Physics, 12.12.2019 02:31 jeffljr7385
Students connect a spring scale to a block on a rough horizontal surface. the students use the spring scale to measure the magnitude of the horizontal force needed to pull the block at a constant speed. which of the following statements explains why two forces exerted between objects ar equal in magnitude? a the gravitational and normal forces exerted on the block, because they are a newton's third-law pair. the frictional force and force exerted by the spring scale on the block, because they are a newton's third-law pair. the normal force and the frictional force exerted on the block, because objects always exert forces of equal magnitude on each other. the frictional forces that the block and the surface exert on each other, because objects always exert forces of equal magnitude on each other.
Answers: 2
Physics, 22.06.2019 16:50
Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.
Answers: 2
Physics, 22.06.2019 18:00
The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.
Answers: 1
Physics, 22.06.2019 19:00
Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe
Answers: 1
Physics, 24.06.2019 00:30
How do you determine the difference in time between the arrival of the primary (p) wave and the arrival of the secondary (s) wave during an earthquake? (in other words, how do you determine t? ) add the s and p waves subtract the s from the p wave subtract the p from the s wave multiply the s and the p waves?
Answers: 3
Students connect a spring scale to a block on a rough horizontal surface. the students use the sprin...
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