To practice problem-solving strategy 19.2: calorimetry problems. on a hot summer day, you decide to make some iced tea. first, you brew 1.50 l of hot tea and leave it to steep until it has reached a temperature of ttea = 75.0 ∘c. you then add 0.975 kg of ice taken from the freezer at a temperature of tice = 0 ∘c. by the time the mix reaches equilibrium, all of the ice has melted. what is the final temperature tf of the mixture? for the purposes of this problem, assume that the tea has the same thermodynamic properties as plain water. the specific heat of water is c = 4190 j/kg⋅∘c . the heat of fusion of ice is lf = 3.33×105 j/kg . the density of the tea is ρtea = 1.00 kg/l .

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

When does your body conduct current more readily?

Point charges q1 = 51 µc and q2 = −27 µc are placed 1.0 m apart, with q2 on the right. what is the force (in n) on a third charge q3 = 19 µc placed midway between q1 and q2? (assume the positive direction is to the right. indicate the direction with the sign of your answer.)