PHYSICS HIGH SCHOOL

In 2009, a Jamaican sprinter Usain Bolt created a world record in Berlin by running 100 m in just 9.58 seconds. What is his average speed?​

Answers

Answer 1
Answer: To find Usain Bolt's average speed, you can use the formula for average speed:

Average Speed = Distance / Time

In this case, the distance is 100 meters, and the time is 9.58 seconds. Plug these values into the formula:

Average Speed = 100 meters / 9.58 seconds

Now, calculate the average speed:

Average Speed ≈ 10.44 meters per second

So, Usain Bolt's average speed during his world-record 100-meter sprint was approximately 10.44 meters per second.

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The position of an object moving along a line at any time t 2 0 is given by the function s(t) = t3 – 9t2 + 18, where s is measured in feet and t is measured in seconds. A) Find the velocity of the particle at t = 4.

Answers

Answer:

S = t^3 - 9 t^2 + 18          position of particle

V = dS / dt = 3 t^2 - 18 t     speed of particle at time t

V = 3 * 4^2 - 18 * 4 = 48 - 72 = - 24 ft/sec

 

What kind of energy does a rubber band have when it is stretched? A.
elastic potential energy

B.
gravitational potential energy

C.
kinetic energy

D.
chemical energy

Answers

the answer is obviously a because a rubber band uses elastic energy

Answer:

The answer is A.

Explanation:

It's correct in Аpex

White light is shining on a green grape. The grape _____.absorbs green light
reflects green light
reflects all colors of light except green
transmits green light

Answers

The grape absorbs all colors except green, and green light is the
only light that remains to bounce around and enter people's eyes. 

This is a big part of the reason why, whenever somebody looks at
the grape, they remark "Oh look !  The grape is green !"

Answer:

reflects green light.

Explanation:

Objects that have value in themselves and that are also used as money is the definition for _____.a. commodity money
b. representative money
c. fiat money
d. money

Answers

Answer: The correct answer for the blank is- a. commodity money.


Commodity money can be described as a form of currency, which has an intrinsic value ( that is value of its own) as well as value (in the form of money) in their use.

For Example- gold, silver, grains serve as commodity money.

   Objects that have value in themselves and that are also used as money is the definition for  commodity money. Hope this helped :)

How do French bull dogs get ear infections?

Answers

in all dogs, not just Frenchie’s, because of the way their ears are designed. The horizontal and vertical components of a dog’s ear make it difficult for particles of dirt and water to escape . btw hi

What is your rate in miles/hour if you tun at a speed of 2.2 miles in 20 minutes

Answers

you need to convert minutes to hours so 
(2.2 mi)/(20 min) x (60 min)/(1 hr) = (6.6 mi)/(1 hr)
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