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astra-53 [7]
3 years ago
11

Which of the following best describes normal force? A. the force of attraction between two objects B. the force applied to an ob

ject by a push or a pull C. the force transmitted through a string, rope, or wire D. the support force exerted on an object which is in contact with another stable object
Physics
2 answers:
alexgriva [62]3 years ago
5 0
B. the force of applied to an object by a push or pull
Drupady [299]3 years ago
3 0

Answer:

D. the support force exerted on an object which is in contact with another stable object

Explanation:

When two bodies are in contact with each other then their contact surface will exert force on each other.

This is an electromagnetic force due to which two bodies will push each other in opposite directions.

This force always follows Newton's III law and hence it always exist in form of action and reaction pair.

So the correct answer for normal force is given as

D. the support force exerted on an object which is in contact with another stable object

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A surfer paddles out beyond the breaking surf to where waves are sinusoidal in shape, with crests 59.6 m apart. The surfer bobs
katrin [286]

Answer: y(x, y) = 2.14cos(6.04x - 8.29t)

wave speed (v) =1.38m/s,

wavelength ( λ) =59.6m

Amplitude (A) =2.14m

Wave number (k) =6.04

Angular frequency (ω) = 8.29rad/s

Explanation:

The wavelength is simply defined as the distance between 2 successive crest or trough.

From the question it has been stated that the crest are 59.6m apart, thus (λ) =59.6m.

The wave travels a total vertical distance of 4.28m, this simply implies that along the vertical axis of the sine graph, the wave traveled from maximum displacement to the positive y axis (+A) through the center (o) and to the maximum displacement to the negative axis (-A).

Meaning total vertical distance =2A where A=Amplitude

This amplitude is 4.28/2 = 2.14m

Wave number (k) =2π/(λ)

Where π=180°

Thus, k=2*180/59.6

K=360/59.6

K=6.04

To get the angular frequency of the wave(ω), we use the formulae above

(ω)=kv

Where v is the wave speed

v=vertical distance/time taken

v= 4.28/3.09= 1.31m/s

Thus

(ω)=kv=6.04 * 1.31 =8.29rad/s.

Equation of wave is below

y(x,t)=Acos(kx−ωt)

By slotting in the parameters we have that

y(x, y) = 2.14cos(6.04x - 8.29t)

Above is the mathematical equation that describes the wave.

3 0
3 years ago
Satellite C revolves around Earth 10 times a day. What is the radius of its orbit, measured from Earth's center? Assume that Ear
frez [133]

The radius of its orbit, measured from Earth's center, will be 1.44 × 10⁷ mm.

<h3>What is Newton's law of gravitation?</h3>

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Given data in problem is;

The mass of Earth is, \rm m_E = 5.98 \times 10^{24} \ kg

Gravitational constant, G =6.674 × 10⁻¹¹ N m₂/kg²

The gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

\rm F_g = \frac{Gm_sm_e}{r^2}

The centripetal force due to rotation of the satellite;

\rm F_c = \frac{m_s v^2}{r}

The centripetal and the gravitational force are equal;

\rm F_g = F_c  \\\\  \frac{Gm_sm_e}{r^2} =  \frac{m_s v^2}{r} \\\\ r = G \frac{m_E }{v^2 } \\\\ r = G \frac{m_E }{(r \omega )^2 } \\\\ r = \sqrt[3]{\frac{Gm_E}{\omega^2}} \\\\ r = \sqrt[3]{\frac{6.67 \times 10^{-11}(5.98 \times 10^{24})}{(3.63 \times 10^{-4})^2}} \\\\ r = 1.44 \times 10^7   \ mm

Hence, the radius of its orbit measured from Earth's center will be 1.44 × 10⁷ mm.

To learn more about Newton's law of gravitation, refer to the link.

brainly.com/question/9699135.

#SPJ1

8 0
2 years ago
It takes 105 j of work to move 2.7 c of charge from the negative plate to the positive plate of a parallel plate capacitor. what
wolverine [178]
Se necesita 105 j de trabajo para mover 2,7 c de carga de la placa negativa a la placa positiva de un condensador de placa paralela. Qué diferencia de tensión existe entre las placas

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What is the speed of sound in dry air if the temperature is 46°C?
maria [59]
The speed of sound at 46 C is 800.91 mph
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According to the theory of plate tectonics, the lithosphere is separated into sections that are called tectonic plates. These pl
loris [4]

Answer:

Transform :j

Explanation:

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