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Physics

Modesta Steuber

Lvl 10
2021-10-25 18:35:03
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Cards in this guide (26)
What does it take to prove a hypothesis false

It needs one counter example.
Facts.

A straight line on a graph means there is a relationship between the dependent variable and the independent variable

_linear_

When can the equations of kinematics not be used

Equations of kinematics or equations of motion can not be used when the body is not accelerating or is moving with a constant velocity.

A horizontal line on the velocity vs time graph indicates a constant positive acceleration

false

Which of the following is the name of the process scientists use to gain knowledge about the physical world

Scientific Method

During an inquiry activity You can use one or more of your five senses during an inquiry activity to make

observations

Which of the following settings describes a displacement vs time graph that looks like this

Constant velocity

Zero acceleration and/or Moving object

Is the term used to describe the study of motion

kinematics

Select the situation below that would produce an average velocity of zero

A dog running in circles, stopping where it started

Is distance a vector quanity

No. Distance is not a vector quantity. It is a scalar quantity and should not be confused with displacement, which is a vector quantity.

Which of the following is not a key assumption to the scientific method

reliablilty

Distance is the magnitude of average velocity

False. Average speed is.

Average speed is

the distance traveled divided by the time to travel that distance and measured in m/s

Acceleration can be found by computing the slope of

You can find acceleration by calculating the slope of a time vs. velocity graph. Time can be measured in seconds, and velocity in meters per second. The slope, change in y over change in x, would yield the units of m/s2, the units of acceleration.

Which two of the following characteristics must a hypothesis possess in order to be considered to be scientific

A hypothesis must possess capable of being proven false and testable in order to be considered to be scientific.

Given no air resistance all objects near the Earth's surface regardless of size and weight fall with the same acceleration because of gravity

Yes, that's correct.

Shanes mother is training for a marathon On Saturdays she does a 10 mile run in 90 minutes What is her average speed in miles per hour

between 6 and 7 mph

If the acceleration due to gravity is the same for all objects does the mass have any effect the acceleration due to gravity

No. If you assume no air resistance, different objects will receive the same acceleration, regardless of their mass.

No. If you assume no air resistance, different objects will receive the same acceleration, regardless of their mass.

No. If you assume no air resistance, different objects will receive the same acceleration, regardless of their mass.

No. If you assume no air resistance, different objects will receive the same acceleration, regardless of their mass.

The acceleration of gravity means that for each second that passes falling objects move 98 meters

No, that's not correct.

The acceleration of gravity means that for each second that passes, falling objects fall

at a speed that's 9.8 meters per second fasterthan it was one second earlier.

All digits shown on the measuring device plus one estimated digit are consider

significant digits.

for short they are called "sig. figs."

Which of the following is not practical application of gravity

the moon has no gravity because it has no atmosphere

appex

Which one of the following is not a step in the inquiry process Investigate observe classify summarize

classify

What type of description is using numbers to describe kinematic quantities

Quantitative

Blank Is a process prompted by a question.

Giving an answer is likely the process that is prompted by a question.

What is a practical example of gravity acting on a moving object

A car speeds up as a traffic light turns green.

Which of the following can be used to explain a statement in a geometric proof Check all that apply

Corollary.

Theorem.

Definition.

Postulate.

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