Water can be turned to ice by

A) lowering the surrounding air pressure.
B) extracting energy.
C) both of these
D) neither of these


Answer: C

Physics & Space Science

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A person throws a ball horizontally from the top of a building that is 40.0 m high. The initial velocity of the ball is 100 m/s. What is the horizontal distance that the ball travels before hitting the ground?

A) 100 m B) 286 m C) 325 m D) 367 m E) 572 m

Physics & Space Science

The Heisenberg uncertainty principle states that

A) Planck's constant sets a limit on accuracy of measurements. B) we can't simultaneously measure exactly both the position and momentum of a particle. C) we can't simultaneously measure exactly a particle's energy and time having that energy. D) all of the above

Physics & Space Science

What are the two largest moons of Neptune and what makes them peculiar objects in our Solar System?

What will be an ideal response?

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A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = ?5.5 N/C, Ey = Ez = 0 . If the position and velocity of the particle at t = 0 are given by x = y = z = 0 and vx = 50 m/s, vy = vz = 0, what is the distance from the origin to the particle at t = 2.0 s?

a. 60 m b. 28 m c. 44 m d. 12 m e. 88 m

Physics & Space Science