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Is Coulomb's law consistent with Newton's Third Law? In particular, how do
F^elec A-->B and F^elec B--->A compare in magnitude?
2 answers
asked by
Aliasa
854 views
In the Coulomb force equation, does the magnitude of the force increase as the distance between the charged objects decrease ?
1 answer
asked by
Aliyaa
440 views
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one
3 answers
asked by
Asiay
1,891 views
a small sphere with a mass of 108.0 g is moving along the y-axis when it encounters an electric field of 5.0i N/C . If the
1 answer
asked by
Asila
422 views
if the force vector F elect A-->B is in the positive direction form the unit vector r A-->B , the unit vector must be multiplied
1 answer
asked by
Su
458 views
Can the process of induction cause a neutral conductor to be repelled from a charged insulator? Explain.
1 answer
asked by
Aliyya
464 views
a charge of 1.0x10^-6 uC is located inside a sphere. What is the flux through the sphere?
3 answers
asked by
Belina
1,054 views
A boy of mass 50kg runs up a set of stress of total height 3.0m. Find the work done against gravity
3 answers
asked by
Commerade
827 views
a bullet is fired from at a shooting range. The bullet hits the ground after .32 seconds. How far did it travel horizontally and
1 answer
asked by
Marie
501 views
Sherlock Holmes examines a clue by holding
his magnifying glass (with a focal length of 17.0 cm) 12.4 cm away from an object.
3 answers
asked by
jeanette
577 views
A large rock with a mass of 38.2 kg is rolling at a speed of 4.8 m/s. How much power is needed to stop the rock in 7.2 seconds?
1 answer
asked by
Amanda
442 views
Calculate the mass m needed in order to suspend the leg shown in the figure(Figure 1) . Assume the leg (with cast) has a mass of
3 answers
asked by
Charles
1,084 views
Capacitors in parallel:
Give as clear as explanation as possible as to why it is physically reasonable to expect that two
3 answers
asked by
ikine4
615 views
Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min.
(a) What is the speed of the water
1 answer
asked by
Renee
665 views
What is the net charge on a capacitor in a circuit ? Is it ever possible for the charge on one conductor to be different than
1 answer
asked by
sahine
455 views
Why is the potential difference between the terminals of a battery is not always equal to the e m f of a battery
1 answer
asked by
Kenah
463 views
How much energy is required to change a 40 g ice cube from ice at -25°C to steam at 105°C?
Answer in J.
1 answer
asked by
Renee
810 views
Water enters a horizontal pipe with a rectangular cross section at a speed of 1.00 m/s. The width of the pipe remains constant
3 answers
asked by
mican
725 views
If a 35 g arrow moving at 160 km/h penetrates a block of wood suspended by a rope, what impulse is delivered to the block?
2 answers
asked by
Anonymous
593 views
A 135 g baseball traveling at a speed of 36 m/s hits a bat and moves back along its incoming trajectory with a speed of 47 m/s.
a
3 answers
asked by
Anonymous
685 views
A bullet strikes a ballistic pendulum whose target block has a mass of 4kg. The block is observed to rise a distance of 3cm, and
2 answers
asked by
Anonymous
804 views
A 220 g cart moves on an air track (a one-dimensional system in which motion is friction free) at 1.3 m/s. It collides with and
1 answer
asked by
Anonymous
406 views
Child 1 is 2.0 m from the axis of rotation, and child 2 is 1.5 m from the axis. The merry-go-round completes one revolution
1 answer
asked by
Anonymous
431 views
You hold a uniform, 26.0-g pen horizontal with your thumb pushing down on one end and your index finger pushing upward 3.2 cm
2 answers
asked by
Anonymous
546 views
A vacuum pump is connected to its electric motor by a belt drive (Fig. 9-40, not to scale). The motor rotates at a rate of 1000
2 answers
asked by
Anonymous
490 views
Two identical tops spin with angular velocities 45π rad/s up and 19π rad/s down, respectively, about vertical axes on a table.
2 answers
asked by
Anonymous
555 views
Please urgent help me
A cryogenic storage container holds liquid helium, which boils at 4.20 K. Suppose a student painted the
2 answers
asked by
suzan
493 views
A 29 kg board 3.2 m long is supported in a horizontal position at the two ends. A 77 kg worker stands 1.4 m from one end. What
1 answer
asked by
Anonymous
455 views
The maximum speed of a mass attached to a spring is vmax = 0.438 m/s, while the maximum acceleration is 1.53 m/s2. What is the
3 answers
asked by
Anonymous
460 views
The position of a mass on a spring is given by x = (7.6 cm) cos [2 π t / (0.82s)].
Where is the mass at t = 3.1 s? (Answer:
1 answer
asked by
Anonymous
374 views
The tension on a wire is 2640 N. The wire is 2.6 m long and the fundamental frequency is 330 Hz. What is the mass of the wire?
1 answer
asked by
Anonymous
369 views
a box is being pushed at a constant velocity. The coefficient of kinetic friction between the box and the surface is 0.3 . At
3 answers
asked by
Gin
623 views
Convert 1kwh to joules
1 answer
asked by
Syam
399 views
The density of gold is 19.3 g/ml. If the statue is solid gold, how much does it weight?
4 answers
asked by
Asma
732 views
How does Indiana decide how much sand to put into the bag? What does he appear to be doing? What assumption is he makin?
From the
4 answers
asked by
Asma
459 views
From equation x= A sin wt, prove that the acceleration of SHM is a= -w^2x
w is omega actually.. 2.using relationship between
2 answers
asked by
Syam
673 views
A ball is thrown vertically upward with a velocity(v) against the gravity. It reaches the maximum height(h) & returns back to
1 answer
asked by
AJOY
477 views
The distance between two nearest nodes of
a standing wave is 17.3 cm. Hand generated pulses move up and down through a complete
3 answers
asked by
Anonymous
540 views
A baseball of mass m and initial speed v strikes a catcher's mitt.
If the mitt moves a distance Δx as it brings the ball to
1 answer
asked by
Phu-Cuong
821 views
A1/2 inch diameter piston moves 10 inches when 30 Lbs of force is applied, how far will it move a 6 inch Diamter piston, and how
3 answers
asked by
Tonya
571 views
A 1/2 inch diameter piston moves 10 inches when 30 Lbs of force is applied how far will it move a 6 inch diamter piston and how
1 answer
asked by
Ann
516 views
I need someone that can help with a formula
any smart people. Law of universal gravitation f=g m 1 x m2 /r^2 needs to k ow what g
1 answer
asked by
Christian
354 views
A ball is thrown toward a cliff of height h with a speed of 28m/s and an angle of 60∘ above horizontal. It lands on the edge
2 answers
asked by
Please help me with the last question
1,281 views
6. A car is moving along a straight road at 60 mph [26.7 meter/sec ]. The driver makes slams on his breaks locking them so that
3 answers
asked by
Anonymous
948 views
Work is done when.
1 answer
asked by
Ed
324 views
A penny on its side moving at speed v slides off the horizontal surface of a table a vertical distance y from the floor.
a) Show
3 answers
asked by
Kay
1,837 views
Show the equation that 100g of 100C steam will completely melt 800g of 0C ice.
1 answer
asked by
Kay
743 views
A 2.28 kg bucket is attached to a disk-shaped pulley of radius 0.104 m and mass 0.712 kg.
