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aleksandrvk [35]

4 years ago

7

A man walks 54.5 meters east, then another 30 meter east. Calculate his displacement relative to where he started.

1 answer:

Vedmedyk [2.9K]4 years ago

3 0

d= d1+d2

d= 54.5+30=84.5

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Investigations allow for the control of variables

Sloan [31]

I believe that the statement is true. <span>Investigations allow for the control of variables. Changing variables will lead you to observations that may prove your hypothesis. Hope this answers the question. Have a nice day. Please feel free to ask more questions.</span>

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The info below shows three kettles with their powers and the time they take to boil 500cm3 of water. If electricity costs 9p per

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The cost of boiling 500 cm³ of water using the 3 KW Kettle is 1.35p

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This is defined as the rate in which energy is consumed. Electrical power is expressed mathematically as:

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2 years ago

In what direction must a force be applied so that the forces on the 1 kg object are balanced

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A photon of red light (wavelength = 710 nm) and a ping-pong ball (mass = 2. 40 × 10^-3 kg) have the same momentum. At what speed

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The speed of the ball moving is

$v = 3.94 \times 10 {}^{ - 25}m/s$

what is momentum?

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since,the Photon and the ping-pong ball have the same momentum,we have

$pball = pphotons = \frac{6.626 \times 10 {}^{ - 34}kgm/s }{700 \times 10 {}^{ - 9} }$

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