If a train conductor is describing the speed of the train as well as the direction the train is going, then the train conductor is said to be describing the train's. a. acceleration. b. speed. c. velocity d. magnitude

Which of the following quantities are unknown? initial separation of the particles final separation of the particles initial speed of the proton initial speed of the alpha particle final speed of the proton final speed of the alpha particle mass of

The size of a quantity is called: Attitude Longitude Magnitude Vector None of these

Energy, light, and sound all travel as

This law states that oppositely charged objects will exert an attractive force on each other while two objects that have like charges will repel each other.

What holds the stars together in their galaxies? A. light B. orbits of the planets C. weight D. gravity

Which statement about a right triangle is NOT true? CLEAR CHECK The hypotenuse is the longest side of the triangle. The square of the hypotenuse is equal to the sum of the squares of the other two lengths.

Seasons are a result of: Earth's rotation on its axis Earth's tilt on its axis global air circulation patterns global humidity circulation patterns

While competing in the olympics, an athlete hurls a discus with a velocity of 14 m/s at an angle of 51. what is the horizontal component of the discus's velocity?

2. A 1.00 x 103 kg sports car accelerates from rest to 25.0 m/s in 7.50 s. What is the average power output of automobile engine? a. 20.8 kW b. 30.3 kW C. 41.7 kW

Explain what is meant by the term "electrical resistance"