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VMariaS [17]
3 years ago
10

What are the units of measurement in the international system of units?

Physics
1 answer:
emmainna [20.7K]3 years ago
7 0

Ampere
Candela
Second
Metre (Meter)
Kilogram
Kelvin
and (added in 1971 was) Mole

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A tennis ball (m=0.060 kg) is moving horizontally at 20 m/s toward a tennis player who hits it straight back at 26 m/s. What is
Rus_ich [418]

Answer:

0.36 kg-m/s

Explanation:

Given that,

Mass of a ball, m = 0.06 kg

Initial velocity of the ball, u = 20 m/s

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We need to find the change in momentum of the tennis ball. It is equal to the final momentum minus initial momentum

\Delta p=m(v-u)\\\\=0.06\times (26-20)\\\\=0.36\ kg-m/s

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4 0
2 years ago
1. Why did Asteroid 2019 OK cause concern among scientists? * The asteroid was not detected until it was extremely close to Eart
AveGali [126]

Answer:

<u>The asteroid was not detected until it was extremely close to Earth. </u>

Explanation:

According to data from NASA, the Asteroid named 'Astriod 2019 OK', was detected when it was extremely close to earth with just about an estimated distance of  73,000 kilometers  (45,000 miles) from the Earth.

Scientists were concerned at the proximity of this space object to the Earth before it was discovered, and it brought about a cause of concern that since it was not extremely large (estimated 57 to 130 meters wide) it creates a potential for other smaller asteroids to escape detection and struck the earth.

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2 years ago
1. A kangaroo hops 84 m to the east in 7 seconds.
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Explanation:

Given parameters:

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Time  = 7s

Unknown:

Speed of kangaroo  = ?

Velocity of kangaroo  = ?

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To solve this problem,

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  Velocity  = \frac{displacement}{time}   = \frac{84}{7}   = 12m/s due east

3 0
3 years ago
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