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3 years ago

Jenny is very nervous about giving her speech, and when she stands up in

Physics

1 answer:

timurjin [86]3 years ago

4 0

Answer:

Stage fright

Explanation:

Stage fear is one that a person experiences when he feels exposed to what others are going to say. This feeling is characterized by the fear of public speaking. Some common causes are large crowds or stress associated with an important presentation where people can stutter and do a poor job.

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Sayid drew an energy pyramid. What does each section of the triangle represent?

BaLLatris [955]

Pyramid of numbers: relative number of individual organisms at each trophic level in an ecosystem. Pyramids of energy show the relative amount of energy available at each trophic level. On average, about 10 percent of the energy available within one trophic level is transferred to the next trophic level.

HOPE THIS HELPED!!! XD

6 0

3 years ago

Read 2 more answers

When a ray of light passes at an angle to the normal from one material into another material in which its speed is higher?

Gnesinka [82]

I think your talking about refraction and if so the first medium it existed in before entering the second usually has the higher speed especially it the first medium is less denser than the second

4 0

4 years ago

What is the acceleration if a 5 kg cart is pushed with 30 N of force?

sp2606 [1]

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = \frac{f}{m} \\$

f is the force

m is the mass

From the question we have

$a = \frac{30}{5} \\$

We have the final answer as

Hope this helps you

3 0

3 years ago

In reading the instruction manual that came with your garagedoor opener, you see that the transmitter unit in your car produces

iVinArrow [24]

Answer:

0.09221 V/m

Explanation:

$\mu_0$ = Vacuum permeability = $4\pi \times 10^{-7}\ H/m$

P = Power of transmitter = 250 mW

r = Distance to source = 42 m

c = Speed of light = $3\times 10^8\ m/s$

$E_0$ = Electric field amplitude

Intensity of a wave is given by

$I=\frac{P}{4\pi r^2}\\\Rightarrow I=\frac{250\times 10^{-3}}{4\pi \times 42^2}\\\Rightarrow I=1.12779\times 10^{-5}\ W/m^2$

Intensity is also given by

$I=\frac{E_0^2}{2\mu_0 c}\\\Rightarrow E_0=\sqrt{I2\mu_0 c}\\\Rightarrow E_0=\sqrt{1.12779\times 10^{-5}\times 2\times 4\pi \times 10^{-7}\times 3\times 10^8}\\\Rightarrow E_0=0.09221\ V/m$

The electric field amplitude at the receiver when it first fails is 0.09221 V/m

3 0

4 years ago

. If an 8 N force pulled a 3.0 kg object to the left and a 5 N force pushed it to the right,

maxonik [38]

Answer:

8-5=3

The bigger force is to the left

3N to the left

Explanation:

7 0

1 year ago