DE_Phys_Unit3 cloned 3/15/2023 Mess Up (includes Unit 2 material) - Nicholas Meyer | Library

Instructions

This Formative will cover Unit 3.2-3.5

1

Energy is defined as the ability to do _______ .

1

What element is the video referring to?

1

Why can't we 'harvest' (that is to say, why can't we get) hydrogen from the atmosphere (air)?

1

Instead of getting hydrogen from air, we can get it from water by splitting hydrogen from oxygen...but there's one problem...what is that problem?

1

What is the solution the speaker is suggesting for producing hydrogen with the least amount of energy?

4

Energy __________ be made from nothing. We have to convert it from other forms to make electricity. Many power plants rely on fossil fuels which are a __________source of energy. The energy in fossil fuels such as oil and coal is a form of __________energy. Once we run out of fossil fuels, we will have to rely on alternative energy sources, such as wind and solar which __________sustainable.

1

According to the video, the type of energy possesed by an object or a system due to the constant movement of particles within the object or the system is a type of kinetic energy called _______ .
Watch the video in Discovery Education, under the Engage tab.

5

Most of the energy on Earth originally came from the _______ . Due to _______ reactions taking place inside the sun, energy in the form of _______ is released. Upon entering our atmosphere, this energy is converted into _______ energy. Earth does have its own source of energy as well due to _______ decay deep inside the core, which is released at volcanoes and hot springs.

1

According to this picture, the bowling ball is __________energy and the pins are __________energy.

1

What does the law of conservation of energy state?

1

Stored energy is also known what kind of energy?

1

Energy of motion is also referred to as what type of energy?

2

In 1780, Charles Coulomb determined that the strength between two charges depended on the amount of _______ on the two objects and the _______ between them.

3

Which of the following relates to Coulombs law?

1

According to Coulomb's law, the force between two charged objects __________as the charge of either object increases.

1

According to Coulomb's law, the force between two objects __________ as the distance between the objects increases.

2

Two copper spheres are currently 1.2 meters apart. One sphere has a charge of +2.2 × 10-4 C and the other has a charge of –8.9 × 10-4 C. What is the force between the charged spheres? Is the force attractive or repulsive?

2

Two metal rods in a factory are oppositely charged and placed 8.9 cm apart. One rod has a charge of 7.5x10-7 C and the other has a charge of -5.1x10-5 C. What is the force between the rods. Is it an attractive or repulsive force?

2

Two charged objects in a laboratory are brought to 0.22 meters away from each other. If the force between the spheres is 4,550 N and the charge on one object is 9.9 x 10-5 C, what is the charge on the other object?

1

What is the force between two protons that are separated by 1.0 mm? The charge of a proton is 1.6x10-19 C.

3

The gravitational force is an interaction between any two objects in the universe that have _______ . The _______ of the force of gravity between Earth and the moon is large, because the masses of the two objects are _______ .

1

If there is a force of gravity between all objects that have mass, why don't two people standing near each other not get pulled together from gravity?

1

The force of gravity is calculated by finding the __________ between G, m1 and m2.

2

The force of gravity is __________to the masses of two objects and __________to the distance between the objects.

1

Who discovered the law of universal gravitation?

1

The constant 'G', also known as the_______ , is equal to 6.67x10-11Nm2/kg2

2

If you had two objects and you doubled the mass of object one, then the force between them would__________. If you didn't change the mass but rather, decreased the distance between them by 1/2, then the force between them would __________.
Refer to this video in explore 2

1

A 485 kg sphere sits at 14.0 km due north of an 852 kg sphere. What is the force of gravity on the first sphere due to the second sphere? Compare this to the force of gravity on the second sphere due to the first sphere. (Show your work using the math symbol on the left toolbar)

1

If you recall, for calculating the force of gravity for objects near earth's surface, you can use Newton's 2nd Law of Motion. Knowing that as well as acceleration due to gravity (previously provided in your notes as well), what would be the Fg of a watermelon that had a mass of 3kg?
Refer to the above video if you need assistance

1

Draw the force diagram, as it relates to gravity, for the objects (use the drawing tools)

1

What is the distance between two objects if one (a 185,000 kg object) experiences a gravitational force of 0.00200 N due to a 225,000 kg object.

1

What is the acceleration due to gravity felt by the International Space Station? The ISS has a mass of 4.5 × 105 kg and is in an orbit of about 380 km. Earth has a mass of 6.0 × 1024 kg and a radius of 6,400 km. (Assume G=6.67×10−11N⋅m3⋅kg−1⋅s−2)

1

A 3.0 kg object sits at 2.0 m west of a 5.0 kg object. A 2.0 kg object sits at 2.5 m east of the 5.0 kg object. Find the center of mass of this system.

1

A spacecraft orbiting a planet at an altitude of 120 Km releases a satellite that falls toward the surface. The planet has a mass of 5.2 x 1023kg and a radius of 2800 km. What is the acceleration of the satellite?

1

What can you say about the gravitational force of the sun and the force of acceleration of the orbiting planets...why don't planets fly off into the universe and why don't they crash into the sun?