How to find the period of a wave

Answers

Answer 1

Answer: The method to choose depends on what information you have, and
on what you can measure. Here are a few possible methods:

-- Measure the period. Start your clock when one peak
of the wave passes you. Stop the clock when the next
peak passes you. The time between the two peaks is
the wave's period.

-- Divide the wave's wavelength by its speed. That quotient
is the wave's period.

-- Use an electronic frequency meter to measure the wave's
frequency. Then take its reciprocal (divide ' 1 ' by it). The
result is the wave's period.

Related Questions

2. A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. Of r = 21.5 m, how fast is the roller coaster traveling at the bottom of the dip?
What is the mass of a falling rock if it produces a force of 147 N with an acceleration of 9.8 m/s2?
What is Newton’s second law of motion
How much energy ( in joules ) is released when 0.06 kilograms of mercury is condensed to a liquid at the same temperature ? A. 697.08 J B. 17,705.1 J C. 20,075.04 J D. 51,302.88 J Please include how you got your answer , thank you.
Both retinal disparity and convergence increase as an object gets closer to the individual.

A 55kg female bungee jumper fastens one end of the cord (made of elastic material) to her ankle and the other end to a bridge. Then she jumps off the bridge. As the cord is stretching it exerts an elastic force directed up on her. Calculate her acceleration at the instant the chord exerts an elastic force of 825N [up] on her.

Answers

Downward force = gorce of gravity (her weight) = 55 x 9.8 = 539 newtons / / / Upward force = 825 newton. / / / Net force = 825 - 539 = 286 newtons upward. / / / F = m a / / / a = f / m = 286 / 55 = 5.2 meters per second squared Upward. / / / Note: We don't know the length of her fall before the bungee kicks in. At the moment we're dealing with, when her acceleration is 5.2 m/s-squared Upward, her velocity can very well be Downward.

When the jumper jumps off , there is always a force of gravity acting on her which is 55*9.8 =539N downwards. (Considering the acceleration due to gravity to be 9.8)
Since the question says that the force exerted by cord is 825N upwards , it is obvious that the pseudo force of acceleration must act downwards and the jumper must be moving upwards.
Assume the acceleration at that instant be 'a' .
Pseudo force = mass * acceleration = 55*a
Since the body is in dynamic equilibrium , all forces must cancel out.
Hence ,
539 +55*a = 825
=> 55*a = 825-539 = 286
=> a = 286/55 = 5.2
So , acceleration at that instant was 5.2 m/s²

If the velocity of an object is changing, its momentum is also changing. true or false

Answers

It is absolutely true that when the velocity of an object changes, the momentum of the object also change. Momentum of any object is defined as the multiple of velocity of an object and the mass of the object. So we can easily deduce that momentum is directly proportional to velocity of an object if the mass of the object remains constant. So it can be seen that if the mass of the object does not change then any change in velocity is bound to have an effect on the momentum of the object. We can easily write the equation as momentum= mass x velocity.

What is another unit for momentum besides kg-m/s?
a. N
b. N-s
c. N-s2
d. N/s

Answers

'Newton-second' is dimensionally equivalent to 'kilogram-meter/second'.

A 0.89 kg ball is moving horizontally with a speed of 3.8 m/s when it strikes a vertical wall. The ball rebounds with a speed of 1.3 m/s. What is the magnitude of the change in linear momentum of the ball?

Answers

Answer:

The change in momentum, p = -4.539 kg-m/s

Explanation:

It is given that,

Mass of the ball, m = 0.89 kg

Initial speed of the ball, u = 3.8 m/s

Final speed of the ball, v = -1.3 m/s (as it rebounds)

Let p is the change in linear momentum of the ball. We know that the linear momentum is equal to the product of mass and velocity. It is given by :

$p=m(v-u)$

$p=0.89\ kg* ((-1.3)-3.8)\ m/s$

p = -4.539 kg-m/s

So, the change in linear momentum of the ball is 4.539 kg-m/s. Hence, this is the required solution.

a magnet is pushed into the center of a wire loop and then stops. what is the current in the wire loop when the wire stops moving? explain.

Answers

-- If the ends of the wire loop are open (not connected to anything)
then there's never any current in it, no matter what you do with the
magnet.

-- If there's some kind of conductor between the ends of the wire
loop, then

-- While you're pushing the magnet, a current is flowing in the wire.
The current creates a magnetic field around the wire, and some of
the energy you're using to push gets stored in the magnetic field.

-- When you stop pushing and the magnet stops moving, the energy
stored in the magnetic field keeps the current flowing in the wire for
a short time, and then everything stops.

This all happens so fast, and lasts for such a short time, that you'd
never notice it unless you were set up with special equipment to
measure it.

Which of these objects would show the greatest parallax?a. the Sun
b. Mars
c. the Moon
d. Polaris
What is the distance an object would be from Earth if its parallax were one arcsecond?
a. a parsec
b. a light-year
c. an arcminute
d. an angular diameter

Answers

The sun's parallax would be 180 degrees, greater than which you can't get.

If an object exhibits a parallax of 1 arc second, then its distance from us
is called one 'parsec'. That distance is about 3.26 light-years.

Other Questions

A compass needle normally points toward Earth’s magnetic pole, which is near the North Pole. Which best explains why the needle moves away from the pole when it comes close to a current-carrying wire?-Current within the wire weakens the magnetic force of the pole. -Magnetism surrounding the wire weakens the magnetic force of the pole. -Magnetism surrounding the wire draws the needle toward the wire.

Which is occurring when work is being done? energy is being reverted. energy is being decreased. energy is being increased. energy is being transferred.?

Which energy source is formed when organic matter is trapped underground without exposure to air or moisture?A. natural gas B. coal C. oil D. biomass fuels

what is the kinetic energy of an object that has mass of 30 kilograms and move with a velocity of 20 m/s