The angle a vector makes with the x-axis of a coordinate system must be what size in order to make one or more of its components negative?

less than 30 degrees

between 30 and 60 degrees

between 61 and 90 degrees

greater than 90 degrees

What frequency corresponds to a period of 4.31s. T = 1/f = 1/4.31s = 0.232hz correct?

Give one example of a protista.

The mass of an atom, measured in atomic mass units, is A. Exactly equal to the atomic mass number B. Always very close to the atomic mass number. A but could be a little more or a little less. C. Always slightly more than the atomic mass number A D.

When a particle of mass m is at (x comma 0) , it is attracted toward the origin with a force whose magnitude is StartFraction y Over x squared EndFraction.

A car is traveling at 16m/s when the brakes are applied. The brakes decelerate the car at the rate of 5.0m/s^2. How long will it take to stop the car?

An elevator weighing 15000 newtons s raised in 50 seconds. If the distance between stories is 3.0 meters how much power is required of the motor?

Given the diamond shape of a baseball field and the speed with which baseballs are hit, why is it harder for a hitter to hit a homerun to center field than to right or left field? (Consider the effect of air drag on fast moving projectiles.)

What is the arrangement of the forms of electromagnetic radiation according to their wavelengths?

A helium atom consists of two protons, two electrons, and two neutrons. In the helium atom, the strong force is a fundamental interaction between the (1) electrons, only (2) electrons and protons (3) neutrons and electrons (4) neutrons and protons

What is the term for water droplets that have accumulated in the air until they have become so heavy they have fallen back to earth?