Physics Answers

A 20 kg crate hangs at the end of a long rope. Find its acceleration when the tension in the rope is (a) 250 N (b) 150 N (c) zero (d) 196 N

A long copper wire with a radius of 2.0 mm carries a uniform linear charge density of λ = 6.2x10-8 C/m. Find the magnitude of the electric field at a distance of 10 cm from the wire.

a)

 The temperature of 200 g of water increases from 20°C to 50°C in 10 minutes. Calculate:

i.

the amount of heat gained by the water.  

ii.

the average rate at which the water is gaining heat.    

             (Specific heat capacity of water = 4200 J kg^{-1 O}C^-1)

b) Determine the amount of heat that must be removed from 1 kg of water at 40°C to convert it to ice at -5°C.

A cube made of an unknown material has a dimension of 6 cm on all edges. If the upper face is displaced laterally by 0.1 mm by a force of 2 x 106 dynes acting parallel to the surface, calculate the shear modulus of the material

two charged particle q1=10uC and q2=20uC are separated by distance r=15cm.what is the magnitude of the electrostatic force with solution.

a force of 500N exist between two identical points charge separate by a distance of 40cm.calculate the magnitude of the two point charge with solution.

the electronic force between two-points charge with a magnitude of-800nC and is 15N.how far apart are the two charges from each other in centimeters? with solution.

1. 2 charged particles reacted with a force of 0.31 N with a distance of 1.5 cm, the 2nd charge contains 54 nC. Find the value of the first charge.

2. Using eq. 2, solve for the Force of 2 charges, q1 = -63 nC and q2 = +42 nC with a distance of 5.5 cm. (Note: ϵ0 has a value of 8.85 x 10⁻¹² F/m) (F= N m/ C²)

3. Find the charge of a test charge with an electric field of 6.0 x 10⁻⁶ N/C and a force of 0.25 N

4. Solve for the Electric field of a point charge q, with a value of 2.9 nC and a distance of of 2.4 m

5. Find the value of the point charge with an electric field of 12 N/C and a distance 3.3 m

Jamylla and Janylla are on a hike. Both hikers begin a trip by walking, the first leg A: 2.65 km, 140° from their base camp, on their second leg B: 4.77 km, 252° and to complete their final leg C: 3.18 km, 332°. What is the magnitude and direction of their final position from their base camp? Apply polygon method and component method and compare their results. (calculus based)

At the center of a sphere of radius 0.5m a point charge of 2μC is placed. What electric flux is passing through the sphere?