To calculate the frequency of a electro magnetic wave what do you need?

Answer:

vry true

Explanation:

yes because ll thoes give you protien sorry for my bad spelling

Answer:

True

I Had this before

Answer:

L = 6 m n = 3 f = 45/10 = 4.5 Hz → T = 1/f = 0.22 s

wavelength = 2L/n = 2×6÷3= 4 m

speed(v) = wavelength × f = 4×4.5 = 18 m/s

Explanation:

second solution for frequency:

f= speed(v) / wavelength = nv/2L = 3×18÷(2×6) = 4.5 Hz

Answer:

your answer is at Cbsd.org

Answer:

M = 500 J

Explanation:

Given that,

Mass, M = 1000 g = 1 kg

Height, h = 10 m

Potential energy is given by :

P = mgh

P = 1×10×10

P = 100 J

The kinetic energy at ground = 400 J

Mechanical energy = sum of kinetic and potential energy

So,

M = 100 + 400

M = 500 J

So, the mechanical energy of the system is 500 J.

Answer:

0.16 rad /s

Explanation:

Given that :

Time, t = 9.46 s

Quarter turn = 1/4 rev

θ = wt

w = angular speed `. ; t = time in second

1 rev = 2 pi

θ = 2pi

1/4 θ = 1/4 * 2pi = pi/2

θ = wt

pi/2 = w * 9.62

3.14 = w * 9.62 * 2

3.14 = 19.24w

w = 3.14 / 19.24

w = 0.1602040

w = 0.16 rad /s

Answer:

b. heat

Explanation:

Laser light has a great deal of heat energy. The correct option is B.

A laser is a device that emits light via an optical amplification process that is based on the stimulated emission of electromagnetic radiation. Light amplification by stimulated emission of radiation is an acronym for the term.

A laser generates a very narrow beam of light that can be used in a variety of technologies and instruments. Laser is an acronym that stands for Light Amplification by Stimulated Emission of Radiation.

The radiation coming from the laser light has a large amount of heat due to the presence of the electrons streamed in the form of an electromagnetic wave.

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Answer: -2.5 kg/m/s

Explanation: Momentum is equal to mass times velocity, so you do 0.5 kg times -5 m/s, and you get -2.5 kg/m/s.

Answer:

-100 kg · m/s

Explanation:

We can find the momentum of an object using the formula:

Let's start by converting the mass of the object to kilograms.

Since the left direction is the negative direction, we know that the velocity of the object is -25 m/s.

Using these variables, we can solve for p in the formula.

The momentum of the object is -100 kg · m/s.

Answer:

Yep.

Explanation:

In physics, the kinetic energy of an object is the energy that it possesses due to its motion. Gravity will pull the object down. So yes, gravity affects kinetic energy.

Answer:

Kinetic energy is energy an object has because of its motion. A ball held in the air, for example, has gravitational potential energy. If released, as the ball moves faster and faster toward the ground, the force of gravity will transfer the potential energy to kinetic energy.

Explanation:

Answer:

It is called reverberation.

Explanation:

The phenomenon of prolongation of sound is the process in which sound produced is reflected from plane surfaces in a continuous manner, which leads to reverberation of sound waves. It can also be referred to as a condition of continuous echo production.

It occurs when sound produced get reflected from a hard plane surface, and in the process hits another surface and another reflection occurs. This continuous reflection leads to prolongation of sound.

The sound produced is heard for some specific period of time before it dies down or get absorbed finally.

Answer:

Force = 20.08 x 10⁴⁷ N

Explanation:

Given:

M1 = 6 × 10²⁴ kg (rectified)

M2 = 7.4× 10²² Kg

Radius r = 3.84 × 10⁵ km

G = 6.67×10¹¹ Nm² / kg²​

Find:

Force

Computation:

F = GM1M2 / r²

Force = [(6 × 10²⁴)(7.4× 10²²)(6.67×10¹¹ )] / (3.84 × 10⁵)²

Force = [296.148 × 10⁵⁷] / [14.7456 × 10¹⁰]

Force = 20.08 x 10⁴⁷ N

Answer:

A) 7.0 m/s²

Explanation:

Acceleration is found by using the formula:

This means the change in time divided by the time interval will give us the car's acceleration.

