An electric immersion heater, 10 mm in diameter and 300 mm long, is rated at 550 w. if the heater is horizontally positioned in a large tank of water at 20c, estimate its surface temperature. estimate the surface temperature if the heater is accidentally operated in air at 20c.

Agalvanometer has an internal resistance of 100 ω and deflects full-scale at 2.00 ma. what size resistor should be added to the galvanometer to convert it to a milliammeter capable of reading up to 4.00 ma, and how should this resistor be connected to the galvanometer?

What is the final velocity of the initial velocity of 25 and -50?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.