Which sentence best describes the runner whose velocity-time graph is shown here? The runner ran forward for 2 seconds, and then backward for 2 more seconds.

The runner ran forward for 4 seconds - slowly for the first 2 seconds, then faster for the last 2 seconds.

The runner ran forward for 4 seconds - fast for the first 2 seconds, then more slowly for the last 2 seconds.

The runner stood still for 2 seconds, then moved suddenly, and then stood still again for 2 more seconds.

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

Sasha has just gotten a new job in a nearby city. after comparison shopping, she found that renting a nice two-bedroom apartment would cost around $800 per month. her utilities would cost about $150 per month. sasha has enough money saved for a down payment, and she found that she can buy a three-bedroom house or condo with a mortgage payment of $1,000 per month, including taxes and homeowner's insurance. her utilities would cost about $200 per month. what is the advantage of buying the house over renting the apartment?

Acar driving 22.7 m/s on flat ground drives off a 42.3 m high cliff. how much time does it take to reach the ground?