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three charges are arranged in a line. The distance between Q1 and Q2 is 0.35 m and the distance between Q2 and Q3 is 0.45 m. What is the net electrostatic force acting on Q3
To validate your performance in doing recreational activity make an assessment of your performance. Write the positive impact in assessing the health related fitness of yourself
Charge is placed on a metallic sphere which is surrounded by air. If the radius of the sphere is 15 cm, how much charge can be placed on the sphere before the air near the sphere suffers electric breakdown? The critical electric field strength that leads to breakdown in air is 3 x 10^6 N/C
Calculate the work done by a force F vector = (x-y) i^ +xy j^
in moving a particle
counterclockwise along the circle x² +y² =4 from the point (2,0) to the point
(0, -2).
Determine the value of the constant a for which the vector field
F vector =(2x²y+ z²) i^ +(xy² -x²z) j^ +(axyz -2x²y²) k^
is solenoidal.
An object is dropped from a helicopter which is moving horizontally at a constant velocity of 45m/s^1 180m above the ground. What is the time taken for the object to reach the ground?
2. A parallel plate capacitor has plates 5cm2 and 0.1mm apart. Find its capacitance (a) in air; (b) with mica of κ=6 between plates. 3. How much energy is stored in a 50pF capacitor when it is charged to a potential difference of 200V?
3. How much energy is stored in a 50pF capacitor when it is charged to a potential difference of 200V?
4. A parallel plate capacitor has a square plate of side 6.0 cm and separated by a
distance of 2 mm. (a) Calculate the capacitance of this capacitor. (b) If a 15 V battery is connected to the capacitor, what is the charge stored in any of the plates?
(The value of 𝜀0 = 8.85 𝑥 10^-¹²𝑁𝑚²/𝐶²)
For very large resistances it is easy to construct R-C circuits that have time constants of several seconds or minutes. How might this fact be used to measure very large resistances, those that are too large to measure by more conventional means?
The direction of current in a battery can be reversed by connecting it to a second battery of greater emf with the positive terminals of the two batteries together. When the direction of current is reversed in a battery, does its emf also reverse? Why or why not?
Hannah with a mass of 56.2 kg) is traveling at a speed of 12.8 m/s at the top of a 19.5-m high roller coaster Loop in a THEME park.
Find the following:
A.Hannah’s kinetic energy at the top of the loop.
B.Hannah’s potential energy at the top of the loop.
C.Assuming negligible losses of energy due to friction and air resistance, determine Hannah’s total
mechanical energy at the bottom of the loop (h=0 m).
D.Determine Hannah’s speed at the bottom of the loop.
