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Galina-37 [17]
3 years ago
15

A 4-kilogram ball moving at 8 m/sec to the right collides with a 1-kilogram ball at rest. After the collision, the 4-kilogram ba

ll moves at 4.8 m/sec to the right. What is the velocity of the 1-kilogram ball?​
Physics
1 answer:
Annette [7]3 years ago
4 0

Explanation:

momentum is a constant

4 \times 8 + 1 \times 0 = 4 \times 4.8 + 1 \times x

12.8 = 1 \times x

x = 12.8m {s}^{ - 1}

if u didnt quite get that...comment me

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Iron melts at 1535 degrees c. the inner core of the Earth is solid.Explain why this might have happened.
Karo-lina-s [1.5K]
Earth's inner core is solid even though the temperature is so high because the pressure is also very high.

Hope this helped:)
4 0
3 years ago
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The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the pla
Vladimir [108]

Answer

given,

Radius of sphere = 6.38 × 10⁶ m

time  = 1 day = 86400 s

\omega = \dfrac{2\pi}{T}

\omega = \dfrac{2\pi}{ 86400 }

\omega = 7.272 \times 10^{-5}\ rad/s

a) at equator

v = R_E \omega

v = 6.38 \times 10^6\times 7.272 \times 10^{-5}

v = 464 m/s

acceleration of the person

a = \omega^2R_E

a = (7.272 \times 10^{-5})^2(6.38 \times 10^6)

a = 0.03374 m/s^2

b) at a latitude of 61.0 ° north of the equator.

R = R_E cos \theta

R = 6.38 \times 10^6\times cos 61^0

R = 3.093 \times 10^6 m

v = R \omega

v = 3.093 \times 10^6 \times 7.272 \times 10^{-5}

v = 225 m/s

acceleration of the person

a = \omega^2R_E

a = (7.272 \times 10^{-5})^2(3.093 \times 10^6 )

a = 0.01635 m/s^2

4 0
3 years ago
Please help I’ll give brainliest
marta [7]

Answer:

Repel

Unlike

Atrract

Fur

Balloon

Positivley charged

negative

postive

neutral

Explanation:

It goes from top to bottom

7 0
3 years ago
I just want this information cuz it will come in handy in science soon. Where and how are Gamma rays found?
vodomira [7]

Gamma rays are found in extremely hot regions and they have the smallest wavelength but the most energy. They can be found by the effects they have on matter and it do few basic things with matter, it can collide with a electron and bounce of it as a billiard ball.

7 0
3 years ago
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If the child is gaining weight at an expected rate, a child who weighs 36 lb (16.3 kg) at 3 years of age would weigh what amount
algol [13]

The child at 5 years old would weight: 60 lb (27.16 kg) If he continues gaining weight a that rate

To solve this problem we will use a rule of three with the problem information:

3 years-------- 36 lb child's weight

5 years -------- x

Applying the rule of three we get:

x = ( 5 years * 36 lb child's weigh) / 3 years

x = 60 lb

By converting the weight units from lb to kg we have:

x = 60 lb * 16.3 kg/36 lb

x = 27.16 kg

<h3>What is rule of three?</h3>

It describes the proportionality of 3 known data and an unknown data. When you have more than 3 known facts that are involved in the proportionality, it is known as a compound rule. The rule of three is also known as a direct proportions.

Learn more about direct proportions at: brainly.com/question/1266676

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3 0
2 years ago
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