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Elena L [17]
3 years ago
10

Why doesn't a transformer work with direct current? why is ac required?

Physics
1 answer:
Yuri [45]3 years ago
4 0
The electric field depends not on the magnetic field, but change in magnetic field. if the magnetic field is constant. electric field will be zero.
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What is Aerodynamic purpose in vhicle systems?​
BigorU [14]
Aerodynamic is relating to reduces the drag from air moving past
8 0
2 years ago
In the absence of air friction, an object dropped near the surface of the Earth experiences a constant acceleration of about 9.8
Ostrovityanka [42]

Answer:

O speed of the object increases 9.8 m/s during each second

a = 9.8 m/s/s

8 0
3 years ago
A car starts at rest. After 5 seconds the car is traveling at 40m/s. How far does the car travel in that time?
baherus [9]

v initial = 0m/s

v final = 40m/s

t = 5s

d = ?


The kinematic equation which relates these quantities:

d = 1/2(vinitial + vfinal)t

d = 0.5(0+40)(5)

d = 100m

5 0
4 years ago
If a violin string vibrates at 248 Hz as its fundamental frequency, what are the frequencies of the first four harmonics?
Andre45 [30]

Answer:

The frequencies of the first four harmonics are 248 Hz, 496 Hz, 744 Hz, and 992 Hz

Explanation:

Given;

fundamental frequency, f₀ = 248 Hz

Frequency of the nth harmonic = n x fundamental frequency

First harmonic, f₁ = 1 x f₀ = 248 Hz

Second harmonic;

2f₀ = 2 x 248 Hz = 496 Hz

Third harmonic

3f₀ = 3 x 248 Hz = 744 Hz

Fourth harmonic

4f₀ = 4 x 248 Hz = 992 Hz

Therefore, the frequencies of the first four harmonics are 248 Hz, 496 Hz, 744 Hz, and 992 Hz

6 0
3 years ago
Which of the following statements is false about photosynthesis and cellular respiration?
grigory [225]

Answer:

photosynthesis uses carbon dioxide

Explanation:

Consider the following statements:

1. Carbon dioxide, chlorophyll, and sunlight are all essential for photosynthesis.

2. Rate of photosynthesis is maximum in red light and minimum in green light.

3. Increase

concentration decreases the rate of photosynthesis.

Which of the statements given above are correct about photosynthesis?

7 0
2 years ago
Read 2 more answers
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