Since the car starts from rest, its initial velocity is 0 m/s. Its final velocity is 35 m/s. The time interval for the car to go from 0 to 35 m/s is 5.0 seconds.

Substitute the final and initial velocity into the formula.

The acceleration of the car is A) 7.0 m/s².

Answer:

If it accelerated from 5 to 10 in one second then we know that acceleration is final (velocity-initial velocity)/

time

this gives (10-5)/1

=5m/s^2

force = mass x acceleration so = 150 x 5

this gives us a force of 750N

impulse is force x time so = 750 x 1

this tells us the impulse is 750 N.s

All of this is assuming it accelerated to 10m/s in one second.

The definition of impulse allows to find the impulse response for the acceleration of the body is:

Given parameters

To find

The impulse is the change of the momentum of a body, it is a vector quantity

    I = ∫ F. dt = Δp

Where the bold indicate vectors, I is the momentum, F the force, t the time, Δp the change in moment

The momentum is defined as the product of the mass of the body and its speed.

     p = m v

We substitute in the expression of impulse  

    I = [tex]m v_f - m v_o[/tex]  

Let's calculate.

    I = 150 (10 -5)

    I = 750 N s

In the direction of acceleration.

In conclusion using the definite of impulse we can find the impulse response for the acceleration of the body is:

Learn more here:  brainly.com/question/15652768

Answer:

23481.78 W

Explanation:

The computation of number of watts of power is shown below:

M = 978 kg

V = 4.9 m/s

Theeta = 60°

As we know that  

 P = Fcos(theeta).V

F = Mg

P = (Mg)cos(theeta).V

P = 978×9.8×cos(60)×4.9

P = 23481.78 W

Power = [tex]\frac{Work}{Time}[/tex]

Delilah: 170J/30s = 5.66 W

Adam: 260J/20s = 13 W

Answer:

i do believe you got them all right

good job :)

good luck :)

i hope this helps

have a great day !!

Answer:

._.

Explanation:

Answer:

a

Explanation:

thats yes according to kinematics

Answer:

Velocity is a vector (it has magnitude and direction), so the overall velocity of an object can be found with vector addition of the x and y components: v2 = vx2 + vy2. The units to express the horizontal and vertical distances are meters (m).

Answer:

graph A

Explanation:

the slope of the distance-time graph is speed, speed is a scalar (with magnitudes but no direction)

but the slope for the velocity time graph is acceleration, acceleration is vector quantity ( has magnitude and direction)

Answer:

Hey mate....

Explanation:

This is ur answer.....

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Answer:

It would take 1 s to hear the echo.

Explanation:

Here, the sound covered a total of 340 meters, since it bounces off the canyon wall and travels back to Miles in the form of echo.

The time elapsed can be determined by,

v = [tex]\frac{2D}{t}[/tex]

⇒ t = [tex]\frac{2D}{v}[/tex]

where: v is the speed of sound in air (343 m/s), D is the distance of the nearest canyon (170 m).

So that,

2D = 2 x 170 = 340 m

Thus,

t = [tex]\frac{340}{343}[/tex]

 = 0.9913 s

t = 1 s

It takes 1s for Miles to hear his echo.

water level will decrease because there are more evaporation and transpiration

Answer:

0.8sec

Explanation:

Σf= 7.5-5= 2.5 N to the left

Σf=m*a=>2.5=2a=>a=1.25 m/s²

Lets say that the speed is 1m/s

a=speed-0/x=>x=1/1.25=>x=0.8

Hence the time will be 0.8sec

Answer:

The energy used in the pendulum is the initial Potential (Mechanical) Energy, P.E. given to the Clay ball attached to the inclined and extended string by virtue of its elevated position in relation to the rest position (lower state)

The swinging of the pendulum is brought about by the dynamic equilibrium between the initial potential energy, P.E. and the Kinetic Energy, K.E., of the pendulum when it is in motion

The (total) Mechanical Energy, M.E. of the ideal pendulum is constant at all times during the motion of the pendulum and it is given by the following formula;

M.E. = P.E. + K.E.

At the top of the swing, P.E. is maximum and K.E. is zero

Similarly, at the mid (lowest) point in the swing, instantaneously, P.E. is zero and K.E. is maximum

Explanation:

Answer: 1 m/s/s

Explanation: One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.

Answer:

the answer is A

Explanation: