Please help these with these two questions

How would the gravitational force between Earth and the Moon change if the distance between the two objects doubled, but all other factors stayed the same?
Group of answer choices

The gravitational force between Earth and the Moon would remain constant.

The gravitational force between Earth and the Moon would completely disappear.

The gravitational force between Earth and the Moon would decrease by a proportional amount.

The gravitational force between Earth and the Moon would increase by a proportional amount.

Paul sprinkles iron filings onto a piece of paper near a bar magnet. The iron filings quickly become arranged in a pattern all around the bar magnet. Which argument does this evidence BEST support?
Group of answer choices

Larger magnets can attract more objects.

A magnet can attract magnetic objects through various materials.

Only objects that are made of metal have a magnetic field.

Magnetic fields exist between objects that are not in contact with each other.

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

What elements are found in the inner and out core of the earth? the correct layers of earth's interior from the top to the center? what is the unwanted material that is removed from a mine called? how much stronger is an earthquake that registers 5 on the richter as opposed to 2? what occurs at a convergence plate boundary? the majority of the the earth's rock what is the most common element found in the earth's crust? what element is found in pyrite that contributes to acid mine drainage? why must mining companies post bond prior to permitting? how are bacteria being used in treating effluent from mines? what is a problem of acid mine drainage in rivers and soils? what do tectonic plates move on? why is gold smelting so damaging? how are artesian wells formed? where is dammed water colder than the river it flows into? what is one of the problems of uncontained aqueducts? what is the largest use of industrial water? underground sand and gravel formations that can store water? what type of water test measure acidity? which type of water test for cloudiness from suspended solids? what water test measures the amount of calcium and magnesium? these are all problems of coal power plants all of the following are advantages of riparian lands along rivers what type of water would be the warmest and have the least amount of dissolved oxygen? the zone of aeration is

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd a) 30 joules b) 3000 joules c) 320 joules d) 3200 joules