Other than its atmosphere, name two properties of Venus that are unique among the terrestrial planets
What will be an ideal response?
Venus rotates clockwise and has not been shown to have a magnetic field.
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Collisions in Two Dimensions: Two dogs, Rover and Fido, run on a level frictionless surface. Rover runs eastward with a momentum of 24 kg . m/s, and Fido runs northward with momentum 10 kg . m/s. They make a sudden perfectly inelastic collision. What is the magnitude of their combined momentum after the collision?
A. 14 kg . m/s B. 26 kg . m/s C. 34 kg . m/s D. It cannot be determined without knowing the masses and velocities of the dogs.
Which statement about the cosmic microwave background is not true?
A) It is the result of a mixture of radiation from many independent sources, such as stars and galaxies. B) Its spectrum has the shape of an essentially perfect thermal radiation spectrum. C) With the exception of very small variations, it appears essentially the same in all directions in which we look into space. D) It is thought to be radiation that began its journey to our telescopes when the universe was about 380,000 years old.
Of normal matter, about 25% of it by mass is still primordial helium even today
Indicate whether the statement is true or false
A baseball player throws a ball straight up into the air. At a height of 3.00 m above the release point, the ball is moving at 1.25 m/s. What was the ball's initial speed?
a. 7.56 m/s b. 7.77 m/s c. 57.2 m/s d. 60.4 m/s