When a radar gun says the pitch is 90 miles per hour at what point in the balls travel to home plate is the radar gun measuring the velocity?

974

---

What are the weights in pounds of liquid gallons?

1074

---

What is neutral buoyancy?

983

---

What are newton s laws of motion?

1061

---

Why is it important not to expose a patient to x-rays for too long?

986

---

What is the proper formula used to calculate acceleration?

1067

---

What is a neutron?

989

---

Give one advantage of a scanning electron microscope over a transmission electron microscope?

964

---

When an object moves with constant velocity does its average velocity during any time interval differ from its instantaneous velocity at any instant?

1013

---

Which atomic model did erwin schrodinger create?

1053

---

What is pascal s principle?

1020

---

How much does automotive oil weigh?

1022

---

Who commanded the challenger’s first flight?

1077

---

How many astronauts travelled in the challenger?

1098

---

When was the first american rocket launched?

1091

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