12,815 Answered Questions for the topic physics

Physics

05/14/22

rotational motion
 Suppose you start an antique car by exerting a force of 290 N on its crank for 0.13 s.f = 290 Nt = 0.13 sd = 0.38 mWhat angular momentum is given to the engine if the handle of the crank is 0.38 m... more
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Physics

05/14/22

rotational motion
A merry-go-round at an amusement park consists of an outer ring of horses and an inner ring of elephants.The ring of eight horses has a radius of rh = 8.7 m. Each of the eight horses has a... more
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Physics

05/12/22

rotational motion
 Suppose you start an antique car by exerting a force of 290 N on its crank for 0.13 s.f = 290 Nt = 0.13 sd = 0.38 mWhat angular momentum is given to the engine if the handle of the crank is 0.38 m... more
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Physics

05/11/22

rotational motion
A merry-go-round at an amusement park consists of an outer ring of horses and an inner ring of elephants.The ring of eight horses has a radius of rh = 8.7 m. Each of the eight horses has a... more
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Physics

05/11/22

rotational motion
  A uniform disc of mass m = 2 kg and radius R = 0.75 m is suspended horizontally by a wire. Refer to the figure. A force of F = 65 N is applied to the edge of the disc tangentially. As a result,... more
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Physics

05/11/22

Linear motion problem
A kid is standing on amerry-go-round 0.825 m fromthe center. Starting from rest,they reach 1.08 rad/s in 3.47 s.What was his linear acceleration?Can someone answer this throughly ?
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Physics

05/11/22

Rotational motion

A kid is standing on amerry-go-round, 1.74 m fromthe center, rotating at 2.38 rad/sWhat is his linear velocity?Could someone answer this thourgly ?
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Physics

05/11/22

I need help please
A rock of mass 3KG is attach to the end of a 2 m long rope. The rock is swung and a vertical circle. That tangential velocity of the rock is 15 M/S. How long does it take in seconds for the rock to... more
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05/11/22

Spiderman stops a train

Background: Spiders can lift up to 8 times their own bodyweightThe force spiderman exerts is constant over the period of time he attempts to stop the train.The info given:The weight of the Train... more
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Physics

05/10/22

find the net electric field at the center of an square
find the net electric field at the center of the square of charges A(+5), B(+5), C(-5), D(-5) microcoulomb at the corners of the square ABCD separated by a distance of 1cm from each other
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Physics

05/09/22

Physic Homework
The “lead” in pencils is a graphite composition with Young’s modulus of approximately 1.0×109 N/m2. Calculate the change in length of the lead in an automatic pencil if you tap it straight into the... more
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Physics

05/09/22

Rotational Motion problem
A kid pushes a stationarymerry-go-round, creating anacceleration of 0.135 rad/s^2.How much time does it take the merry-go-round to complete2.00 rotations?can someone please answer this thourgly?
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05/09/22

VALUE OF RESISTOR
A resistor R in series with an 8 ohms resistor is connected across a 60 V voltage source delivering 2.5 A of current. What is the value of resistor R ?
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Physics

05/09/22

physics spring constant q
A 2000 kg mining cart rolls down a 50-meter, frictionless, inclined plane. The plane makes an angle of 10° with the horizontal. Just beyond the bottom end of the inclined plane, there is a... more
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Physics

05/08/22

speed of a satellite
Find the speed of a satellite in a circular orbit around the Earth with a radius 3.89 times the mean radius of the Earth; RE= 6.37·103 km ME= 5.98·1024 kg
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Physics

05/08/22

the equation of the parabola with (-2 ,0) as focus and x+4=0 is directrix is
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Physics

05/07/22

Reschedule payment

Hello,I rescheduled a session due to an emergency an hour before the session and was charged. I was not aware that a fee was charged for rescheduled lessons. Is there any way to waive this fee,... more
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Physics Math

05/07/22

Please derive how 1ml = 1g. Also, is ml the unit of volume?

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Physics

05/07/22

What is the age of the pole in years?
You take a course in archaeology that includes field work. An ancient wooden totem pole is excavated from your archaeological dig. The beta decay rate is measured at 610 decays/min.If a sample from... more
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Physics

05/07/22

Two particles are fixed to an x axis
Two particles are fixed to an x axis: particle 1 of charge q1 = 2.18 × 10-8 C at x = 17.0 cm and particle 2 of charge q2 = -4.41q1 at x = 78.0 cm. At what coordinate on the x axis is the electric... more
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Physics

05/07/22

You are given a number of 22 Ω resistors, each capable of dissipating only 2.1 W without being destroyed.

You are given a number of 22 Ω resistors, each capable of dissipating only 2.1 W without being destroyed. What is the minimum number of such resistors that you need to combine in series or in... more
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05/06/22

PLEASE HELPPP URGENTTTT!!!!! The flight of a javelin released 6.5 feet..... ANSWER ALL PART PLZ
The flight of a javelin released 6.5 feet from the ground at an initial velocity of 68 feet per second is modeled by the function h = -16t² + 68t + 6.5 where h is the height of the javelin in feet... more
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Physics

05/05/22

Session Payment
Hello,I am looking for a tutor. If I am not satisfied with the first session, will that session be free? And is it like that for all the tutors I see?Best,Alvi
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Physics

05/05/22

Rotational motion problems

A kid pushes a stationarymerry-go-round, creating anacceleration of 0.135 rad/s^2.How much time does it take themerry-go-round to complete2.00 rotations?Can someone answer this thourghly please?
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Physics

05/04/22

centripetal motion (FC)
The law has for 4 shapesF(c)= m.a(c)Fc=m×4π²r /T². (He He squared the law for the circumference of a circle so why is it r and not r²)F(c)= m v²/r. F(c)= m.4π² r . f². (Why it's... more
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