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1. Fair weather atmospheric electricity 100 N/C is acting downward 100 km high in the ionosphere. What is the ionosphere voltage required?
2. An alpha particle (two protons, two neutrons) moves into a stationary gold atom (79 protons, 118 neutrons), passing through the electron region that surrounds the gold nucleus like a shell and headed directly toward the nucleus (Fig. below). The alpha particle slows until it momentarily stops when its center is at radial distance r =9.23 fm from the nuclear center. Then it moves back along its incoming path. What was the kinetic energy Ki of the alpha particle when it was initially far away? Assume that the only force acting between the alpha particle and the gold nucleus is the (electrostatic) Coulomb force and treat each as a single charged particle.
3.Hydrogen sulfide (H 2 S) is a molecule that has a permanent dipole moment with dipole charge
q=|±18𝑒|. The dipole distance of H 2 S molecule is 1.12 pm. What is the dipole moment?
Velocity time graph of a body is as shown in the figure. What can be
the conclusion drawn about the velocity of the body from the graph-
A converging lens has a focal length of 30 cm. A 5 cm tall candle is placed at a distance of 10 cm in front of the lens. Determine the image distance.
An infrared heater has a surface area of 0.06m², and the emissivity of the surface is 0.85. how hot must the surface be for the heater to radiate with a power of 500W
To determine frequency of AC supply by CRO.
if a 2 ton vehicle is traveling at 45 mph and a 32 ton vehicle strikes the smaller vehicle how loud would the crash be to launch the smaller vehicle in a complete circle
A pilot flies his aroplane with a speed of 150 metres per second relative to the air and points due west.A wind is blowing at a speed 20 metres per second at a bearing of 135 degrees. With a help of a vector diagram illustrating the situation, find the resultant velocity of the aroplane with respect to the ground?
An airplane is flying due north at 300 metres per second and a Westley wind of 25 metres per second is blowing it off course.calculate the velocity and directions of the plane relative to the ground?
A man with a mass of 67.0 kg runs up four flights of stairs in 15.0 secs. The
man has gone a vertical distance of 90 cm. Determine the amount of work
done by the man to elevate his body to this height. Assume that his speed
is constant.
A man with a mass of 67.0 kg runs up four flights of stairs in 15.0 secs. The
man has gone a vertical distance of 90 cm. Determine the amount of work
done by the man to elevate his body to this height. Assume that his speed
is constant.
