(Earth Science) Which statement about thunderstorms is correct?
A. Lightning is seen before thunder is heard.
B. Thunder can occur without lightning.
C. Thunder is heard before lightning is seen.
D. Lightning and thunder are not related to thunderstorms.

ANSWER KEY:
A. Lightning is seen before thunder is heard.
EXPLANATION:
The result of lightning is a loud booming noise, or thunder. Because sound travels at a much slower speed than light, people see lightning before
they hear thunder.

(Thought this might be helpful for other members via Penn foster online high school) =)

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

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