3 years ago

PLZ ANSWER ASAP IT IS A TEST AND IF YOU HELP ME I WILL GIVE YOU A $5 visa gift card.

Mathematics

1 answer:

Vitek1552 [10]3 years ago

5 0

Is this the whole equation?

Step-by-step explanation:

Cuz if not we need the whole question

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which has greater cenetic energy a car traveling 30.0 km/hr or one twice as heavy traveling at 15 km/hr?

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Answer:

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Step-by-step explanation:

From analysis the car traveling at 30 km/h has greater kinetic energy

we can deduce it from the expression of kinetic energy which is

$KE=\frac{1}{2} mv^2$

Assuming the mass m= 1 kg

For the 30 km/h

$KE=\frac{1}{2}*1*30^2 \\\\KE=\frac{1}{2}*1*900\\\\\KE=450 J$

For the 15 km/h

$KE=\frac{1}{2}*2*15^2 \\\\ KE=\frac{1}{2}*2*225 \\\\\ KE=\frac{1}{2}*450 J\\\\\ KE=225 J$

Though the kinetic energy is a function of mass and velocity, but from our analysis the faster moving object has more KE

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There are 12 football teams in a competition. The lions have a probability of 1/12 of winning the competition. How is this true?

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