What is the temperature increase of 3.0 kg of water when heated by an 800-W immersion heater for 10 min? (cw = 4186 J/kg • °C)
a. 56°C
c. 29°C
b. 38°C
d. 14°C
B
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For there to be an acceleration, there must necessarily be a change in ______________
Fill in the blank(s) with correct word
How do we determine the conditions that existed in the early universe?
A) We work backward from current conditions to calculate what temperatures and densities must have been when the observable universe was much smaller in size. B) We look all the way to the cosmological horizon, where we can see the actual conditions that prevailed all the way back to the first instant of the Big Bang. C) The conditions in the very early universe must have been much like those found in stars today, so we learn about them by studying stars. D) We can only guess at the conditions, because we have no way to calculate or observe what they were.
An astronaut stands by the rim of a crater on the moon, where the acceleration of gravity is 1.62 m/s2
To determine the depth of the crater, she drops a rock and measures the time it takes for it to hit the bottom. If the time is 6.3 s, what is the depth of the crater? A) 10 m B) 14 m C) 26 m D) 32 m E) 38 m
The Greek letter designation conveys information about a star's location and brightness
Indicate whether the statement is true or false