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Inessa [10]
3 years ago
15

A truck going 15 km􏰀h has a head-on collision with a small car going 30 km􏰀h. Which statement best describes the situation

? (a) The truck has the greater change of momentum because it has the greater mass. (b) The car has the greater change of momentum because it has the greater speed. (c) Neither the car nor the truck changes its momentum in the collision because momentum is conserved. (d) They both have the same change in magnitude of momentum because momentum is conserved. (e) None of the above is necessarily true. 2. A small boat coasts at constant speed under a bridge. A heavy sack of sand is dropped from the bridge onto the boat. The speed of the boat (a) increases. (b) decreases. (c) does not change. (d) Without knowing the mass of the boat and the sand, we can’t tell.
Physics
1 answer:
zlopas [31]3 years ago
5 0

1. e) None of the above is necessarily true.

2.d) Without knowing the mass of the boat and the sack, we cannot tell.

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During a baseball game a pitcher threw a baseball, and the catcher, who was behind home plate, caught it. Which is true about th
shtirl [24]

Answer:

If the pitcher catches the ball after it has been hit by the hitter, but before it touches the ground, the hitter is out, and, if there are not yet three outs but there is a runner on the bases, the pitcher can try to get a second (or third) out by throwing the ball to the appropriate baseman.

Explanation:

The catcher plays behind home plate in a baseball . The catcher plays an important role in baseball game.  He is the main part of the battery with the pitcher. The catcher catches the pitches and help to call the game.

Catcher is the Best Baseball Position.

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Second Base is the Best Baseball Position.

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7 0
3 years ago
What is the speed of a wave that has a frequency of 2,400 Hz and a wavelength of 0.75
likoan [24]

Answer:

1800 m/s

Explanation:

The equation is v = fλ

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[ you did not give units for wavelength, I assumed it would be m/s]

6 0
3 years ago
Plz help me I will mark brainlieat Ques. Write down name and molecular formula of a
Rzqust [24]
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Increasing the salt concentration from 5000 to 10,000 ppm resulted in a slight decrease in the percent dye removal. The model’s results agreed well with these general trends.

7 0
3 years ago
a student pushes a box with a total mass of 50kg. what is the net force on the box if it accelerates 1.5 m/s^2?
Zielflug [23.3K]
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3 years ago
A northfield raider defensive back runs 20 m in 2.5 s what’s the average speed
Kaylis [27]
The average speed is 8 miles
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