Given only a mass number, one can deduce the number of protons plus neutrons in each atom of an element and is denoted as option A.
What is Mass number?This is also referred to as the nucleon number which is the total number of protons and neutrons in the atom of an element.
Protons are referred to as the positively charged subatomic particles which are present in a atom while the neutrons are subatomic particles which are neutral and the both of them make up the nucleus of an atom.
This is therefore the reason why proton plus neutron was chosen as the most appropriate choice.
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The options are:
a) protons plus neutrons
b) neutrons
c) protons
d) electrons
e) protons plus electrons
An object moving along the x axis experiences an acceleration of 7.0 m/s2. this means the object is:_________
This means the object is increasing its velocity by 7.0 m/s in every second.
What is acceleration?Acceleration: the rate at which the speed and direction of a moving object vary over time. A point or object going straight ahead is accelerated when it accelerates or decelerates. Even if the speed is constant, motion on a circle accelerates because the direction is always shifting.
The meter per second per second (m/s2) unit of acceleration. The square meter is a measure of area (m2). The equation a = v/t denotes acceleration (a), which is the change in velocity (v) over the change in time (t).
This enables you to calculate the change in velocity in meters per second squared (m/s2). Since acceleration is a vector quantity, both its magnitude and its direction are included.
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What is true about an object as its temperature increases?a. the object's atoms lose heat. b. the object's atoms gain kinetic and elastic potential energies. c. the object's atoms gain heat.
When temperature of an object is increases then the objects atom gain kinetic energy and elastic potential energies.
Kinetic energy- It is the energy of an object due to its motion.
Example - All moving object possesses kinetic energy due to their motion.
Elastic potential energy - it is the energy stored in a spring that has been stressed or compressed from its natural length.
Example - An Archers stretched bow.
Heat is a form of both potential and kinetic energy.
Temperature helps in thermal expansion which result in higher collision between particles. It increases the kinetic energy of the molecule.
an object as its temperature increases then the object's atoms gain kinetic and elastic potential energies.
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Before telemedicine can deliver high-quality medical services at a distance, ______.
Before telemedicine to provide high-quality medical treatments remotely, a dependable broadband telecommunications network must be established, and licensing obstacles in the states must be removed.
What is the definition of telemedicine?Telemedicine is the delivery and support of healthcare services over long distances using electronic information and communication technology. Distance is denoted by the Greek term "tele," and healing is denoted by the Latin word "mederi." Telemedicine can improve patient access to healthcare services, cut healthcare expenses, increase efficiency and income, and ultimately result in patients who are happier and healthier and stay with your organization. Store-and-forward, remote monitoring, and real-time interactive services are the three primary categories of telemedicine. Each of these plays a positive role in overall healthcare and, when used appropriately, can provide real advantages for both patients and healthcare professionals. Enhancing overall patient outcomes ought to be telemedicine's main objective.
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What two principal factors affect the force of air resistance on a falling object?.
First, it depends on the cross-sectional/frontal area of the falling object, that is the amount of air the object must plow through as it falls. Second, it depends on the speed of the falling object.
When an object is dropped through the air, it usually faces air resistance. Air resistance is caused by collisions between the object's leading air and surface molecules. Several variables determine the actual degree of air resistance the object faces. The object's speed and the frontal area of the object are the two predominant factors that have a direct effect on the amount of air resistance. Increased speeds cause an increase in air resistance. Increased cross-sectional areas lead to increased air resistance.
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Why is it important to center an object you are analyzing in the field of view of the microscope before switching to a higher power lens?
As magnification increases, field diameter decreases and objects at the periphery will no longer be in the visible field.
What is Lens ?A lens is a piece of transparent material that is typically round in shape with two polished surfaces that are either convex (bulging) or concave on one or both sides (depressed). The curves almost always have a constant radius of curvature since they are spherical.
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With an increase in strain rate, ductility ______ and tensile strength _____. a) decreases, decreases b) decreases, increases c) increases, increases d) increases, decreases
With an increase in strain rate, ductility decreases and tensile strength increases. Option b. decreases, increases is the correct answer
The ductility of materials decreases as the strain rate rises. The reason is that the material exhibits brittle behaviour. Material increases in tensile strength.
