In a certain medium with µ =µ0, ɛ = 4ɛ0, H = 12e-0.1y sin (πx108t - ꞵy) ax A/m Find: 1. The wave period T, 2. The wavelength λ, 3. The electric field E, 4. The phase between E and H.

Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j

Which of the following are guidelines to follow for obtaining accurate observations

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )