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Q. A small piece of dust of mass m = 1.50g travels horizontally through an electric air cleaner in which the electric field is 498N/C. The electric force on the particle is equal to weight of the particle.
What is the charge on dust particle?
Q. An arrow is shot at 39 angles with the horizontal. It has a velocity of 52.0 m/s. The acceleration of gravity is 9.80 m/s2.How high will the arrow go?
A converging lens has a focal length of f = 29 cm. If an object is placed 40 cm from the lens, where will the image be formed.
A rocket is launched at an angle of 59° above the horizontal with an initial speed of 97 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 28m/s2.
The parallel metal plate of a capacitor is detached by a distance of 0.5cm and is connected to a 90v battery. Find the electric field between them and surface charge density on the plate.
When light with a wavelength of 206 nm is incident on a certain metal surface, electrons are ejected with a maximum kinetic energy of 2.57 x 10-19 J. find the wavelength (in nm) of light that should be used to double the maximum kinetic energy of ..
And if the plane could fly without this pilot, how much force would the plane require to maintain the equal acceleration?
What is the magnitude of the normal force. What is the total translational kinetic energy of gas molecules.
A child loses his balloon, which rises slowly into the sky. If the balloon is 23 cm in diameter as the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension could be neglec..
Two cicadas, Chirpy and Milada, jump from the top of a vertical cliff. Chirpy just drops and reaches the ground in 3.10 , while Milada jumps horizontally with an initial speed of 98.
An object has a kinetic energy of 303 J and the momentum of magnitude 22.9 kg·m/s. Find the speed and the mass of the object.
A ball of mass m makes a head-on-elastic collision with a second ball (at rest) and rebounds with a speed equal to one-fourth its original speed. What is the mass of the second ball.
The electric field in a region of space is oriented along the positive y axis. A circle of radius R is placed in xz-plane. The flux of the electric field by this circle is Φ. The same electric field passing through a second circle of radius 2R parall..
How long can craft hover over the moon surface Contract between Einstein's calculations and observed precession
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