Ductility: A material's ductility refers to its capacity to withstand plastic deformation or drawing without breaking. As a result, it provides information on how "soft" or pliable the material is.
Tensile strength: Maximum load a material can bear without breaking when it is stretched, divided by the material's initial cross-sectional area.
Therefore, option b. is the correct answer for the given question
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What is the average rate from 2.0 to 6.0 seconds in mol / l s? use 4 decimal places
The average rate from 2.0 to 6.0 seconds in mol/L is 0.004025 mol/L.
What is decomposition reaction ?Decomposition reactions are those in which a reactant undergoes reaction to form two or more products.
2AX2(g) -------> 2AX(g) + X2(g)
t1 = 2.0 s and t2 = 6.0 s
x1 = 0.0249 and x2 = 0.0088
Average rate of reaction:
Ra = ∆[x]/DeltaT = X2 - X1/t2 - t1
Ra = 0.0088 - 0.0249/6 - 2 = 0.004025 mol
Thus, the average rate is 0.004025 mol/L.
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Cascading style sheet rules are comprised of: ________
a) elements and attributes
b) selectors and declarations
c) selectors and attributes
d) properties and declarations
Cascading style sheet(CSS) rules are comprised of selectors and declarations.
What is Cascading style sheet?When describing the display of a document published in a markup language like HTML or XML, Cascading Style Sheets (CSS) is the language utilized (including XML dialects such as SVG, MathML or XHTML). Along with JavaScript and HTML, CSS is a key component of the World Wide Web. Layout, color, and font customization are all possible with CSS, which is made to separate display from content. By defining the pertinent CSS in a separate file, this separation can make content more accessible, give definition of presentation characteristics more freedom and control, and allow numerous web pages to share formatting.
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A block has a mass of 4.726 g and a volume of 128.9 cm3. calculate the density in g/cm3
The density of the block is 0.036 g / [tex]cm^{3}[/tex]
We know that,
Density = Mass / Volume
Given that,
Mass = 4.726 g
Volume = 128.3 [tex]cm^{3}[/tex]
Density = 4.726 / 128.3 = 0.036 g / [tex]cm^{3}[/tex]
Density is defined as the unit mass per unit volume. It is represented using ρ.
Therefore, the density of the block is 0.036 g / [tex]cm^{3}[/tex]
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A beam of blue light in air is incident on a glass plate. will the beam transmitted through the glass plate emerge parallel to the incident beam?
If the top and bottom surfaces of the glass plates are parallel to each other, the incident and emergent beam will be parallel to each other no matter the wavelength (colour) of beam.
CASE 1 : The surface in which the beam is incident is parallel to the surface from which the beam is emitted. In this case, the incident and emergent ray are always parallel to each other no matter the wavelength (colour) of beam.CASE 2 : The surface in which the beam is incident is not parallel to the surface from which the beam is emitted. In this case, the incident and emergent ray are not parallel to each other.Refractive index is the lights bending ability when moving from one medium to another. Refractive index varies with colours but not angle of incidence and emergence.
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According to equation 11.22, the energy is inversely proportional to the square of the length of the box. how would you account for this dependence in terms of the heisenberg uncertainty principle?
Equation 11.22
[tex]E = \frac{n^{2}*h^{2} }{8ML^{2} }[/tex]
Heisenberg's uncertainty principle states that the position and momentum of microscopic moving particles cannot be determined simultaneously with accuracy or certainty.
Mathematical expression- ΔX×ΔP [tex]\geq[/tex] 4πh.
Momentum can be defined as the product of mass of the body and its velocity.
According to the equation 11.22, Energy (E) is depends upon the position (h) and mass (M) and also it is inversely proportional to the square of the length of the box (L), therefore it is not possible to calculate the exact value of energy using the above equation.
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Describe and give an example of the 4 main States of Matter, including how SHAPE and VOLUME are AFFECTED IN EACH STATE, and how each state is related to the major -Spheres of the EARTH.
