Physics, 12.02.2020 03:59 erieannapickett12
A rock is thrown from the upper edge of a tall cliff at some angle above the horizontal. It reaches its highest point and starts falling down. Which of the following statements about the rock's motion are true just before it hits the ground?
a. Its speed is the same as it was just as it was launched
b. Its horizontal velocity component is the same as it was just as it was launched
c. Its velocity is vertical.
d. Its vertical velocity component is the same as it was just as it was launched.
e. Its horizontal velocity component is zero.
Answers: 3
Physics, 22.06.2019 01:40, onegirl435
Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger
Answers: 1
Physics, 22.06.2019 16:40, jcblake
Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.
Answers: 2
Physics, 22.06.2019 16:50, fsugg9168
Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?
Answers: 2
Physics, 23.06.2019 08:00, samuribe17
How are elastic and inelastic collisions different? give two or more ways. your answer should have at least 2 sentences.
Answers: 1
A rock is thrown from the upper edge of a tall cliff at some angle above the horizontal. It reaches...
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