Answer:
The process of mining is complicated and involves physics. Two main components of mine cycle are Drilling and Blasting. Some important factors in mining are the pillars, rock elasticity, and the slope stability of the ground being mined.
What are the principles that no
one could make you abandon no matter what?
Who do you think you would most likely abandon
your principles for and under what circumstances.
Use examples.
Answer:
There are seven principles that form the content grounds of our teaching framework:
Non-maleficence. ...
Beneficence. ...
Health maximisation. ...
Efficiency. ...
Respect for autonomy. ...
Justice. ...
Proportionality.
tome pushed the ends of a large spring together. he had to hold on tight so the spring did not expand in his hands. what type of energy of the spring was increased?
if the bookstore sold 8 books for $66 at that rate how much was one book
Do you believe that
we are changed by the people who come into our lives
(good or bad)? In what ways do the people we allow in
our lives change us? Do we always have a choice in the
ways they change us? What about experiences and
traumas, do they change us as well? In what ways can
your life change after certain experiences or traumas?
Give examples to explain your answer.
Answer:
In my opinion, I think we do change when people come to our lives because the way we feel around people makes us feel a certain way around all people in our lives in a good way. They can change our lives by being there and helping us physically and mentally. We do have the choice to follow what someone is trying to change us. Example if we have a problem like addiction, we can choose to get help from anyone or choose not to. Traumas can affect us, but we need to seek help to not fear those problems anymore, thats why people who care about us really want us to change our way of health, addictions, and mental health. For me, as a child my dad was deported because he got a dui and decided for as punishment to be deported or to have a life sentence in the U.S. My mom suffered addiction to drugs and alcohol. I lived with my grandparents for almost my whole childhood untill the age of 9. Then my aunt got engaged and my new uncle decided to take us in because DC.S foound out that me and my other sibling weren't in school at all. Like we never attended school. So we were going to be seperated and taken for adoption untill my uncle had the heart to adopt us and here I am today. He gave us a better life because I finally experienced school,clothes, food, and a safer place to live. All the things I went through even abuse. He changed my life and we changed his. He cares about us, we helped him quit drinking, and that impacts him a lot to open up his heart and quit drinking.
Explanation:
What is the formula for the intensity of a spherical wave?
Answer:
When there is a point source used without directing the light or sound in a direction, the area of a sphere = 4πr 2 is used instead of the area of circle for calculating intensity. The minimum intensity of sound that a human can hear is 10 -12 Wm -2 and the maximum is 1 Wm -2.
Explanation:
In the ballistic pendulum experiment, a bullet of mass 0.06 kg is fired
horizontally into a wooden block of mass 0.2 kg. The wooden block is
suspended from the ceiling by a long string. The collision is perfectly
inelastic and after impact the bullet and the block swing together until
the block is 0.12 m above its initial position. Find the velocity of the
bullet and the block just after impact. Round your answer to the
nearest tenth.
The velocity of the bullet and the block just after impact is mathematically given as
u=6.647m/s
v=1.534m/s
Velocity of the bullet and the blockQuestion Parameters:
In the ballistic pendulum experiment, a bullet of mass 0.06 kg is fired
horizontally into a wooden block of mass 0.2 kg.
the block is 0.12 m above its initial position.
Generally the equation for the conservation of energy is mathematically given as
0.5(m+n)v^2=(m+n)gh
Therefore
v^2=2gh
[tex]v=\sqrt{2*9.8*0.12}[/tex]
v=1.534m/s
Hence
mu+m*0=(m+n)v
0.060*u=(0.060+0.2)*1.534
u=6.647m/s
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6. Estimate the line width from thermal Doppler broadening for the CaII K line at 393.3 nm for a star with a temperature of 3,000 K and a star with a temperature of 12,000 K. How does temperature affect line broadening
The line width is calculated as 121.6nm
Data;
Wave length = 393.3nmT1 = 3000kT2 = 12,000KRydberg's FormulaThis is used to calculate the wavelength of an electron when it moves from one state to another.
