11. (a) Three resistors 2 , 4 and 5 are combined in parallel. What is the total resistance of the combination? (b) If the combination is connected to a battery of emf 20 V and negligible internal resistance, determine the current through each resistor, and the total current drawn from the battery. Show the circuit

i need (c) and (d)

2. For a satellite in a circular orbit around the earth, the gravitational force from the earth on the satellite causes the centripetal acceleration. The amount of work done by the gravitational force from the earth on the satelliteA) is zeroB) is greater than zero.C) is less than zero.D) would be different if the masses of the earth and satellite were different.E) can’t be determined without a calculator and some data.i. Prove your answer by using the formula for work, W: (Hint: Consider just a short segment of the orbit, rather than the full revolution.) ii. Prove your answer by talking about the satellite’s kinetic energy, ∆?� ***also please do it i,ii and write a process detail.

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2. For a satellite in a circular orbit around the earth, the gravitational force from the earth on the satellite causes the centripetal acceleration. The amount of work done by the gravitational force from the earth on the satellite A) is zero B) is greater than zero. C) is less than zero. D) would be different if the masses of the earth and satellite were different. E) can't be determined without a calculator and some data. i. Prove your answer for #2 by using the formula for work, W: (Hint: Consider just a short segment of the orbit, rather than the full orbit. Draw and label on the diagram above to support your work.) ii. Prove your answer for #2 by talking about the satellite's kinetic energy, AKE: (Do not use your work from part i to answer part ii–give a separate proof in part ii.)

1. The Hubble space telescope orbits the Earth at an altitude of approxi- mately 600 kilometers and has a mass of 1.11 × 104 kg. (a) be pulled down to the surface of the Earth. Ignoring all air resistance, determine the speed with which the telescope would impact the Earth. Use mgh as the gravitational potential energy, where m is the mass of the telescope, g = 9.81 m/s? (the acceleration due to gravity at the surface of the Earth), and h is the distance the Hubble space telescope were to come to an abrupt stop it would above the surface of the Earth. (b) gravitational potential energy, Ug = -GmM/r, where G is Newton's gravitational constant, m is the mass of the telescope, M is the mass of the Earth, and r is the distance from the center of the Earth to the Hubble telescope. Repeat the calculation from Part (a) using the actual expression for the