3 years ago

How do i round decimals in physics.

1 answer:

3 0

If adding/ subtracting) the least amount of decimals in the numbers you used
if multiplying/ dividing) the least amount sig figs in the numbers you used

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A 3.6-volt battery is used to operate a cell phone

Marina CMI [18]

Explanation :

It is given that,

Potential energy, $V=3.6\ V$

Power dissipated, $P=0.064\ Watt$

We know that the power dissipated is given by :

$P=VI$

I is the current passing through the phone.

$I=\dfrac{P}{V}$

$I=\dfrac{0.064\ W}{3.6\ V}$

$I=0.017\ A$

I = 0.018 A

Hence, the current that passes through the phone is (1) 0.018 A.

3 0

3 years ago

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A tomato of mass 0.18 kg is dropped from a tall bridge. If the tomato has a speed of 11 m/s just before it hits the ground, what

kondor19780726 [428]

The kinetic energy of the tomato is :

K.E = 1/2 mv^2

K.E = 1/2 x 0.18 kg x 11 m/S^2

K.E = 0.99

Hope this helps

7 0

3 years ago

Cole drives to school from home, starting from rest and accelerating for 10 minutes as he travels 6.0 km to school.

Firlakuza [10]

Explanation:

this is the answer for your question. if you have any doubt.

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2 years ago

Pause

nirvana33 [79]

Answer:

Explanation:

a=f/m

10Kgm/s2/4kg

2.5m/s2

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2 years ago

An arrow is shot straight up in the air at an initial speed of 15 m/s. After how much time is the arrow heading downward at a sp

Greeley [361]

Answer:

2.35 seconds

Explanation:

Remark

This is a question where direction matters. Let us call down + and up minus. It won't matter. The answer will be the same.

Formula

a = (vf - vi)/t

Givens

a = 9.8 m/s^2

vi = - 15 m/s

vf = 8m/s

Solution

9.8 = (8 - - 15)/t Multiply both sides by t

t * 9.8 = 23 Divide by 9.8

t = 23/9.8

t = 2.35 s

7 0

3 years ago