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3 years ago

Two coffee cups one at 80 degrees c another at 60 degrees c are put into a large cup what is the final temperature of the coffee

1 answer:

8 0

If you're trying to sum it up, it would be 140 degrees c*, otherwise it would probably be 80 degrees c since its more hotter than 60 degrees

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A certain radar installation tracks airplanes by transmitting electromagnetic radiation of wavelength 4.0 cm.

Anna35 [415]

the wavelength equation is

speed (of light in this case)= wavelength (m) x frequency

3x10^8m/s / .07m = f

frequency= 4 285 714 286 hertz

b) Total distance= 4.8 km (4,800 m)

Speed = 3x10^8 m/s

d=st

t= d/s

t= 4,800 m/3x10^8m/s

<span>t= 1x10^-5 seconds</span>

3 0

3 years ago

Read 2 more answers

What's the melting point of aluminum

PSYCHO15rus [73]

660.3 degrees centigrade/celsius

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3 years ago

A bicycle racer is going downhill at 10.4 m/s when, to his horror, one of his 2.34 kg wheels comes off when he is 68.0 m above t

yuradex [85]

Answer:

$v_1 = 27.83 m/s$

Explanation:

Given data:

downhill velocity = 10.4 m/s

weight of wheel is 2.34 kg

distance from foot of hill is 68 m

cylinder diameter is 85 cm

from conservation of energy principle we have following relation

$mgh + \frac{1}{2} mv^2 +\frac{1}{2} I_{cm} \omega^2 = mgh + \frac{1}{2} mv_1^2 +\frac{1}{2} I_{cm} \omega^2$

we know that moment of inertia $I_{cm} = mR^2$

$= 2.34\times (\frac{0.85}{2})$

= 0.99 m^4

$\omega = \frac{v}{R}$

SO WE HAVE

$mgh + \frac{1}{2} mv^2 +\frac{1}{2} I_{cm} \frac{v}{R}^2 = mgh + \frac{1}{2} mv_1^2 +\frac{1}{2} I_{cm} \frac{v_1}{R}$

$mgh + mv^2 = mv_1^2[tex]v_1^2 = v^2 + gh$

$= 10.4^2 + 9.8\times 68$

$v_1 = 27.83 m/s$

4 0

3 years ago

What does the term "electoral process" refer to?

german

•The method by which a person is elected to Public office or

•The taking and counting of votes

The US Constitution specifies the right to hold elections. The method and place of conducting elections are left to the states to decide, but the Congress has the power to alter their regulations. The Constitution specifies that election to House of Representatives shall be direct or popular. The election of the President, Vice President and Senate shall be indirect. The President and Vice President are chosen by electors selected by the people. The Senators are chosen by the popular election.

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3 years ago

The distance traveled by an automobile moving at a constant velocity is

Verizon [17]

Equals variation in position over variation in time, here’s the formula hope it helps :)

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3 years ago