Questions Answered

ndawg201:
Two point charges q_1 = 2.10 nC and q_2 = 6.20 nC are 0.100 m apart. Point A is midway between them; point B is 0.080 m from q_1 and 0.060 …
 updated one year ago
 7 replies
 1 Medal

woleraymond:
A tiny ball of mass 0.6g is suspended from a rigid support with a piece of thread in a horizontal electric field of intensity 700N/C. The b…
 updated one year ago
 6 replies
 2 Medals

sheetalvee:
How would i write f(x)=2x+30 in inverse. the answer is f(x)=1/2(x30) but i dont know the steps to get that answer
 updated one year ago
 1 reply
 No Medals Yet

ketz:
Use Coulomb’s Law to determine the magnitude and direction of the electric field EB at
point B in the diagram due to the two positive charg…
 updated one year ago
 26 replies
 1 Medal

woleraymond:
derive an expression for the work done in putting the four charges together as shown below
 updated one year ago
 101 replies
 2 Medals

mayankdevnani:
A train of length 200 m travelling at 30 m/s overtakes another train of length 300 m travelling at 20 m/s. The time taken by the first train…
 updated one year ago
 44 replies
 3 Medals

woleraymond:
A small tropical fish is at the center of a spherical fish bowl 1m in diameter. Determine the position and the lateral magnification of the …
 updated one year ago
 36 replies
 1 Medal

Leela:
A converging lens with a focal length of 30 cm is used to create an image of a 2.0 mm long ant. The ant is placed perpendicularly to the opt…
 updated one year ago
 8 replies
 2 Medals

woleraymond:
An infinite charged sheet has a surface charge density of 1 x 10^7 Cm^2 .How far apart are the equipotential surfaces whose potentials dif…
 updated one year ago
 10 replies
 2 Medals

woleraymond:
Find the potential at two points A and B at distances 10cm and 50cm from a charge of 2uc in the figure attached. Also find the work needed t…
 updated one year ago
 3 replies
 1 Medal

woleraymond:
Prove that the vectors u = 3i + j  2k , v = i + 3j+ 4k and w = 4i  2j  6k can form the sides of a triangle
 updated one year ago
 4 replies
 1 Medal

woleraymond:
Find the electric potential at point A and B due to two small sphere X and Y 1.0m apart in air and carrying charges of +2.0 x 10^8 C 2.0 x…
 updated one year ago
 4 replies
 1 Medal

richyw:
Two identical conducting spheres are places with there centers 0.3m apart. one is given a charge of 12nC and the other a charge of 18nC
…
 updated one year ago
 7 replies
 1 Medal

woleraymond:
A body hangs from a spring balance supported from the roof of an elevator. if the elevator has an upward acceleration of 3m/s^2 and the bala…
 updated one year ago
 18 replies
 3 Medals

woleraymond:
a 150kg ladder leans against a smooth wall,making an angle 30 degrees with the floor.The center of gravity of the ladder is one third the wa…
 updated one year ago
 19 replies
 1 Medal

woleraymond:
A rope suspended from a ceiling supports an object of weight W at its opposite
end .Another rope tied to the first at the middle is pulled …
 updated one year ago
 3 replies
 No Medals Yet

woleraymond:
A boat propelled so as to travel a speed 0.5m/s in still water , moves directly(in a straight line) across a river that is 60m wide. The ri…
 updated one year ago
 3 replies
 1 Medal

woleraymond:
A monkey in a perch 20m high in atree drops a coconut above the head of a zoo keeper as he runs with a speed 1.5m/s
beneath the tree. How f…
 updated one year ago
 4 replies
 1 Medal

shana16:
( Help Please )
1.Which of the following is an example of a physical change to matter?
…
 updated one year ago
 3 replies
 No Medals Yet

woleraymond:
The resultant of vectors A and B has a magnitude of 20units. A has a magnitude of 8units and the angle between A and B is 40 degrees. calcu…
 updated one year ago
 9 replies
 1 Medal

kirscute:
Which of the ff is a variable quantity:
a. minutes in an hour
…
 updated one year ago
 1 reply
 1 Medal

laura115:
A 1000 Ω resistor is in a circuit with 30.0 mA flowing through it. A voltmeter with internal resistance 1000 Ω is used to measure the voltag…
 updated one year ago
 6 replies
 1 Medal

oluadeforreal:
express 127oy in degree celsius
 updated one year ago
 1 reply
 No Medals Yet

Prof.Grace:
A cart is moving horizontally along a straight line with constant speed of 30 m/s. A projectile is fired from the moving cart in such a way …
 updated one year ago
 11 replies
 No Medals Yet

woleraymond:
Which of these is NOT a statement of Newton’s law of universal gravitation?
a. gravitational force between two particles is attractive as w…
 updated one year ago
 11 replies
 4 Medals

Prof.Grace:
An object is thrown upward from the edge of a tall building with a velocity of 10 m/s. Where will the object be 3 s after it is thrown? Take…
 updated one year ago
 12 replies
 No Medals Yet

woleraymond:
Which of the following properties of a ball is conserved as it falls freely in a vacuum?
a kinetic energy
b gravitational potential energy…
 updated one year ago
 6 replies
 3 Medals

DarrelFletcher:
How do i determine the mass of a planet when the radius is 3(10^7) and the gravitational field strength is 8g(N kg^1)
 updated one year ago
 7 replies
 2 Medals

woleraymond:
A stone thrown from ground level returns to the same level 4 s after. With what speed was the stone thrown? Take g=10ms^2
 updated one year ago
 8 replies
 No Medals Yet

woleraymond:
A 10g bullet of unknown speed is shot horizontally into a 2kg block of wood suspended from the ceiling by a cord. The bullet hits the bloc…
 updated one year ago
 24 replies
 3 Medals
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