When copper combines with oxygen to form copper oxide, the charge of the copper ion is

Which of the following statements is considered weather? It is very hot in the desert. It snows a lot in Antarctica. The sun is always shining in Arizona. There is a tornado in Oklahoma right now.

Intr-o grupa, 3 elevi au masurat lungimea unui creion si au obtinut urmatoarele valori: 16,2 cm; 16,5 cm si respective 16,1 cm. Aflati valoarea medie a valorilor masurate si erorile obtinute de fiecare elev.

Lasers can be used in in place of a knife.

In rutherford's gold foil experiment what kind of particles in dense atomic nuclei caused some alpha particles to bounce straight back from the gold foil

True or false according to scientists you do work only when you exert energy

A crowd in a stadium is heard by a man standing 823.2 m away. The man hears the noise 2.5 seconds after the noise occurs. How fast was the sound traveling? What's the answer?

Which is not support the theory of plate tectonics?

the acceleration of a body in free fall depends on the place or the world in which it is, true or false?

A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. the square loop is then re-formed into a circular loop, which also consists of a single turn and is also perpendicular to the same magnetic field.

A thin cylindrical shell and a solid cylinder have the same mass and radius. The two are released side by side and roll down, without slipping, from the top of an inclined plane that is 1.8 m above the ground.