The Phoenix lander on Mars failed to confirm the presence of water ice under the surface

Indicate whether the statement is true or false


FALSE

Physics & Space Science

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A 6.0-kg object moving 5.0 m/s collides with and sticks to a 2.0-kg object. After the collision the composite object is moving 2.0 m/s in a direction opposite to the initial direction of motion of the 6.0-kg object. Determine the speed of the 2.0-kg object before the collision

a. 15 m/s b. 7.0 m/s c. 8.0 m/s d. 23 m/s e. 11 m/s

Physics & Space Science

The mass density of pure water is If the molecular mass of water is 18.0 u, how many water molecules are in spherical water balloon of radius 1.0 cm?

a.
b.
c.
d.

Physics & Space Science

The magnitude of the drag force of air resistance on a certain 20.0-kg object is proportional to its speed. If the object has a terminal speed 80.0 m/s, what is the magnitude of the drag force on the object when it is falling with a speed 30.0 m/s?

A) 196 N B) 7.50 N C) 15.0 N D) 73.5 N E) 42.7 N

Physics & Space Science

Jack rides a bicycle northward at 12 mph. Jill rides southward on the same road at 12 mph. As they pass each other

A) their speeds are identical and their velocities are identical. B) their speeds are identical but their velocities are different. C) their speeds are different but their velocities are identical. D) their speeds are different and their velocities are different. E) theoretical physics predicts, surprisingly enough, that they will turn into giant frogs.

Physics & Space Science