It's a hot sunny day and you decide to go for a drive. when you open your car door, it's a lot hotter inside than outside. why is that?
a).air pollutants entering the car make the inside warmer.
b).a greenhouse effect—heat was let in through the windows and some was trapped inside.
c).global warming—it's getting hotter everywhere you turn.
d).the hole in the ozone layer has caused higher temperatures.
Answers: 2
Physics, 22.06.2019 10:10
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Physics, 22.06.2019 10:10
Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.
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Physics, 22.06.2019 15:50
An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )
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Physics, 22.06.2019 17:40
Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.
Answers: 1
It's a hot sunny day and you decide to go for a drive. when you open your car door, it's a lot hotte...
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