For Lyman series, n = 1
The energy difference in the two state transitioning are
[tex]n_2[/tex] = ∞
The formula is given thus;
[tex]\frac{1}{\lambda}= R(1(n_1)^2 - \frac{1}{(n_1)^2}.Z^2\\[/tex]
R = Rydberg's constant
Z = atomic number
Since the excited electron dropped from the 1st state to the ground state, the finest line of Lyman series would be
[tex]\frac{1}{\lambda} = R(1(1)^2 - \frac{1}{2^2}).1^2\\z=1\\\lambda = \frac{4}{3} * 912A^o\\\lambda = 121.6nm[/tex]
The line width is calculated as 121.6nm
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Nowadays, the average person encounters more than a hundred advertisements a day, be it in the form of TV and radio commercials, billboards, online promotions, and print ads, among many others. From all the advertisements you encounter, which one caught your attention? Why? Looking at the root of it, what was the underlying cause of the promotion? What does it target? Whom does it target? How does it convey message to target clientele? Is the promoted product a trend or a fad? ESSAY WRITTING PLEASE HELP ME
The essence of the commercial is to draw the attention of the public to the products of a firm.
What is a commercial?Commercials are the primary ways by which companies promote their products. The essence of the commercial is to draw the attention of the public hence the commercial is designed with music graphics and other means that aid effective communication.
The commercial that got my attention is that of the United Bank for Africa owing to the beautiful blend of orchestra music used in the advertisement which appeals immediately to the mind. The advert targets the business class in the society and aims at granting soft credit to small and medium scale entrepreneurs. It conveys its message to the clientele via music. The advert can be regarded as a trend.
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Why should we wait a little after changing the volume of the trapped gas and then take the readings??
We wait a little after changing the volume of the trapped gas, to make sure that is the gas is back to room temperature.
Boyle's law
This law states that the volume of a fixed mass of a gas is inversely proportional to its pressure provided that temperature remains constant.
P₁V₁ = P₂V₂
Why we wait a littleWe wait a little after changing the volume of the trapped gas, to make sure that is the gas is back to room temperature because a change in temperature can alter the accuracy of the experiment.
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You stretch your arm and rotate around the center of yourself in the horizontal plane. Suppose you make 2 full revolutions every 1 second, and the distance from the center of your body to the tip of your finger is 1.2 m.
Find:
(a) Find the angular speed of your rotation
(b) Find the period of rotation.
(c) Find the speed of the tip of your finger
(a) The angular speed of the rotation is 12.57 rad/s
(b) The period of the rotation is 0.5 s.
(c) The speed of the tip of your finger is 15.08 m/s.
Angular speed of the rotationThe angular speed of the rotation is calculated as follows;
ω = 2πN
where;
N is number of revolutionsω = 2π x (2) = 4π = 12.57 rad/s
Period of rotation[tex]\omega = 2\pi f\\\\f = \frac{\omega}{2\pi} \\\\T = \frac{1}{f} = \frac{2\pi}{\omega} \\\\T = \frac{2\pi}{4\pi} = 0.5 \ s[/tex]
Speed of your fingerv = ωr
v = 12.57 x 1.2
v = 15.08 m/s
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What is the gravitational field strength of a 5 kg object that weighs 25 N?
Answer:
gravitation field strength: 5 N/kg
Explanation:
Weight(N) = mass(kg) * gravitational field strength(N/kg)
Here given the mass: 5 kg and weight: 25 Nmake sure the units are proper and make change only if different units visible. Like mass given in grams and covert it into kg. *must* and sometimes weight given in kilo-newton covert it into Newtons. *must*
using the formula:
5 * gravitational field strength = 25
gravitational field strength = 25/5
gravitational field strength = 5 N/kg
what are the steps to measure the density of a solid?
Answer:
The five steps for determining density can be found in simple form as follows, measure the mass of the container, measure the volume of the liquid(s), measure the combined mass of the liquid and the container, and then determine the mass of the liquid alone and divide the mass by the volume of it.
You want to cross a river that is 30 m wide and flows to the East at 3.0 m/s . You can swim at a speed of 5.0 m/s (relative to the water). If you start from the South side of the river and want to go straight across, at what angle should you point yourself
Answer:
Approximately [tex]\text{N$37^{\circ}$W}[/tex] (approximately [tex]37^{\circ}[/tex] west of north.)
