Magnetic poles that are unlike
a. attract each other.
b. repel each other.
c. do not interact.
d. point in the same direction.

An object of dimensions 50 cm x 40 cm x 0.20 cm has a mass 60g. find its density in g/cm3 and kg/ m3

Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency