Physics, 03.04.2020 15:39 anthonybowie99
A 17 W energy-efficient fluorescent lamp is designed to produce the same illumination as a conventional 68 W lamp. How much does this energy-efficient lamp save during 64 h of use? Assume a cost of $0.77/kW ยท h for electrical energy. Answer in units of dollars.
Answers: 3
Physics, 22.06.2019 00:20
Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant
Answers: 2
Physics, 22.06.2019 17:30
Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = โ16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s
Answers: 3
Physics, 22.06.2019 18:00
Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7
Answers: 1
A 17 W energy-efficient fluorescent lamp is designed to produce the same illumination as a conventio...
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