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2 years ago

15

A beam of light bends when it passes from air into water, and then bends even more when it passes from water into glass. What ca

n you conclude from this fact?.

1 answer:

Nikolay [14]2 years ago

4 0

Answer:

Certain Things Make Light Bend?

Explanation:

Transparent Objects/ things can make light bend when entering through it.

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Two ping pong balls have been painted with metallic paint and charged by contact with an Van de Graaff generator. The charge on

andre [41]

Answer:

0.035 N

Explanation:

Parameters given:

Charge q1 = -3.31x10^(-7) C

Charge q2 = -5.7x10^(-7) C.

Distance between them, R = 22 cm = 0.22 m

Electrostatic force between to particles is given as:

F = (k* q1 * q2) / R²

F = (9 * 10^9 * -3.31 * 10^(-7) * -5.7 * 10^(-7)) / 0.22²

F = 0.035 N

6 0

3 years ago

Read 2 more answers

If a single constant force acts on an object that moves on a straight line, the object's velocity is a linear function of time.

olya-2409 [2.1K]

Answer:

$F=mkv$

Explanation:

Given that

$v = v_i - kx$

We know that acceleration a given as

$a=\dfrac{dv}{dt}$

$v = v_i - kx$

$\dfrac{dv}{dt}=\dfrac{dv_i}{dt}-k\dfrac{dx}{dt}$

$\dfrac{dv}{dt}=0-k\dfrac{dx}{dt}$

We know that

$F=m\dfrac{dv}{dt}$

$F=-mk\dfrac{dx}{dt}$

$F=-mkv$

So the magnitude of force F

$F=mkv$

5 0

3 years ago

The hairdryer has a plastic case so there is no need for an earth wire connection in the plug.

kolbaska11 [484]

Gravitational attraction / field strength increases when closer; A light dependent resistor (LDR) can be used as a sensor to detect light intensity.

4 0

3 years ago

Which of the following cannot be used to describe a longitudinal wave?

alex41 [277]

Answer:

crest

hope It helped you!

8 0

2 years ago

The speed of light is now defined to be 2.99792458 10 m/s (a) Express the speed of light to three significant figures m/s (b) Ex

vazorg [7]

Answer:

a) 3.00×10⁸ m/s

b) 2.9979×10⁸ m/s

c) 2.997925×10⁸ m/s

Explanation:

299792458 m/s is the speed of light

Let us write this in scientific notation first

2.99792458×10⁸ m/s

a) In three significant figures

We need to round the number to the hundredths place

3.00×10⁸ m/s

b) In five significant figures

We need to round the number to the ten thousandths place

2.9979×10⁸ m/s

c) In seven significant figures

We need to round the number to the millionths place

2.997925×10⁸ m/s

8 0

3 years ago