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4 years ago

Lenny loves physics and math. In which Energy career pathway would these interests be the most helpful?

Physics

2 answers:

vazorg [7]4 years ago

3 0

Answer:

it is D

Explanation:

cause i took the test

worty [1.4K]4 years ago

3 0

Answer:

The correct answer is d = transmission

Explanation:

Hello! Let's solve this!

The transmission of energy occurs when two particles collide and the energy of one is transmitted and accumulates with the energy that the other particle has. In order to study this subject, knowledge of physics and mathematics is very important.

The correct answer is d = transmission

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The amount of light that enters the pupil is controlled by the: retina. lens. inis.

nignag [31]

Answer: The amount of light that enters the pupil is controlled by the Iris

Explanation:

5 0

3 years ago

During most of its lifetime, s star maintains an equilibrium size in which the inward force of gravity on each atom is balanced

frez [133]

Answer:

$r_f=137493m$

$v=8638940m/s$

Explanation:

During this process the mass $M=2\times10^{30}Kg$ will be considered constant. We start from a radius $r_i=7\times10^8m$ and a period $T_i=30\ days=(30)(24)(60)(60)s=2592000s$ . The final period is $T_f=0.1s$ .

Angular momentum L is conserved in this process. We can use the formula $L=I\omega$ , where I is the momentum of inertia (which for a solid sphere is $I=\frac{2mr^2}{5}$ ) and $\omega=\frac{2\pi }{T}$ is the angular velocity, so we can write the star's angular momentum as:

$L=I\omega=\frac{2mr^2}{5}\frac{2\pi }{T}=\frac{4\pi mr^2 }{5T}$

Since $L_f=L_i$ we have:

$\frac{4\pi mr_f^2 }{5T_f}=\frac{4\pi mr_i^2 }{5T_i}$

Which can be simplified as:

$\frac{r_f^2 }{T_f}=\frac{r_i^2 }{T_i}$

Which means:

$r_f=\sqrt{\frac{r_i^2 T_f}{T_i}}=r_i \sqrt{\frac{T_f}{T_i}}$

Which for our values is:

$r_f=r_i \sqrt{\frac{T_f}{T_i}}=(7\times10^8m) \sqrt{\frac{0.1s}{2592000s}}=137493m$

And we calculate the speed of a point on the equator by dividing the final circumference over the final period:

$v=\frac{C_f}{T_f}=\frac{2\pi r_f}{T_f}=\frac{2\pi (137493m)}{(0.1s)}=8638940m/s$

3 0

4 years ago

The reaction of magnesium ribbon with oxygen.what is the product formed?

zaharov [31]

When oxygen reacts with magnesium thenMgO3 is formed.

Mg +O2----> MgO3

6 0

3 years ago

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 4.82 m/s in 1.98 s. Assu

Ann [662]

Great equation: distance = rate*time

So, distance run = 4.82 meters/second * 1.98 seconds = 9.5436 meters (round according to whatever the problem specifies, usually to the tenths or hundredths is sufficient).

This makes sense if you think about it since you are multiplying seconds with meters over seconds. The seconds cancel out, leaving you only the meters.

7 0

3 years ago

Light travels at 3.0 × 108 m/s in a vacuum and slows to 2.0 × 108 m/s in glass. What is the index of refraction of glass?

Slav-nsk [51]

We are asked to solve for the index of refraction and the formula is n = c/v where "n" represents the index of refraction, "c" represents the speed of light in the vacuum while "v" represents the speed of another medium.
In the problem, we have the given values below:
c = 3 x 10^8 m/s
v = 2 x 10^8 m/s
n =?

Solving for n, we have the solution below:
n = 3x10^8 / 2x10^8
n = 1.5

The answer is 1.5 for the index of refraction.

8 0

3 years ago

Read 2 more answers