Explain Newton's First Law for the following.

If you walk across the room holding a ball, when should you drop it to ensure that it lands on a target? Before, after or when you are directly on the target?

A resistor, an inductor, and a capacitor are connected in series to an AC source. What is the condition for resonance to occur? The resistance must be equal to both the inductive reactance and the capacitive reactance.

Which of the following happens when unbalanced forces act on an object? The object remains stationary. The object moves with the same velocity. The object moves in the direction of the stronger force.

A vector A of magnitude 6 and another vector B have a resultant magnitude 12. The vector B: a. must have a magnitude of at least 6 but no more than 18 b. may have a magnitude of 20 c. cannot have a magnitude greater than 12 d.

Classify each of the following as a physical change or a chemical change. a) grinding glass: b) rusting of iron: c) burning a candle: d) sanding wood:

Which of the following statements is true about our galaxy? It contains one star. It contains several stars. It contains several thousand stars. It contains billions of stars.

You push a shopping cart filled with groceries (total mass = 20 kg) by applying a force to the cart 30° from the horizontal. If the force you apply has a magnitude of 86 N, what is the cart's acceleration? Assume negligible friction.

Does water expand more as the temperature drops even more below 0 deg? I am worried about the coolant in my rad. as the temp. is 40deg below.

A 1.00-kilogram ball is dropped from the top of a building. just before striking the ground, the ball's speed is 12.0 meters per second.

Why oil does not dissolve in water?

Which element has the highest number of protons? a. Calcium b. Argon c. Xenon d. Radon