Explanation:
Mass=7 kg means that it weights 7 kg while measuring on beam balance .
I NEED THE ANSWER TO PASS SO I CAN GET MY PHONE BACK HELPPPPPPPPPPPPPP
Answer:
it would be c.
Explanation:
starts at zero and isn't a straight shot up
A student conducts an experiment to determine how the temperature of water affects the time for sugar to dissolve. In each trial, the student uses a different amount of sugar and a different temperature of water.
What is wrong with this experimental design?
A. The student does not have a dependent variable.
B. The student changed too many variables.
C. The student needs to perform more trials.
D. The student did not change enough variables.
Which of the following is the best order-of-magnitude estimate in meters
of the height of a mountain?
a. 1 m
b. 10 m
c. 100 m
d. 1000 m
Answer:2
Explanation:
Need answer
Me podrían dar la respuesta y el proceso?
Answer:
I don’t understand Espanol
Explanation:
sorry
Which of the following statements is an example of a vector quantity. SP1.c.
A. acceleration
C. speed
B. distant
D. time
Answer: speed
Explanation:
Speed is the important key to the vector quantity
A car speeds up from 3 m/s to 10 m/s in 8 s. How far does the car travel while doing this? 2. A
Initial velocity=u=3m/s
Final velocity=v=10m/s
Time=t=8s
[tex]\boxed{\sf Acceleration=\dfrac{v-u}{t}}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{10-3}{8}[/tex]
[tex]\\ \sf\longmapsto Acceleration=\dfrac{7}{8}[/tex]
[tex]\\ \sf\longmapsto Acceleration=0.8m/s^2[/tex]
Distance =sUsing second equation of motion
[tex]\\ \sf\longmapsto s=ut+\dfrac{1}{2}at^2[/tex]
[tex]\\ \sf\longmapsto s=3(8)+\dfrac{1}{2}(0.8)(8)^2[/tex]
[tex]\\ \sf\longmapsto s=24+0.4(64)[/tex]
[tex]\\ \sf\longmapsto s=24+25.6[/tex]
[tex]\\ \sf\longmapsto s=49.6m[/tex]
a person can run 280m in 68s. at what speed are they running?
Answer:
Explanation: divide 280 by 68 which would = 4 I think
Is the melting point of an object a physical or chemical property
Calculate the speed of a wave that has a frequency of 20,100 Hz and a wavelength of 0.67 m.
Answer: 13,467 m/s
Explanation: The speed of a wave equals the frequency of the wave multiplied by the wavelength. In this instance the speed = 20,100 Hz * 0.67 m.
Balance the nuclear equation
43
19K −→ 43
20 Ca + ?
1. ? = 1
0n
2. ? = 1
1p
3. ? = 43
18Ar
4. ? = 0
−1
β
5. None of these
6. ? = 43
−1
e
7. ? = 0
1
e
Answer:
Balance the nuclear equation
43
19K −→ 43
20 Ca + ?
1. ? = 1
0n
2. ? = 1
1p
3. ? = 43
18Ar
4. ? = 0
−1
β
5. None of these
6. ? = 43
−1
e
7. ? = 0
1
e
8. ? = 1
0n
9. ? = 2
3He
10. ? = 4
−1
p + e- + α
11. ? = 40
24Mg + β+ → 20 22Ne + γ
12. ? = 0
13C(β-)13N(e-)13C* → 13N(β-)13C(γ)13O + γ
The previous article was about the first step of fission process. The second step of fission is called secondary nuclear reaction, which includes the alpha decay and beta-minus (negative electron), beta-plus (positive electron), and gamma (high energy X-ray) emissions. Secondary nuclear reactions produce more neutrons than those produced by primary nuclear reaction.
The combining of two nuclei with less mass number than the original is called alpha decay, whereas, taking off a beta particle from nucleus is called beta-minus (negative electron), if the nucleus takes off a beta particle and proton, it is called beta-plus (positive electron), and a gamma ray with extremely high energy is called gamma emission.
The secondary nuclear reactions produce more neutrons than those produced by primary nuclear reaction. There are 5 common secondary nuclear reactions that can be seen in the fission process, as follows:
Alpha decay: α
Beta-minus (negative electron): β−
Beta-plus (positive electron): β+
Gamma emission: γ
Positron emission: β+
Explanation:
Alpha decay is a process in which a radioactive isotope emits an alpha particle and transforms into the element with 2 less protons. For example:
"43 19K → 20 22Ne + α"
In the previous equation, K-19 transforms into Ne-22 through alpha decay. The mass number decreases by 4 and the atomic number increases by 2. For instance 17O-16 becomes 18F-19 when it decays to fluorine. In this process, the mass number decreases by 4 and the atomic number increases by 2.
