Answer:
0.8 g/cm³
Explanation:
recall that the definition of density is the mass per unit volume of an object.
or mathematically:
density = mass / volume
here we are given that mass = 8 g and volume = 10 cm³
hence,
density = 8 g / 10cm³ = 0.8 g/cm³
The block has a mass of 8 g with a volume of 10 cm³. It density is mass divided by volume that is 0.8 g/cm³.
What is density?
Density of a substance is the measure of its mass per unit volume. Density is dependent on some other factors beside mass and volume such as bond type, temperature and pressure.
The ratio of density of a substance to the density of water is called its specific gravity. If the substance is denser than water it will sink on water otherwise it will float on it.
The mass of the block of wood = 8 g
volume = 10 cm³
Density = mass / volume
= 8 g/ 10 cm³
= 0.8 g/ cm³
Therefore, the density of the wood block is 0.8 g/ cm³.
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Consider a spring that does not obey Hooke's law very faithfully. One end of the spring is fixed. To keep the spring stretched or compressed an amount x, a force along the x-axis with x-component Fx=kx−bx2+cx3 must be applied to the free end. Here k=100N/m, b=700N/m2, and c=12000N/m3. Note that x>0 when the spring is stretched and x<0 when it is compressed.
Answer:
The work done will be 0.115 J.
Explanation:
Given that,
[tex]k=100\ N/m[/tex]
[tex]b=700\ N/m^2[/tex]
[tex]c=12000\ N/m^3[/tex]
A force along the x-axis with x-component,
[tex]F(x)=kx-bx^2+cx^3[/tex]
Suppose, How much work must be done to stretch this spring by 0.050 m from its unstretched length?
We need to calculate the work done
Using formula of work done
[tex]W(x)=\int{F(x)dx}[/tex]
Put the value into the formula
[tex]W(x)=\int{(kx-bx^2+cx^3)dx}[/tex]
[tex]W(x)=\dfrac{kx^2}{2}-\dfrac{bx^3}{3}+\dfrac{cx^4}{4}[/tex]
Put the value of k,b,c and x
[tex]W(0.050)=\dfrac{100\times(0.050)^2}{2}-\dfrac{700\times(0.050)^3}{3}+\dfrac{12000\times(0.050)^4}{4}[/tex]
[tex]W(0.050)=0.115\ J[/tex]
Hence, The work done will be 0.115 J.
The value of spring displacement is greater than zero. Therefore, spring is stretched.
Force in spring :
It is given as, [tex]F=kx[/tex]
Where k is constant and x is amount of displacement.
The force function is given that,
[tex]F(x)=kx-bx^{2}+cx^{3}[/tex]
Here given that, [tex]k=100N/m, b=700N/m^{2} , c=12000N/m^{3} .[/tex]
Substitute all values in above equation,
[tex]F(x)=100x-700x^{2} +12000x^{3}[/tex]
To check, the spring is stretched or it is compressed.
Substitute f(x) = 0
We get x is greater than zero.
Thus, The value of spring displacement is greater than zero. Therefore, spring is stretched.
Learn more about the spring force here:
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Why do mass numbers have a trailing decimal? use the following words describe for credit isotopes protons neutrons electrons in carbon 13
HELP ME
Answer:a number without a decimal are generally not significant. Isotopes are atoms of same element which have the same atomic number but different number of neutrons. Isotopes of elements are represented in the following way: In an atom, the number of protons is equal to its atomic number.. An atom of an element is neutral in nature so atom contains the same number of protons and electrons.
Explanation:
physical egicatinal facts
Answer:
???????? please give for info
Which of the cars has a displacement North of its initial position?
A car travels North for 5 miles, turns around and returns to the starting position.
A car travels North for 5 miles, turns around and returns to the starting position.
A car travels South for 5 miles, turns around and returns to the starting position.
A car travels South for 5 miles, turns around and returns to the starting position.
A car travels North for 5 miles, turns around and travels South for 8 miles.
A car travels North for 5 miles, turns around and travels South for 8 miles.
A car travels South for 5 miles, turns around and travels North for 8 miles.
The correct answer is A car travels South for 5 miles, turns around, and travels North for 8 miles.
