Ph.2.01
Yaseen was exploring space for some time, he found a planet with huge gravitation that he couldn't escape its gravity, and orbited it at distance of 4,000km from its center, find the planet's mass knowing that Yaseen's speed was tenth the speed of light.
5.38x1031
a mole of electrons is put in an electric field of 100V/m at a distance 10cm from the center of the field, find the electric potential energy held by the electrons
965KJ
Find the power of the circuit if its resistance is 20ohm, and the voltage is 20V
20Watts
Four ideal ammeters are used to measure the currents as shown in the diagram below. The readings for ammeters
2A
After searching the school part by part, Yaseen finally found the tressure. he found the x mark on the ground, but he needs to dig deep and deep. He does not know how deep he need to dig; however, He found a clue stating two things:
1. the earth's density is 5,515 kg/m³
2. He will find the tressure when he feels weighting half of his weight
Help Yaseen knowing how deep he will dig to find the tressure
M_e = 5.972×10^24 kg
R_e = 6,378 km
3177.5km
An electron gun is firing electrons at speed equal to half the speed of light. Find the electric field in the gun if you know that the gun nozzle is 10m
25.5K
Find the current density of a wire, if the power of current is 25Watt, the resistivity is 1 ohm, and its area is 1m2
5A/m2
Find the equivalent resistance
0.62
Find the position of La grange point 1 from earth
1. mass of sun = 1.989x10^30kg
2. mass of earth = 5.972x10^24kg
3. distance between earth and sun = 148 x10^6km
256007m
In a hydrogen atom, a proton is fixed at a point and an electron orbits it in a distance of 0.529×10^−10, the average distance between proton and electron in a hydrogen atom. What is the potential energy of the orbit?
4.36x10^-18
Find the resistivity of a material if it transfers 2A of current when a voltage of 20V is applied in a wire of radius 5cm, and of length 5m
0.015707
find the reading of the ammeter
1.2A
Consider two nearly spherical Soyuz payload vehicles, in orbit about Earth, each with mass 9000 kg and diameter 4.0 m. They are initially at rest relative to each other, 10.0 m from center to center. Determine the gravitational force between them and estimate how long it takes for them to drift together.
4.6 hours
Find the conductivity of a wire, if it can accelerate an electron from rest to the speed of light in just 1 second.
knowing that its current density is 1A/m2
q_e = -1.6× 10^-19C
m_e = 9.1× 10^−31 kg
0.0017
Find the equivalent resistance
0.033
Do you Believe Earth is round or flat? for me I believe Earth is linear. now imagine with me a linear earth—well liked. Yaseen was setting on the surface of the earth, however the rest of the class bulled him of weighing 784N, so he decided to go dig down in the surface of the earth, so they stop bullying him, he decided to dig down till his weight is reduced to its half. tell Yaseen how deep he needs to dig to achieve this.
(assume Earth has uniform density)
0.56155L
During the last ECPC, Yaseen solved 5 questions, so he got 5 balloons, and he was very happy. Unfortunately, nothing stays good till the end, one of the ballons escaped Yaseen's Hand and hit the ceiling, he desperately tried to catch it but it escaped in 1s, however, Yaseen didn't agree to leave it and go—It represented to him his effort. so he started to rub the other ballons together to charge two of them, then he let one of them to go up nearby the ballon at the ceiling to partially charge it, and then he let the other one to escalate until it reaches a distance of 1cm from the other ballon—and kept the distance constant, and started to pull it down with an acceleration *a* until he could grab the other balloon (the balloon will move a distance of 3m) find the magnitude of the charge that Yaseen has charged the ballons with, knowing that he could grab the ballon in 2s, the ballon's total mass is 10g.
2.88x10^8C