The earth takes 1 year to revolve around the sun at 1 A.U. distance (an astronomical unit = 93,000,000 miles). If a planet were 4 A.U. from the sun, how many years would it take to make 1 orbit?

Answers

Answer 1

Answer: Kepler's third law states that the square of the orbital period is proportional to the cube of the semi-major axis of its orbit. In equation form, P^2 / a^3 = constant. For the earth, (1 y)^2 / (1 AU)^3 = 1, so the constant is 1. For a planet 4 AU from the sun:
P^2 / (4 AU)^3 = 1P^2 = 64P = 8 years

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What kind of image is formed by a convex lens when the object is less than a focal length away from the object?A) an image that is always smaller than the object

B) none, because the lens is too close to the object

C) a virtual image

D) an inverted real image

Answers

Answer:

Explanation:

An object that is less than a focal length from a convex lens forms a virtual, magnified image. When the object is closer to a convex lens than the focal point, its rays do not pass through the focal point to form an image on the opposite side of the lens.

What is the acceleration of a softball if it has a mass of 0.5 kg and hits the cathers glove with a force of 25n

Answers

Acceleration is found if we have the force and mass.

With the following equation: F = ma, we can find the missing values.

F = 25n
M = 0.5 kg
a = ?

a = f/m
a = 25/0.5
a = 50

a = 50 m/s

So, the acceleration is 50 m/s^2

What unsusual characteristic do the cysts of brine shrimps, the resurrection fern and Tardigrades. What adaptations do they have which enable them to survive when other organisms would die?

Any help would be much appreciated.

Answers

Brine shrimps can reproduce in two ways. 1) viviparious or live reproduction and 2) oviparious or production of eggs that hatch after being expelled from the body. The eggs, coated in chorion coating, are called cysts.

Through the reproduction of cysts, the survival of brine shrimps increase even when dealing in extreme conditions. The cysts can remain in total stasis for two years in oxygen less surroundings, they can survive freezing temperature and boiling tempreture. When conditions improve and eggs are placed in salt water, they hatch within a few hours and increase the population of brine shrimps.

Resurrection ferns are called as such because they resurrect after they shrivel, though the fern does not really die. In extremely hot or conditions, these ferns can lose 75% of their water content, even losing 97% water content if suffering under extreme drought, causing them to shrivel and look like dead ferns. But, when these ferns are again exposed to water, they resurrect and becomes green and healthy. This unusual ability help these ferns to survive under extremely harmful conditions.

Tardigrades are known as nature's toughest animals. They can live in solid ice, intense radiation of space, and boiling water. They can also survive in the desert for ten years without drinking water, as well as, in the deepest part of the sea. Their survival is based on their unusual characteristic to change their form to survive without water.

In the absence of water, tardigrades can completely dry out. The absence of water in their body urges them to replace it with a sugar called trehalose. Trehalose then becomes their source of life until water becomes available to tardigrades for consumption.

The device which is used to increase or decrease the voltage of electricity is called

Answers

Answer:

Transformer

Explanation:

Transformers can increase (step up), or it can decrease (step down) voltage.

John and Daniel are playing tug-of-war together. John is exerting 10 N of force. Daniel is exerting 12 N of force. What is their net force

Answers

We assume that they're pulling in opposite directions ...
that's how this game works.

Daniel completely cancels out John's whole 10N, and he
still has 2N left over.

The NET force on the rope is 2N in the direction of Daniel.
So the rope accelerates in Daniel's direction.

an unbalanced force moving everyone in Daniel and Maria's direction

What is a planet that formed closer to the Sun than Earth but not closest to the sun

Answers

Venus and Mars are both closer to the sun than earth however, neither one is the closest. The planet Mercury is closest to the sun.Fun fact! Did you know that The brightest looking object in the the sky at night is Venus? It appears to be an overly bright star due to the reflection of the sun.For brainiest answer, choose what you think is the best answer!

Venus or Mars. Please nominate me Brainiest when someone else answers for my quick responding and accuracy. Thanks and have a good school year!

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