Gabby was swinging on a swing. At one point while she was swinging forward, her dad gave her a push forward. She noticed that she went up higher on that swing than she had the last time she reached the top of her swing.

Why did Gabby go higher on that swing?

A. Some of her kinetic energy was lost, and that gave her more potential energy.
B. She used energy when her dad pushed her, and that energy made her go higher.
C. The work done by her dad canceled out the work done by gravity.
D. Her dad did work on her, and that work gave her more energy.

Both josef loschmidt and amedeo avogadro contributed to our understanding of basic molecular numbers, sizes, and reaction ratios. neither scientist discovered “avogadro’s number” in the form we use it today (6.02 x 10 23). still, there’s a controversy over the name. research the contributions from these two scientists and read about how avogadro’s number got its name. briefly state what you think this number should be called, providing key details of each scientist’s contributions to this concept and a solid rationale for your case in naming the number.

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.