Explanation:
The velocity of the swimmer relative to the water is given to be [tex]v(\text{swimmer})= 5.0\; {\rm m\cdot s^{-1}}[/tex]. Decompose this velocity into two components:
parallel to the flow of the river: [tex]v_{\parallel}(\text{swimmer})[/tex];perpendicular to the flow of the river: [tex]v_{\perp}(\text{swimmer})[/tex].Decompose the velocity of the current [tex]v(\text{current}) = 3.0\; {\rm m\cdot s^{-1}}[/tex] along the same set of directions.
parallel to the flow of the river: [tex]v_{\parallel}(\text{current}) = 3.0\; {\rm m\cdot s^{-1}}[/tex] to the east;perpendicular to the flow of the river: [tex]v_{\perp}(\text{current}) = 0\; {\rm m\cdot s^{-1}}[/tex] (Note that the current in the river flows along the river, not toward the banks of the river.)The velocity of the swimmer relative to the bank would be the vector sum [tex](v(\text{swimmer}) + v(\text{current}))[/tex]. Decompose this vector sum in the same directions:
parallel to the flow of the river: [tex]v_{\parallel}(\text{swimmer}) + v_{\parallel}(\text{current})[/tex];perpendicular to the flow of the river: [tex]v_{\perp}(\text{swimmer}) + 0\; {\rm m\cdot s^{-1}} = v_{\perp}(\text{swimmer})[/tex].Swimming straight across requires that the swimmer travel towards the banks but not along the banks. In other words, the velocity of the swimmer relative to the bank should be [tex]0[/tex] in the direction of the river: [tex]v_{\parallel}(\text{swimmer}) + v_{\parallel}(\text{current}) = 0[/tex].
Rearrange to obtain:
[tex]v_{\parallel}(\text{swimmer}) = -v_{\parallel}(\text{current})[/tex].
Thus, [tex]v_{\parallel}(\text{swimmer})[/tex] should be the exact opposite of [tex]v_{\parallel}(\text{current})[/tex].
Since [tex]v_{\parallel}(\text{current}) = 3.0\; {\rm m\cdot s^{-1}}[/tex] to the east, [tex]v_{\parallel}(\text{swimmer})\![/tex] should be [tex]3.0\; {\rm m\cdot s^{-1}\![/tex] to the west.
Refer to the diagram attached: [tex]v(\text{swimmer})[/tex] and its two components [tex]v_{\parallel}(\text{swimmer})[/tex] and [tex]v_{\perp}(\text{swimmer})[/tex] are the three sides of a right triangle, with[tex]v(\text{swimmer})= 5.0\; {\rm m\cdot s^{-1}}[/tex] as the hypotenuse.
Since the swimmer is travelling to the north, [tex]v_{\perp}(\text{swimmer})[/tex] would point northward.
The side [tex]v_{\parallel}(\text{swimmer})[/tex] would be opposite to the angle between the hypotenuse [tex]v(\text{swimmer})= 5.0\; {\rm m\cdot s^{-1}}[/tex] and north ([tex]v_{\perp}(\text{swimmer})[/tex],) Thus, the value of that angle would be:
[tex]\begin{aligned}& \arcsin\left(\frac{\text{opposite}}{\text{hypotenuse}}\right) \\ \\ =\; & \arcsin\left(\frac{3\; {\rm m\cdot s^{-1}}}{5\; {\rm m\cdot s^{-1}}}\right) \\ \approx \; & 37^{\circ}\end{aligned}[/tex].
Since [tex]v_{\parallel}(\text{swimmer})[/tex] points to the west, the direction of [tex]v(\text{swimmer})[/tex] would be approximately [tex]37^{\circ}[/tex] west of north, [tex]\text{N$37^{\circ}$W}[/tex].
(HELP PLEASE!!!)
A student is investigating the distribution of charge in a conductor. He attaches two unopened soda cans on their sides to two foam cups with tape. He sets the soda cans with the cups onto a tabletop so that they are touching one another. Then he moves a negatively charged balloon close to the left soda can The set up for the investigation is shown above.
How do the electrons move in the soda cans?
A. They move to the bottom in both cans.
B. They move from the left can to the right can
C. They move to the top of both cans.
D. They move from the right can to the left can.
Answer:
Electrons repel one another - they will move "away" from the left side of the leftmost can- (the right can must become more negatively charged than the left can) -
B appears to be the best answer
The electrons move from the left soda can to the right soda can. The answer is (B).
When the negatively charged balloon is moved close to the left soda can, it will repel the negatively charged electrons in the soda can. This will cause the electrons to move away from the balloon and distribute themselves within the soda can.
Since the soda cans are in contact with each other, the excess electrons from the left soda can will be repelled by the negative charge on the balloon and will flow to the adjacent right soda can. The electrons will continue to move until there is no potential difference between the two cans, which means that they will stop flowing when both cans have the same amount of negative charge.
