What type of substance is always made up of a single type of atom?

A 920 kg sports car collides into the rear end of a 2300 kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 3.3 m before stopping.

Mars has an orbital period of 1.88 years. in two or more complete sentences, explain how to calculate the average distance from mars to the sun, and then calculate it.

What are some things cyclists do to reduce friction?

Which pair of vectors below, if summed, would create a state of equilibrium (a resultant of 0i + 0j) ? a. 0i + 0j and 2i - 2j b. 2i + 2j and 2i - 2j c. 2i + 2j and - 2i - 2j d. 2i + 0j and 0i + 2j

Among three bases, x-, y-, and z-, the strongest one is y-, and the weakest one is z-. rank their conjugate acids, hx, hy, and hz, in order of decreasing strength.

Which statement is true? The speed of sound in air is inversely proportional to the temperature of the air. The speed of sound in air is directly proportional to the temperature of the air.

What is the molar mass of an ideal gas if a 0.800 g sample of this gas occupies a volume of 200. mL at 50.0 oC and 720. mm Hg?

When unequal resistors are connected in parallel in a circuit,?

A piano tuner hears three beats per second when a tuning fork and a note are sounded together and six beats per second after the string is tightened. What should the tuner do next, tighten or loosen the string? Explain.

How much work is done? A Net Force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The answers are 3.0 J, 9.0 J, 27 J, 81 J.