If the bucket is allowed to fall,
4 answers
asked by
Anonymous
1,689 views
Two wave pulses on a string approach one another at the time t = 0, as shown in the figure below, except that pulse 2 is
3 answers
asked by
Anonymous
2,675 views
An electron is released from rest in a uniform electric field and accelerates to the north at a rate of 115 m/s^2.Determine the
2 answers
asked by
Syam
547 views
Two point charges of magnitude +40x10^-6C and -60x10^-6C are placed 50 cm apart. What is the distance from +40x10^-6C charge
3 answers
asked by
Syam
920 views
Determine, (at a point 10.0cm from a point charge of 100x10^-6C)
a. The electric potential b. Electric field strength
1 answer
asked by
Syam
424 views
Two point charges of magnitude +3.0 nC and +2.0 nC respectively are placed 2.0cm apart. Calculate the resultant electric field
2 answers
asked by
Syam
692 views
The distance of electron from the nucleus in a hydrogen atom is 5x10^-11m.Estimate the electrical potential energy of atom
1 answer
asked by
Syam
420 views
Two point charges of +40x10^-6C and -60x10^-6 are placed 50 cm apart. What is the distance from +40x10^-6 charge along the line
2 answers
asked by
Syam
1,201 views
The distance of electron from the nucleus in a hydrogen atom is 5x10^-11m.Estimate the electrical potential energy of atom
2 answers
asked by
Syam
554 views
Two capacitor 3.0 pico Farad and 6.0 pico Farad are connected in series. If the capacitor connected to a potential difference of
2 answers
asked by
Syam
535 views
A proton is shot into an electric field of magnitude 1x10^4 NC^-1.if the velocity of the proton as it enters the field is 1x10^6
1 answer
asked by
Syam
504 views
How to determine the direction of magnetic field?
3 answers
asked by
Syam
453 views
Hi, I'm learning about simple harmonic motion of a mass-spring system and I've been working at 2 problems for the past hour. I
3 answers
asked by
Elizabeth
1,432 views
What is the maximum height above ground a projectile of mass 0.67 kg, launched from ground level, can achieve if you are able to
2 answers
asked by
Anonymous
482 views
A bullet traveling horizontally at a speed of 350m/s hits a board perpendicular to its surface, passes through and emerges on
3 answers
asked by
Arneisha
582 views
A 25 gm bullet is fired into a 2.25kg ballistic pendulum and becomes embedded in it. If the pendulum moves a vertical distance
2 answers
asked by
tason
551 views
CFL light bulbs consume less power than their incandescent counterparts while providing about the same amount of light. Suppose
2 answers
asked by
cr
565 views
How to change 450 A cm^-2 of current density to si units
1 answer
asked by
Syam
387 views
A 60-g bullet fired at two blocks resting on a surface with coefficient of kinetic friction =0.5.
The bullet pass through a 8-kg
2 answers
asked by
Takako
725 views
You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 640 N and that of your
1 answer
asked by
Lena
630 views
A person pushes a 13.7-kg shopping cart at a constant velocity for a distance of 16.3 m on a flat horizontal surface. She pushes
2 answers
asked by
Lena
572 views
A person pulls a toboggan for a distance of 43.1 m along the snow with a rope directed 33.3 ° above the snow. The tension in
2 answers
asked by
Lena
551 views
A 287-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 25.6 ° below the horizontal. The
1 answer
asked by
Lena
476 views
A 16-kg sled is being pulled along the horizontal snow-covered ground by a horizontal force of 27 N. Starting from rest, the
1 answer
asked by
Lena
685 views
The concepts in this problem are similar to those in Multiple-Concept Example 4, except that the force doing the work in this
1 answer
asked by
Lena
771 views
1. Evaluate dF/dr when r=10,000, given that F= GmM/(r^2) and that F decreases by 3N/m when r=20,000.
2. The lowest point of a 5
3 answers
asked by
Anonymous
343 views
If your weight on Earth is 637 Newton, what is your mass in kg?
2 answers
asked by
Christian
883 views
A car accelerates from 5.0m/s to 22m/s in 18 seconds, find the acceleration.
1 answer
asked by
Christian
386 views
How far does a cyclist travel when she accelerates from rest to 6.5m/s in 22s?
