Mary and Debra stand on a snow-covered roof. They both throw snowballs with the same initial speed, but in different directions.
Mary throws her snowball downward, at 30 below the horizontal; Debra throws her snowball upward, at 30 above the horizontal. Which of the following statements are true about just before the snowballs reach the ground below? (There could be more than one correct choice.) A) Debra's snowball will stay in the air longer than Mary's snowball.
B) Mary's snowball will stay in the air longer than Debra's snowball.
C) Both snowballs will take the same amount of time to hit the ground.
D) Debra's snowball has exactly the same acceleration as Mary's snowball.
E) Mary's snowball has a greater downward acceleration than Debra's snowball.
Question 2
A satellite with a rest mass of 200 kg and a speed of 0.800c and a second satellite with a rest mass of 100 kg and a speed of 0.600c are traveling toward each other in deep space. The satellites collide and somehow manage to stick together.
What is the rest mass of the combined object after the collision? A) 300 kg
B) 389 kg
C) 416 kg
D) 457 kg
E) 587 kg
Reindeer standing on snow to avoid blood-sucking insects.
Lioness in a burst of speed while hunting in the Serengeti
The hard palate is located anteriorly in the roof of the mouth
Distribution and Forms of Precipitation: Snow
Lake Effect Snow
When a 2.75-kg fan, having blades 18.5 cm long, is turned off, its angular speed decreases ...