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Neko [114]
3 years ago
15

Cells & Cellular Processes

Physics
1 answer:
never [62]3 years ago
7 0

Answer:

one or more cells

Explanation:

I need to have 20 characters to submit lol

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Samantha is refinishing her rusty wheelbarrow. She moves her sandpaper back and forth 45 times over a rusty area, each time movi
Leviafan [203]

Answer:

W = 12.96 J

Explanation:

The force acting in the direction of motion of the sand paper is the frictional force. So, we first calculate the frictional force:

F = μR

where,

F = Friction Force = ?

μ = 0.92

R = Normal Force = 2.6 N

Therefore,

F = (0.92)(2.6 N)

F = 2.4 N

Now, the displacement is given as:

d = (0.12 m)(45)

d = 5.4 m

So, the work done will be:

W = F d

W = (2.4 N)(5.4 m)

<u>W = 12.96 J</u>

5 0
3 years ago
To lift a load of 100 kg a distance of 1 m an effort of 25 kg must be applied over an inclined plane of length 4 m. What must be
Troyanec [42]
Using conservation of energy law:-
∑ work in = ∑ work out
and work= force* displacement 
so when we wanted to move a 100kg a distance of 1m 
we multiplied 100*1 = work out
so work in should be equal to 100*g Joules, where g is the acceleration due to gravity.
so workout = 100*g = 25*g *x (divide both sides by 25*g)
x=4m 

by the same way:-
------------------------
work in = 100kg * 2m * g (m/s^2)= work out
so work out = 25*x*g = 200* g (divide both sides by 25*g)
x=8m
6 0
3 years ago
Read 2 more answers
Ian pushed a piano across the room with the correct amount of force. Which of newton’s laws is this?
Black_prince [1.1K]

Answer:

1st and 2nd

Explanation:

6 0
3 years ago
I need help on my physics homework number 2
Mademuasel [1]
If it's in motion in the bottom it's called kinetic energy. Which means energy in motion
5 0
3 years ago
Why are very high temperatures and pressures required for fusion to occur?
Ber [7]

Explanation:

to overcome the repulsion between the protons in the nuclei that join

7 0
3 years ago
Read 2 more answers
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