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4 years ago

PLEASE HELP ME I HAVE 2 MINUTES ON THIS! DO NOT GUESS!

Physics

2 answers:

11111nata11111 [884]4 years ago

4 0

Flat on her back, her whole body would be against the floor and she wouldn't have to do anything to hold herself up.

Murljashka [212]4 years ago

3 0

Yeah, she's right. Because in all the other positions, your muscles are working to keep yourself upright. But when you are laying down, you are using no muscles so you will cool off faster.

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What are the three elements that can be used to make a magnet?

Bess [88]

Answer:

Iron, cobalt, and nickel are the only three naturally occurring elements that are magnetic.

Explanation:

hope it helps

correct me if I'm wrong thank you

brainliest please

7 0

3 years ago

Read 2 more answers

One bright summer day a swimmer is floating with her head just above the surface of a large, clear lake where the water has inde

slavikrds [6]

Answer:

5.38035 m

Explanation:

$n_w$ = Refactive index of water = 1.43

h = Depth = 5.5 m

Critical angle is given by

$\theta_c=sin^{-1}\dfrac{1}{n_w}\\\Rightarrow \theta_c=sin^{-1}\dfrac{1}{1.43}\\\Rightarrow \theta_c=44.37^{\circ}$

d = horizontal distance from the post where she no longer see the bottom of wooden post

So,

$tan\theta_c=\dfrac{d}{h}\\\Rightarrow d=tan\theta_c\times h\\\Rightarrow d=tan44.37\times 5.5\\\Rightarrow d=5.38035\ m$

The distance d is 5.38035 m

4 0

3 years ago

If a wave vibrates back and forth 12 times each second, what is period of the wave?

Dmitrij [34]

Answer:

I think it might be 9 hz but not 100% shore though

Explanation:

7 0

3 years ago

A group of physics students hypothesize that for an experiment they are performing, the speed of an object sliding down an incli

goblinko [34]

Answer:

v = 2.974

Explanation:

Perhaps the formula should be

v = √(2*g*d (sin(θ) - uk*cos(θ) ) This is a bit easier to read.

v = √(2* 9.80*0.725(0.707 - 0.12*0.707) ) Substitute values. Find 2*g*d

v = √14.21 * (0.707 - 0.0849) Figure out Sin(θ) - uk cos(θ)

v = √14.21 * (0.6222)

v = √8.8422 Take the square root of the value

v = 2.974

6 0

4 years ago

Read 2 more answers

3. What conclusion can you make about the electric field strength between two parallel plates? Explain your answer referencing P

KIM [24]

Answer:

From the relation above we can conclude that the as the distance between the two plate increases the electric field strength decreases

Explanation:

I cannot find any attached photo, but we can proceed anyways theoretically.

The electric field strength (E) at any point in an electric field is the force experienced by a unit positive charge (Q) at that point

i.e

$E=\frac{F}{Q}$

But the force F

$F= \frac{kQ1Q2}{r^2}$

But the electric field intensity due to a point charge Q at a distance r meters away is given by

$E= \frac{\frac{kQ1Q2}{r^2}}{Q} \\\\\E= \frac{Q1}{4\pi er^2 }$

<em>From the relation above we can conclude that the as the distance between the two plate increases the electric field strength decreases</em>

6 0

3 years ago