The electroscope shown in the diagram below is made completely of metal and consists of a knob, a stem, and leaves. A positively charged rod is brought near the knob of the electroscope and then removed. Knob Knob Rod Stem Leaves The motion of the leaves results from electrons moving from the A) leaves to the knob, only B) knob to the leaves, only C) leaves to the knob and then back to the leaves D) knob to the leaves and then back to the knob 2. An electroscope is a device with a metal knob, a metal, 5. As shown in the diagram below, a charged rod is held stem, and freely hanging metal leaves used to detect charges. The diagram below shows a positively charged leaf electroscope. near, but not touching, a neutral electroscope. KNOB Knob The charge on the knob is A) positive and the leaves are positive B) positive and the leaves are negative C) negative and the leaves are positive D) negative and the leaves are negative Leaves As a positively charged glass rod is brought near the knob of the electroscope, the separation of the electroscope leaves will A) decrease C) remain the same 6. When an object is brought near the knob of a positively charged electroscope, the leaves of the electroscope initially diverge. The charge on the object B) incr ncrease 3. A charged electroscope can detect A) must be zero A) positive charge, only B) negative charge, only C) either positive or negative charge D) neither positive nor negative charge B) must be positive C) must be negative D) cannot be determined 7. A glass rod becomes positively charged when it is nuhbed with silk This net poritiue harg

A = 2 X 1025, B = 4.5 X 10-10, C = 3 X 10-6. AB/C = ?       (2) ACB = ?       (3) The Moon is approximately 400,000 km from the Earth.  An atom of a certain element has a diameter of 4 X 10-8 cm. Given 1 km = 1,000 m and 1 m = 100 cm, about how many atoms of this element can be lined up between Earth and Moon?             (4) A spherical planet has a radius of 2,000 km and a mass of 1025 kg. Calculate its density (mass/volume) in kilograms per cubic meter.           (5) How many of the atoms in Question (3) can fit within a spherical planet with a diameter of 2 X 104 km?           (6) An asteroid’s radius is 200 m and its distance from Earth is 107 km. What angle in degrees (θ) will it subtend? Use the equation  θ = 57 (diameter) / distance

please help with questions 1,2,3,4,5,,6,7,8,9,10 and 11

Determine the Miller indices for the directions A, B, C and D shown in the following cubic unit cell.