A standing wave has a frequency of 471 Hz and a wavelength of 1.9. What is the speed of thewave? (Round to the 2nd number after the decimal)
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I REALLY NEED HELP !

Answers

Answer 1
Answer:

Answer:

c = 894.90 m/s

Explanation:

Given data:

Frequency of wave = 471 Hz

Wavelength of wave = 1.9 m

Speed of wave = ?

Solution:

Formula:

Speed of wave = frequency × wavelength

c = f×λ

c = 471 Hz × 1.9 m

  Hz = s⁻¹

c = 471s⁻¹ × 1.9 m

c = 894.90 m/s

The speed of wave is 894.90 m/s.


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If Mr. Kirwan’s pet Fluffy the Wonder Hamster rides his unicycle at a rate of 5m/s to thenorth on a flatbed train car. Under what conditions do you see him moving at 5 m/s?

Answers

The condition that would induced the seer or observer to see that the pet hamster is moving at 5 m/s is when the train is also moving at that speed. This is because the unicycle will only allow limited vision to the seer thinking that the pet hamster is not moving at that speed. 

In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80m/s2 . Ignore air resistance. A flea jumps straight up to a maximum height of 0.460m . What is its initial velocity v0 as it leaves the ground?

Answers

As the flea jumps and leaves the ground, its speed is 'V₀'.

When the flea reaches its maximum height, its speed is zero.
(That's why it doesn't go any higher than that.)

Its average speed all the way up is

                      (1/2) (V₀ + 0)  =  V₀ / 2 .

  The time it takes for the original speed to dribble down to zero is

                                    V₀/g  =  V₀/9.8 .

Distance covered = (Average speed) x (time in motion)

              0.46 m  =               (V₀/2)   x   (V₀/9.8) 

               0.46  =    V₀² / 19.6

                   V₀²  =  (0.46 x 19.6)  =  9.016

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xf = xi + vi(t) + 1/2(a)t^2. 

0 = 0 + 2.62(t) + 1/2(-9.81)t^2 
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t = 0.534. 

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Answers

EXPLANATION :

As per the question, the electron has jumped from ground state to higher energy level.

From Bohr's postulate, we know that electron can only move to higher excited state when the energy equivalent to excitation energy has been given to it. Otherwise, the electron can not move from ground state to the excited state.

Hence, it is obvious that the electron might have excited to higher energy level by providing sufficient energy from outside.

The external source might be light of suitable frequency or  any electric or thermal source.


Measuring the amount of deuterium in the universe allows us to set a limit on _________.

Answers

Answer:

the density of ordinary (baryonic) matter in the universe

Explanation:

 Deuterium detection is of interest because the amount of it may be related to the amount of dark matter in the universe, but precise measurements have been difficult to obtain. Due to the way in which deuterium was created in the Big Bang, an exact measurement of the amount of deuterium would allow scientists to set limits on the models of the great explosion.

Also, an exact measure of deuterium would be an indicator of the cosmic density of barions (ordinary matter), and that density of barions would indicate whether ordinary matter is dark and is found in regions such as black holes, gas clouds or brown dwarfs, or it is bright and can be found in the stars. This information will help scientists who try to understand the very beginning of our universe.

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Answers

The correct answer is (d.) Coulomb's law. the Coulomb's law describes why a charged object attracts another object even though they are not in contact. The Coulomb's law is a law of physics in which describing how the electrostatic interaction happens between electrically charged particles. 

Longitudinal waves compress the medium they travel though. One example of a longitudinal wave is a

Answers

Answer: Waves in compressed string

Explanation:

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Longitudinal wave can occur in compressed string. A compressed string displaced horizontally will transmit wave in the same horizontal direction. That's why they are longitudinal waves.

Answer:

It is sound waves

(I did USAtestprep)

Explanation: