Why is it that the properties of pure substance do not vary from sample to sample

A cubical water tank with edges measuring 10 feet in length is initially full of water. If the tank were then to lose water at a constant rate of 10 cubic feet per second, in how many seconds would the tank be full?

Which has covalent bonds? A. Glucose B. table salt C. Steel Alloy D. Iron Oxide - Rust

Explain how the energy of a rubber ball is transformed as it rolls down a ramp.

A large fish hangs from a spring balance supported from the roof of an elevator. If the elevator has an upward acceleration of 2.45 m/s 2 and the balance reads 60.0 N, what is the true weight of the fish?

One advantage of conventional nuclear power, when compared to coal, is a. no related occupational deaths. b. limited risk from catastrophic accidents. c. no contribution to global warming. d. unlimited supply of raw materials.

Which represents a system that is almost completely closed?

If many household substances classify as acids or bases what is the ph scale

A protostar forms once the nebular cloud condenses and the core begins

How do whales bats and dolphins use echolocation? A To scare away predators B To attract mates C To orient them selves and find food D To tell animals of there species where they are

How much force would be needed to move a car with the mass of 100kg to an acceleration of 5m/s/s?