A boy on a sled is pushed by his friend with a force of 15 N and he accelerates to 4.1 m/s2 after 5 m. Then the boy and his sister both sit on the sled and the friend again pushes with a force of 15 N and they accelerate to 2.1 m/s2 after 5 m. How does this support Newton’s 2nd Law of Motion? Answer in at least 3 sentences.

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Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

The main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !