In the Lewis symbol for an atom of bromine, there are ______________ (how many?) dots around the Br
Fill in the blank(s) with correct word
seven
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Work-Energy Theorem: Which requires more work, increasing a car's speed from 0 mph to 30 mph or from 50 mph to 60 mph?
A. 0 mph to 30 mph B. 50 mph to 60 mph C. It is the same in both cases.
The Pioneer probes carry what kind of physical time capsule?
A) a small engraved plaque B) a gold-plated record containing pictures, multilingual greetings and music C) a DVD containing pictures D) these probes do not carry a physical time capsule
One year is about _____ seconds while one day is exactly _____ seconds
a. 3.16 × 10^7, 86,400 c. 3.16 × 10^7, 8640 b. 5.26 × 10^5, 86,400 d. 1.04 × 10^6, 36,000
A car on a roller coaster starts at zero speed at an elevation above the ground of 26 m. It coasts down a slope, and then climbs a hill. The top of the hill is at an elevation of 16 m. What is the speed of the car at the top of the hill?
Neglect any frictional effects. A) 14 m/s B) 18 m/s C) 10 m/s D) 9.0 m/s E) 6.0 m/s