Physics, 07.12.2019 04:31 rosetoheart2
An astronaut on the moon pushes with her left hand on a small rock and with her right hand on a large rock. each hand pushes with a force of 15 n. the small rock has mass 2 kg and the large rock has mass 8 kg. what forces do the rocks exert on the astronaut?
the small rock exerts a pushing force of 20 n; the large rock exerts a pushing force of 78 n.
the small rock exerts a pushing force of 3 n; the large rock exerts a pushing force of 12 n.
each rock exerts a pushing force of 7.5 n.
each rock exerts a pushing force of 15 n.
Answers: 2
Physics, 21.06.2019 17:30
What produces light and all other electromagnetic waves? a) the photoelectric phenomena b) heated metals c) charged particles d) radioactive samples (pls explain if you can : )
Answers: 1
Physics, 21.06.2019 22:30
Astudent is given an assignment to demonstrate diffraction. he takes a photograph of a straw in a glass of water. the straw appears bent at the water level. which best describes this example? a) this is a good example of diffraction. b) this is an example of dispersion and not diffraction. c) this is an example of refraction and not diffraction. d) this is an example of reflection and not diffraction.
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, 22.06.2019 12:30
As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?
Answers: 1
An astronaut on the moon pushes with her left hand on a small rock and with her right hand on a larg...
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50
Mathematics, 28.01.2021 07:50