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4 years ago

A sound wave has a frequency of 192Hz and travels the length of a football field, 91.4m in 0.267s. What is the period?

Physics

1 answer:

Vinvika [58]4 years ago

6 0

Answer:1/192 seconds

Explanation:

Period=1÷frequency

Period=1÷192

Period=1/192 seconds

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For 1983 through 1989, the per capita consumption

Tresset [83]

Answer:

y = 43.55 + 2.15t

Explanation:

We were told that in 1983, the per capita consumption was 37.1 pounds, and in 1989 it was 50 pounds.

If we assume t = 0 corresponds to year 1980. Then, for 1983 it will be t = 3 and for 1989,it will be t = 9.

Thus, expressing the information as ordered pairs, we have; (3,37. 1) and (9,50).

Let us now find slope of the linear function:

m1 = (y2 - y1)/(t2 - t1)

m1 = (50 - 37.1)/(9 - 3)

m1 = 2.15

So, we can find the linear equation as;

y - 37.1 = 2.15(t - 3)

y = 37.1 + 2.15t - 6.45

y = 43.55 + 2.15t

8 0

3 years ago

Please help with these i dont know how to do them

Svetradugi [14.3K]

20.0M/S. IS THE HORIZONTAL VELOCITY OF THE BALL JUST BEFORE IT REACHES THE GROUND

12.2 SECONDS IS THE APPROXIMATE TOTAL TIME REQUIRED FOR THE BALL

3 0

4 years ago

The distance vs. time graph of a car moving at constant speed should be a straight line. Why do the data points in the graph plo

iragen [17]

Answer:

The measurements are inexact

Explanation:

6 0

3 years ago

Nicholas spends 20 minutes ironing shirts with his 1,800-watt iron. How many joules of energy were used

ivanzaharov [21]

Multiply the power (1,800 watts) by time (1,200 seconds) to get 2,160,000 joules (or 2.16 MJ)

7 0

3 years ago

Which of the following involves an endothermic reaction?

earnstyle [38]

Answer:

C. Plants converting sunlight into chemical energy.

Explanation:

An "endothermic reaction" is a process whereby energy coming from the surroundings is being absorbed as heat. This activates the reaction to occur. Since it absorbs the heat to start the reaction, then it can be classified as an endothermic reaction.

When plants convert sunlight into chemical energy, it absorbs the sunlight as a light energy on its chlorophyll. This is where photosynthesis occur. This then results to the chlorophyll reacting with the carbon dioxide, water and the energy which results to the production of oxygen and glucose.

So, this explains the answer.

7 0

3 years ago