3 years ago

Which of the following identifies the number of protons in an atom?

Physics

1 answer:

Lunna [17]3 years ago

8 0

Answer:

The number of protons can be found by looking at the atomic number

Explanation:

Its at the very top of the little element box

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Which of the following is a characteristic of active transport? Check all answers that apply.

vlada-n [284]

B. It moves substances against a concentration gradient. It requires energy from the cell to.

Hope this helps :)

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3 years ago

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How does heat reach to us from the sun<br><br><br>

patriot [66]

Answer:

heat reaches to us from the sun through radiation since there is no medium in space, radiation is the major wat heat travels in space.

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4 years ago

The water that powers the generators enters and leaves the system at a low speed (thus we can neglect its change of kinetic ener

madam [21]

Answer:

Explanation:

Let density of water be ρ .

During flow , volume of water flowing per second is constant

loss of P. E per unit volume = ρ gh , 83.5 % is lost

Gain of K E per unit volume = 1/2 ρ v²

83.5 % of mgh = ρ 1/2 ρ v²

1/2 ρ v² = .835 x 9.8

v² = 2 x .835 x 9.8

= 16.366

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4 years ago

I'm a car how does an air bag minimize the force acting on a person during a collision?

Sedaia [141]

The answer is B.It decreases the change of the momentum of the person

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3 years ago

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According to Newton's Brd Law, an object's momentum depends on it's velocity and mass, 4 dog-sled teams

Kryger [21]

Answer:

Team A has the greatest momentum

Explanation:

The momentum of an object is a vector quantity given by

$p=mv$

where

m is the mass of the object

v is its velocity

In this problem, we have to compare the momenta of the different sleds.

We have:

A) Sled Team A 48 kg moving at 10m/s:

m = 48 kg

v = 10 m/s

p = (48)(10) = 480 kg m/s

B) Sled Team B 14 kg moving at 18m/s

m = 14 kg

v = 18 m/s

p = (14)(18) = 252 kg m/s

C) Sled Team C 28 kg moving at 12m/s

m = 28 kg

v = 12 m/s

p = (28)(12) = 336 kg m/s

D) Sled Team D 22 kg moving at 12m/s

m = 22 kg

v = 12 m/s

p = (22)(12) = 264 kg m/s

So, team A has the greatest momentum.

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3 years ago