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shtirl [24]
3 years ago
6

A kite is 100m above the ground. If there are 200m of string out, what is the angle between the string and the horizontal? (Assu

me that the string is perfectly straight.)
Physics
1 answer:
belka [17]3 years ago
3 0

Answer:

the answer is 30°

Explanation:

due to:

sin law of sines

\frac{sin 90}{200} =\frac{sin\beta }{100}\\arcsin(100\frac{sin90}{200} )= 30°

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How much heat is needed to change the temperature of 3 grams of gold (c = 0.129 ) from 21°C to 363°C? The answer is expressed to
Temka [501]

Q= mcΔT

Where Q is heat or energy

M is mass, c is heat capacitance and t is temperature

You have to convert Celsius into kelvin in order to use this formula I believe

Celsius + 273 = Kelvin

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363 + 273 = 636K

Now...

Q= (0.003)(0.129)(636-294)

Q= 0.132 J if you are using kilograms, in terms of grams which seems more appropriate the answer would be 132J of energy.  

3 0
2 years ago
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3 years ago
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Answer:

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8 0
2 years ago
Which transformation could take place at the anode of an electrochemical cell?
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7 0
3 years ago
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