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3 years ago

What conversion factor is needed to change from kilometers to meters?

Physics

1 answer:

ELEN [110]3 years ago

5 0

The conversion factor needed to change from kilometers to meters is

D) 1000

Explanation:

The meter (m) is the SI units to measure distance.

The kilometer (km) is a sub-unit, where the prefix 'kilo' stands for $10^3$ , or 1000. This means that:

$1 km = 1000 m$

Therefore, if we have a length expressed in kilometers, we just need to multiply by 1000 to get the corresponding length in meters.

For instance, if we have a length of

L = 3.47 km

To convert in meters, we do:

$L = 3.47 km \cdot (1000 \frac{m}{km})=3470 m$

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A 1232 kg car moving north at 25.6 m/s collides with a 2028 kg car moving north at 17.5 m/s . They stick together. In what direc

Citrus2011 [14]

Answer:

I. Angle = 41.7° Northeast.

II. Vr = 7.08m/s

Explanation:

Let the two cars be denoted by A and B

Given the following data;

Mass of car A = 1232 Kg

Velocity of car A = 25.6 m/s

Mass of car B = 2028 Kg

Velocity of car B = 17.5m/s

First of all, we would solve for momentum;

Momentum = mass × velocity

Momentum, M1 = 1232 × 25.6

Momentum, M1 = 31539.2 Kgm/s

Momentum, M2 = 2028 × 17.5

Momentum, M2 = 35490 Kgm/s

Now, let's find the resultant momentum using the Pythagoras theorem;

R² = M1² + M2²

R² = 31539.2² + 35490²

R² = 994721136.6 + 1259540100

R² = 2254261237

Taking the square root of both sides, we have

Resultant momentum, R = 47479.06 Kgm/s

To find the direction;

Angle = tan¯¹(M1/M2)

Angle = tan¯¹(31539.2/35490)

Angle = tan¯¹(0.89)

Angle = 41.7° Northeast.

To find the speed;

R = (M1 + M2)Vr

47479.06 = (31539.2 + 35490)Vr

47479.06 = 67029.2Vr

Vr = 47479.06/67029.2

Vr = 7.08m/s

6 0

3 years ago

(1) Assume that the lights in your kitchen use 300 watts. How much energy (in kWh) does it use and how much does it cost to leav

lbvjy [14]

Answer:

the cost to leave the lights on 24 hours a day for one year is 31,536 cents or 315.36 dollars

Explanation:

Given that;

P = 300 watts = 300/1000 = 0.3

t = 24hrs a day

In a calendar year, we have 365 days

so;

E = 0.3 × 365 × 24

E = 2628 KWh

given that; 1 KWh = 12 cent

then 2628 KWh is x

x = 2628 × 12

x = 31,536 cents or 315.36 dollars

Therefore, the cost to leave the lights on 24 hours a day for one year is 31,536 cents or 315.36 dollars

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3 years ago

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White raven [17]

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What are the major features of the human eye and to what are they analogous in a camera?

adelina 88 [10]

Answer:

The human major features with the analogous of camera are mentioned.

Explanation:

There are the following major features of human eye which are analogue with the camera:

Camera will have shutters which controls light entering into it, human eye consists of Diaphragm which also functions same.

Both gives Real & inverted images.

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4 years ago

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expeople1 [14]

Answer:

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3 years ago