Auniform meter stick of mass $m$ has a half-filled can of fruit juice of mass $m$ attached to one end. the meter stick and the can balance at a point 20.8 cm from the end of the stick where the can is attached. when the balanced stick-can system is suspended from a scale, the reading on the scale is 2.58 n. calculate the mass of the meter stick.

Which statement best describes resistance? resistance is a. how well a current will flow in a material and is measured in volts. b. how well a material conducts an electrical charge and is measured in ohms. c. the ability of a material to attract a positive charge to create a current. d. the ability of a material to repel neutral charges and is measured in ohms.

Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.

Which subatomic particle has a negative charge