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yulyashka [42]
3 years ago
11

Can you have constant speed with zero net force?

Physics
1 answer:
FinnZ [79.3K]3 years ago
6 0
Yes. Definitely the answer to this question defies the common sense of a layman in physics. However, common sense and intuition may lead you astray from the scientific path.
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A 0.45kg baseball is pitched towards home plate at 20 m/s. The ball is hit back towards the pitcher with a speed of 30 m/s. What
Inessa05 [86]

Answer:

4.5kgm/s

Explanation:

Change in momentum is expressed as

Change in momentum = m(v-u)

M is the mass

V is the final velocity

u is the initial velocity

Given

m=0.45kg

v = 30m/s

u = 20m/s

Substitute

Change in momentum = 0.45(30-20)

Change in momentum = 0.45×10

Change in momentum = 4.5kgm/s

3 0
2 years ago
The density of water is 1g/cm3. What is this in kg/m3? The density of water is 1g/cm3. What is this in kg/m3? Follow 3 answers 3
Lelu [443]
1 gram per cubic centimeter is equal to 1000 kilograms per cubic meter. Just multiply it with a 1000 and you have your solution.
8 0
3 years ago
A 320 g air track cart traveling at 1.25 m/s collides with a stationary 270 g cart. What is the speed of the 270 g cart after th
Nutka1998 [239]

Answer:

The speed of the 270g cart after the collision is 0.68m/s

Explanation:

Mass of air track cart (m1) = 320g

Initial velocity (u1) = 1.25m/s

Mass of stationary cart (m2) = 270g

Velocity after collision (V) = m1u1/(m1+m2) = 320×1.25/(320+270) = 400/590 = 0.68m/s

7 0
3 years ago
Which structures protect the cell? Check all that apply.
MAXImum [283]

Answer:

cell wall and cell membrane

8 0
2 years ago
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Help me asap and answer correctly!!!! Only answer if you know
dezoksy [38]

Answer:

B and D (Chicken and Turkey)

Explanation:

Looking at the table, we can see that chicken and turkey have an identical data set.

Good luck! Hope this helped!

7 0
1 year ago
Read 2 more answers
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