I think Y is the answer to number 4
Answer:
You can make an electromagnet stronger by doing these things: wrapping the coil around a piece of iron (such as an iron nail) adding more turns to the coil. increasing the current flowing through the coil.
Explanation:
Water vapour and a drop in temperature to condense water vapour into a cloud. Something to see the cloud also, such as "pollution" particles.
Answer:
A. 6.13 x 107
Explanation:
Given the expression
5.92 x 10^7 + 2.11 x 10^6
First, we need to convert to the whole number
5.92 x 10^7 = 59200000
2.11 x 10^6 = 2110000
Add both values
59200000 + 2110000
= 61,310,000
Express in standard form
= 6.13 * 10^7
This gives the required result
<span>Length that is distance s = 4.00m
Speed of sound in air V = 343 m/s
Time for metal = 11.0ms = 0.011
Calculating the time t = s / V = 4 / 343 = 0.01166s
Time for the sound in the metal = 0.01166 - 0.011 = 0.00066 = 6.6 x 10^-4s
Speed of sound in metal Vm = 4 / 6.6 x 10^-4 = 6.060 x 10^3 m/s</span>
