A wave changing shape when passing through an opening is an example of what?

How do you find distance on a velocity time graph?

vekshin1

The region under the speed time chart gives the relocation.

In simple to-recall, straightforward terms, remove levels with the result of speed and time. So when you discover the region under a speed time diagram, you are really increasing speed and time. This gives the separation.

8 0

3 years ago

Which of the followings is true about EMF?

goldenfox [79]

Answer:

a. TRUTH

b. FALSE

c. TRUTH

d. FALSE

Explanation:

The emf (electromagnetic force) is generated in a loop or solenoid by the change in the magnetic flux in a closed conductor path (for example, a wire).

This can be noted in the following formula, which is known as the Lenz's law:

$emf=-N\frac{d\Phi_B}{dt}=-N\frac{d(AB)}{dt}$ (1)

Then, the change, in time, of the area of the conductor, or the change in the magnitude of the magnetic field, the induced emf acquires different values. Furthermore, the loops have a resistance, then, a current can be measured when an emf is induced.

Based on this information you have:

a. an induced emf is caused by a changing magnetic flux. TRUTH

b. an emf can only be induced in a conducting loop by moving the loop through an area that has a constant magnetic field. FALSE

c. an induced emf can be observed by measuring the current that is created. TRUTH

d. an induced emf and conventional induced current are in opposite directions. TRUTH (the minus sing in the equation (1) )

7 0

3 years ago

What part of the body receives the stimulus for vision

Nonamiya [84]

The nervous system is stimulus for the bodies vision

8 0

3 years ago

99 Points!!!!!! PLEASE Asap

Deffense [45]

Answer:

1) Joule

2) kgm²/s²

3) 10%

Explanation:

Question 1)

Luminosity is defined as the total amount of energy released from an object in a unit amount of time.

This means Luminosity is the ratio of energy and time.

Unit of Energy is Joules and Unit of Time is seconds, so unit of Luminosity would be Joule per second or Watts.

So, from the given options, the unit which would be used in Luminosity calculations is Joule.

Question 2)

Work = Force x Distance

SI unit of Work is Joule

SI unit of Force is Newton or kgm/s²

SI unit of Distance is meter(m)

Unit of Work = Unit of Force x Unit of Distance

Joule = kgm/s² x m

Joule = kgm²/s²

This means, the correct description of joule in terms of SI base units is kgm²/s²

Question 3)

Value of gravitational constant from the experiment = $7.34 \times 10^{-11}$ Nm²/kg²

The accepted or actual value of the gravitational constant = $6.67 \times 10^{-11}$ Nm²/kg²

We need to calculate the percentage error. Percentage error is defined as:

$\text{Percentage Error}=\frac{\text{New Value - Original Value}}{\text{Original Value}} \times 100\%$

Here, original value is the accepted value. Using the values in this formula, we get:

$\frac{7.34 \times 10^{-11}-6.67 \times 10^{-11}}{6.67 \times 10^{-11}}\\= 10\%$

Thus, this means the percentage error in the calculation of gravitational constant was 10%.

8 0

3 years ago

Mechanical waves travel faster through _______ than through _______.

sineoko [7]

The answer to the given problem is letter "B" solids, liquids. The mechanical waves travel faster though solids than through liquid because the particles in solid are very close and bonded together and it is easier for the signal to move and transfer.

7 0

3 years ago