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Ronch [10]
2 years ago
9

True or false: In order to create a sound wave, work must be done.

Physics
1 answer:
il63 [147K]2 years ago
4 0

True - Because a sound wave carries energy; to propagate energy, energy must be applied for the sound wave to carry energy.

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21. True or false: During heat transfer heat always travels from the warmer object to the cooler object.
guajiro [1.7K]
Answer: True

When 2 things are at different temperatures and they touch eachother, the heat flows from the warmer object to the cooler one.


4 0
3 years ago
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b) accelerate to the left as much more pressure is pulling it in that direction and on the right however , there is less force .

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3 years ago
What do you understand by family health?<br>​
AleksandrR [38]

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Family health provides, besides the cure of disease, various activities and programs in prevention, rehabilitation, and health promotion for all members of families/households. pls mark me branilest

3 0
3 years ago
Read 2 more answers
Two point charge
timama [110]

Answer:

Showing results for Two point charge q, separated by 1.5cm have change value of +2.0 and -4.0AND/C respectively what is the magnitude of the Electric force midway between them?

Search instead for Two point charge q, seperated by 1.5cm have change value of +2.0 and -4.0N/C respectively what is the magnitude of the Electric force midway between them?

4 0
2 years ago
Kalea throws a baseball directly upward at time t = 0 at an initial speed of 13.7 m/s. How high h does the ball rise above its r
Trava [24]

Answer:

h = 9.57 seconds

Explanation:

It is given that,

Initial speed of Kalea, u = 13.7 m/s

At maximum height, v = 0

Let t is the time taken by the ball to reach its maximum point. It cane be calculated as :

v=u-gt

u=gt

t=\dfrac{u}{g}

t=\dfrac{13.7}{9.8}

t = 1.39 s

Let h is the height reached by the ball above its release point. It can be calculated using second equation of motion as :

h=ut+\dfrac{1}{2}at^2

Here, a = -g

h=ut-\dfrac{1}{2}gt^2

h=13.7\times 1.39-\dfrac{1}{2}\times 9.8\times (1.39)^2

h = 9.57 meters

So, the height attained by the ball above its release point is 9.57 meters. Hence, this is the required solution.

7 0
3 years ago
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