If a substance cannot be separated by physical means or chemical means, it is question 19 options: an element a compound a mixture heterogeneous a solution

Suppose a wire with a current is pushed upward by a magnetic field. how would the wire move if the direction of the current reversed? explain your answer.

In which of the following is positive work done by a person on a suitcase

Which are true about beta reactions? there will be more than one answer. a. it has no change b. it doesn't change the mass of the number c. it has a mass of 0.0005 atoms d. it causes transmutation.