According to the standard model of particle physics, what is the name for the three leptons that have no electric charge and little if any mass?

1021

---

assuming friction is negligible, if a lever has a mechanical advantage of 5, how much effort in newtons is needed to lift a 10 newton load?

984

---

How does laser printer works?

1047

---

What are isotopes?

1227

---

Advantage of fixed pulley?

966

---

Physics short answer to two significant figures, what is the index of refraction of air?

1002

---

All elements with an atomic number greater than what number are unstable?

1111

---

What is parallel force?

1035

---

When a green colored object is illuminated by a green light it will appear as what color to the human eye?

992

---

What is the difference between a lens and a mirror?

1171

---

When gravity is the only force acting on an object the object is in what?

1193

---

Which way do twin screw props on a boat rotate when propelling the boat forward?

965

---

A car traveling at 30mph ( =13.4 m/s) & it slams on its brakes. ( The car is decelerated by the force of the friction 0.7..f *distance x. (Weight=mg) how far will the cargo before it stops?

932

---

What does hull speed mean?

1199

---

This person established the one fluid theory of electricity and performed some of the first investigations into electrical grounding and insulation:

994

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