Answer:
v = 350 m/s
Explanation:
The speed of sound depends on the temperature of surrounding. The relation between the speed of sound and the temperature is given by :
Where, T is temperature in Celsius
Here, T = 30 degree Celsius
v = 349.3 m/s
or
v = 350 m/s
Therefore, the speed of sound in air at 30 degrees Celsius is 350 m/s.
b. a spinning neutron star emitted radio waves
A magnetic wave and electrical current moving in opposite directions
Explanation:
The attraction of the metallic objects is caused by the magnetic fields produced by the perpendicular vibration of magnetic waves and electric current moving in opposite directions.
- This vibrations causes the formation of magnetic fields.
- Such a device is called an electromaget
- It is a magnet that is produce when electric current produces magnetic fields.
- In the vicinity of magnetic objects, it will attract it.
- the construction worker is using an electrmagnet.
learn more:
Electromagnet brainly.com/question/2191993
#learnwithBrainly
Answer:
im no proffesional
Explanation:
but i tghink you need a proffessional for this one
Answer:
see attachment
Explanation:
all four questions have been explained in attachment