Answer:
Density = 11.4 g/cm³
Explanation:
Given data:
Density of lead = ?
Height of lead bar = 0.500 cm
Width of lead bar = 1.55 cm
Length of lead bar = 25.00 cm
Mass of lead bar = 220.9 g
Solution:
Density = mass/ volume
Volume of bar = length × width × height
Volume of bar = 25.00 cm × 1.55 cm × 0.500 cm
Volume of bar = 19.4 cm³
Density of bar:
Density = 220.9 g/ 19.4 cm³
Density = 11.4 g/cm³
<span>The waveform shown on an oscilloscope is a signal graph of voltage as a function of time.
Such a signal isn't considered by the oscilloscope to be traveling, and
hence the oscilloscope itself doesn't see the signal as a wave.
In the wire though, it "sort of" is a longitudinal wave of
electrons...but then again, there is more to the story. There is also a
radio EM wave in the surrounding electric and magnetic fields, and the
engineers interested in long distance signal transmission study these
fields to estimate velocity factor. </span>
Answer:
Copper sulphate is an acidic salt: It is the product of the reaction between a weak copper base and a strong acid , H2SO4
Litmus has a red colour in acidic solutions:
Conclusion: Acidic copper sulphate solution turns blue litmus to red
Baking soda is a basic salt : It is the reaction product of a weak acid , CO2 and a strong base , NaOH
Litmus has a blue colour in basic solutions:
Conclusion: basic baking soda solution turns red litmus to blue
I think A, I might be wrong though sorry
Answer:
It has 4 valence electrons
Explanation:
Tin atoms have 50 electrons and 50 protons with 4 valence electrons in the outer shell.
