A 10  and 20  resistor are connected in series across a DC voltage source. The total resistance is:

A. 30 Ohms

B. 200 Ohms

C. 15 Ohms

D. None of the above

A film is coated on the surface of a lens to maximize transmission at λ = 660 nm. If the index of refraction of the film is 1.

A boy standing on a 19.6 meter tall bridge sees a motorboat approaching the bridge at a constant speed. When the boat is 27 meters from the bridge, the boy drops a stone to the water below. If the stone strikes the water 3.

Consider two identical spherical balls submerged in water at different depths. Will the buoyant forces acting on these two balls be the same or different? Justify your answer.

Describe the main differences between the composition of Earth and that of the Sun.

Which of the following is not a concern regarding waste

Which statement best describes the effect of scientific advances on society? A. They always have a positive impact on society. B. They are inspired by the needs of society. C. they do not affect society beyond the community level. D.

Which is the best example of reusing? repairing a stove instead of buying a new one wearing a pair of pants made from cotton buying a toy packaged in paper instead of plastic placing a glass bottle in the recycling bin

The sunlight hits the surface of a lake this will like caused a. condensation b. transpiration c. evaporation d. sublimation

The development of the cell theory was mostly directly related to the

Choose the term that best completes the sentence. A way of grouping organisms based on the characteristics they share is The science of naming and classifying organisms is called A two-word system for naming organisms in which the first part is the