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3 years ago

HELP ASAP PLEASE Which of the following mechanical waves have the same energy?

Physics

2 answers:

serious [3.7K]3 years ago

6 0

Answer:

1 and 4 is the answer

UNO [17]3 years ago

6 0

Answer:

1 and 4

Explanation:

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The cost of buying shirts is partly constant and partly varies with the number of shirts bought. When the number of shirts is 5

Jet001 [13]

Answer:

The cost of the buying the shirts is #9680

Explanation:

let the cost of buying shirt = C

let the number of shirt bought = N

The following equation can be generated based on the statement above;

C = k + Nb

When the cost, C = #240, the number of shirt = 5

240 = k + 5b ------ equation (1)

where;

k and b are constants

When the cost, C = #400, the number of shirt = 10

400 = k + 10b ------ equation (2)

From equation (1), make k the subject of the formula;

k = 240 - 5b ---- equation (3)

Substitute in the value of k into equation (2)

400 = k + 10b

400 = (240 - 5b) + 10b

400 = 240 - 5b + 10b

400 - 240 = -5b + 10b

160 = 5b

b = 160 / 5

b = 32

From equation (3), calculate k

k = 240 - 5b

k = 240 -5(32)

k = 240 - 160

k = 80

When the number of shirts bought = 300, the cost of the buying the shirts =

C = k + Nb

C = 80 +32N

Where;

N is the number of shirts

C = 80 + 32(300)

C = 80 + 9600

C = #9680

Therefore, the cost of the buying the shirts is #9680

8 0

3 years ago

A cyclist rode at an average speed of 10 mph for 15 miles. how long what the ride?

nekit [7.7K]

15 miles * 1 hour = 15 mph
15 mph / 10 miles = 1.5 hours

5 0

3 years ago

Which sentence is a correct statement of Newton's second law?

erma4kov [3.2K]

Answer:

B. A object in motion stays in motion, and an object at rest stays at rest unless acted upon by a net force.

4 0

3 years ago

Once a ball leaves a table at 10 m/s, how long will it take to hit the floor

Zarrin [17]

<u>Answer:</u>

The time taken for the ball to hit the floor as 1.02 seconds

<u>Explanation:</u>

As per the given question, the ball leaves at a speed from the table with an initial velocity of 10 m/s, we have the equation

$\mathrm{V}_{\mathrm{f}}=\mathrm{V}_{\mathrm{i}}+\mathrm{at}$

where Vf represents the final velocity

Vi represents the initial velocity

a represents the acceleration and

t represents the time

$\mathrm{V}_{\mathrm{f}}=\mathrm{V}_{\mathrm{i}}+\mathrm{at}$ after rearranging

$\mathrm{t}=\frac{\mathrm{vf}-\mathrm{vi}}{a}$

$\mathrm{t}=\frac{0-10}{9.8}$ = 1.022 seconds

6 0

4 years ago

Which statements are part of the safety protocol for this lab experiment? Check all that apply:

vagabundo [1.1K]

Answer:

Always wear a lab coat and safety goggles when performing an experiment

7 0

2 years ago