Explanation:
Displacement is determined by the change in position. This means there is displacement if the initial position of a body such as a car is different from the final position. Also, the displacement is considered in terms of direction (North, South, East, West). In this context, if a car travels South or North and then returns to its initial position there is no displacement.
According to this, the only option that shows a displacement North is "A car travels South for 5 miles, turns around and travels North for 8 miles" because in this case, the car had a change in position as it first moved 5 miles south (a displacement of 5 miles South) and then 8 miles north, which changes the displacement to 3 miles North (5 miles South - 8 miles North = 3 miles North).
Pls Answer I have a time limit!!!
How can mass be measured?
Group of answer choices
bathroom scale
spring scale
balance
scale
Answer:
Balance scale would be the answer
Answer:
The basic SI unit of mass is the kilogram (kg). In physics, mass is not the same as weight, even though mass is often determined by measuring the object's weight using a spring scale, rather than balance scale comparing it directly with known masses.
Balanced Scale
What are three ways less gravity changes the human body
Which is a trend for marriage and having children today as compared to past generations?
A.
More people are waiting to cohabitate until after marriage and not having children.
B.
More people are getting married overall and having children immediately.
C.
More people are waiting to get married and typically feel regret after having children.
D.
More people are marrying later and having children later in life.
Answer:
D
Explanation:
Answer:
itssss D
Explanation:
What is the momentum of a 950 kg car moving at 10.0 m/s?
9.5 kgm/s
95 kgm/s
9500 kgm/s
95000 kgm/s
Answer:
The answer is 9500 kgm/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocityFrom the question
mass = 950 kg
velocity = 10.0 m/s
We have
momentum = 950 × 10
We have the final answer as
9500 kgm/sHope this helps you
Question #005- List 10 active things you can do with your family/parents this weekend? (Please be sure to number them.)
i suck at this lol
Cycling
Walking
Shopping
Exercising
Dancing
Playing physical games
Sport
Cooking
Working around the house
Gardening
Hope this helps:D
3. A 10 kg dog ran across a field at a speed of 12 m/s. How much kinetic energy did it have?
Define the amplitude of a wave
Answer:
amplitude of a wave is the maximum displacement of a particle from its rest position
HELP!!!
In the "Monster study," what did psychologists tell the group of orphans who did not suffer from stuttering?
A.
They were told that they weren’t really stutterers.
B.
They were told that they had very severe cases of stuttering.
C.
They were told that stuttering could be overcome with practice.
D.
They were told that their parents were responsible for their stuttering.
Please select the best answer from the choices provided
A
B
C
D
Answer:
They were told that they had very severe cases of stuttering.
Explanation:
The monster study conducted in 1939 was a certain stuttering experiment that was done by Wendell Johnson on 22 Orphan at the University of Iowa, United States. Eleven of the children got positive speech therapy while the other half was seen to have negative speech therapy which belittled them for their speech imperfections.
The experiment was called monster because many people were horrified that such experiments could be done on children who were orphans.
B. They were told that they had very severe cases of stuttering.
The Monster Study was conducted by Dr. Wendell Johnson to learn more about why children developed a stutter and to see if stuttering was a result of learned behavior. However, there are several ethical problems with the the Monster study.
In this study, psychologists tell the group of orphans who did not suffer from stuttering that they had very severe cases of stuttering.
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Silver has a resistance of 0.0198 ohms. What voltage would produce a current of 250 amps?
Answer:
V= I x R =250 x 0.0198 = 4.95 Volts
Explanation:
The voltage across the resistor is 4.95 Volts.
How do you calculate the voltage?Given that the resistance is 0.0198 ohms and the current flowing through the silver is 250 amps.
The voltage V across the resistor is the product of the current I flowing through the resistors and resistance R.
[tex]V = IR[/tex]
Substituting the values, we get the voltage.
[tex]V = 250 \times 0.0198[/tex]
[tex]V = 4.95 \;\rm V[/tex]
Hence we can conclude that the voltage across the resistor is 4.95 Volts.
To know more about the voltage, follow the link given below.
https://brainly.com/question/238298.
What was the instantaneous speed of Bear A at 5 seconds in meters/min? (No unit conversions necessary, no units required for answer).
