Many types of scientific equipment are used to perform different functions in the science lab. which of the following combinations of equipment would be needed to bring one liter of water to 85°c?
a.
graduated cylinder, balance, beaker and hot plate
b.
graduated cylinder, beaker, thermometer and hot plate
c.
test tube, thermometer, and bunsen burner
d.
test tube, electronic balance and hot plate

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

Which accurately compares concave and convex lenses?

Consider a uniformly charged ring in the xy plane, centered at the origin. the ring has radius a and positive charge qdistributed evenly along its circumference. a)what is the direction of the electric field at any point on the z axis? . b)what is the magnitude of the electric field along the positive z axis? use k in your answer, where k=14πϵ0. d)the ball will oscillate along the z axis between z=d and z=−d in simple harmonic motion. what will be the angular frequency ω of these oscillations? use the approximation d≪a to simplify your calculation; that is, assume that d2+a2≈a2. express your answer in terms of given charges, dimensions, and constants