12,795 Answered Questions for the topic physics

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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Physics Math Science

05/04/22

PHYSICS Ray Diagrams
I have a few problems to solve about ray diagrams:PART 1:A certain concave, spherical mirror has a focal length of 53.0 cm. If the object is 42 cm high and is situated 155 cm in front of the... more
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Physics

05/04/22

Physic Question #3
By how much does a 66-kg mountain climber stretch her 0.596-cm diameter nylon rope when she hangs 30 m below a rock outcropping? (For nylon, Y=1.35 × 109Pa.) Round your answer to 4 decimal places
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Physics

05/04/22

Physics Question#2
TV broadcast antennas are the tallest artificial structures on Earth. In 1987, a 70-kg physicist placed himself and 344 kg of equipment at the top of a 647-m-high antenna to perform gravity... more
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Physics

05/04/22

Physics Question
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

05/04/22

physics and torque
helpDuring a very quick stop, a car decelerates at 6.8 m/s2. Assume the forward motion of the car corresponds to a positive direction for the rotation of the tires (and that they do not slip on the... more
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Physics

05/04/22

torque in physics
You have a horizontal grindstone (a disk) that is 93 kg, has a 0.33 m radius, is turning at 86 rpm (in the positive direction), and you press a steel axe against the edge with a force of 21 N in... more
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Physics

05/03/22

Item at position 4 Find the equivalent resistance of a 3.44 ohm, a 6.75 ohm, and a 9.27 ohm resistor sitting in series
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Physics

05/03/22

You pull a 70-kg crate at an angle of 30° above the horizontal. If you pull with a force of 600N and the coefficient of kinetic friction is .4, how far will it move in 3 seconds?

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