. Likewise for a thermometer that cools or warms to the temperature of the object of contact. It reaches thermal equilibrium with its surroundings, which is displayed on its scale.
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Resistors in Combination: What resistance must be connected in parallel with a 633-? resistor to produce an equivalent resistance of 205 ??
Fill in the blank(s) with the appropriate word(s).
You obtain a 100. W lightbulb and a 50. W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?
A) Both bulbs glow at the same increased brightness. B) The 100-W bulb glows brighter than the 50-W bulb. C) Both bulbs glow at the same reduced brightness. D) The 50-W bulb glows more brightly than the 100-W bulb.
On average, active galaxies are rare and most are fairly distant from us
Indicate whether the statement is true or false
What is the total energy of a 300-g mass that is attached to a horizontal spring with a force constant of 260 N/m and oscillates along a frictionless horizontal surface with an amplitude of 8.0 cm?
A) 21 J B) 0.83 J C) 2.4 J D) 1.6 J E) 6.2 J