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which religious group did not expand their membership by great numbers during the Second Great Awakening
Answer:
The Catholics.
Explanation:
see answer.
Odina walked down the hall at school from the cafeteria to the band room, a distance of 100.0m. A class of physics students
recorded and graphed her position every 2.0s, noting that she moved 2.6m every 2.0s. Odina was 25m from the band room
at 58s.
Please select the best answer from the choices provided
Т
F
Find distance she traveled:
100m -25m = 75m
58 seconds / 2 second intervals = 29
29 x 2.6m = 75.4 meters total.
if the distance wasn’t rounded the statement was False.
Answer: False
what is the name of the scientist that discovered gravity?
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[tex] \large\green{\overline{\underline{\rm{\red{•••••••••••••••••••••••••}}}}} [/tex]
what is the name of the scientist that discovered gravity?
Isaac Newton
[tex] \large\green{\overline{\underline{\rm{\blue{•••••••••••••••••••••••••}}}}} [/tex]
#CarryOnLearning
#LibreAngMatuto
The scientist named Isaac Newton discovered the gravity. But before that Aristotle was discovered the gravity first but the calculations were poor and not enough for knowing what it is.
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since Ethanol has a heat capacity of 0.614 cal/g °C. If 50 g of ethanol has a temperature of 30ºC and a piece of hot Copper is added to the ethanol causing the temperature to increase to 70ºC. What is the amount of heat absorbed by the ethanol?
This question involves the concepts of heat capacity, temperature, and heat.
The heat absorbed by ethanol is "1228 cal".
HEAT CAPACITYThe heat capacity of a substance is defined as the amount of heat absorbed by a unit amount of that substance for a degree rise in temperature. Mathematically,
[tex]Q = mc\Delta T[/tex]
where,
c = heat capacity = 0.614 cal/g.°Cm = mass of ethanol = 50 gΔT = change in temperature = 70°C - 30°C = 40°CQ = amount of heat absorbed = ?Therefore,
Q = (50 g)(0.614 cal/g°C)(40° C)
Q = 1228 cal
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When it rains, the roads are most slippery
A: Just after the rain stops and the road is drying off.
B: Just after the rain begins,
because oil dropped from vehicles
has not yet been washed away.
C: After several days of rainy weather, because the
road surface becomes waterlogged.
Answer:
c
Explanation:
after several days of rainy weather, because the road surface becomes waterlogged
Boxes A and B are in contact on a horizontal, frictionless surface. Box A has mass 20.0 kg and box B has mass 5.0 kg. A horizontal force of 100 N is exerted on box B. What is the magnitude of the force that box B exerts on box A
Answer:
80 N
Explanation:
For A + B: the net force is 100 N = (mA + mB)*a
a = 100/(20 + 5) = 100/25 = 4 m/s²
For A, the net force = mA * a = 20 * 4 = 80 N
Which of the following is TRUE about visible light?
A.
Visible light can never harm you.
B.
Visible light can’t be seen.
C.
Visible light is not real.
D.
Visible light is radioactive and causes skin cancer.
Answer:
i would guess d because it seems the most correct
Explanation:
a. thought it is small, visible can harm you
b. visible light is the only light humans can see with the bare eye
c. visible light is real and can be seen
d. visible light can be radioactive and can cause skin cancer (it is not definite)
Brainliest if correct
Answer:
A
Explanation:
hope it helps you make brainliest
1) A man mass is 150 kg
a) calculate the gravitational force with the formula 10ms[tex] {}^{ - 2} [/tex]
10 ms^-2 is acceleration due to gravitational force
mass = 150kg
force ( weight of the man ) = mass × acceleration due to gravitational force (g)
weight = 150kg × 10ms^-2 = 1500 kg/ms² ( N )
[tex]10 ms {}^{ - 2}[/tex]is acceleration due to gravitational force
mass = 150kg
force (weight ) = mass × gravitational force
weight = 150kg × [tex]10ms {}^{ - 2}[/tex] = 1500 kg/ms²
Which describes the magnetic field that forms when a wire carries an electric current?
It is in a line perpendicular to the wire.
It is in a line parallel with the wire.
It is in a cylinder around the wire.
It is in a cylinder across the wire.
Answer:
It is in a line parallel with the wire.
Explanation:
trust me
Answer:
b on edge
Explanation:
yes
What is the resistance of R1
Answer:
R1 is the first resistance level. It usually falls above the pivot point and below R2 but there are circumstances (see below) when the pivot point can be above R1. R1 is calculated as part of the Pivot Points calculations that traders use to determine where the market might reverse direction.