Beta-minus (negative electron) is a process of emitting an electron with negative charge from the nucleus. The electron that moves out of the nucleus has less energy than beta particle emitted during beta decay, which means it can be stopped easily with just a piece of paper.
Beta-minus (negative electron): β−
For example: "14 7N → 14 7C* + β−"
In the previous equation, N-14 transforms into C-14 through beta minus. The mass number remains unchanged and the atomic number decreases by 1. For instance 8O-15 becomes 8F-14 when it decays into fluorine. As the beta particle emitted in this process is negative, so the mass number remains unchanged and the atomic number decreases by 1.
Beta-plus (positive electron) is a process of emitting an electron with positive charge from the nucleus. The electron that moves out of the nucleus has more energy than beta particle emitted during beta decay, so it can be stopped only by special means like aluminum foils or other very dense materials.
Beta-plus (positive electron): β+
For example: "8 7Be → 8 4He + β+"
In the previous equation, Be-8 transforms into He-4 through beta plus. The mass number remains unchanged and the atomic number decreases by 2. For instance 14N-15 becomes 14O-8 when it decays into oxygen gas. As the beta particle emitted in this process is positive, so the mass number remains unchanged and the atomic number decrease by 2.
Gamma emission is a process of emitting electromagnetic waves from nuclei with no change to nuclear structure. Gamma radiation has less frequency than X-rays but higher energy, so gamma rays are very powerful radiation means that can pass through human body easily, whereas X-ray has less power so cannot pass through human body easily. Gamma rays are also used for imaging purposes because they are high penetrating power source which allows scientists to see inside opaque objects like humans or rocks without harming people or things.
Gamma emission: γ
For example: 2 1H → 1 0n + γ"
In the previous equation, H-2 transforms into neutron through gamma emission. The mass number remains unchanged and the atomic number is decreased by 1. For instance 13N-14 becomes 14O-13 when it decays into oxygen gas with radiation of gamma ray. As this process does not change the mass number so the atomic number decreases by 1.
Positron emission is a process in which an electron with positive charge moves out of nucleus to form an atom of anti-matter (the anti-particle). If matter and anti-matter collide each other they destroy themselves, but positrons are used in medicine for imaging because they emit radiation.
Positron emission: β+
For example: 1 1H → 1 0n + γ + β+"
In the previous equation, H-1 transforms into neutron through gamma emission and beta plus emission. The mass number remains unchanged and the atomic number is decreased by 2. For instance 13N-14 becomes 14O-13 when it decays into oxygen gas with radiation of positrons and gamma rays. As this process decreases the atomic number by two, so the mass number remains unchanged during decay process.
Eating a banana enables s person to perform about 4×10⁴ J of work. To what vertical height does eating a banana enable a 50kg woman to climb?(g=10m/s²)
Answer:
80m
Explanation:
potential energy = MGH
p.e = 50 X 10 X h
4x10⁴ = 500 X h
h = 4x10⁴/500
h = 80m
The woman is enable to climb 80m after eating a banana.
What is gravitational potential energy?The energy that an item has or acquires when its location changes as a result of being in a gravitational field is known as gravitational potential energy. Gravitational potential energy can be defined as an energy that has a connection to gravitational force or gravity.
Given parameters:
Eating a banana enables s person to perform about 4×10⁴ J of work.
Mass of the woman; m = 50 kg.
Acceleration due to gravity; g = 9.8 m/s².
Let she can climb a vertical height of h after eating a banana.
At height h; her gravitational potential energy: E = mgh
From conservation of energy,
her gravitational potential energy = 4×10⁴ J
⇒ 50 X 10 X h = 4×10⁴
⇒ h = 4x10⁴/500
⇒ h = 80m
Hence, she can climb 80m vertical height.
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13.1 An object has an excess of 50 electrons. What
is the charge on the object in picocoulomb?
