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3 years ago

What is the formula for calculating wave speed?

2 answers:

6 0

Wavelength is also measured in meters (m) - it is a length after all. The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per second.

tatiyna3 years ago

4 0

Determine the frequency and the speed of these waves. The wavelength is 8.6 meters and the period is 6.2 seconds. Now find speed using the v = f. λ equation.

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What is an example of convection currents? a. marshmallows toasting over a campfire b. a pot being heated by an electric burner,

SCORPION-xisa [38]

Answer:

Explanation:

because, convection is the transfer of heat between fluid substances/materials

7 0

3 years ago

Read 2 more answers

How much mass should be attached to a vertical ideal spring having a spring constant (force constant)of 39.5 N/m so that it will

nordsb [41]

Answer:

m = 1 kg

Explanation:

Given that,

The force constant of the spring, k = 39.5 N/m

The frequency of oscillation, f = 1 Hz

The frequency of oscillation is given by the formula as formula as follows :

$f=\dfrac{1}{2\pi}\sqrt{\dfrac{k}{m}} \\\\f^2=\dfrac{k}{4m\pi^2}\\\\m=\dfrac{k}{4\pi^2 f^2}\\\\m=\dfrac{39.5}{4\pi^2 \times (1)^2}\\\\m=1\ kg$

So, the mass that is attached to the spring is 1 kg.

6 0

2 years ago

You are using a hydrogen discharge tube and high quality red and blue light filters as the light source for a Michelson interfer

boyakko [2]

Answer:

final displacement = +24484.5 nm

Explanation:

The path difference when 158 bright spots were observed with red light (λ1 = 656.3 nm) is given as;

Δr = 2d2 - 2d1 = 150λ1

So, 2d2 - 2d1 = 150λ1

Dividing both sides by 2 to get;

d2 - d1 = 75λ1 - - - - eq1

Where;

d1 = distance between the fixed mirror and the beam splitter

d2 = position of moveable mirror from splitter when 158 bright spots are observed

Now, the path difference between the two waves when 114 bright spots were observed is;

Δr = 2d'2 - 2d1 = 114λ1

2d'2 - 2d1 = 114λ1

Divide both sides by 2 to get;

d'2 - d1 = 57λ1

Where;

d'2 is the new position of the movable mirror from the splitter

Now, the displacement of the moveable mirror is (d2 - d'2). To get this, we will subtract eq2 from eq1.

(d2 - d1) - (d'2 - d1) = 75λ1 - 57λ2

d2 - d1 - d'2 + d1 = 75λ1 - 57λ2

d2 - d'2 = 75λ1 - 57λ2

We are given;

(λ1 = 656.3 nm) and λ2 = 434.0 nm.

Thus;

d2 - d'2 = 75(656.3) - 57(434)

d2 - d'2 = +24484.5 nm

5 0

3 years ago

What is the main difference between work power and energy

liubo4ka [24]

Answer:

Work is the energy required to move an object from one point to another. while power is the energy transferred per unit time.

Energy can also be defined as the ability to do work.

6 0

3 years ago

A skateboarder traveling at 4.45 m/s can be stopped by a strong force in 1.82 s and by a weak force in 5.34 s.

ANTONII [103]

1) Impulse: $-238.5 kg m/s$

2) Strong force: -131.1 N, weak force: -44.7 N

Explanation:

The impulse exerted on an object is equal to the change in momentum of the object itself.

Mathematically:

$I=\Delta p=m(v-u)$

where

m is the mass of the object

u is the initial velocity

v is the final velocity

For the skateboarder in this problem, we have:

m = 53.6 kg

u = 4.45 m/s

v = 0 (it comes to a stop)

Therefore, the impulse is

$I=(53.6)(0-4.45)=-238.5 kg m/s$

Where the negative sign indicates that the direction is opposite to the motion of the object.

The impulse is also equal to the product between the force applied and the duration of the collision:

$I=F\Delta t$

where

I is the impulse

F is the average force

$\Delta t$ is the time during which the force is applied

The strong force is applied in a time of

$\Delta t = 1.82 s$

Therefore this force is

$F=\frac{I}{\Delta t}=\frac{-238.5}{1.82}=-131.1 N$

The weak force is applied in a time of

$\Delta t = 5.34 s$

So this force is

$F=\frac{I}{\Delta t}=\frac{-238.5}{5.34}=-44.7 N$

Learn more about impulse:

brainly.com/question/9484203

#LearnwithBrainly

6 0

3 years ago