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3 years ago

Billy ran 800m in 240s. What is his speed? Round to two decimal places Your answer

Physics

2 answers:

Serjik [45]3 years ago

8 0

Answer:

Speed=3.33m/s

Explanation:

$Distance(d)=800m\\Time(t)=240sec\\Now,\\Speed=\frac{Distance}{Time} \\\\Speed=\frac{800}{240} \\\\Speed=3.33m/s$

Ilia_Sergeevich [38]3 years ago

4 0

Answer:

Speed = 3.33 m/s

Explanation:

Formula:

Speed = distance / time

Here distance is 800 metres and time is 240 seconds

Using the formula:

Speed = 800 / 240

Speed = 3.33 m/s

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3 years ago

A 0.200 kg block on a vertical spring with spring constant of 4.65 ✕ 103 N/m is pushed downward, compressing the spring 0.084 m.

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Answer:

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3 years ago

What maximum force do you need to exert on a relaxed spring with a 1.2×104-n/m spring constant to stretch it 6.0 cm from its equ

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Answer:

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$F=kx=1.2\times 10^4\times 0.06=720N$

So the maximum force which is necessary to relaxed the spring will be eqaul to 720 N

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4 years ago

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3 years ago

A window in a house has a rectangular shape of 2.0 m by 1.0 m. The glass in the window is 0.5 cm thick, with a thermal conductiv

KonstantinChe [14]

Answer:

P = 5280 W

Explanation:

The conductivity of the materials determines that heat flows from the hot part to the cold part, the equation for thermal conductivity transfer is

P = Q / t = k A ( $T_{h}$ - $T_{c}$ ) / L

Where k is the thermal conductivity of the glass 0.8 W / ºC, A the area of the window, T the temperature and L is glass thickness

Let's calculate the window area

A = l * a

A = 2.0 1.0

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Let's replace

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3 years ago