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insens350 [35]
3 years ago
9

what%20%5C%3A%20is%20%5C%3A%20energy%7D%20%5C%5C%20%20%5C%5C%20%5Chuge%5Cmathfrak%5Cpink%7Basap%20%5C%3A%20please%20%5C%3A%20%7D" id="TexFormula1" title="\huge\mathfrak\purple{hello...} \\ \\ \huge\mathfrak\green{what \: is \: energy} \\ \\ \huge\mathfrak\pink{asap \: please \: }" alt="\huge\mathfrak\purple{hello...} \\ \\ \huge\mathfrak\green{what \: is \: energy} \\ \\ \huge\mathfrak\pink{asap \: please \: }" align="absmiddle" class="latex-formula">
​
Physics
1 answer:
andre [41]3 years ago
6 0

Energy is "the ability to do work". Energy is how things change and move. It takes energy to cook food, to drive to school, and to jump in the air. Different forms of Energy. Energy can take a number of different forms.

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If an object has no acceleration, can you conclude that no forces are exerted on it
MrMuchimi

No. It has no acceleration, which just means that the forces acting on it are equal and opposite, not that there are no forces exerted on it.

But if you're talking about the resulting Net Force, then yes you can conclude there is no Net Force acting on an object with no acceleration.

3 0
3 years ago
A seismic wave is detected 100m, 5s after and explosion. Calculate the wave speed
sertanlavr [38]

we know that,

Frequency = 1/ time period

hence, Feq = 1/5 ===> 0.2 Hz

hence, wave velocity = freq * wavelength

hence,

V = 0.2 * 100

==> Wave velocity = 20 m/s

8 0
3 years ago
In Europe the standard voltage in homes is 220 V instead of the 120 V used in the United States. Therefore "100-W" European bulb
Maslowich

Explanation:

In Europe the standard voltage in homes is 220 V instead of the 120 V used in the United States.

100-W European bulb would be intended for use with a 220-V potential difference.

(a) If V = 220 V and P = 100 W

Power :

P=\dfrac{V^2}{R}\\\\R=\dfrac{V^2}{P}\\\\R=\dfrac{(220)^2}{100}\\\\R=484\ \Omega

If you bring a "100-W" European bulb home to the untied States, what should be its US power rating. So,

P=\dfrac{V^2}{R}\\\\P=\dfrac{(120)^2}{484}\\\\P=29.75\ W

or

P = 29.8 watts

(b) Let I is the current will the 100-W European bulb draw in normal use in the United States. So,

I=\dfrac{V}{R}\\\\I=\dfrac{120}{484}\\\\I=0.248\ A

Hence, this is the required solution.

3 0
3 years ago
Read 2 more answers
A ufo was detected on the radar flying 7400 miles in 3 min, what is the estimated speed per hour?
Ghella [55]
S=7400mi
t=3 min= 0.05h
v=7400mi/0.05h
v=148000mph
8 0
4 years ago
Why there is an atmosphere around earth while many planets dont have<br><br><br> PLZ ANSWER
Anna [14]

Answer:

Explanation:

In short, our atmosphere is here because of gravity. When Earth formed, about 4.5 billion years ago, the molten planet barely had an atmosphere. But as the world cooled, its atmosphere formed, largely from gases spewed out of volcanoes, according to the Smithsonian Environmental Research Center (SERC). This ancient atmosphere was very different from today's; it had hydrogen sulfide, methane and 10 to 200 times as much carbon dioxide as the modern atmosphere does, according to SERC. [Infographic: Earth's Atmosphere Top to Bottom]

7 0
3 years ago
Read 2 more answers
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