Answer:
Answer: The answer is 40.
Explanation: There is a typo, they mean 5 minutes. Five minutes is the line between zero and 10, and the dot matches up at 5 and 200. 200 divided by 5= 40.
(i got this answer from: https://brainly.com/question/18253554)
Pregunta 2
George took his puppy to a dog park and unleashed her once they entered the gate. The puppy accelerated Northward, from rest, to 15 meters per second in 10
seconds. What was China's displacement in this time interval?
If a force of 20 N is applied to a mass of 5 kg, what is the acceleration?
Answer:
4 m/s^2
Explanation:
To get the acceleration you are going to use the acceleration formula which is
Acceleration= Force/Mass.
You then do the math which is 20/5, which equals 4
Therefore you get a value of 4. You may be asking what the units are. The units of acceleration are m/s^2 (meters per second squared)
So your final answer is 4 m/s^2
How can a small boy balance a big boy
on asea- saw ? Show with a diagram
Answ
— How can a small boy balance a big boy on a sea-saw? Show with a diagram. fast please...... Get the answers you need, now!
2 answers
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Explanation:
Newton's second law of motion is also known as
a) quantitative law of motion
b) quantitative law of force
c) qualitative law of motion
d) qualitative law of force
Answer:
Newton's second law of motion is quantitative law of force . Newton's first law of motion is qualitative law of force.
Please help
Quickly!!!..
The stage of respiration that releases most of the energy in glucose occurs in the ______.
Put the steps in order to show how crystals are formed
Answer:
A) Formation of ions
B)Formation of ionic bonds
C)Formation of cubes
D)Formation of crystals
Hope this helps
Answer:
1 4 2 3
Explanation:
edge 2021
What happens to the lost mass during nuclear reactions in a star's core?
O It is destroyed
O It becomes dark matter
O It is ejected into space
O It is converted to energy
Round the following answer to the correct number of
significant figures. 25.657 + 134.24 = ? *
Answer:
I'm pretty sure its 160, correct me if I am wrong
Explanation:
Answer:
ya it is 160
Explanation:
the original answer is 159.897 so if u round it to 3 Sig u get 160
The speed of a fishing boat is 15 km/hr. How far will the boat travel in 6 hours?
Answer: 90 Km
Explanation:
15 Km/hr X 6/hr = 90Km
whu is it important to mave regular supervision of weights and measurements in the market
Answer:
Hope the answer helped you. if yes pls follow me
Explanation:
the fundamental answer is without regular supervision of definition of weights and measures,commerce exchange will be impossible and there would be no market whatsoever for anything.
Answer:
the fundamental answer is without regular supervision of definition of weights and measures,commerce exchange will be impossible and there would be no market whatsoever for anything.
Explanation:
"who"
A car traveling around a corner
A. position
B. speed
C. velocity
D. acceleration
THE ANSWER IS D THERE YOU GOO
In a game of tug-of-war, a rope is pulled to the left with a force of 75 N and to the right with a force of 100 N. What is the magnitude and direction of the net external force on the rope?
Answer:
25 N to the Right
A car traveling on 1-96 approached a construction zone and slowed from 65 miles per hour (30 meters/second) to 45 mph (20m/s) in
5 seconds. Calculate the distance the car will take to slow down.
What does normal force have to do with gravity?
Answer:
grav times mass equals force
Explanation:
Write how the pairs of words or phrases are alike and different. Conservation of energy and energy transferConservation of energy: Energy is neither created nor destroyed in an ordinary chemical or physical process; this is also known as the first law of thermodynamics.Energy transfer: The transfer of energy from one object to another or from one form to another.Alike: Different:
Answer:
Similarities:
Energy can be transferred from one form to another in both systems.
Difference:
Energy can only be created or destroyed in conservation of energy.
Explanation:
Conservation of energy: tell us that energy can neither be created nor destroyed, but can be transferred from one form to another. e.g Chemical to mechanical ( combustion of fuel in vehicle to achieve mechanical work. )
Energy transfer Conservation
Energy can be stored or transferred from one form to another, but it cannot be created or destroyed.
Similarities:
Energy can be transferred from one form to another in both systems.
Difference:
Energy can only be created or destroyed in conservation of energy.