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Two very small objects, whose charges are 1 C and -1 C are separated by 1.5 m. What is the magnitude of the electric force that one charge exerts on the other?
a person throws an object upward with an initial velocity of 20 ms. assuming that the object has an initial height of
A 5.29-kg ball hangs from the top of a vertical pole by a 2.09-m-long string. Calculate the angle, between 0° and 90°, that the string makes with the pole
In the treatment of spine injuries, it is often necessary to provide some tension along the spinal column to stretch the backbone. find the tension in each of the cables attached to this neck collar
A wire has a length of 6.63 Ã- 10-2 m and is used to make a circular coil of one turn. compute the maximum torque that this coil can experience
It is fairly easy to strip the two electrons off a helium atom, leaving a bare nucleus of two neutrons and two protons. What is the necessary voltage difference
A nitrogen molecule is confined in a cubic box of volume 1.00 m3. Assuming that the molecule has an energy equal to 3/2kT , what is the value of n=(n_x^2+ n_y^2 +n_z^2)^1/2 for this molecule? What is the energy separation between the levels n and n +..
A soap film (n= 1.33) is contained within a rectangular wire frame. The frame is held veritcally so that the film drains downward and forms a wedge with flat faces. What is the wedge angle of the film
The average speed of blood in the aorta (the main blood vesselcoming from the heart) is 0.300 m/s. The average radius of theaorta is 1.0 cm. The aorta branches into 2×109 capillaries(very small blood vessels) which each have an average radius of 6..
One day, after pulling down your window shade, you notice that sunlight is passing through a pinhole in the shade and making a small patch of light on the far wall. estimate the diameter of the pinhole
A 2.0 wood block is launched up a wooden ramp that is inclined at a 31 angle. The block's initial speed is 5.0 . The coefficient of kinetic friction of wood on wood is muk= 0 .2 part A What vertical height does the block reach above its starting poin..
Two identical positive charges exert a repulsive force of 6.4* 10^-9 N when separated by a distance of 3.8*10^-10 m. find the charge of each.
a ball made of rubber weighing 1kg is thrown at a wall at 6m/s. A ball of putty weighing 1kg is also thrown at the wall at a speed of 6m/s. Which ball transfers the greater momentum to the wall
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