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3 years ago

WILL GIVE BRAINLIEST

Physics

1 answer:

Vladimir [108]3 years ago

7 0

Answer:

$2\:\mathrm{m/s^2}$

From Newton's 2nd Law, we have $\Sigma F=ma$ . Substituting given values, we have:

$40=20a,\\a=\frac{40}{20}=\boxed{2\:\mathrm{m/s^2}}$

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Hailey is preparing a debate on the benefits of using synthetic polymers over natural polymers, and she wants to create a list t

AURORKA [14]

Answer:

D. Synthetic polymers are inexpensive to produce.

Explanation:

Hailey should include that synthetic polymers are inexpensive to produce as a benefit of synthetic polymers.

Synthetic polymers are artificially produced. These polymers come about from petroleum oil. Their hydrocarbons are industrially worked to produce the long chain hydrocarbons to form polymers.

Most of these polymers are very cheap to produce and does not cost too much. This is why they almost found everywhere.

Explanation:

7 0

3 years ago

Read 2 more answers

A 5.0-kg box is pulled by a horizontal force F applied to the top of the box. When the box meets a low doorstep, it begins to ro

NARA [144]

Answer:

the required minimum magnitude of the force F is 21 N

Explanation:

Given the data in the question,

m = 5 kg

width = 60 cm

height = 80 cm

Let force is F represent in the image below,

so when the block about to rotate normal shifted to edge of cube

mg(w/2) = Fh

F = mg(w/2) / h

we know that g = 9.8 m/s²

we substitute

F = (5 × 9.8 ( 60/2)) / 70

F = (5 × 9.8 × 30 ) / 70

F = 1470 / 70

F = 21 N

Therefore, the required minimum magnitude of the force F is 21 N

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3 years ago

The number of times that a wave vibrates in unit is called

kari74 [83]

I believe it's frequency.

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4 years ago

I think these two are simple questions.. but I need help asap..... TT

frosja888 [35]

1) The average velocity is 56 m/min

2) The average velocity is -83 m/min

Explanation:

The average velocity of an object is given by

$v=\frac{d}{t}$

where

d is the displacement (change in position)

t is the time elapsed

In the graph in the problem, the displacement corresponds to the distance, therefore to the change in the y-variable ( $\Delta y$ ), while the time elapsed is the change in the x-variable ( $\Delta x$ ), so the average velocity can be written as