Virtual Lab Introduction: A student in a science lab is investigating heat transfer and thermal energy conservation as she mixes hot and cold water. She first measures out her
desired amount of cold water into a Styrofoam cup. She then measures out hot water from the faucet or from a pot hot water on her stove. After she
measures the temperature of the hot and cold waters, she pours the hot water into the cold water. She monitors the temperature of the mixed waters and
records the final temperature. She uses a standard thermometer to record the temperatures. She does three trials, which are shown below:
Trial 1
Trial 2
Trial 3k

In a vernier instrument the main scale is in 1/2 mm divisions .vernier is made by redividing 19 such divisions into 20 equal parts. calculate the least count of the instrument.

Jason and mia are both running in a race. as they approach the finish line, you being the physicist that you are decide to time how long it takes them to reach the end of the race. when you start your stop watch (you can take this as time t = 0 s) you notice that mia is an unknown distance d ahead of jason and both are moving with the same initial velocity v_0. you also notice that jason is accelerating at a constant rate of a_j, while mia is deaccelerating at a constant rate of -a_m. jason and mia meet each other for the first time at time t = t_1. at this time (t = t_1) jason's velocity is two times that of mia's velocity, meaning v_j (t_1) = 2v_m (t_1). a) draw the position vs. time graph describing mia's and jason's motion from time t = 0 to time t = t_1. clearly label your axes and initial conditions on your graph. b) draw the velocity vs. time graph describing mia and jason's motion from time t = 0s to time t = t_1. clearly label your axes and initial conditions on your graph. c) how long from when the stop watch was started at t = 0s did it take mia and jason to meet? express your answer in terms of know quantities v_0, a_m, and a_j. d) when the stop watch started at time t = 0s, how far apart, d, were mia and jason? express your answer in terms of know quantities v_0, a_m, and a_j.

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?