Physics, 10.09.2019 19:30, jahnoibenjamin

Light travels at a speed of about 300 000 km/s. a. express this value in scientific notation. b. convert this value to meters per hour. c. what distance in centimeters does light travel in 1 s? 6

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answered: Garry123

A. 3.0 × 10⁵ Km/sB. 1.08×10¹² m/hC. 3×10¹⁰ cm

A. Expression of 300000 km/s in scientific notation.

Scientific notation is a most reliable way of writing a very large or very small number in a convenient way.

To express 300000 km/s in scientific notation, move the decimal point from the last zero number to the non zero number. Include a multiple of 10 raised to power of the number of move as shown below:

Number to express = 300000 Km/s

The Non zero number is => 3

Number of moves = 5

Scientific notation = 3.0 × 10⁵ Km/s

Therefore, the scientific notation of 300000 Km/s is 3.0 × 10⁵ Km/s

B. Converting 300000 Km/s to m/h

We'll begin by converting 300000 Km/s to m/s. This can be obtained as follow :

1 Km/s = 1000 m/s

Therefore,

$300000 Km/s =\frac{300000 Km/s * 1000 m/s}{1 Km/s } \\$

300000 Km/s = 300000000 m/s

Finally, we shall convert 300000000 m/s to m/h

1 m/s = 3600 m/h

Thus,

$300000000 m/s = \frac{300000000 m/s * 3600 m/h}{1 m/s}$

300000000 m/s = 1.08×10¹² m/h

Therefore,

300000 Km/s = 1.08×10¹² m/h

C. Determination of the distance (in cm) travelled in 1 second.

We'll begin by converting 300000 km/s to cm/s.

This can be obtained as follow:

1 km/s = 100000 cm/s

Therefore,

$300000 km/s = \frac{300000 km/s * 100000 cm/s }{1 km/s} \\$

300000 km/s = 3×10¹⁰ cm/s

Finally, we shall determine the distance (in cm). This can be obtained as follow:

Speed = 3×10¹⁰ cm/s

Time = 1 s

Distance =?

$Speed = \frac{Distance}{Time}\\\\3*10^{10} = \frac{Distance}{1}$

Cross multiply

Distance = 3×10¹⁰ × 1

Distance = 3×10¹⁰ cm

Therefore, light travels a distance of 3×10¹⁰ cm in 1 second.

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answered: liannaswitzer

The answer to your question is below

Explanation:

Data

light speed = 300 000 km/s

a) Express it in scientific notation

to do it, we just move the decimal point 5 places to the left

300 000 = 3.0 x 10 ⁵ km/s

b) Convert this value to meters per hour

(300 000 km/s)(1000 m/1 km)(3600 s/1 h) = 300000x1000x3600 / 1x1x1

= 1.08 x 10¹² m/h

c) What distance in centimeters does light travel in 1 s?

data

v = 300 000 km/s

d = ?

t = 1 s

formula v = d/t we clear distance d = vxt

d = 300000 x 1 = 300000 km

d = 300000000 m = 30000000000 cm

answered: Guest

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

answered: Guest

The objects do not reach terminal velocity there is not enough time from the time the object falls from when it hits the ground to achieve terminal velocity. an object must be placed higher to achieve terminal velocity in order to be in free fall.

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