3 answers
asked by
Christian
460 views
Two resistors when connected in series to a 120-V line use one-fourth the power that is used when they are connected in
2 answers
asked by
Allen
634 views
A 2.5-kohms and a 3.7-kohms resistor are connected in parallel; this combination is connected in series with a 1.4 kohms
1 answer
asked by
Allen
460 views
A 75-W, 120-V bulb is connected in parallel with 25-W, 120-V bulb. What is the net resistance?
2 answers
asked by
Allen
1,185 views
Calculate the total mass of 1.6x10^11 atoms of Na-22 isotope (given 1 mol of Na-22=22g)
2 answers
asked by
Aboi
525 views
A radioactive element x has half life of 30 days and will decay to become another new element Y..
a) calculate decay constant b)
3 answers
asked by
Aboi
598 views
A newly prepared radioisotope has activity 3.7x10^11 Bq. After 4 hours, its activity is reduced to 2.96x10^11.calculate
a) decay
1 answer
asked by
Aboi
386 views
A radioactive element x has half life of 30 days and will decay to become another new element Y..
a) calculate decay constant b)
1 answer
asked by
Aboi
478 views
A newly prepared radioisotope has activity 3.7x10^11 Bq. After 4 hours, its activity is reduced to 2.96x10^11.calculate
a) decay
1 answer
asked by
Aboi
381 views
A radioactive element x has half life of 30 days and will decay to become another new element Y..
a) calculate decay constant b)
2 answers
asked by
Aboi
654 views
A newly prepared radioisotope has activity 3.7x10^11 Bq. After 4 hours, its activity is reduced to 2.96x10^11.calculate
a) decay
1 answer
asked by
Aboi
401 views
A 1kg mass is dropped from a height of 40m. At what height will the velocity be 1/4 of the velocity attained before impact?
1 answer
asked by
Hafsat Abdulmalik
456 views
A crate of mass 20kg was moved up a rough plane inclined at 30degree to the ground. If the crate was moved a distance of 5m
3 answers
asked by
Hafsat Abdulmalik
727 views
A positive charge of 4.90 μC is fixed in place. From a distance of 3.20 cm a from the fixed positive charge, a particle of mass
2 answers
asked by
Julie
769 views
so i need to calculate the moment of inertia of the pulley and the angular
acceleration of the pulley. mass A = 9kg Mass B = 15kg
1 answer
asked by
john
718 views
A bullet of mass 0.05kg has a speed of 400cm|s. What is its kinectic energy? It hits a wall of which the average resistive force
2 answers
asked by
David
694 views
Find the current through each resistor in 2ohms and 3ohms in parrel and 4 ohms
1 answer
asked by
Ajuma
361 views
Find the current flowing through the each resistor in parel 2 ohms and 3 ohm in series 4ohm a and 20 volt
1 answer
asked by
Ajuma
407 views
Copy of Vector A has a magnitude of 9 and is at an angle of 30.4 degrees measured counter-clockwise from the x axis. Vector B
2 answers
asked by
elle
552 views
A quarterback (QB) is running at 3.2 m/s at an angle of 25 degrees with x axis as shown in the sketch. At the moment he's at the
2 answers
asked by
elle
578 views
A Coast Guard ship is traveling at a constant velocity of 4.13 m/s, due east, relative to the water. On his radar screen the
1 answer
asked by
Anonymous
591 views
Two blocks, m1 = 4 kg and m2 = 2 kg, are in contact with each other and are on a horizontal surface for which the coefficient of
2 answers
asked by
Anonimus
617 views
Block A of mass 2.2 kg is on block B of mass 5.2 kg as shown in the above figure. The lower block is on a frictionless surface
2 answers
asked by
Anonimea
585 views
You see a bolt of lightning and hear thunder two seconds later. The speed of sound is about 343 m/s. Estimate?
2 answers
asked by
Mary
996 views
A ball of mass(M) falls from a height through a distance of 20m. Calculate its velocity if air friction is negligible.(take
1 answer
asked by
Tony Tonero
387 views
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