The total annual energy consumption in the US in 2020 was 92.9 quadrillion BTUs. How much mass (in kg) would need to be converted into energy to fuel this need? Sketch the situation, defining all the variables.
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The total annual energy consumption in the US in 2020 was 92.9 quadrillion BTUs. How much mass (in kg) would need to be converted into energy to fuel this need? Sketch the situation, defining all the variables.
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- Suppose that a person eats a diet of 2392 Calories per day. Convert this energy into kilowatt-hours. Express your answer using four significant figures. NOTE: that the energy is given in Calories (Cal), not in calories (cal). Depending on the capitalization of the first letter, these units differ by the equality. It is not .002801%A9 li. t LTET 4G+ Vol) O A X O U 9:-7 Second H.W.pdf 1. Draw and label the vector with these components. Then determine the magnitude and angle of the vector. a- Az = 3 ,A, = -2 b- B, = -2 ,B, = 2 2. What is the speed of horse in meter per second that runs a distance of 1.2 miles in 2.4 minutes? 3. A car moving along X- axis according on the function: X (t) = 2 t2 + 5t +7 on [1,2] Find: a- The average velocity. b- The acceleration at 3s. 4. Julie is walking around a track at a 2m/s for some exercise. She then decides to start jogging so she accelerates at a rate of 0.5m/s? for 3 seconds. How far did Julie travel from the time she started to accelerate to the end of the 3 seconds? 5. Ralph uses a 2000 to do this. force to push his car along a road for 1000 m. It takes him500 s a- Calculate the amount of work that Ralph did on the car. b- Calculate the amount of power that he generated. IIFor the remaining questions, you need to use Figure 1.4 to obtain the necessary orders of magnitude of lengths, masses, and times.Roughly how many times longer than the mean life of an extremely unstable atomic nucleus is the lifetime of a human?