Physics, 20.09.2020 09:01 jacckiie5176
The coordinate axes of the reference frame S′ remain parallel to those of S, as S′ moves away from S at a constant velocity v⃗ SS′=(4.0iˆ+3.0jˆ+5.0kˆ)m/s. (a) If at time t = 0 the origins coincide, what is the position of the origin O′ in the S frame as a function of time? (b) How is particle position for r⃗ (t) and r⃗ ′(t), as measured in S and S′, respectively, related? (c) What is the relationship between particle velocities v⃗ (t)andv⃗ ′(t)? (d) How are accelerations a⃗ (t)anda⃗ ′(t) related?
Answers: 3
Physics, 22.06.2019 03:30
Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n
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Physics, 22.06.2019 03:50
A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c
Answers: 3
Physics, 22.06.2019 13:30
If the spring constant k of a pogo stick is 3500 n m and the weight of the person on the pogo stick is 700 n, how much is the spring in the botom of the pogo stick compressed?
Answers: 2
Physics, 22.06.2019 23:30
Newton's law of cooling states that the rate of change in the temperature t(t) of a body is proportional to the difference between the temperature of the medium m(t) and the temperature of the body. that is, startfraction dt over dt endfraction equals upper k left bracket upper m left parenthesis t right parenthesis minus upper t left parenthesis t right parenthesis right bracket , where k is a constant. let kequals0.04 left parenthesis min right parenthesis superscript negative 1 and the temperature of the medium be constant, m(t) font size decreased by 3 equivalent font size decreased by 3 294 kelvins. if the body is initially at 369 kelvins, use euler's method with hequals0.1 min to approximate the temperature of the body after (a) 30 minutes and (b) 60 minutes.
Answers: 2
The coordinate axes of the reference frame S′ remain parallel to those of S, as S′ moves away from S...
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