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4 years ago

I need help FAST!!! It’s on my grade

Physics

1 answer:

Stells [14]4 years ago

3 0

Solar energy, because of solar panels, hydroelectricity from a dam, or fossil fuels. fossil fuels would be the most ideal because it is more commonly used

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Jerome plays middle linebacker for souths varsity football team. In a game against cross-town rival north, he delivered a hit to

AlladinOne [14]

Answer:

The change in momentum is <u>664.2 kgm/s in the westward direction</u>.

Explanation:

Considering eastward direction as positive and westward direction as negative.

Given:

Mass of the running back is, $m=82\ kg$

Initial velocity of the running back is, $u=5.6\ m/s$

Final velocity of the running back is, $v=-2.5\ m/s$

Now, we know that, momentum is given as the product of mass and velocity.

So, initial momentum of the running back is given as:

$p_i=mu=82\times 5.6=459.2\ kgms^{-1}$

Final momentum of the running back is given as:

$p_f=mv=82\times -2.5=-205\ kgms^{-1}$

Now, change in momentum is given as the difference of final momentum and initial momentum.

Change in momentum = Final momentum - Initial momentum

⇒ $\Delta p=p_f-p_i$

⇒ $\Delta p=-205 - 459.2 = -664.2\ kgms^{-1}$

Therefore, the change in momentum is 664.2 kgm/s in the westward direction as the value is negative.

6 0

3 years ago

On a particle level, what happens when thermal conduction occurs within a liquid?

Elodia [21]

B sounds perfect to me

4 0

4 years ago

Read 2 more answers

A carpet is to be installed in a room of length 9.72 meters and width 17.30 of the room retaining the proper number of significa

Usimov [2.4K]

Answer:

168 m^2, 380 m^2

Explanation:

length of the room, l = 9.72 m

width of the room, b = 17.30 m

Area of teh rectangle is given by

A = length x width

So, A = 9.72 x 17.30 = 168.156 m^2

the significant digits should be 3 in the final answer

So, A = 168 m^2

Now length = 72 m

width = 17.39 feet = 5.3 m

Area, A = 72 x 5.3 = 381.6 m^2

There should be two significant digits in the answer so, by rounding off

A = 380 m^2

3 0

3 years ago

Which best describes longitudinal waves?

RUDIKE [14]

The right answer for the question that is being asked and shown above is that: "A. Compressions and rarefactions make up longitudinal waves, which can only travel in matter." The statement that best describes longitudinal waves is that c<span>ompressions and rarefactions make up longitudinal waves, which can only travel in matter.</span>

3 0

3 years ago

Electron (-) has a charge of 1.6 x 10-19 C. Proton (+) has a charge of 1.6 x 10-19 C. In a hydrogen atom the distance between a

gladu [14]

Answer:

c because you can lift a 2 pound dumbell

7 0

4 years ago