### Which Statement Must Be True In Order For A Rocket To Travel From Earth To Another Planet?

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• 19 In order for a rocket to travel from Earth to another planet, it must be launched with enough speed to overcome Earth’s gravity and escape its atmosphere. The rocket must also be traveling in the correct direction relative to the planet’s orbit. If these conditions are met, the rocket will eventually reach the planet.

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#### What would happen if a rocket were launched with a speed greater than Earth’s escape velocity?

If a rocket were launched with a speed greater than Earth’s escape velocity, it would escape from Earth’s gravitational pull and eventually enter orbit around the sun. However, the rocket would eventually slow down due to the friction of the interstellar medium and eventually fall back to Earth.

#### What do we mean by the orbital energy of an orbiting object such as a planet moon or satellite?

The orbital energy of an object is the energy it has due to its motion around another object. For example, the Earth has orbital energy because it orbits the sun. The moon has orbital energy because it orbits the Earth.The orbital energy of an object can be calculated by its mass, its distance from the object it is orbiting, and the speed at which it is orbiting. The higher the mass of the object, the more orbital energy it has. The further the object is from the object it is orbiting, the more orbital energy it has. The faster the object is orbiting, the more orbital energy it has.The orbital energy of an object can be used to calculate its orbital period. The orbital period is the time it takes for the object to complete one orbit around the object it is orbiting. The higher the orbital energy of an object, the shorter its orbital period.The orbital energy of an object can also be used to calculate its escape velocity. The escape velocity is the minimum speed at which an object can break free from the gravitational pull of the object it is orbiting. The higher the orbital energy of an object, the higher its escape velocity.

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#### What is the acceleration of gravity at the surface of Earth quizlet?

The acceleration of gravity at the surface of Earth quizlet is the rate at which an object falls towards the center of the planet. It is affected by the mass of the object and the distance from the center of the planet. The acceleration of gravity is 9.8 m/s2 on Earth.

## Which of the following best describes the origin of ocean tides on Earth?

There are two main theories that explain the origin of ocean tides on Earth. The first theory is that tides are caused by the gravitational pull of the Moon and Sun. The second theory is that tides are caused by the rotation of the Earth. The Moon’s gravitational pull is the most important factor in creating tides. The Sun also has a gravitational pull, but it is weaker than the Moon’s. Tides happen when the water is pulled in different directions by the Moon and the Sun. The Moon’s gravitational pull is stronger than the Sun’s, so the water is pulled more towards the Moon. This causes the water to bulge out on the side of the Earth closest to the Moon. The water also bulges out on the side of the Earth furthest from the Moon, but not as much as on the side closest to the Moon. The rotation of the Earth also plays a role in tides. As the Earth rotates, the water is also rotating. The water closest to the shore is moving slower than the water further out. This causes the water to bulge out at the shore. Both the Moon’s gravitational pull and the rotation of the Earth play a role in the origin of ocean tides on Earth.

## How does a rocket reach escape velocity?

A rocket reaches escape velocity when the force of the rocket’s engines is greater than the force of gravity. The force of gravity is what keeps the rocket attached to the earth. When the force of the rocket’s engines is greater than the force of gravity, the rocket will break free from the earth’s gravitational pull and will be launched into space.

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#### How fast does a rocket travel to leave Earth’s orbit?

1. A rocket’s speed is determined by a number of factors, including its size, weight, and the amount of fuel it is carrying.
2. The speed needed to leave Earth’s orbit is about 28,000 kilometers per hour.
3. This is the speed needed to escape the gravitational pull of the Earth.
4. Rockets are often capable of much higher speeds, but this is the minimum speed required to leave the Earth’s orbit.

### Which statement must be true for a rocket to travel from Earth to another planet quizlet?

A rocket must have enough fuel to travel from Earth to another planet. The fuel must be powerful enough to propel the rocket at a high enough speed to escape Earth’s gravitational pull. The rocket must also be strong enough to withstand the extreme temperatures and pressures of space.

#### How does a rocket launch upwards choose the statement that best describes why a rocket goes up?

A rocket is launched upwards because of the force of the engines. The engines create a force that pushes the rocket upwards. The force of the engines is greater than the force of gravity, so the rocket is able to overcome gravity and launch upwards.

### What will happen to a satellite when it moves in a circular orbit around Earth and maintaining a constant speed?

A satellite in a circular orbit around Earth will maintain a constant speed. The satellite will not experience any forces except for the gravitational force from Earth. The satellite will not change its speed or direction unless a force is applied to it.

### What is true about the acceleration due to gravity?

The acceleration due to gravity is a measure of the force of gravity on an object. It is the force that pulls objects towards the center of the Earth. The acceleration due to gravity is 9.8 m/s2 on Earth. The value of the acceleration due to gravity is different on different planets.

### What is the acceleration of gravity at the surface of Earth?

The acceleration of gravity at the surface of Earth is 9.8 m/s2. This means that, if you were to drop an object from a height of 1 meter, it would take approximately 0.1 seconds for it to reach the ground. The force of gravity is weaker at higher altitudes, so the acceleration of gravity decreases as you move away from the surface of the Earth.

### What is the acceleration of gravity on an object that is at an elevation above the surface that is equal to the radius of the Earth?

The acceleration of gravity on an object that is at an elevation above the surface that is equal to the radius of the Earth is 9.8 m/s2. This is the same as the acceleration of gravity at the Earth’s surface. The acceleration of gravity is caused by the force of gravity, which is exerted by the Earth on the object. The force of gravity is a function of the mass of the object and the distance between the object and the center of the Earth.

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#### Which of the following best describes why we have seasons on Earth?

• There are a few reasons why we have seasons on Earth.
• One reason is because of the Earth’s tilt on its axis.
• The Earth is tilted at an angle of about 23.
• 5 degrees.
• This tilt causes the Earth to receive more direct sunlight during the summer months, when the Northern Hemisphere is tilted towards the sun.
• The tilt also causes the Earth to receive less direct sunlight during the winter months, when the Northern Hemisphere is tilted away from the sun.
• Another reason we have seasons on Earth is because of the Earth’s orbit around the sun.
• The Earth’s orbit is not perfectly circular, but is instead elliptical.
• This means that the Earth is closer to the sun during part of its orbit, and further away from the sun during another part of its orbit.
• The Earth is closest to the sun during the winter months in the Northern Hemisphere, and furthest from the sun during the summer months in the Northern Hemisphere.
• This difference in distance from the sun affects the amount of sunlight the Earth receives, and thus affects the seasons.
• Finally, the Earth’s atmosphere also affects the seasons.
• The atmosphere filters out some of the sun’s rays, making the Earth’s surface cooler than it would be without an atmosphere.
• The atmosphere also traps some of the sun’s heat, making the Earth’s surface warmer than it would be without an atmosphere.
• The atmosphere’s filtering and trapping of the sun’s rays affects the amount of sunlight the Earth receives, and thus affects the seasons.

#### Which of the following examples describes a situation where a car is experiencing a net force?

• A car is experiencing a net force when the forces acting on it are not balanced.
• For example, if the car is accelerating, there is a force pushing it forwards, and this is greater than the force of friction acting against it.
• The net force is the difference between these two forces.