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A ladder of uniform density, length 4m and mass 20kg, makes an angle = 65 degrees with the horizontal and its upper end rests against a wall. The two ends of the ladder each of have a coefficient of static friction s = :7 between them and the wall or floor respectively. A man wishes to climb the ladder to a point 3m up the ladder's length. What is the maximum mass that he can have such that the ladder will not slip when he reaches this point?
Illustrate what is the magnitude of the apparent weight of a 78kg astronaut 5200km from the center of the Earth's moon in a space vehicle moving at constant velocity?
q. two spherical conductors are connected by a long conducting wire and a total charge of 20.0 muc is placed on this
Sea Launch mission planners are going to launch their Russian launch vehicle from a Lo = 3 degrees into LEO with an inclination of 34 degrees and the longitude of ascending node of 124 degrees. Current LST at the launch site is 1140.
The resolving power of a microscope depends on the wavelength used. If you wanted to "see" an atom, a wavelength of approximately 1 × 10-11 m would be required.
Jordan is building a compound microscope using an eyepiece with a focal length of 7.50 cm and an objective with a focal length of 1.500 cm. How far apart should Jordan place the lenses
A particle with a mass of 3.8 × 10-20 kg is oscillating with simple harmonic motion with a period of 3.9 × 10-5 s, calculate the maximum displacement of the particle
An electron is suspended at a distance of 1.36 cm above a uniform line of charge. What is the linear charge density of the line of charge
What is the range of frequency of the light emitted by the hydrogen atom
The component prisms are 70-20-90 degrees. the angle between the emerging right and left polarized rays
A 1.0 kohm resistor is connected in series with a 10 mH inductor, a 30 V battery, and an open switch. at time t=0, the switch is suddenly closed. What are the voltage drops Vr and Vl 20.00 us after the switch is closed.
The figures show a hypothetical planetary system at two different times. The spatial coordinates (x, y) of the bodies are given in Astronomical Units (AU). Find the magnitude, dS, of the star\'s displacement
A 2.0cm×2.0cm×7.0cm block floats in water with its long axis vertical. The length of the block above water is 1.0cm. What is the block's mass density
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