2 years ago

Which of these is an example of a chemical change?

1 answer:

5 0

A; A chemical change makes a substance that wasn't there before. Moldy cheese has a new substance, color change and an odor.

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A 1.120 kg car is traveling with a speed of 40 m/s. find its energy

Aleonysh [2.5K]

Answer:

896 kJ

Explanation:

KInetic Energy = 1/2 m v^2

= 1/2 (1120)(40^2) = 896 000 J or 896 kJ

4 0

1 year ago

G a person of mass 100 kg is riding an elevator which was initially moving up with a velocity of 3 m/s. over a distance of 4 m t

andriy [413]

E=mc² where c is speed of the light
3 m/s more andmore less than speed of the light. So mass of the person still 100 kg

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2 years ago

A charge of 1.5 µC is placed on the plates of a parallel plate capacitor. The change in voltage across the plates is 36 V. How m

belka [17]

Answer:

Energy stored in the capacitor is $U=2.7\times 10^{-5}\ J$

Explanation:

It is given that,

Charge, $q=1.5\ \mu C=1.5\times 10^{-6}\ C$

Potential difference, V = 36 V

We need to find the potential energy is stored in the capacitor. The stored potential energy is given by :

$U=\dfrac{1}{2}q\times V$

$U=\dfrac{1}{2}\times 1.5\times 10^{-6}\times 36$

U = 0.000027 J

$U=2.7\times 10^{-5}\ J$

So, the potential energy is stored in the capacitor is $U=2.7\times 10^{-5}\ J$ . Hence, this is the required solution.

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2 years ago

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Blank parasites can cause serious Illnesses like West Nile virus and Lyme diseases

Greeley [361]

Endo I think but look it up jus in case

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2 years ago

3. During a tug-of-war, Team A pulls with a

Neko [114]

Answer:

8000 - 5000 =3000

Explanation:

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