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DanielleElmas [232]
3 years ago
5

Leonard designed a parallel circuit to light two lightbulbs. But his circuit doesn't work. Which two items in the circuit must b

e addressed for the lightbulbs to light as planned?
Physics
2 answers:
olga_2 [115]3 years ago
4 0

Answer:

1. The source of power

2. Connection and accessories including, the power cable condition, switches and light bulbs

Explanation:

The items listed above should be tested with a suitable probe and any identified defective component should be replaced

olya-2409 [2.1K]3 years ago
3 0
The switch and the first lightbulb
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A man of 60kg moves in a lift of constant velocity 5m/s .What is the reactive force acting on the man by the elevator?
Flauer [41]

Answer:

588 N

Explanation:

Since the 60 kg is moving at a constant velocity there is no acceleration. In order for the system to be balanced, both the normal force and the force of gravity must be equal. In this case the man has a mass of 60 kg. So to find the force you multiply mass by gravitys constant (9.81). And you end up with an answer of 588.6 but I rounded to 588.

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Answer:

Two fundamental concepts govern energy as it relates to living organisms: the First Law of Thermodynamics states that total energy in a closed system is neither lost nor gained — it is only transformed. The Second Law of Thermodynamics states that entropy constantly increases in a closed system.

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Witch is the fastest way to send information, useing sound waves, light waves, or water waves
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3 years ago
I pull a wagon with a 30 kg child in it with a FORCE of 2000 N. The handle makes a 60 degree angle with the horizon. If I pull t
umka21 [38]

Answer:

1200000 J

Explanation:

Applying,

W = Fdcos∅....................... Equation 1

Where W = Workdone, F = Force applied to pull the wagon, d = distance, ∅ = angle with the horizontal.

From the question,

Given: F = 2000 N, d = 0.75 miles = (0.75×1600) = 1200 m, ∅ = 60°

Substitute these values into equation 1

W = 2000×1200×cos60°

W = 2000×1200×0.5

W = 1200000 J

Hence the work done in pulling the wagon is 1200000 J

3 0
3 years ago
A 85.0 cm wire of mass 9.40 g is tied at both ends and adjusted to a tension of 39.0 N . When it is vibrating in its second over
kodGreya [7K]

Answer:

frequency = 104.80 Hz

wavelength = 0.567 m

frequency = 104.80 Hz

wavelength = 3.27 m

Explanation:

given data

mass m = 9.4 g = 9.4 ×10^{-3} m

length L = 85 cm = 0.85 m

tension  T = 39 N

to find out

frequency and wavelength

solution

first we find frequency for second overtone

f = 3 /2L × √(T/μ)   .............1

put here all value and

here μ = m/L = 9.4 ×10^{-3} / 0.85 = 1.10588 ×10^{-2} kg/m

f = 3 /2(0.85) × √(39/1.10588 ×10^{-2})

f = 104.80 Hz

and

wavelength is 2L/3

wavelength = 2(0.85) / 3

wavelength = 0.567 m

and

frequency = 104.80 Hz

and

wavelength by speed of sound i.e 343 m/s

wavelength = speed / f

wavelength = 343 / 104.80

wavelength = 3.27 m

3 0
3 years ago
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