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Ksenya-84 [330]
2 years ago
12

What do you think is the reason scientists use an ellipse rather than a circle as

Physics
1 answer:
PilotLPTM [1.2K]2 years ago
5 0

Answer:

Newton's laws of motion and gravity explained Earth's annual journey around the Sun. Earth would move straight forward through the universe, but the Sun exerts a constant pull on our planet. This force bends Earth's path toward the Sun, pulling the planet into an elliptical (almost circular) orbit.

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A complex sound’s quality depends on the mix of harmonics or overtones added to the ______________ frequency
Brilliant_brown [7]
Fundamental frequency is the "base frequency" upon which the sound is built.
4 0
3 years ago
Which of the following statements best describes the method of energy conservation known as cogeneration?
Mazyrski [523]

Answer:

heat and power

Explanation:

is the simultaneous production of electricity and heat both of which are used

6 0
3 years ago
Can someone answer this?
tatiyna
I’m sure gravitation should be at the river sorry if I’m wrong
6 0
3 years ago
A string, 30 cm long and having a mass of 45 g, is attached to a 810 Hz oscillator at one end. The other end of the string is fi
Karolina [17]

Answer:

870 N

Explanation:

The expression for velocity of wave in a string is given below

v = \sqrt{\frac{T}{m} }  , T is tension and m is mass per unit length .

m = 45 x 10⁻³ / 30 x 10⁻²

= .15 kg/m

Putting the given values in the equation

76 = \sqrt{\frac{T}{.15} }

T = 76² x .15

= 866.4

870 N  approx.

3 0
3 years ago
Suppose the posted designated speed for a highway ramp is to be 30 mph and the radius of the curve is 700 ft. At what angle must
Basile [38]

Answer:

4.92°

Explanation:

The banking angle θ = tan⁻¹(v²/rg) where v = designated speed of ramp = 30 mph = 30 × 1609 m/3600 s = 13.41 m/s, r = radius of curve = 700 ft = 700 × 0.3048 m = 213.36 m and g = acceleration due to gravity = 9.8 m/s²

Substituting the variables into the equation, we have

θ = tan⁻¹(v²/rg)

= tan⁻¹((13.41 m/s)²/[213.36 m × 9.8 m/s²])

= tan⁻¹((179.8281 m²/s)²/[2090.928 m²/s²])

= tan⁻¹(0.086)

= 4.92°

4 0
3 years ago
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