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2 years ago

Why do remote controls for TV’s use infrared waves to communicate?

1 answer:

3 0

Answer: An IR remote (also called a transmitter) uses light to carry signals from the remote to the device so it can be controlled. It emits pulses of invisible infrared light that correspond to specific binary codes. These codes represent commands, such as power on, volume up, or channel down.

Explanation:

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An 19-cm-long bicycle crank arm, with a pedal at one end, is attached to a 23-cm-diameter sprocket, the toothed disk around whic

Cloud [144]

Answer:

The tangential acceleration of the pedal is 0.0301 m/s².

Explanation:

Given that,

Length = 19 cm

Diameter = 23 cm

Time = 10 sec

Initial angular velocity = 65 rpm

Final velocity = 90 rpm

Suppose we need to find the tangential acceleration of the pedal

We need to calculate the tangential acceleration of the pedal

Using formula of tangential acceleration

$a_{t}=r\alpha$

$a_{t}=\dfrac{23\times10^{-2}}{2}\times\dfrac{\omega_{2}-\omega_{1}}{t}$

$a_{t}=\dfrac{23\times10^{-2}}{2}\times\dfrac{90\times\dfrac{2]pi}{60}-65\times\dfrac{2\pi}{60}}{10}$

$a_{t}=0.0301\ m/s^2$

Hence, The tangential acceleration of the pedal is 0.0301 m/s².

4 0

2 years ago

Refer to the drawing that accompanies Check Your Understanding Question 14. Suppose that the voltage of the battery in the circu

Gnoma [55]

Answer:

Maximum speed of the rod, v = 10.34 m/s

Explanation:

It is given that,

Voltage of the battery, V = 2.7 V

The magnetic field perpendicularly into the plane of the paper is, B = 0.9 T

Length of the rod between the rails, l = 0.29 m

Due to the motion of the rails inside the magnetic field, an emf will induced in it which is given by :

$\epsilon=Blv$

v is the speed attained by the rod

$v=\dfrac{\epsilon}{Bl}$

$v=\dfrac{V}{Bl}$

$v=\dfrac{2.7}{0.9\times 0.29}$

v = 10.34 m/s

So, the maximum speed attained by the rod after the switch is closed is 10.34 m/s. Hence, this is the required solution.

4 0

2 years ago

INQUIRY IS A TYPE OF SCIENCE PROMPTED BY A QUESTION<br> TRUE OR FALSE

slamgirl [31]

The answer is clearly True

4 0

3 years ago

Read 2 more answers

What is the speed of an object that moves from 70 m to 68 m in 14 s?

PtichkaEL [24]

Speed = m/s
Velocity can be negative, but speed cannot.

70 - 68 = 2
2/14 = 0.143 m/s

5 0

2 years ago

Cooling systems, such as air conditioners and refrigerators, transfer thermal energy in order to keep homes and cars cool or to

Lubov Fominskaja [6]

Answer: I think maybe thru Convection?

Explanation:

cause convection causes the heat to stay to the top and the cold air stay's to the bottom so maybe i would say Convection.... Is there any answer choices?

8 0

3 years ago