Answer:
-50* 1.6*10^-19 = -80*10^-19 = -8*10^-18 C
1) The SI Unit for intensity is a ms! b. Nm? C. SI d. Wm
Answer:
The SI unit for intensity is watts per square meter (W/m2)
an energy transformation flow diagram is shown what type of energy does X most likely represent
X represent the wind energy that converted to electrical energy
What topic name does this equation go into in physics?[tex]A_{x} = A cos\theta[/tex]
Answer:
Trigonometry
Explanation:
[tex] \huge \boxed{\mathfrak{Question} \downarrow}[/tex]
What topic name does this equation go into in physics?[tex]A_{x} = A cos\theta[/tex][tex] \large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}[/tex]
[tex] \huge \boxed{\sf \: A_{x} = A cos\theta}[/tex]
So, I think this equation will go under Types of Physical quantities, Vector Quantities, Magnitude, Direction, etc. under physics & Trigonometry under Mathematics.This formula is used when we need to find the 'x' component of the vector. You need to know basic trigonometry to solve these type of equations & also how to convert between magnitude & angles.If you are given a graph with two shiftable lines, the correct answer will always require you to move both lines.
The correct answer of a graph with shiftable lines will not require you to move both or any lines.
When the lines of a graph is shifted, the new line will have a new equation different from the original or previous line.
This means that you do not have to move the lines of the graph before getting the correct answer.
In all cases, the point of intersection of the two lines is the solution to the graph.
However, if the two lines do not intersect, then the graph does not have a solution.
So, the correct answer of a graph with shiftable lines will not require you to move both or any lines.
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Q:-What is speed????
Explanation:
In everyday use and in kinematics, the speed of an object is the magnitude of the rate of change of its position with time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity.
SI unit: m/s, m s−1
s=d/t
Convert 27 Fahrenheit to Celsius
Answer:
27 degrees Fahrenheit is -2.78°c
Which of the following is certain to change as a ball
accelerates?
A mass of the ball
B inertia of the ball
C velocity of the ball
Dforce acting on the ball occasionally
Answer:
C. Velocity of the ball
Explanation:
This is because as the acceleration of the ball increases, there will be an increase in the velocity rate and decrease in the time.
See the formula,
a=m/s²
Learning Check: Ranking Elements
Use the following five elements to answer the next three questions: Na, K, Ca, He, Fr
1. Rank these elements from largest atomic radius to smallest.
2. Rank these elements from most metallic to least metallic.
3. Rank these elements from least electromagnetic to most electromagnetic.
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An objects weight w is equal to the product of its mass and the acceleration due
to gravity. On Earth, this value is g = 9.8 m/s^2. If something weighs 400 N,
what is its mass?
Answer:hinwjdheiohuddwrr
87u7t
How does the direction of the force affect the direction of an object will travel?
it is car because it is away to travel
define the term work
Answer:
Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force
Explanation:
at least part of which is applied in the direction of the displacement. ... To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd.
Space explorers discover an 8.7 × 1017 kg asteroid that happens to have a positive charge of 4400 C. They would like to place their 3.3 × 105 kg spaceship in orbit around the asteroid. Interestingly, the solar wind has given their spaceship a charge of -1.2 C.
What speed must their spaceship have to achieve a 8300-km-diameter circular orbit?
We have that the speed of the spaceship must be
[tex]V=2.47m/s[/tex]
From the Question we are told that
Mass [tex]8.7*10^{17} kg[/tex]
Positive charge of 4400 C
Spaceship mass m_s=3.3* 10^5 kg
Solar wind has given their spaceship a charge of -1.2 C.
Diameter d=8300-km-diameter
Generally the equation for the force of attraction is mathematically given as
[tex]v^2=\frac{Gm}{r}+\frac{kQq}{rm}\\\\v^2=\frac{6.67*10^{-11}*8.7*10^{17}}{9.5*10^5}}+\frac{9*10^9*4400*-1.2}{9.5*10^5*3.3*10^{15}}[/tex]
[tex]V=2.47m/s[/tex]
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The speed will be "6.98 m/s". A complete solution is provided below.
