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Fantom [35]
3 years ago
15

The wavelength of radio waves sent out by an AM station is 600 meters (v = 3.0 x 10^8 m/s). At what frequency is the radio stati

on broadcasting?
Physics
1 answer:
iris [78.8K]3 years ago
4 0

Answer:

500,000 hertz

Explanation:

Wavelength= 600 meters

Velocity(b) = 3 × 10^8

Frequency=?

Therefore the frequency can be calculated as follows

Velocity= frequency × wavelength

Frequency= 3 × 10^8/600

= 500,000 hertz

Hence the frequency is 500,000 hertz

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A toy car has a kinetic energy of 8 J. What is its kinetic energy after a frictional force of 0.5 N has acted on it for 6 m?
Nezavi [6.7K]

Answer:

Final kinetic energy, KE_f=5\ J  

Explanation:

It is given that,

Kinetic energy of toy car, KE_i = 8\ J

Frictional force, F = 0.5 N

Distance, d = 6 m

We need to find the kinetic energy after this frictional force has acted on it. We know that frictional force is an opposing force. The work done by the toy car is given by :

W=F\times d

W=-0.5\ N\times 6\ m

W = -3 J

We know that the work done is equal to the change in kinetic energy. Let KE_f is the final kinetic energy.

W=KE_f-KE_i

-3=KE_f-8

KE_f=5\ J

So, the final kinetic energy is the toy car is 5 J. Hence, this is the required solution.

7 0
3 years ago
calcula la potencia por hora de un radiador, sabiendo que esta conectado a un contacto común 110 v. y requiere 20 Amp.
Ira Lisetskai [31]

calculate the power per hour of a radiator, knowing that it is connected to a common 110 v contact. and requires 20 Amp.

Answer:

2.2kWh

Explanation:

Given parameters:

Potential difference  = 110v

Current  = 20A

Unknown:

Power  = ?

Solution:

To solve this problem, we use the expression below:

        Power  = IV

 Power  = 110 x 20  = 2200W

  This is therefore 2.2kW

 Power per hour  = 2.2kWh

8 0
3 years ago
which surface would have the greatest friction? low carpet a gym floor a brand new sidewalk or gravel​
jasenka [17]
Carpet I’m guessing
7 0
3 years ago
In electroplating, the object to be plated is which part of an electrolytic cell? cathode or anode
Bingel [31]

Since the anode dissolves and goes to the cathode. The object to be electroplated is kept at the cathode.

Please mark me as brainliest.

7 0
3 years ago
Read 2 more answers
There are four springs stretched by the same mass. Spring A stretches 25 cm. Spring B stretches 10 cm. Spring C stretches 100 cm
saul85 [17]

Answer:

spring D stretches the weakest

6 0
2 years ago
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