Answer: Rn :)))) no explanation needed
Explanation:
frequency =speed/wavelength
=5/0.5=10Hz
Answer:
Advantages: In small quantities they help your body produce vitamin D.
Disadvantages: They can cause sunburn or even skin cancer if used in large quantities.
Explanation:
I think D x=vxt because it's equation finding change of x (displacement) and using time
Answer:
A plain mirrior is a mirrior with flat reflective surface.
hope it is helpful for you.