The given values are:
Mass of asteroid,
M = [tex]8.7\times 10^{17}[/tex] kgMass of spaceship,
m = [tex]3.3\times 10^{5}[/tex] kgCharge,
[tex]q_1=4400 \ C[/tex][tex]q_2=1.2 \ C[/tex]As we know,
→ [tex]F_G +F_E = \frac{mv^2}{R}[/tex]
or,
→ [tex]\frac{GMm}{R_2} +\frac{kq_1 q_2}{R_2}=\frac{mv^2}{R}[/tex]
By putting the given values, we get
→ [tex]\frac{6.67\times 10^{-11}\times 8.7\times 10^{17}\times 3.3\times 10^5}{\frac{8.3\times 10^6}{2} } +\frac{9\times 10^9\times 4400\times 1.2}{\frac{8.3\times 10^6}{2} } = 3.3\times 10^5\times v^2[/tex]
→ [tex]v=6.98 \ m/s[/tex]
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10. What is a rule for determining the mass?
Answer:
Mass number is the sum of the protons and neutrons in the atomic nucleus.
The mass number (A) is the sum of the atomic number (Z), which is the number of protons, and the number of neutrons (N) in the atomic nucleus of an isotope of an element. A=Z+N
what is a law in physics? state the criteria for a statement to be a law.
Answer:
By nature, laws of Physics are stated facts which have been deduced and derived based on empirical observations. Simply put, the world around us works in a certain way, and physical laws are a way of classifying that “working.”
In Physics, a law can be defined as a type of scientific statement or statement of fact that is generally accepted to be true and universal because it has always been observed to be true.
Some examples of laws that are universally accepted include;
Law of Conservation of Momentum. Law of Conservation of Energy. Newton's First Law of Motion. Ohm's law.On a related note, the criteria that must be met for a statement to become acceptable as a law is that, it must be supported by observations and the results of control experiments.
Furthermore, the statement must give rise to factual or evidential information, theories and must proffer a solution to a particular problem.
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A submarine deep underwater releases a bubble of air. The total pressure at this depth is P. The bubble has diameter, D, and absolute temperature, T. As the bubble rises, it expands. When it reaches a certain smaller depth, where the total pressure is 0.22P, it has absolute temperature 1.17. In terms of D, what is the diameter of the bubble at this depth? You may assume that no air leaves the bubble, and that the air behaves as an ideal gas.
Answer:
P V = n R T ideal gas equation
P2 V2 / P1 V1 = T2 / T1
V2 / V1 = T2 / T1 * P1 / P2 = T2 P1 / (T1 P2)
V2 / V1 = (1.17 T1) / T1 * (P1 / .22 P1) assuming absolute temp as 1.17 P1
V2 / V1 = 1.17 / .22 = 5.32
V = 4/3 pi R^3 = 4/3 pi (D/2)^3 = 4/3 pi D^3 / 8 = pi D^3 / 6
V2 / V1 = D2^3 / D1^3
D2 = (V2 / V1 * D1^3)^1/3
D2 = 5.32^1/3 * D = 1.75 D (D1 = D)
Yo someone help me on dis jawnt rq plzzz!
Answer:
the answer is 45.6 kg = 45600 g
what type of welding equipment is commonly used in automotive shops?
Answer:The most common welding methods for automotive jobs include resistance metal inert gas (MIG) welding, plasma arc welding (PAW) and tungsten inert gas (TIG) welding. Learn more about MIG Welding and Other Common Welding Types.
There are various type of welding equipment that are commonly used in automotive shops.the most common form of welding used for automobiles are tungsten inert gas welding (TIG),metal inert gas welding(MIG) and shielded metal arc welding.
What is Shielded Metal Arc Welding (SMAW)?It is a type of manual arc welding process which utilizes a consumable electrode covered with flux to protect the weld bead.For SMAW either direct current or alternating current can be used to form the electric arc. The electrode melts and forms a molten weld pool with the base metal by using the thermal energy produced from the electric arc.The weld bead in Shielded metal Arc Welding is formed by the electrode wire core mixing with the molten base metal.
Auto body specialists perform structural repairs on a range of cars and equipment using a variety of automotive welding techniques. They might also create a metal part to enhance an existing building. The most popular welding techniques for automotive projects are tungsten inert gas (TIG), plasma arc, and resistance metal inert gas (MIG) welding.
Thus,There are various type of welding equipment that are commonly used in automotive shops such as Auto-Darkening Welding Helmet Welding Gloves, MIG Welding Pliers, Welding Magnets, Chipping Hammer,Welding,Framing Jig,Metal Brush,Angle Grinder,Metal File,Welding Boots,Safety Glasses and MIG Welding Nozzle Gel.
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what is heroism???
plz answer
Answer:
heroism is great bravery..
hope it helps !
