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3 years ago

Which two points on the wave shown in the diagram below are in phase with each other?

Physics

1 answer:

NNADVOKAT [17]3 years ago

8 0

Answer:

4. B and D

Explanation:

Two points along a transverse wave (such as the one in the figure) are said to be in phase when:

- the vertical position of the two points is the same

- The oscillation of the wave is going in the same way for both points

Basically, we say that two points are in phase when they are separated by a complete cycle (one complete oscillation) of the wave.

For this wave, we see that point B and C have same displacement, but they are not in phase since in B the oscillation is going down while in C is going up.

Instead, B and D are in phase, because they are separated by one complete cycle: both points have same displacement and the oscillation is going in the same way for both of them.

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Nadya [2.5K]

Answer:

Answer: Kelvin ________________

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3 years ago

Which of the following is the best example of kinetic energy being transformed into potential energy?

devlian [24]

Answer:

coasting down hill on a bicycle

Explanation:

Coasting down the hill on a bicycle is a typical example of how kinetic energy is being transformed to potential energy in a system.

Kinetic energy is the energy due to the motion of a body, it can be derived using the expression below;

K.E = $\frac{1}{2}$ m v²

Potential energy is the energy due to the position of a body. It can be derived using;

P.E = mgh

m is the mass

v is the velocity

g is the acceleration due to gravity

h is the height

Now, at the top of the hill, the potential energy is at the maximum. As the bicycle coasts down the potential energy is converted to kinetic energy.

6 0

3 years ago

Read 2 more answers

7.5 h

Julli [10]

The distance traveled by plane flying at 1200 Km/h for 2.5 hours is 3000 Km.

Velocity is a vector quantity. It has both a direction and a magnitude. Speed is used to calculate the magnitude of velocity. The meter per second is the S.I. unit for this. The units km/h and km/s are additional units. [LT-1] is the dimensional equation for it.

The distance traveled by the object is calculated as the product of the velocity with which it was moving and the time interval for which the distance covered is calculated.

Distance traveled = Velocity × Time

Given in the question

Velocity of the plane = 1200 Km/h

Time Traveled = 2.5 h

Put in the value, we get

Distance traveled = 1200 × 2.5

Distance traveled = 3000 Km

Hence, the distance traveled by plane flying at 1200 Km/h for 2.5 hours is 3000 Km.

LEARN MORE ABOUT VELOCITY HERE:

brainly.com/question/6504879

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7 0

1 year ago

In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron traveling with

Diano4ka-milaya [45]

Answer:

Wavelength, $\lambda=1.04\times 10^{-13}\ m$

Explanation:

It is given that,

Velocity of an electron, $v=7\times 10^6\ m/s$

Mass of an electron, $m=9.1\times 10^{-28}\ kg$

We need to find the wavelength of an electron. It can be calculated using the De- Broglie wavelength as :

$\lambda=\dfrac{h}{mv}$

$\lambda=\dfrac{6.63\times 10^{-34}}{9.1\times 10^{-28}\times 7\times 10^6}$

$\lambda=1.04\times 10^{-13}\ m$

So, the wavelength of an electron is $1.04\times 10^{-13}\ m$ . Hence, this is the required solution.

7 0

3 years ago

An electron and a proton, starting from rest, are accelerated through an electric potential difference of the same magnitude. in

Yakvenalex [24]

The charges are the same in absolute value, so the change of potential energy is the same. That means that the change in kinetic energy is also the same. Then:

1 = Ke/Kp = m_e *v_e^2 / m_p * v_p^2, or

v_e/v_p = sqrt( m_p/m_e),

So the speed of the electron will be sqrt( m_p/m_e) times greater than the speed of the proton

4 0

3 years ago