20 points and brainliest. Please help I really have to pass this. The tip of a glass rod has a hemispherical section removed from it. The radius of this section is 4.6 cm. A small object is placed a distance of 8.0 cm in front of the tip. What is the image distance? Let the indices of refraction n_glass = 1.56 and n_air = 1.00.
-5.1 cm
-10.0 cm
-2.9 cm
-6.3 cm

Acar tire contains 0.0380 m^3 3 of air at a pressure of 2.20 ×10^{5} 5 n/m^2 2 (about 32 psi). how much more internal energy does this gas have than the same volume has at normal atmospheric pressure, 1.01x10^5 5 pa?

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Which statement correctly describes a step-up transformer? a. it increases the amount of electric energy available. b. it increases the voltage of an electric current. c. it changes direct current into alternating current. d. it has more loops of wire in its primary coil.