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AURORKA [14]
3 years ago
6

What is an advantage of being a single-celled organism

Physics
1 answer:
vodka [1.7K]3 years ago
6 0
Multicellular organisms have a greater capacity for surviving under extreme environmental conditions
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An old mining tunnel disappears into a hillside. You would like to know how long the tunnel is, but it's too dangerous to go ins
PilotLPTM [1.2K]

Answer:

121.43 m

Explanation:

Solution

Since standing waves are set up, the expression for the first mode of frequency is f₁ = nv/4L. The next mode of frequency is f₂ = (n + 2)v/4L where L is the length of the tunnel and v the speed of sound. f₁ = 5.0 Hz, f₂ = 6.4 Hz, v = 340 m/s. We now subtract f₂ - f₁ = (n + 2)v/4L - nv/4L = v/2L.

So f₂ - f₁ = v/2L. and L = v/2(f₂ - f₁) = 340/[2× (6.4-5.0)] = 340/2×1.4 = 340/2.8 = 121.43 m

So, it is 121.43 m far to the end of the tunnel.

4 0
3 years ago
A simple model of the hydrogen atom suggests that the electron orbits the proton. What is the
andrey2020 [161]
If I remember correctly, the correct answer is either:
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or
     B. Gravitational
7 0
3 years ago
What minimum banking angle is required for an olympic bobsled to negotiate a 100-m radius turn at 35 m/s without skidding? (igno
Leviafan [203]
<span>51 degrees. Since we're ignoring friction, we have to have a banking angle such that the normal force is exactly perpendicular to the banked curve. Since this problem says "ignore friction", if the bank angle is too shallow, the bobsled would slide outwards if the banking angle is too shallow and would fall inwards if the banking angle is too steep. So we have to exactly match the calculated centripetal acceleration. The equation for centripetal acceleration is: F = mv^2/r I'll assume a mass of 1 kg to keep the math simple. Any mass could be used and the direction vectors would be the same except their magnitude would differ. So F = 1 kg * (35 m/s)^2/100 m F = 1225 kg*m^2/s^2 / 100 m F = 12.25 kg*m/s^2 The local gravitational acceleration is 9.8 m/s^2, so the sum of those vectors will have a length of sqrt(12.25^2 + 9.8^2) and an angle of atan(9.8/12.25) below the horizon. The magnitude of the vector doesn't matter, merely the angle which is: atan(9.8/12.25) = atan(0.8) = 38.65980825 degrees. The banking angle needs to be perpendicular to the force vectors. So 90 - 38.65980825 = 51.34019175 degrees. Rounding to 2 significant figures gives a bank angle of 51 degrees.</span>
5 0
2 years ago
The main difference between speed and velocity involves
grigory [225]
The main difference is direction.  C.

Speed is a scalar quantity, while Velocity is a vector quantity.
Speed is measured without taking into fact direction, but Velocity takes into fact the direction.
3 0
2 years ago
Ben walks 500 meters from his house to the corner store. He then walks back toward his house but stops to talk to a
motikmotik

Answer: 0.3

Explanation:

6 0
2 years ago
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