According to the Big Bang Theory, we believe that the universe, psychology homework help

User Generated

orengohqnx

Science

Description

QUESTION 1

  1. Levers have only one class.

2 points

QUESTION 2

  1. A lever is a bar that can pivot on a fixed point.

2 points

QUESTION 3

  1. A see-saw is an example of a first class lever.

2 points

QUESTION 4

  1. If the resistance force is 40 Newtons and the effort force is 20 Newtons, what is the mechanical advantage?

3 points

QUESTION 5

  1. What do you need to calculate the mechanical advantage of a block and tackle?

3 points

QUESTION 6

  1. A playground slide is an example of which simple machine?

3 points

QUESTION 7

  1. Which of the following is an example of a wheel and axle?

3 points

QUESTION 8

  1. The lid on a jar is an example of which simple machine?

3 points

QUESTION 9

  1. When movers use ramps to move heavy objects, which of the following are they doing in order to make work easier?

3 points

QUESTION 10

  1. When you decrease the length of the effort arm on a lever which of the following happens to effort force?

3 points

Click Save and Submit to save and submit. Click Save All Answers to save all answers.


QUESTION 1

  1. Which subatomic particle has a positive charge?

3 points

QUESTION 2

  1. If an atom has 3 protons, 3 neutrons, and 2 electrons, what is the electrical charge of the atom?

3 points

QUESTION 3

  1. What happens when you shuffle across a carpeted floor?

3 points

QUESTION 4

  1. Which of the following describes the charge of an atom before any electrons are transferred?

3 points

QUESTION 5

  1. Which law has a mathematical relationship that is dependent upon the charges of the particles involved and the distance between those charges?

3 points

QUESTION 6

  1. Which of the following is a material that does not allow electrons to move easily through it?

3 points

QUESTION 7

  1. Which of the following is a good insulator?

3 points

QUESTION 8

  1. Lightning rods are used on houses because they allow the lightening to go to the ground instead of into the house. This means that lightning rods are ________________.

3 points

QUESTION 9

  1. Which of the following is the way that static electricity is transferred?

3 points

QUESTION 10

  1. Wire is used to attach a battery to a penny and is then used to light a small light bulb. The light bulb is lit due to which of the following?

3 points

Click Save and Submit to save and submit. Click Save All Answers to save all answers.


QUESTION 1

  1. Use the diagram to answer the following question.To determine the frequency of the wave, take _______________ and determine how many times it repeats over a certain amount of time.
    graph

3 points

QUESTION 2

  1. Use the diagram to answer the following question.How can you calculate the amplitude of the wave in the diagram?
    graph

3 points

QUESTION 3

  1. The distance between crests on a wave is the

3 points

QUESTION 4

  1. The energy of a wave is calculated by squaring the frequency of the wave.

2 points

QUESTION 5

  1. To calculate the wave speed of a wave, square the amplitude of the wave.

2 points

QUESTION 6

  1. What is the period of vibration for a wave with a frequency of 50 hertz?

3 points

QUESTION 7

  1. If a wave has amplitude of 2 meters, a wavelength of 2 meters, and a frequency of 10 Hz, and a period of 1 second, then at what speed is the wave moving?

3 points

QUESTION 8

  1. _______________ waves move perpendicular to their energy transport, while ____________ waves move parallel to their energy transport.

3 points

QUESTION 9

  1. In which type of wave does the medium move parallel to the direction of the energy transport?

3 points

QUESTION 10

  1. A sound wave is an example of an electromagnetic wave in nature.

2 points

Click Save and Submit to save and submit. Click Save All Answers to save all answers.


QUESTION 1

  1. Which of the following is an example of a physical change to matter?

3 points

QUESTION 2

  1. In which of the following does a chemical change take place?

3 points

QUESTION 3

  1. When a physical change occurs, one or more substances (reactants) break down or combine to form new substances (products).

2 points

QUESTION 4

  1. Photosynthesis is a chemical reaction that involves the production of glucose (sugar) from carbon dioxide and water in the presence of sunlight. Photosynthesis is what kind of reaction?

3 points

QUESTION 5

  1. When you add calcium chloride to water in a Ziploc baggie, the baggie gets hot and explodes; this means that the reaction is exothermic.

2 points

QUESTION 6

  1. The equation NaCl →Na +Cl is a ______ reaction.

3 points

QUESTION 7

  1. In a ________ reaction, a single uncombined element replaces another element in a compound.

3 points

QUESTION 8

  1. Barium replaces calcium in the following reaction: Ba + CaCO3 → BaCO3 +Ca. What type of reaction does this represent?

3 points

QUESTION 9

  1. The following reaction is a single displacement reaction: CuO + H2 → Cu + H2O.

2 points

QUESTION 10

  1. The following reaction is a single displacement reaction: Fe + O2 → FeO2.

2 points

Click Save and Submit to save and submit. Click Save All Answers to save all answers.


QUESTION 1

  1. Newton's work on gravity supported the heliocentric view of the universe.

2 points

QUESTION 2

  1. It wasn’t until the 16th century that people believed that the planets revolved around the sun in a solar system.

2 points

QUESTION 3

  1. How do we know that dark matter exists?

3 points

QUESTION 4

  1. How much of the universe is believed to consist of ordinary atoms that can be detected?

3 points

QUESTION 5

  1. According to the Big Bang Theory, we believe that the universe is _______.

3 points

QUESTION 6

  1. The Big Bang Theory is supported by evidence that space is expanding between galaxies and by radiation that is coming from all directions.

2 points

QUESTION 7

  1. A black hole exerts a tremendous amount of which of the following?

3 points

QUESTION 8

  1. Star formation occurs in the arms of a ___________ galaxy.

3 points

QUESTION 9

  1. A ___________ is a collection of dust and gas held together by gravity.

3 points

QUESTION 10

  1. Our sun is just one of billions of stars in our Milky Way galaxy.

2 points

Click Save and Submit to save and submit. Click Save All Answers to save all answers.

User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

Explanation & Answer

QUESTION 1 Levers have only one class. FalseQUESTION 2 A lever is a bar that can pivot on a fixed point. True QUESTION 3 A see-saw is an example of a first class lever. True QUESTION 4 If the ...


Anonymous
Just what I was looking for! Super helpful.

Studypool
4.7
Trustpilot
4.5
Sitejabber
4.4

Related Tags