Answer:
4.5s
Explanation:
A sports car accelerates from zero to 30 mph in 1.5 s.
Joseph's experiment could be improved by using the same antenna at each part of the house during each trial instead of using different antenna. By doing so, he can obtain accurate results how is the signal in different part of the house under the same conditions (despite the location). So, he will see the dependence of the signal on the location. If he uses different antenna, than this antenna can also have influence of the signal.
He produced the first orderly arrangement of known elements, he used patterns to predict undiscovered elements
Set up the problem with the conversion rates as fractions where when you multiply the units cancel out leaving the desired units behind.
