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In a thundercloud, there may be electric charges of 140.0 C near the top of the cloud and 240.0 C near the bottom of the cloud. These charges are separated by 2.00 km. What is the electric force on the top charge?
An archer shoots a 2.0x10^-2 kg arrow at a target with a speed of 50 m/s. When it hits a target, it penetrates to a depth of 8.6x10^-2 m. What was the magnitude of the average force exerted by the target on the arrow?
question1two boys are pulling a car of mass 800 kg along a level surface with a pair of ropes attached horizontally.
The frequency of sound waves in air from a violin string are around 570 Hz. what is the wavelength of the sound waves
A 20cm long hollow tube of inner diameter 2.8nm, outer diameter 3.0mm is connected to a battery. what is the potential drop across the tube
Certain criteria have been met which suggest that an intangible asset has been created. Illustrate w hat amount should be recognized as research and development expense in 2011 using U.S. GAAP?
A hockey puck is hit on a frozen lake and starts moving with aconstant speed of 12 m/s. what is the average value of the coefficient of kineticfriction between the puck and the ice
A certain superconducting magnet in the form of a solenoid of length 0.80 m can generate a magnetic field of 14.0 T in its core, Find the number of turns in the solenoid.
1. the sun radiates energy at a rate of 2.86x1023 kw. each fusion reaction in the core of the sun produces 26.73 mev of
A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.28*10^2 m/s from the top of a cliff 140 m above level ground, What is the initial total mechanical energy of the projectile
An electron accelerated from rest through a voltage of 350V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 28cm, what is the magnitude of magnetic field.
a compass needle free to turn in a horizontal plane is placed at the centre of circular coil of 30 turns and radius 12
In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth, How much work did Arfeuille do on the object
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