Physics, 21.12.2019 03:31, daebreonnakelly
Asilver bar of length 30 cm and cross-sectional area 1.0 cm2 is used to transfer heat from a 100°c reservoir to a 0°c block of ice.
how much ice is melted per second? (for silver, k = 427 j/s⋅m⋅°c. for ice, lf = 334 000 j/kg.)
a. 4.2 g/s
b. 2.1 g/s
c. 0.80 g/s
d. 0.043 g/s
Answers: 3
Physics, 22.06.2019 01:30, markmeinberg
Ajet plane has a sound level of 120 db at a distance of 60 m. what is the q23. sound level at a distance of 6.0 km? (60)2 (6000)? om solution 80db db, hint: 16x assume ultrasound waves travel through the body of an animal at 1540 q24. m/s. if a 30,000 hz signal were reflected off a portion of a heart which was moving toward the source at 3 m/s, what frequency signal would return to the stationary source? solution 30.117hz
Answers: 3
Physics, 22.06.2019 11:40, johanperezpere51
Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?
Answers: 3
Physics, 22.06.2019 15:30, linnaefoos2183
This is the number of complete movements of a wave per second.
Answers: 1
Physics, 23.06.2019 04:00, justinjay0000
A200 g lead frying pan gains 2000 joules of heat. what is the change in temperature
Answers: 1
Asilver bar of length 30 cm and cross-sectional area 1.0 cm2 is used to transfer heat from a 100°c r...
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