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Anit [1.1K]
3 years ago
15

True or false:

Physics
1 answer:
deff fn [24]3 years ago
4 0

==> True or false: God created the earth for men to prosper and for people to become part of him.. and to create animals who were to become teachers and to help other animals prosper.

The truth or untruth of this statement cannot be scientifically determined in any reliable way, so it remains a matter of individual faith/belief.   Some people believe that the statement is true; the others believe that it is false.  Those people who believe in the truth of the Bible believe that the statement is true, since it is derived from many Bible verses.

No person can say with certainty that any other person is right or wrong.

==> Describe the difference between a graph made by walking away slowly and a graph made by one walking away quickly.

On a distance/time graph, both lines slope UP from left to right. The line that represents quick walking has a greater slope than the line that represents slow walking.  

On a speed/time graph, both lines are horizontal (zero slope). The line that represents quick walking is higher (farther above the x-axis) than the line that represents slow walking.  

==> Describe the difference between a graph made by walking toward and one walking away from the motion detector.

On a distance/time graph, the line that represents walking toward the detector slopes DOWN from left to right, because the distance from the detector DEcreases as time goes on. The line that represents walking away slopes UP from left to right, because the distance from the detector INcreases as time goes on.  

==> What is the general difference between motions that result in a straight-line position vs time graph and those that result in a curved-line position vs time graph ?

A straight-line position/time graph shows that the object's speed is steady and doesn't change.  A curved-line position/time graph shows that the object's speed changes at different times.

==> Can you tell from a velocity vs time graph where you were when you started walking and were you were when you stopped ?

No. You can't tell from a velocity/time graph where you were when you started walking or were you were when you stopped.  All you can tell from a velocity/time graph is how fast you were moving at each instant during the trip from your start-point to your end-point, and how much total time it took you to make the trip.

If you really know what you're doing, it's possible to use the graph to figure out how far you traveled from start to finish, although the graph doesn't directly show it.

You might be interested in
Two workers are sliding 350 kgkg crate across the floor. One worker pushes forward on the crate with a force of 390 NN while the
svetoff [14.1K]

Answer:

\mu_k=0.18

Explanation:

First, we write the equations of motion for each axis. Since the crate is sliding with constant speed, its acceleration is zero. Then, we have:

x: T+F-f_k=0\\\\y:N-mg=0

Where T is the tension in the rope, F is the force exerted by the first worker, f_k is the frictional force, N is the normal force and mg is the weight of the crate.

Since f_k=\mu_k N and N=mg, we can rewrite the first equation as:

T+F-\mu_k mg=0

Now, we solve for \mu_k and calculate it:

\mu_k=\frac{T+F}{mg}\\ \\\mu_k =\frac{220N+390N}{(350kg)(9.8m/s^{2})} =0.18

This means that the crate's coefficient of kinetic friction on the floor is 0.18.

6 0
4 years ago
If the mass of a material is 50 grams and the volume of the material is 5 cm^3, what would the density of the material be?
kotykmax [81]
D = M / V

D = 50 / 5

D = 10 g/cm^3
5 0
3 years ago
Read 2 more answers
A 0.05-kg car starts from rest at a height of 0.95 m. Assuming no friction, what is the kinetic energy of the car when it reache
statuscvo [17]
The kinetic energy of the car is A.) 0.466 J
6 0
3 years ago
Read 2 more answers
Similar to what you see in your textbook, you can generally omit the multiplication symbol as you answer questions online, excep
lidiya [134]

Answer:

ma= ma

m⋅a = m⋅a

And equivalently:

am=ma

a⋅m = m⋅a

Explanation:

Question

Assuming this question "Similar to what you see in your textbook, you can generally omit the multiplication symbol as you answer questions online, except when the symbol is  needed to make your meaning clear. For example, 1*10^5 is not the same as 110^5 . When you need to be explicit, type * (Shift + 8) to insert the multiplication operator. You will see a multiplication dot (⋅) appear in the answer box. Do not use the symbol x. For example, for the expression ma,

typing m⋅a would be correct, but mxa would be incorrect".

Solution to the problem

For this case we want to write a expression for ma, and based on the previous info we can write:

ma= ma

m⋅a = m⋅a

And equivalently:

am=ma

a⋅m = m⋅a

But is not correct do this:

mxa=mxa

axm = mxa

8 0
3 years ago
Read 2 more answers
What happens if all the heat energy contained in a body is removed? and what will be it's temperature?Explain​
Tema [17]

Answer:

If all the heat energy contained in a body is removed and changes in its temperature is described below in detail.

Explanation:

It moves from a body at a greater temperature to a body at a cheaper temperature. All element survives as solids, liquids, or gases. The material can transfer from one station to another if warmed or cooled. When heat is provided to a body its heat increases: When a physical body, hard, liquid. When heat is provided is stopped to a body its temperature decline.

4 0
3 years ago
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