12,762 Answered Questions for the topic physics

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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Physics

05/03/22

If q1 and q2 have the same charge of 60 µC with a magnitude of the force between them is 500 N, what is the distance separated these two charges?
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05/03/22

Explain for each of the following cases, whether or not you are likely to be able to see your own reflection in a window
Window glass may be better at transmitting light than reflecting it, but there are certain circumstances where it is very clear that some light is reflected. Explain for each of the following... more
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05/03/22

A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?
A buoy floating on a lake is seen to rise and fall 20 times in a minute. What is the frequency with which the buoy oscillates?What is the period of motion?If water waves on the lake are traveling... more
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05/03/22

How much time would it take for a ray of light to travel between the two hills?
Galileo tried to measure the speed of light by having two people stand on hills about 5km apart. Eachwould hold a shuttered lantern. The first would open his lantern and when the second saw the... more
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Physics

05/02/22

Rotational motion/angular acceleration

A barrel ride at an amusement parkis turning 2.30 rad/s when it startsto slow down. After making 5.00revolutions, it is rotating at1.11 rad/s. How much time didthat take?(Unit = s)can someone... more
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