All categories

4 years ago

PLEASE PLEASE PLEASE HELP!!!! WILL MARK BRAINILIEST!!!!!!!!!!!

Physics

1 answer:

xxTIMURxx [149]4 years ago

6 0

Answer:

The purpose of our major is to deepen knowledge and understanding of one of the most powerful forces operating on people, communities and corporations today, namely government and politics in the USA and around the world. This knowledge and understanding is valuable for all citizens.

You might be interested in

What is the reflectivity of a glass surface (n =1.5) in air (n = 1) at an 45° for (a) S-polarized light and (b) P-polarized ligh

Goshia [24]

Answer:

a) $R_s = 0.092$

b) $R_p = 0.085$

Explanation:

given,

n =1.5 for glass surface

n = 1 for air

incidence angle = 45°

using Fresnel equation of reflectivity of S and P polarized light

$R_s=\left | \dfrac{n_1cos\theta_i-n_2cos\theta_t}{n_1cos\theta_i+n_2cos\theta_t} \right |^2\\R_p=\left | \dfrac{n_1cos\theta_t-n_2cos\theta_i}{n_1cos\theta_t+n_2cos\theta_i} \right |^2$

using snell's law to calculate θ t

$sin \theta_t = \dfrac{n_1sin\theta_i}{n_2}=\dfrac{sin45^0}{1.5}=\dfrac{\sqrt{2}}{3}$

$cos \theta_t =\sqrt{1-sin^2\theta_t} = \dfrac{sqrt{7}}{3}$

a) $R_s=\left | \dfrac{\dfrac{1}{\sqrt{2}}-\dfrac{1.5\sqrt{7}}{3}}{\dfrac{1}{\sqrt{2}}+\dfrac{1.5\sqrt{7}}{3}} \right |^2$

$R_s = 0.092$

b) $R_p=\left | \dfrac{\dfrac{\sqrt{7}}{3}-\dfrac{1.5}{\sqrt{2}}}{\dfrac{\sqrt{7}}{3}+\dfrac{1.5}{\sqrt{2}}} \right |^2$

$R_p = 0.085$

3 0

3 years ago

Describe at least three measures that ensure safety and prevent injury during a workout.

KonstantinChe [14]

Water - helps with dehydration.
instruction - help you understand how you need to do the workout.
trainers - wether it's an online trainer or a gym trainer they always say how to be safe while working out.

5 0

3 years ago

Read 2 more answers

Due to design changes, the efficiency of an engine increases from 0.28 to 0.51. For the same input heat |QH|, these changes incr

Volgvan

Answer:

the ratio of the heat rejected to the cold reservoir for the improved engine to that for the original engine is 0.68

Explanation:

Given information

initial efficiency, η $_{1}$ = 0.28

final efficiency, η $_{2}$ = 0.51

ratio of the heat rejected = (1 - η $_{2}$ )/(1 - η $_{1}$ )

= (1 - 0.51)/(1 - 0.28)

= 0.68

4 0

3 years ago

What is the measure of the force that gravity applies to an object

GarryVolchara [31]

Answer:

Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy-including planets,stars,galaxies, and even light-are brought toward one another.

Explanation:

4 0

3 years ago

The force applied while lifting a box would be ?

V125BC [204]

Don’t quite know what answer you’re looking for since I can think off couple straight off the bat. But the best answer I can think of is maybe Kinetic energy? If that sounds wrong then sorry, I don’t quite know what it is you’re learning about

3 0

3 years ago