What is the main basis on which sociologists have classified societies in human history?

a) size of community

b) type of food

c) level of knowledge

d) subsistence technology

Sally and Ramona were competing in a four-lap, one-mile foot race. Sally's style was to run at a constant rate of 12 mph.

You decide to visit santa claus at the north pole to put in a good word about your splendid behavior throughout the year. while there, you notice that the elf sneezy, when hanging from a rope, produces a tension of 455 n in the rope.

A box is being pulled to the right. What is the direction of the gravitational force?

What is the smallest radius of an unbanked (flat) track around which a bicyclist can travel if her speed is 29.0 km/h and the coefficient of static friction between tires and track is 0.

2. Who were the first philosophers to propose that atoms existed? What time period was this?

An object has an acceleration of 24 m/s/s. How long would it take the stationary object to reach a velocity of 6.8 m/s?

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.