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Q1. A 60 m ladder leans against a wall. What is the minimum force of friction essential to prevent the ladder from sliding? Presume that the force in the wall is negligible.
Q2. Two identical diverging lenses are separated by 12 cm. The focal length of each lens is -7.0 cm. An object is located 5.0 cm to the left of the lens that is on the left. Find out the final image distance relative to the lens on the right.
Q3. Radioactive isotopes frequently occur together in mixtures. Assume a 400g sample contains, with a half-life of 12 days, and, with a half-life of 4.5 days. If there are firstly twice as many calcium atoms as there are barium atoms, what will be the ratio of calcium atoms to barium atoms 3.50 weeks later?
What is constant speed V
A standardized biological microscope has an 8.0--focal-length objective. What focal-length eyepiece should be used to achieve a total magnification of.
Assume that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion all through the 30 days.
What is the magnitude of the force applied throughout this time? What is the direction of the force applied throughout this time?
What is average kinetic energy of each helium atom
Find out the electric field at radius
Determine magnitude of the force
A 1600 kg car starts from rest at A, coasts 180m through a dip and comes to stop at B after coasting a distance d on level ground. If the rolling resistance is a constant force of 280N, conclude the distance d.
The four tires of an automobile are inflated to a gauge pressure of 2.10E+5 Pa. Each tire has an area of 0.0267 m2 in contact with the ground. Find out the weight of the automobile.
How to generate a constant deceleration
A generator uses a coil that has 210 turns and a 0.20-T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. assume that each turn of the coil is a square (an approximation), conclude the length of wire f..
Estimation instantaneous rate of evaporation
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