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RUDIKE [14]
3 years ago
5

A racecar driver has to hold on tightly when going around a banked curve. Approximately what is the centripetal force on a 2220.

0 kg car going around a circle with a diameter of 190.0 meters at 25.0 m/s?
Physics
1 answer:
g100num [7]3 years ago
4 0

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A 5000 kg African elephant has a resting metabolic rate of 2500 W. On a hot day, the elephant's environment is likely to be near
alina1380 [7]

Answer:

36 kg

Explanation:

To answer this question, a few assumptions have to be made:

  • That the temperature on the day is 35 °C
  • That all the heat from the elephant is goes to warming/evaporating the water on the surface of the elephant

Energy released per hour = 2500 J/s * 3600 s = 9 000 000 J

Q = mcΔT

9 000 000 J= m *4.186 J/g-K * (373K - 308K) + m*2260 J/g

m =  36 000 g = 36 kg

3 0
3 years ago
An 800-kHz radio signal is detected at a point 2.7 km distant from a transmitter tower. The electric field amplitude of the sign
dimaraw [331]

Answer:

Option D is correct: 170 µW/m²

Explanation:

Given that,

Frequency f = 800kHz

Distance d = 2.7km = 2700m

Electric field Eo = 0.36V/m

Intensity of radio signal

The intensity of radial signal is given as

I = c•εo•Eo²/2

Where c is speed of light

c = 3×10^8m/s

εo = 8.85 × 10^-12 C²/Nm²

I = 3×10^8 × 8.85×10^-12 × 0.36²/2

I = 1.72 × 10^-4W/m²

I = 172 × 10^-6 W/m²

I = 172 µW/m²

Then, the intensity of the radio wave at that point is approximately 170 µW/m²

7 0
2 years ago
While a balloon is being filled, if the temperature of the air in the balloon decreases, what happens to its volume?
Ugo [173]
Why is it always balloons?
anyways so the balloon volume goes somewhere else when it shrinks because the balloon is losing air i think
4 0
3 years ago
Read 2 more answers
Renee looks out a window. The window is clear, or transparent. This means most of the light that hits the window is:
Mrrafil [7]
My answer d absorbed
5 0
2 years ago
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What is the purpose of using a wedge?
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Think of a wedge as something you put in between objects, so it is a separates objects
4 0
2 years ago
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