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USPshnik [31]
3 years ago
12

How many different values of l are possible for an electron with principal quantum number n=5?

Physics
1 answer:
lions [1.4K]3 years ago
7 0

Answer:

different value to l if n=5 are 0,1,2,3,4

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John heats 1 kg of soup from 25 °C to 70 °C for 15 minutes by a heater. How long does the same heater take to heat 1.5 kg of the
Mumz [18]

Answer:

30 minutes

Explanation:

Energy per time is constant, so:

E₁ / t₁ = E₂ / t₂

m₁C₁ΔT₁ / t₁ = m₂C₂ΔT₂ / t₂

(1 kg) C (70°C − 25°C) / 15 min = (1.5 kg) C (80°C − 20°C) / t

(1 kg) (45°C) / 15 min = (1.5 kg) (60°C) / t

3/min = 90 / t

t = 30 min

6 0
3 years ago
A physical system that is isolated from its environment is:
kompoz [17]

Closed

Explanation:

A physical system that is isolated from its environment is said to be a closed system.

In a closed system, energy can be exchange but matter cannot be exchanged.

  • A closed system sightly permits the only certain types of exchange.
  • These systems are usually used to control and limit the impact of the environment on a system.
  • Experiments can be conducted on the premises of any the interactions.

Learn more:

Momentum of an isolated system brainly.com/question/7973509

#learnwithBrainly

8 0
3 years ago
10. A satellites is in a circular orbit around the earth at a height of 360 km above the earth’s surface. What is its time perio
Afina-wow [57]

Answer:

Orbital speed=8102.39m/s

Time period=2935.98seconds

Explanation:

For the satellite to be in a stable orbit at a height, h, its centripetal acceleration V2R+h must equal the acceleration due to gravity at that distance from the center of the earth g(R2(R+h)2)

V2R+h=g(R2(R+h)2)

V=√g(R2R+h)

V= sqrt(9.8 × (6371000)^2/(6371000+360000)

V= sqrt(9.8× (4.059×10^13/6731000)

V=sqrt(65648789.18)

V= 8102.39m/s

Time period ,T= sqrt(4× pi×R^3)/(G× Mcentral)

T= sqrt(4×3.142×(6.47×10^6)^3/(6.673×10^-11)×(5.98×10^24)

T=sqrt(3.40×10^21)/ (3.99×10^14)

T= sqrt(0.862×10^7)

T= 2935.98seconds

4 0
2 years ago
How does a pin hole camera work? And how do we see through them?
DIA [1.3K]
A pinhole camera<span> is a simple </span>camera<span> without a lens but with a tiny aperture, a</span>pinhole<span> – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the </span>camera<span> obscura effect.</span>
6 0
2 years ago
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In a stadium, fans stand up and sit down to produce a wave across the stadium. This type of wave where the material travels perp
puteri [66]
Correct option B

Transverse waves are those waves whose particles vibrate perpendicular to the direction of wave.

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3 0
3 years ago
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