Explanation:
Answer questions based on the lab activity.
Assignment
Throughout the reflection, make sure you have a copy of the Student Guide and your data tables. Use the drop-down
menus to complete the statements.
was
This experiment was divided into two parts. For the first part of the experiment, the
intentionally manipulated. This was the independent variable. The dependent variable measured was the
was intentionally manipulated. This was the
by the second part of the experiment, the
independent variable. The dependent variable measured was the
Answer: 1. height of cylinder 2. temperature of cylinder 3.mass of cylinder 4.temp. of cylinder
Explanation:
im doing it rn ! hope this helps :)
The dependent variable gets impacted by changes to the independent variable. Therefore, in the below given ways blanks can be filled.
What are dependent and independent variable?The variable that the experimenter controls is the independent variable. The variable that adapts to the independent variables is known as the dependent variable. The two factors could be connected through cause and effect. The dependent variable gets impacted by changes to the independent variable.
The experiment was divided into two parts. For the first part of the experiment, the height of cylinder was intentionally manipulated. This was independent variable. the dependent variable measured was the temperature of cylinder.
For the second part of experiment, the mass of cylinder was intentionally manipulated. This was the independent variable. The dependent variable measured was the temperature of cylinder.
Therefore, in the above given ways blanks can be filled.
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How much force is required to accelerate a 800kg car by 15 m/s2
Answer:
force=12000
Explanation:
F=m*a aka force equals mass times acceleration so 800*15=12000
Answer:
12000 N
Explanation:
The equation for Force is:
[tex]Force=mass*acceleration[/tex]
We can plug in the given values into the equation:
[tex]Force=800kg*15m/s^2\\Force=12000N[/tex]
Can someone help me with this question AASP
You arrive at a crime scene in a high traffic area shortly after first responders have removed the victim. There are a number of bloody footprints at the scene. After ensuring that the scene is secured from further contamination, what is the most important step to take?
Group of answer choices
obtain the names of all medical personnel who had been at the site
obtain statements from witness
take photographs of all visible footprints
Search for more evidence
Answer:
It seems like c or d I'll say c
Answer:
I believe the answer to be D, search for more evidence. You have to gather evidence while it's still fresh
In the combo circuit diagrammed, R1 = 19.2 Ω, R2 = 20.7 Ω, and R3 = 25.8 Ω. Find the equivalent resistance of the circuit.
Answer:
Equivalent resistance: 13.589 Ω
Explanation:
R series = R1 + R2 + R3 ...
[tex]\frac{1}{R_{eq} } = \frac{1}{R1} +\frac{1}{R2} +\frac{1}{R3} ...[/tex]
Find the equivalent resistance of the right branch of the circuit:
[tex]R_{eq} = R_{2} +R_{3} \\R_{eq} = 20.7 + 25.8 = 46.5 ohms[/tex]
[tex]\frac{1}{R_{eq} } = \frac{1}{19.2} +\frac{1}{46.5}\\\\\frac{1}{R_{eq} } = 0.0735887097\\\\R_{eq} = 13.5890411[/tex]
Light waves can interact with matter by being transmitted, absorbed, or ____؟
- help me pleas
Answer:
reflectedExplanation:
Light waves can interact with matter by being transmitted, absorbed, or reflected .
Answer:
Reflection
Explanation:
The answer must be 20
During an experiment a student records the net horizontal force exerted on an object moving in a straight
line along a horizontal frictionless track. The graph above shows the force as a function of time, or the
following, which is the best approximation of the magnitude of the change in momentin of the object
between 0s and 4 s?
20
15
0
ww
SH
M
16
1
1
TIN
40 kg om's
a
20 kg oms
b. 30 kg oms
d
The magnitude of the change in
momentum cannot be determined without
knowing the mass of the object
The best approximation of the magnitude of the change in momentum of the object between 0s and 4 s is 40 kgm/s.
Change in momentum of the objectThe change in the momentum of the object is determined from the impulse received by the object at the given period of time.
The change in momentum of the object is calculated as follows;
ΔP = Ft
where;
F is the force at time 4 s = 10 Nt is time = 4 sΔP = Ft
ΔP = 10 x 4
ΔP = 40 Ns = 40 kgm/s
Thus, the best approximation of the magnitude of the change in momentum of the object between 0s and 4 s is 40 kgm/s.
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