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sergejj [24]
3 years ago
9

What do you understand by 'weightlessness due to freefall'? ​

Physics
2 answers:
Daniel [21]3 years ago
8 0

Answer:

Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it.

Tanya [424]3 years ago
3 0

Answer:

Weightlessness is simply a sensation experienced by an individual when there are no external objects touching one's body and exerting a push or pull upon it. ... When in free fall, the only force acting upon your body is the force of gravity - a non-contact force.

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A test charge of +4 µC is placed halfway between a charge of +6 µC and another of +2 µC separated by 20 cm. (a) What is the magn
S_A_V [24]

Answer:

(a) Magnitude: 14.4 N

(b) Away from the +6 µC charge

Explanation:

As the test charge has the same sign, the force that the other charges exert on it will be a repulsive force. The magnitude of each of the forces will be:

F_e = K\frac{qq_{test}}{r^2}

K is the Coulomb constant equal to 9*10^9 N*m^2/C^2, q and qtest is the charge of the particles, and r is the distance between the particles.

Let's say that a force that goes toward the +6 µC charge is positive, then:

F_e_1 = K\frac{q_1q_{test}}{r^2}=-9*10^9 \frac{Nm^2}{C^2} \frac{6*10^{-6}C*4*10^{-6}C}{(0.1m)^2} =-21.6 N

F_e_2 = K\frac{q_2q_{test}}{r^2}=9*10^9 \frac{Nm^2}{C^2} \frac{2*10^{-6}C*4*10^{-6}C}{(0.1m)^2} =7.2 N

The magnitude will be:

F_e = -21.6 + 7.2 = -14.4 N, away from the +6 µC charge

3 0
4 years ago
Fish in the aquarium looking much bigger than they are.
Alexandra [31]

b. Refraction

Explanation:

Fish in the aquarium are looking much bigger than they are due to refraction.

Refraction causes the path of light to bend and the velocity and wavelength attenuated.

This phenomenon occurs when light travels between two materials of different densities.

  • Air has a refractive index of 1
  • Water has a refractive index of 1.33
  • When light form water comes to air, the their angle changes.
  • This causes the magnification of the fish.

Learn more:

Refraction brainly.com/question/12370040

#learnwithBrainly

6 0
4 years ago
6. What is the wavelength of a wave that is traveling at 30 m/s and has a frequency of 3.2 Hz?
lidiya [134]

Answer:

6. 9.4 m

7. 1050 m/s.

Explanation:

6. Determination of the wavelength

Velocity (v) = 30 m/s

Frequency (f) = 3.2 Hz

Wavelength (λ) =?

v = λf

30 = λ × 3.2

Divide both side by 3.2

λ = 30 / 3.2

λ = 9.4 m

Thus, the wavelength of the wave is 9.4 m.

7. Determination of the speed of the wave.

Wavelength (λ) = 350 m

Frequency (f) = 3 Hz

Velocity (v) =.?

v = λf

v = 350 × 3

v = 1050 m/s

Thus, the speed of the wave is 1050 m/s

6 0
3 years ago
What can you do to promote Americanism and love of our country?
snow_tiger [21]
There are a couple of things one can do to promote Americanism and love of one's country. One thing that can be done is the promotion of American history and the explanation of why, how, and what has America achieved thus far and why that is something that should be looked at with respect. 
4 0
3 years ago
What's the distance between earth and Saturn?​
PilotLPTM [1.2K]

Answer:

the answer is 996.39 million miles

from Earth to Saturn

3 0
3 years ago
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