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lutik1710 [3]
4 years ago
13

Which statements describe velocity and acceleration? Check all that apply. Velocity equals displacement divided by time. All vel

ocities are “instantaneous” and occur only at a point in time. Velocity and acceleration are calculated using the same variables. Acceleration equals change in velocity divided by time. Acceleration is always constant; it cannot vary. Average velocity can be found by using several velocities and their total time.
Physics
1 answer:
zzz [600]4 years ago
7 0

Answer:

Velocity equals displacement divided by time.

Acceleration equals change in velocity divided by time.

Average velocity can be found by using several velocities and their total time.

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An earthquake in San Francisco produces a wave with a period of 0.80 seconds and a wavelength of 40 m., How long will it take fo
gtnhenbr [62]

Answer:

A) 3.11 Hrs

Explanation:

Wave speed is given by the formula

Speed = \frac{wavelength}{Time\: period}

now we will have

speed = \frac{40}{0.80}

v = 50 m/s

now the time taken by the wave to move the distance 560 km is given as

t = \frac{distance}{speed}

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4 0
3 years ago
A thin film of cooking oil ( n = 1.47 ) is spread on a puddle of water ( n = 1.35 ) . What is the minimum thickness D min of the
zlopas [31]

Answer:

The minimum thickness of the oil is 77.55 nm

Explanation:

Given:

Refractive index of oil n_{o} = 1.47

Refractive index of water n_{w} = 1.35

Wavelength of light \lambda= 456 \times 10^{-9} m

From the equation of thin film interference,

The minimum thickness is given by,

    2n_{o} t = (n+\frac{1}{2}) \lambda

Where n = 0,1,2,3.........,t = thickness

Here we have to find minimum thickness so we use n = 0

     2n_{o} t  =( 0+\frac{1}{2} )\lambda

   t = \frac{\lambda }{4 n_{o} }

   t = \frac{456 \times 10^{-9} }{4 \times 1.47}

   t = 77.55 \times 10^{-9} m

   t  = 77.55 nm

Therefore, the minimum thickness of the oil is 77.55 nm

7 0
4 years ago
Experimental tests have shown that hammerhead sharks can detect magnetic fields. In one such test, 100 turns of wire were wrappe
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B = µo*N*I/2r  

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3 years ago
True or False. Light is a form of energy.
ExtremeBDS [4]

trueee...................

5 0
3 years ago
Read 2 more answers
Can somebody please explain to me how the acceleration in simple hormonic motion is proportional to the displacement..
Amanda [17]
When you graph simple harmonic motion in an acceleration versus displacement graph, the graph at any point would be linear. The graph would also pass through the origin giving proportionality of acceleration to negative displacement. Definition of proportionality neglects the negative value of the displacement so therefore acceleration is proportional to displacement. The acceleration of the motion is always directed towards equilibrium and so at maximum displacement, there would be greatest negative acceleration and vise versa.At the origin, the displacement would be zero and acceleration would also be zero
6 0
4 years ago
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