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8 months ago

If a train travels 500 kilometers from Stockholm to

Physics

1 answer:

o-na [289]8 months ago

4 0

Hello,

Average speed is total distance divided by total time. From the problem, our total distance is given as 500 kilometers and given time is 5 hours. Therefore, the average speed is:

$\displaystyle{v_\text{average}=\sum_{i=1}^n \dfrac{s_i}{t_i}}\\\\\displaystyle{v=\dfrac{500\ \text{km}}{5 \ \text{h}}}\\\\\displaystyle{v=100 \ \text{km/h}}$

Therefore, the average speed is 100 km/h. Please let me know if you have any questions!

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Answer:

The speed of the wire is 5 m/s.

Explanation:

Given that,

Length = 20 cm

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Current = 10 mA

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Put the value of $\epsilon$ into the formula of current

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$v=\dfrac{IR}{Bl}$

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3 years ago

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3 years ago

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Rashid [163]

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2 years ago

Wave traveling at 330 m/sec has a wavelength of 4.3 meters. What is the frequency of this wave?

Rasek [7]

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Explanation:

Given:

Wave velocity ( v ) = 330 m / sec

wavelength ( λ ) = 4.3 m

We have to calculate Frequency ( f ):

We know:

v = λ / t [ f = 1 / t ]

v = λ f

= > f = v / λ

Putting values here we get:

= > f = 330 / 4.3 Hz

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2 years ago

When a golf club hits a 0.0459 kg ball at rest, it exerts a 2380 N force for 0.00100 s. What is the speed of the ball afterwards

aksik [14]

Answer:

51.85m/s

Explanation:

Given parameters:

Mass of ball = 0.0459kg

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Unknown:

Speed of the ball afterwards = ?

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To solve this problem, we use Newton's second law of motion:

F = m x $\frac{v - u}{t}$

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m is the mass

v is the final velocity

u is the initial velocity

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8 0

3 years ago

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