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1. Expalin why ionic compound are formed when a metal from the left side of the periodic table reacts with a nonmetal from the right side. Give two examples of such compound.
2. Explain why covalent bonds are formed when nonmetal from the right side of the periodic table bond with each other. Give two examples of such compound.
A compound microscope has a barrel whose length is 18.3 cm and an eyepiece whose focal length is 1.2 cm. What focal length must the objective have so the angular magnification of the microscope is -270
A container of cross-sectional area 102 cm2 contains liquid of density 1.95 g/cm3 to a height of 6.60 cm above a small hole of area 1.00 cm2 in the side. Find the flow rate through the hole
What is the total charge of the radon nucleus? (The neutral radon atom has 86electrons.) What is the magnitude of the forceon an electron at a distance of 2.36 Angstrom from the radonnucleus?
A 168N sign is supported from its top surface by two ropes that each make a 22.5o angle with the horizontal. The sign is not moving. How much force is in each rope
The 4{rm kg} block in the figure is attached to a vertical rod by means of two strings. When the system rotates about the axis of the rod, the strings are extended and the tension in the upper string is 83N.
Two identical traveling waves, moving in the same direction, are out of phase by ?/4.0 rad. What is the amplitude of the resultant wave in terms of the common amplitude ym of the two combining waves
A toy cannon uses a spring to project a 5.31-g soft rubber ball. The spring is originally compressed by 5.04 cm and has a force constant of 7.96 N/m. At what point does the ball have maximum speed
A 1400kg sedan goes through a wide intersection traveling from north to south when it is hit by a 2400kg SUV traveling from east to west. How fast was sedan traveling just before the collision
An aluminum cylinder with radius 1.7 cm and length 17 cm is heated to 340 °C. Find the net power this cylinder radiates into a room at 24 °C
Two coils are close to each other. The first coil carries a current given by I(t) = 4.70 e%u22120.025 0tsin(120%u03C0t), What is the mutual inductance of the coils
A woman who is late in her pregnancy often leans backwards slightly when getting out of chairs and even while walking. Why is the backpack helpful
The magnetic flux through one turn of a 54-turn coil of wire is reduced from 40.3 Wb to 5.6 Wb in 0.10 s. Find the total resistance of the wire
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