Which of the following is a scalar quantity?

O A. 8 km/hr down

O B. 45 ft to the right

O C. 100 ft/min

O D. 25 m/s south

Water's states of matter include steam, liquid and ice. What about water is the same in these states? What can you conclude about what changes and what does not change during a change of state?

Using the definition of the scalar product, find the angle between the following vectors. (Find the smallest angle.) a) A = 5i - 9j and B = 5i - 5j (b) A = - 8i + 5j and B = 3i - 4j + 2k (c) A = - 2i + 2j and B = 3j + 4k

What is the frequency of an event?

Which best describes acceleration? A. distance over time B. speed in a particular direction C. change in velocity over time

A body weighs 160N in air and 120N when wholly immersed in a liquid of relative density 0.8. The relative density value of the body is (g=10ms-2) (a) 2.2 (b) 3.2 (c) 1.2 (d) 3.8

Which of the following equations are balanced correctly? A: Cu + H2O → CuO + H2 B: Zn + HCl → ZnCl2 + H2 C: 2C4H10 + 13O2 → 8CO2 + 10H2O D: 2Ag2O → 4Ag + O2

Two identical objects are moving directly toward one another at the same speed v. ~v - ~v m m What is the total kinetic energy of the system of the two objects?

Why would a long series of gradual ramps be better than one short, steep ramp for moving heavy blocks of stone?

Why are some liquids more viscous than others?

If a person weighs 125 lbs, 8oz., how many mg does s/he weigh