3 years ago

What is the speed of a wave with a wavelength of 2 m and a frequency of 9 Hz?

Physics

1 answer:

ale4655 [162]3 years ago

7 0

Answer:

The speed of a wave would be 18 with a wavelength of 2 m and a frequency of 9 Hz.

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Suppose I produce radio waves with an antenna that have a peak electric field amplitude E and peak magnetic field amplitude B. I

denis23 [38]

Answer:

Correct answer is 2B

Explanation:

The electric field magnitude and magnetic field magnitude in an electromagnetic waves are related as under

$E=cB$

where 'c' is velocity of light in the medium of transmission

According to the given question if we double the electric field we have

$2E=cB'\\\\2cB=cB'\\\\B'=2B$

Thus the magnetic field also doubles

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3 years ago

How much energy is required to vaporize 100g of water at its boiling point?

Karolina [17]

Latent heat fusion(l)=540

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Q=ml+ms∆T

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3 years ago

What is the total distance that the object traveled?

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Answer:

for what?

Explanation:

d=S x T

d=vt+1/2at2

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3 years ago

What is kinematics? explain!! ~ thankyou ~

Novay_Z [31]

Answer:

Kinematics is the study of motion of a system of bodies without directly considering the forces or potential fields affecting the motion.

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3 years ago

Read 2 more answers

A ball is thrown vertically upward from the top of a building 112 feet tall with an initial velocity of 96 feet per second. The

nordsb [41]

Answer:

$t=6.96s$

Explanation:

From this exercise, our knowable variables are hight and initial velocity

$v_{oy}=96ft/s$

$y_{o}=112ft$

To find how much time does the ball strike the ground, we need to know that the final position of the ball is y=0ft

$y=y_{o}+v_{oy}t+\frac{1}{2}gt^{2}$

$0=112ft+(96ft/s)t-\frac{1}{2}(32.2ft/s^{2})t^{2}$

Solving for t using quadratic formula

$t=\frac{-b±\sqrt{b^{2}-4ac } }{2a}$

$a=-\frac{1}{2} (32.2)\\b=96\\c=112$

$t=-0.999s$ or $t=6.96s$

Since time can't be negative the answer is t=6.96s

7 0

3 years ago