A 70 Ω resistor has a potential difference of 9 V. Calculate the current, across the circuit, in mA.

Give your answer to 2 significant figures.

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?