A weightlifter is holding a 200-kg barbell at a height of 1
meter above the ground How much wo...
Physics, 25.03.2020 20:24 xoxoadara13ox07ck
A weightlifter is holding a 200-kg barbell at a height of 1
meter above the ground How much work is he performing?
Joules
Answers: 3
Physics, 21.06.2019 18:40
Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear
Answers: 3
Physics, 22.06.2019 11:50
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
Physics, 23.06.2019 02:40
An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)
Answers: 1
Mathematics, 06.03.2020 08:37
Computers and Technology, 06.03.2020 08:39
Mathematics, 06.03.2020 08:39
Computers and Technology, 06.03.2020 08:39
Mathematics, 06.03.2020 08:39
Mathematics, 06.03.2020 08:40