3 years ago

Explain why friction makes it harder to push a box filled with groceries than an empty box

1 answer:

5 0

It is harder to push a box with groceries in it because the mass is weighing the box down. Which makes it harder to push

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if a piece of sea floor has moved 50 km in 5 million years what is the yearly rate of sea-floor motion?

BartSMP [9]

<span>0.0001 km / year or 10^-5 km/year just take 50 km and divide it by 5 million</span>

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Lady_Fox [76]

The best answer is letter (A) a double pulley system. Atwood Machine is normally used as a measurement in balancing to object to verify the mechanical law of motion with constant acceleration.

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3 years ago

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nalin [4]

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3 years ago

PLEASE HELP ME WITH THIS ONE QUESTION

Vlad [161]

Answer: $7.95^{\circ}C$

Explanation:

Given

Mass of water is $m_1=1\ kg$

mass of ice is $m_2=0.1\ kg$

Latent heat of fusion $L=3.33\times 10^5\ kJ/kg$

The heat capacity of water is $c_{w}=4186\ J/kg^{\circ}C$

Suppose water is at $T^{\circ} C$ and it reaches to $0^{\circ}C$ to melt the ice

the heat released by water must be equivalent to heat absorbed by the ice

$\therefore \quad m_1c_w(T-0)=m_2\times L\\\Rightarrow 1\times 4186\times T=0.1\times 3.33\times 10^5\\\Rightarrow T=7.95^{\circ}C$

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Zigmanuir [339]

C should be right ok

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