Concept Development
Practice Page
20-1
Gases
1. A principle difference between a...
Physics, 04.05.2021 01:50, raekwonpowell10
Concept Development
Practice Page
20-1
Gases
1. A principle difference between a liquid and a gas is that when a liquid is under pressure, its
volume
(increases) (decreases) (doesn't change noticeably)
PHYSICS
and its density
SIGHS
(increases) (decreases) (doesn't change noticeably)
When a gas is under pressure, its volume
(increases) (decreases) (doesn't change noticeably)
and its density
(increases) (decreases) (doesn't change noticeably)
1
2. The sketch shows the launching of a weather balloon
at sea level. Make a sketch of the same weather balloon 1
when it is high in the atmosphere. In words, what is
different about its size and why?
1
1
Answers: 3
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An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.
Answers: 2
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In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain
Answers: 2
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