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3 years ago

6

At a baseball game, Bill observes from the bleachers Jack throwing a ball toward home at 15 km/s while Kevin runs toward home fr

om third base at 7 km/s. What is the velocity of the ball from Bill's and Jack's perspectives?

1 answer:

sattari [20]3 years ago

7 0

Answer:bill 5 m/s. Jack:10 m/s

Explanation:

Cuz I took it

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A person pushes a 125 kg object initially at rest on a frictionless surface. The object ends up with a final velocity of 1.40 m/

mr Goodwill [35]

Answer:

a person pushes a 125 kg

Explanation:

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3 years ago

You are asked to design a cylindrical steel rod 50.0 cm long, with a circular cross section, that will conduct 170.0 J/s from a

zepelin [54]

Answer:

You are asked to design a cylindrical steel rod 50.0 cm long, with a circular cross section, that will conduct 170.0 J/s from a furnace at 350.0 ∘C to a container of boiling water under 1 atmosphere.

Explanation:

Given Values:

L = 50 cm = 0.5 m

H = 170 j/s

To find the diameter of the rod, we have to find the area of the rod using the following formula.

Here Tc = 100.0° C

k = 50.2

H = k × A × $\frac{[T_{H -}T_{C} ] }{L}$

Solving for A

A = $\frac{H * L }{k * [ T_{H}- T_{C} ] }$

A = $\frac{170 * 0.5}{50.2 * [ 350 - 100 ]}$

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A = $\frac{\pi }{4}$ d²

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d = 9.28 cm

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4 years ago

Can someone help me?

Setler [38]

Answer: (1, 30), (2,10), (3,40), (4,20)

Explanation:

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3 years ago

Work-Energy Theorem: A 4.0 kg object is moving with speed 2.0 m/s. A 1.0 kg object is moving with speed 4.0 m/s. Both objects en

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The same braking force does work on these objects to slow them down. The work done is equal to their change in kinetic energy:

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The two objects travel the same distance before stopping.

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3 years ago

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The answer is calcium. I just did it and it was correct

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3 years ago

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