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____ [38]
2 years ago
7

A bus starts from village A at 7:00 am and reaches village B at 8:30 am. If the distance between the villages A and B is 60 km.

Find the average speed of the bus​
Physics
2 answers:
aev [14]2 years ago
6 0

Answer:

The answer is 40 km/h

Explanation:

<h3><u>Given</u>;</h3>
  • distance (s) covered by the bus = 60 km
<h3><u>To</u><u> Find</u>;</h3>
  • The average speed of the bus
<h3><u>Formula</u>;</h3>
  • Average velocity (v) = Distance ÷ Time

Now,

Time (t) taken = 8:30 am – 7:00 am = 1 ½ hour = 3/2 hour

Here,

v = s/t

v = 60 ÷ 3/2

v = 60 × 2 ÷ 3

v = 20 × 2

v = 40 km/h

Thus, The average speed of the bus is 40 km per hour

 

<u>-TheUnknownScientist 72</u>

SVEN [57.7K]2 years ago
5 0

1.1111111111

Explanation:

v=s/t

t=8:30-7:00=1:30

convert to second=5400second

s=60km covert to meter=6000

6000/5400=1.11111111

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anastassius [24]

Answer:

\lambda_x=5.019858nm

Explanation:

From the question we are told that

Speed of star S=8.46km/s

Distance of spectral line \lambda_0= 5.02nm

Generally the equation for wavelength with respect to spectral lines is mathematically given by

\lambda=\lambda _0 *\frac{v}{c}

where

\lambda_0= length\ of\ spectral\ line

c=The\ speed\ of\ light

v= speed\ of\ moving\ object

therefore

\lambda=5.02*10^{-9} *\frac{8.46*10^{12}}{299 792 458*10^9}

\lambda=1.42*10^{-4} nm

Generally the equation for new wavelength is mathematically given as

\lambda_x=\lambda _0-\lambda

\lambda_x=5.02 nm-1.42*10^{-4} nm

\lambda_x=5.02-1.42*10^{-4}

Therefore

\lambda_x=5.019858nm

5 0
3 years ago
in positive numbers less than 1, the zeros between the decimal point and non zero are _____ significant ​
Margaret [11]
Zeros the left of the decimal but still less than one are non significant but to the right they are.
For example: 0.003 (only 3 is significant) but for 0.030 (two are significant)
8 0
3 years ago
A metal block has a density of 5000 kg per cubic meter and a mass of 15,000 kg. What is its volume?
Naily [24]

Taking into account the definition of density, the volume of the metal block is 3 m³.

<h3>What is density</h3>

Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density=\frac{mass}{volume}

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

<h3>Volume of the metal block</h3>

In this case, you know that:

  • Density= 5000 \frac{kg}{m^{3} }
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  • Volume= ?

Replacing in the definition of density:

5000 \frac{kg}{m^{3} } =\frac{15000 kg}{volume}

Solving:

volume×5000 \frac{kg}{m^{3} }= 15000 kg

volume= \frac{15000 kg}{5000 \frac{kg}{m^{3} }}

<u><em>volume= 3 m³</em></u>

In summary, the volume of the metal block is 3 m³.

Learn more about density:

brainly.com/question/952755

brainly.com/question/1462554

#SPJ12

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