The four main states of matter are Solids, liquids, gases and plasma and the fifth one is man-made Bose-Einstein condensates.
What is States of Matter?The state of the substance is one of the characteristic forms that the many phases of the matter take. The four states of matter that can be encountered in daily life are solid, liquid, gas, and plasma. It is believed that many other states can only be found in extremely cold or dense matter, including the Bose-Einstein condensate and neutron degenerate matter. Quark-gluon plasmas are among the other conceivable states that are currently thought to be hypothetical.
The states that can exist inside the gadget are gaseous, liquid, or solid. A solid can be identified by its hard form, strong atomic bonds, and high viscosity. Insofar as they have a three-dimensional periodic atomic structure, most solids are crystalline; nevertheless, some solids (like glass) lack this periodic arrangement and are non-crystalline or amorphous instead.
According to the question,
The solid is densely packed with particles. The forces between the particles are so strong that they are only able to vibrate and not move freely. The solid as a result has a steady, distinct shape as well as a specific volume.
A liquid is a nearly incompressible fluid with a constant volume regardless of the pressure that adapts to the shape of its container. If both temperature and pressure are constant, volume is defined. When a solid is heated over its melting point, it turns liquid because the pressure exceeds the material's triple point.
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A solution is made by mixing 27.g of chloroform chcl3 and 55.g of acetyl bromide ch3cobr. calculate the mole fraction of chloroform in this solution. round your answer to 2 significant digits.
The Mole fraction of Chloroform in this solution is 0.336
We know that,
Mole Fraction of Chloroform = No. of moles of Chloroform / Total number of moles of the solution
No. of moles = Mass / Molar mass
Given that,
Mass of Chloroform = 27g
Mass of Acetyl bromide = 55g
Molar mass of Chloroform = 119.38 g/mol
Molar mass of Acetyl Bromide = 122.95 g/mol
No. of moles of Chloroform = 27 / 119.38 = 0.226 moles
No. of moles of Acetyl Bromide = 55 / 122.95 = 0.447 moles
Total no. of moles = 0.226 + 0.447 = 0.673 moles
Mole fraction of chloroform = 0.226 / 0.673 = 0.336
In a solution containing at least 2 components, the number of moles of one component divided by total number of moles in that solution is called Mole fraction.
Therefore, the Mole fraction of Chloroform in this solution is 0.336
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At what point on a line through the ends of the meter stick is the electric field equal to zero?
The point on a line through the ends of the meter stick is the electric field equal to zero is 4.7 m from the 0 cm mark.
What is electric field?An electric field is the physical field that surrounds the electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It also refers to physical field for a system of charged particles. Electric fields originate from the electric charges and time-varying electric currents. Electric fields and the magnetic fields are both manifestations of the electromagnetic field, one of the four fundamental interactions (also called forces) of nature.
Electric fields are important in many areas of the physics, and are exploited in electrical technology. In atomic physics and chemistry, for the instance, the electric field is the attractive force holding the atomic nucleus and electrons together in atoms. It is also force responsible for chemical bonding between atoms that result in molecules.
The electric field is defined as a vector field that associates to each point in the space the (electrostatic or Coulomb) force per unit of charge exerted on an infinitesimal positive test charge at rest at that point. The derived SI unit for electric field is the volt per meter (V/m), which is equal to the newton per coulomb (N/C)
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The correct question will be:
"A +5.00-μC point charge is placed at 0.0 cm mark of meter stick and a -4.00-μC point charge is placed at 50.0 cm mark. At what point on a line through the ends of meter stick is electric field equal to zero?"
The electrons lost from chlorophyll photooxidation are replaced by the oxidation of water. how many electrons are generated from the oxidation of one water molecule?
There are 2 electrons generated from the oxidation of one water molecule.
Describe photooxidation.The process of a substance interacting with oxygen or losing electrons from chemical species under the influence of light is known as photooxidation. Photooxidation happens in plants when there is environmental stress. It is called photooxidative stress as a result. Reactive oxygen species are produced by the absorption of excess excitation energy in plant tissues. Chloroplasts are harmed by the accumulation of these reactive oxygen species, which is a damaging process in plants. High-intensity light and little [tex]CO_{2}[/tex] are the two conditions that cause this photooxidative stress to occur most frequently. It is a procedure that requires light. Photorespiration in [tex]C_{3}[/tex] plants guards against photooxidation.
