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3 years ago

What is the difference between speed and velocity?

1 answer:

7 0

It’s C) because we know that velocity is a vector quantity with direction and speed is only quantity. For example, velocity could be 5 m/s to the east but speed would only be 5 m/s

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Red light of wavelength 630 nm passes through two slits and then onto a screen that is 1.4 m from the slits. The center of the 3

VARVARA [1.3K]

Answer:

Part a)

$f = 4.76 \times 10^{14} Hz$

Part b)

$d = 3.48 \times 10^{-4} m$

Part c)

$\theta = 0.311 degree$

Explanation:

Part a)

As we know that the speed of light is given as

$c = 3 \times 10^8 m/s$

$\lambda = 630 nm$

now the frequency of the light is given as

$f = \frac{c}{\lambda}$

so we have

$f = \frac{3 \times 10^8}{630 \times 10^{-9}}$

$f = 4.76 \times 10^{14} Hz$

Part b)

Position of Nth maximum intensity on the screen is given as

$y_n = \frac{n\lambda L}{d}$

so here we know for 3rd order maximum intensity

$y_3 = 0.76 cm$

n = 3

L = 1.4 m

$0.76 \times 10^{-2} = \frac{3(630 \times 10^{-9})(1.4)}{d}$

$d = 3.48 \times 10^{-4} m$

Part c)

angle of third order maximum is given as

$d sin\theta = 3 \lambda$

$3.48 \times 10^{-4} sin\theta = 3(630 \times 10^{-9})$

$\theta = 0.311 degree$

8 0

3 years ago

The pressure, p, of water (in pounds per square foot) at a depth of d feet below the surface is given by the formula p=15+15/33d

Viefleur [7K]

The pressure of the water on the diver is given in an expression written as:

<span>p=15+15/33d

where p is the pressure and d is the distance of the diver </span><span>below the surface.

The pressure is calculated as follows:

</span>p=15+15/33(100) = 15.00 pounds per square feet

Therefore, the correct answer is option A.

8 0

3 years ago

Read 2 more answers

If a pendulum has a period of 2.4 seconds what is the frequency?

REY [17]

We can use the equation $Peroid = \frac{1}{Frequency}$ to calculate the frequency.
Rearranging this gives us $Frequency = \frac{1}{Period}$ .
So the frequency is $\frac{1}{2.4}$ , which equals 0.42 hertz
(to 2 decimal places).

4 0

3 years ago

The rms current output in a circuit is 7.75 A. What is the maximum current?

Andru [333]

The maximum current in an ac circuit is related to the rms current by:
$I_{rms} = \frac{I_0}{ \sqrt{2} }$
where $I_{rms}$ is the rms current and $I_0$ is the maximum current.

If we re-arrange the formula and we use $I_{rms}=7.75 A$ , we can find the value of the maximum current:
$I_0 = \sqrt{2} I_{rms} = \sqrt{2}(7.75 A)=11.0 A$

5 0

3 years ago

According to Newton's second law, how are acceleration and mass related? Directly or indirectly when force is constant?

Aliun [14]

Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

4 0

3 years ago