Physics, 11.02.2020 21:47 zetrenne73
A hole is drilled from the surface of Earth to its center. Ignore Earth's rotation and air resistance, and model Earth as auniform sphere. For the following answers, use g for theacceleration due to gravity, R_E for RE, andm, as necessary.)(a) How much work is required to lift aparticle of mass m from the center of Earth to Earth'ssurface?W = 1(b) If the particle is dropped from rest at the surface of Earth, what is its speed when it reaches the center of Earth?v = 2(c) What is the escape speed for a particle projected from thecenter of Earth?vesc = 3
Answers: 3
Physics, 22.06.2019 04:30
Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j
Answers: 1
Physics, 22.06.2019 14:40
The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg ยท s2). use g = 9.80 m/s2 and calculate the mass m of the ball.
Answers: 1
Physics, 23.06.2019 00:00
Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.
Answers: 1
Physics, 23.06.2019 05:00
Awaiver with a period of 0.008 second has a frequency of a. 800hz. b. 80hz. c. 125hz. d. 12.5hz.
Answers: 1
A hole is drilled from the surface of Earth to its center. Ignore Earth's rotation and air resistanc...
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