The main reason ocean tides exist is that Moon's pull is stronger
A) than the pull of the Sun.
B) on water closer to it than on water farther away.
C) on Earth's oceans than on Earth itself.
D) all of the above
Answer: B
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A long straight wire carries a current. A positive charge moves toward the wire in a direction perpendicular to the wire. The direction of the force on the charge will be
A. parallel to the wire opposite the direction of the current. B. parallel to the wire in the direction of the current. C. There is no force D. opposite the direction of the charge's velocity. E. in the direction of the charge's velocity.
Which of the following is not true for both the photon and the neutrino
a. Both are uncharged. b. Both have spin ?. c. Both can carry different amounts of momentum. d. Choose this answer if all of the above are true.
To save energy while you leave your warm house for a half hour on a cold day, turn the thermostat
A) down. B) up. C) to room temperature.
A car of mass 1689 kg collides head-on with a parked truck of mass 2000 kg. Spring mounted bumpers ensure that the collision is essentially elastic
If the velocity of the truck is 17 km/h (in the same direction as the car's initial velocity) after the collision, what was the initial speed of the car? A) 19 km/h B) 38 km/h C) 29 km/h D) 10 km/h