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SVETLANKA909090 [29]

3 years ago

9

The energy attributed to an object by virtue of its motion is known as _______________. potential energy mass-energy radiative e

nergy orbital energy kinetic energy

1 answer:

Crazy boy [7]3 years ago

3 0

I think the answer is :
Kinetic energy.
hope it helps.

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At a fixed point, P, the electric and magnetic field vectors in an electromagnetic wave oscillate at angular frequency w . At wh

inn [45]

Answer:

Poynting vector oscillate at a frequency of 2omega

Explanation:

This is because The poynting vector is proportional to the cross product of electric and magnetic field vectors. So Because both fields oscillate sinusoidally with frequency w, trigonometric identities show that their product is a sinusoidal function of frequency of 2w.

4 0

3 years ago

if change in blood pressure between the brain and the feet is 1.88×10^4 pa .what will be the volume flow rate from head to feet

klio [65]

Answer: $3765.66 \frac{m^{3}}{s}$

Explanation:

We can solve this problem using the <u>Poiseuille equation</u>:

$Q=\frac{\pi r^{4}\Delta P}{8\eta L}$

Where:

$Q$ is the Volume flow rate

$r=23 cm \frac{1 m}{100 cm}=0.23 m$ is the effective radius

$L=6 ft \frac{0.3048 m}{1 ft}=1.8288 m$ is the length

$\Delta P=1.88(10)^{4} Pa$ is the difference in pressure

$\eta=3(10)^{-3} Pa.s$ is the viscosity of blood

Solving:

$Q=\frac{\pi (0.23 m)^{4}(1.88(10)^{4} Pa)}{8(3(10)^{-3} Pa.s)(1.8288 m)}$

$Q=3765.66 \frac{m^{3}}{s}$

4 0

3 years ago

After your school's team wins the regional championship, students go to the dorm roof and start setting off fireworks rockets. T

Nataliya [291]

Answer:

174m

Explanation:

We can calculate the power of the sound:

$P = IA = I \pi R^2 = 1.52\times10^{-6}*\pi*123^2 = 0.0722 W$

For the intensity to be half of I, then the cover area must be

$a = P/(I/2) = 2P/I = \frac{2*0.722}{1.52\times10^{-6}} = 95058 m^2$

Then the distance from the source center to this point is

$a = \pi r^2$

$r^2 = a / \pi = 95058 / \pi = 30258$

$r = \sqrt{30258} = 174 m$

4 0

3 years ago

Read 2 more answers

When people do "the wave" at a sports stadium, just like the particles of a real wave, each person _____.

mel-nik [20]

Sounds like C. A wave happens bellow the water and simply is energy pushing its way to something

7 0

3 years ago

Which statements describe acceleration? Check all that apply.

DiKsa [7]

Answer:

Negative acceleration occurs when an object speeds up in the negative direction.

Positive acceleration occurs when an object speeds up in the positive direction.

Explanation:

This might be wrong but I get some points for a answer..

8 0

2 years ago