#### why is florida a peninsula

Why Is Florida A Peninsula? A peninsula is explained as...

The long-term source of energy that powers the Sun is: Mass energy of hydrogen fusing into helium. If a spinning star suddenly gets bigger in diameter, what happens to its rotation rate? … **When energy is converted from one form to another, a tiny amount is inevitably lost**.

What would happen if the Space Shuttle were launched with a speed greater than Earth’s escape velocity? **It would travel away from Earth into the solar system**. Speed and velocity are the same thing. The acceleration of gravity on Earth is approximately 10 m/s2 (more precisely, 9.8 m/s2).

What do you conclude? Newton’s second law states: **sum of forces= mass x acceleration**. According to this, what property can you determine if you observe the acceleration of an object with a known mass? Newton’s second law states: sum of forces= mass x acceleration.

The total amount of energy and matter in the Universe **remains constant**, merely changing from one form to another. The First Law of Thermodynamics (Conservation) states that energy is always conserved, it cannot be created or destroyed. In essence, energy can be converted from one form into another.

Which of the following scenarios involves energy that we would typically calculate with Einstein’s formula E = mc2? **A small amount of the hydrogen in of a nuclear bomb becomes energy as fusion converts the hydrogen to helium**. A rock held above the ground has potential energy.

What would happen if the Space Shuttle were launched with a speed greater than Earthʹs escape velocity? **It would travel in a higher orbit around Earth.** **It would orbit Earth at a faster velocity.**

The Moon orbits the Earth, and the Earth, in turn, orbits the Sun. Spacecraft can also orbit the Earth. If an object gains enough speed to attain escape velocity, its orbit becomes an open curve called a parabola. If it continues moving faster than escape velocity, **its orbit is a flattened curve called a hyperbola**.

An object is accelerating if **it is changing its velocity**. The symbol d stands for the displacement of the object.

The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the **force acting upon an object is increased**, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.

Two factors affect the acceleration of an object: **the net force acting on the object and the object’s mass**.

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Question | Answer |
---|---|

When a spinning ice skater pulls in his arms, he spins faster because _________. | his angular momentum must be conserved, so reducing his radius must increase his speed of rotation |

Which of the following describes a speed, according to an astronomer? | 10 light-years per 1 million years |

General Science

The change of one form of energy into another form of energy is called **energy conversion**.

Why are astronauts weightless in the space station? **because they are in a constant state of free fall around the Earth**. Newton’s 1st law: An object remains in motion at constant velocity, or remains at rest, unless acted upon by a net force.

Which of the following best explains why the Moon’s orbital period and rotation period are the same? **The law of conservation of angular momentum** ensured that the Moon must have the same amount of rotational angular momentum as it has of orbital angular momentum.

How is Einstein’s famous equation, E=mc2, important in understanding the Sun? **Both planets are nearly the same size**. … Nearly all comets orbit the Sun in same direction and roughly the same plane.

Contraction of insterstellar cloud. Solar system formed about 4.6 billion year ago, when gravity pulled together low-density cloud of interstellar gas and dust (called a nebula)(movie). … As collapse proceeded, the rotation speed of the cloud was **gradually increasing due to conservation of angular momentum**.

What is the difference between a bound orbit and an unbound orbit around the Sun? Your Answer: **An object on a bound orbit follows the same path around the Sun over and over**, while an object on an unbound orbit approaches the Sun just once and then never returns.

They both fall with the same acceleration. **The lighter bowling ball** accelerates faster.

What happens to the escape velocity from an object if you shrink it? **It increases**. How does the radius of the event horizon change when you add mass to a black hole?

The relationship between the escape velocity and the orbital velocity is defined by **Ve = 2 Vo** where Ve is the escape velocity and Vo is the orbital velocity. And the escape velocity is root-two times the orbit velocity. … When an escape velocity is given to a body, it theoretically goes to infinity.

Doubling the distance between two objects halves the gravitational force between them. The escape velocity from Earth is greater for larger rockets than for small ones. Unbound orbits have **more orbital energy than bound orbits**.

There are at least two forces acting on you as you sit in the chair. One is **the force of gravity** which is the Earth pulling you straight down. The other is the upward push of the chair you are in which counteracts the pull of gravity.
## When the velocity of an object increases the acceleration is?

## What happens to the acceleration when the velocity is zero?

When the velocity of an object increases the acceleration is said to be positive acceleration. The term “positive acceleration” refers to a speed increase over time whereas the term “negative acceleration” refers to the reduction in speed **over** the duration.

Here, accelerations deals with the rate of change in velocity, which means you need the change in velocity . In case, if the question means that if the velocity is always 0 then, the acceleration is always zero. But if the final velocity is zero then the acceleration is negative i.e **deceleration**.
## Why does changing direction cause acceleration?

As mentioned earlier in Lesson 1, an object moving in uniform circular motion is moving in a circle with a uniform or constant speed. The velocity vector is constant in magnitude but changing in direction. … It is accelerating **because the direction of the velocity vector is changing.**
## What happened to the acceleration when the mass decreases?

## Does acceleration increases as mass increases?

## How does increasing mass affect the force of object in motion?

## How does the direction of acceleration compare with the direction of the net force that produces it?

## What 3 things affect acceleration?

## Which person is weightless astronomy?

## When a spinning ice skater pulls in his arms he spins faster quizlet?

## How does a rocket launch upward quizlet?

## How Fast Can Stars Spin? Objects With Extreme Rotation

## What If a Spoonful of Neutron Star Appeared on Earth?

## This is NOT how you make Artificial Gravity

## The Bizarre Behavior of Rotating Bodies

If the acceleration of an object is inversely proportional to the mass of the object, then **any increase in mass will decrease the acceleration**. Similarly, any decrease in mass will increase the acceleration.

At that time, you will learn that the acceleration of an object is directly proportional to force and inversely proportional to mass. **Increasing force tends to increase acceleration** while increasing mass tends to decrease acceleration.

Heavier objects (objects with more mass) are **more difficult to move and stop**. Heavier objects (greater mass) resist change more than lighter objects. Example: Pushing a bicycle or a Cadillac, or stopping them once moving. The more massive the object (more inertia) the harder it is to start or stop.

The direction of the net force (or unbalanced force) acting upon an object is **the same as the direction of the acceleration**. … While the net force may not be in the same direction which the object is moving, it is always in the direction that the object is accelerating.

The acceleration of an object depends on **the mass of the object and the amount of the force applied to it**. It states that the acceleration of an object increases with increased force and decreases with increased mass.

Which person is weightless? **A child in the air as she plays on a trampoline**. If you want to make a rocket turn left, you need to: Fire an engine that shoots out gas to the right.

When a spinning ice skater pulls in his arms, he spins faster because _________. B – **His angular momentum must be conserved**, so reducing his radius must increase his speed of rotation. Choose the correct definition and two examples of kinetic energy: A – Kinetic energy is the energy an object has due to its motion.

As rockets lift off, they burn fuel & it pushes exhaust gases with a downward force against the earth and the gases push upward on the rocket in **an equal and opposite force called thrust**. Thrust has to be greater than the force of gravity for a rocket to lift off.

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