All types of electromagnetic waves have a different wavelength and _ but the same _

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

Aman applies a force of 500n to push a truck 100m down the street how much does he do?

Dumbledore decides to gives a surprise demonstration. he starts with a hydrate of na2co3 which has a mass of 4.31 g before heating. after he heats it he finds the mass of the anhydrous compound is found to be 3.22 g. he asks everyone in class to determine the integer x in the hydrate: na2co3·xh2o; you should do this also. round your answer to the nearest integ