PHYSICS HIGH SCHOOL

What is the average speed in miles per hour of the car that traveled a total of 200 miles in 5.5 hours

Answers

Answer 1
Answer:

Answer:

Average speed of the car is 36.36 miles per hour

Explanation:

It is given that,

Total distance traveled by the car, d = 200 miles

Total time taken, t = 5.5 hours

In this case, we have to find the average speed of the car. Average speed of the car is defined as the total distance divided by total time taken. Mathematically, it can be written as :

s=(d)/(t)

s=(200\ miles)/(5.5\ hours)    

s = 36.36 miles per hour

Hence, the average speed of the car is 36.36 miles per hour.                                 

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A rectangular plate has a length of (22.4 ± 0.2) cm and a width of (8.4 ± 0.1) cm. Calculate the area of the plate, including its uncertainty.

Answers

Area of the rectangle = Length  x  Width
We will calculate the percentage of uncertainties. 
For a length: p 1 = ( 0.2 · 100 ) : 22.4 = 20 : 22.4 = 0.893
For a width: p 2 =  ( 0.1  · 100 ) : 8.4 = 10 : 8.4 = 1.190
p 1 + p 2 = 0.893 + 1.190 = 2.083 %
A = 22.4 · 8.4 = 188.16 +/-  2.083 %
 Uncertainty: 188.16 · 0.02083  = 3.92 
A = 188.16 +/- 3.92 cm²     

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:

Explain why a clothes iron with a metal base must be connected to the mains by a three-core cable.

Answers

The earth connection is because the earth connection(third cable) helps to prevent the casing from turning into a live wire.

What are the three cables?

It is normal to find that the cable that is used in the pressing iron has three wires that connect to live, neutral and earth. The earth connection is very important in the pressing iron.

The reason why we ought to have the earth connection is because the earth connection helps to prevent the casing from turning into a live wire.

Learn more about pressing iron:brainly.com/question/9664475?

#SPJ9
The charge going to the clothes iron needs to be grounded so the iron does not make any shock

Light of wavelength 550 nm falls on a slit that is 3.50 x 10^-3 mm wide. How far from the central . maximum will the first diffraction maximum fringe be if the screen is 10.0 m away?

Answers

λ= 550 * 10^(-9)\] m. D = 3.50*10^-6 m.
d = 10 m. m = 1 2x = ?

Then you need to find x when n=1
or 
sinθ=λ/w=524x10^-9/0.0033=1.59x10^-4
≈θ for θ<<1 , so θ=1.59x10^-4 radians

Then you can find rhe distance of bright fringe from the center:d= θD=1.59x10^-4x10m ≈ 1.6 mm

The conversion of carbon dioxide to oxygen by plants is called _____. A. polysynthesis B. photosynthesis C. amino-acid synthesis D. amino-acid production

Answers

The conversion of carbon dioxide to oxygen by plants is called photosynthesis.
The answer would be B, photosynthesis. 
Using the process of elimination, the answer is easy to find.

Polysynthesis - The act or process of combining many separate elements into a whole (Free Dictionary)

Amino-acid Synthesis - No definition, but this is clearly not the answer as amino acid has nothing to do with carbon dioxide or oxygen.

Amino-acid Production - This doesn't work for the same reason as the last one. Amino acid is irrelevant.

Therefore, the answer is photosynthesis.

A device that conveys information with analog signals and digital signals is called _____.a) an electron device

b) an electrical device

c) an electric device

d) an electronic device

Answers

I believe the correct answer from the choices listed above is option D. A device that conveys information with analog signals and digital signals is called an electronic device. They are components for controlling the flow of electrical currents for the purpose of information processing and system control.
the correct answer is D
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