A train travels 99 kilometers in 2 hours, and then 90 kilometers in 3 hours. What is its average speed?

Control and constant variables? Plez answer

What is the frequency of a wave that has a wave speed of 80m/s and a wavelength of 0.20m

Which statement best explains the relationship between electric force and the charges on two interacting objects? a. electrical force is directly proportional to the product of the charges on the two objects. b.

The acceleration due to gravity on the surface of planet X is 19.6 m/s2. If an object on the surface of this planet weighs 980.0 newtons, what is the mass of the object? A 50.00 kg B 100.00 kg C 490.0 N D 908.0 N

What is the difference between a scientific theory and a scientific law? A A scientific law states a pattern found in nature and a scientific theon explains that pattern. B A scientific theory and scientific law are actually the same.

What career has to do with one of these listed ... fossil fuels, nuclear energy, biomass, hydropower, solar energy, geothermal energy, or wind energy.

An object is suspended from the ceiling with two wires that make an angle of 40° with the ceiling. The weight of the body is 150 N. What is the tension in each wire? 41.6 newtons 82.3 newtons 150 newtons 117 newtons

What is the value of 9682 when rounded to three significant figures

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series