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3 years ago

What are two reasons a common measuring system is important?

1 answer:

5 0

One reason Is when you have different countries lets say the U.S.A and France you need t have a common unit for the importing and exporting of data the second is the people who look at the data if they are in a different country will not get confused as easily

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Two protons are 1 × 10−10 m apart (about one atomic radius). Which interaction between two protons is stronger, the gravitationa

anastassius [24]

Answer: The electric repulsion between the two protons is stronger than the gravitational attraction.

Explanation: Please see the attachments below

4 0

4 years ago

An Olympic runner competing in a long-distance event finishes with a time of 2 hours , 15 minutes , and 23 seconds . The event h

Talja [164]

Answer:

The average speed of the runner is 18.2 km/h.

Explanation:

Hi there!

The average speed is calculated as the traveled distance over time:

speed = traveled distance / elapsed time to cover that distance

We have to find the speed in km/h, so let´s start converting the time into hours:

23 s · (1 min/60 s) = 0.38 min

15.38 min · (1 h / 60 min) = 0.26 h

Total time: 0.26 h + 2 h = 2.26 h

The distance traveled in km is:

25.5 mi · (1.61 km/ 1 mi) = 41.1 km

Then, the average speed will be:

speed = 41.1 km / 2.26 h = 18.2 km/h

The average speed of the runner is 18.2 km/h.

6 0

3 years ago

Manu took a pebble and a sheet of paper both weigh one gram. His friend told that if we drop both at the same time, the pebble w

Nata [24]

Answer: friction has no role to play in this case. because friction usually occurs between to parts which come in contacts. examples (a)our joints in the human body (b)two mechanical parts (shafts).

Explanation:

However what this topic relates to is gravity. The pebble and paper both weigh one gram, but have different density this is the sole reason why if both are drop from same height the pebble would reach the ground faster than the paper because it is more denser. unlike the paper with a lesser density which would take a longer time to reach the ground.

3 0

3 years ago

Canada geese migrate essentially along a north–south direction for well over a thousand kilo-meters in some cases, traveling at

kotykmax [81]

Answer:

a) 66.4 relative to the west in the south-west direction

b) 5.455 hours

Explanation:

a)If the wind is blowing east-ward at a speed of 40km/h, then the west component of the geese velocity must be 40km/h in order to counter balance it. Geese should be flying south-west at an angle of

$cos(\alpha) = 40 / 100 = 0.4$

$\alpha = cos^{-1}(0.4) = 1.16 rad = 180\frac{1.16}{\pi} = 66.4^0$ relative to the West

b) The south-component of the geese velocity is

$100sin(\alpha) = 100sin(66.4^0) = 91.65 km/h$

The time it would take for the geese to cover 500km at this rate is

t = 500 / 91.65 = 5.455 hours

7 0

3 years ago

Mars moves in an elliptical orbit around the sun, and the mass of mars is much less than the mass of the sun. at the instant sho

Bess [88]

I believe the answer would be that the system potential energy will increase; while the Mar's angular momentum will remain the same.
Mars rotates on its axis, completing one revolution every 24.6 hours. The axis of mars is tilted at 25 degrees and 12 minutes relative to its orbital plane about the Sun. This produces seasons on the surfaces of Mars, similar to the seasons on Earth.

4 0

3 years ago