While driving down the highway a lovebug spatters onto your windshield. Which undergoes the greater change in momentum during the time of contact?
A) the lovebug
B) your car
C) both the same
Answer: C
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Kepler's first law is about planets orbiting a host star in the shape of an ellipse with the host star at the center of the ellipse
a. True b. False Indicate whether the statement is true or false
It's cold. You are sitting on what appears to be a water ice-covered world. The Sun is low on the horizon and circles the horizon once every 24 hours
Despite the low Sun, you can almost "feel" the Sun's ultraviolet radiation on your exposed face because there is little ozone to protect you. Despite these discomforts, you are pleased to find that the air is quite satisfactory; oxygen seems plentiful and you are able to breathe even without the life-support belt.
Superguy is flying at treetop level near Paris when he sees the Eiffel Tower elevator start to fall (the cable snapped). His x-ray vision tells him Lois LaTour is inside. If Superguy is 1.00 km away from the tower, and the elevator falls from a height of 2.1 × 10^2 m, how long does Superguy have to save Lois, and what must be his average speed?
a. 4.5 s, 200 m/s c. 7.0 s, 140 m/s b. 6.5 s, 150 m/s d. 9.0 s, 110 m/s
At the end of the Paleozoic era, all
A) dinosaurs became extinct. B) flowering plants grew to great heights. C) fish species became extinct. D) trilobites became extinct.