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A body is projected vertically upwards with a speed 100 m/s from the ground then distance it covers in its last second of its upward journey in meters is
The distance travelled by the body on last second of its upwards journey is 4.935m
What is projectile motion?
A projectile is an object or particle that is launched toward the surface of the Earth and moves along a curved path only under the influence of gravity.
To solve this question, consider the horizontal distance to be H and
distance traveled by the body in the last second be d
[tex]H=U^{2} /2g[/tex]
[tex]H=100^{2} /2*9.8[/tex]
H=510.2m
Now time taken to reach a height of
510.2 m= [tex]\sqrt[n]{2H/g}[/tex]
=10.2 seconds
Now,
[tex]s=ut+1/2gt^{2}[/tex]
[tex]H-d= (100)(t-1)-1/2g(t-1)^{2}[/tex]
[tex]510.2-d=100*9.2-1/2*9.8*9.2^{2}[/tex]
d=4936m
So, the correct answer is '4.936m'.
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at a time t after being projected from the ground, a projectile is displaced x units horizontally and y units vertically above its point of projection. (use any variable or symbol stated above along with the following as necessary: g for the acceleration due to gravity.)
The vertical component of the initial velocity is [tex]v_{0y}[/tex] = ( y / t ) + [ ( 1/2) gt ]
The horizontal component of the initial velocity is [tex]v_{0x}[/tex] = x / t
We know that,
x = [tex]v_{0x}[/tex] t
y = [tex]v_{0y}[/tex] t - ( 1/2) g[tex]t^{2}[/tex]
where,
x = Horizontal displacement of the object
y = Vertical displacement of the object
g = Acceleration due to gravity
t = Time of motion
For horizontal motion there is constant velocity and for vertical motion there is uniform acceleration.
The vertical component of the initial velocity is given as
y = [tex]v_{0y}[/tex] t - ( 1/2) g[tex]t^{2}[/tex]
[tex]v_{0y}[/tex] t = y + ( 1/2) g[tex]t^{2}[/tex]
[tex]v_{0y}[/tex] = ( y/t ) + ( 1/2 ) gt
The horizontal component of the initial velocity is given as
x = [tex]v_{0x}[/tex] t
[tex]v_{0x}[/tex] = x / t
A projectile motion is the motion of an object thrown in air at some angle with the horizontal.
Therefore,
The vertical component of the initial velocity is [tex]v_{0y}[/tex] = ( y / t ) + [ ( 1/2) gt ]
The horizontal component of the initial velocity is [tex]v_{0x}[/tex] = x / t
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I WILL AWARD BRAINLY FOR THE CORRECT ANSWER QUICKLY
What is the highest speed during the motion.
Answer: 20mm/s
Explanation: Maximum displacement in shortest time....
Suppose that the marginal propensity to save (mps) equals 0.2. the value of the multiplier would be:_________
0.2 is the value of the marginal propensity to save (mps). The multiplier's value would be 5.
Briefing:
Multiplier = 1 / marginal saving propensity (MPS)
= 1 / 0.2
= 5.
What does marginal propensity mean?The percentage of an overall salary increase that a customer spends on purchasing goods and services rather than saving is known as the marginal propensity to consume (MPC) in economics.
How is marginal propensity determined?By dividing the change in consumer spending (C) by the change in disposable income (I), the MPC formula is created. Formula for the marginal propensity to consume is (C1 - C0) / (I1 - I0), where C0 is the initial amount spent by consumers.
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The sun has a surface temperature of approximately 5800 k. at what wavelength does the maximum energy radiated by the sun occur?
wavelength at the maximum energy radiated by the sun is
499× 10⁻⁹m (499nm)
wavelength at the maximum energy radiated by the sun occur measure by:
wien's displacement law : The black body radiation at a wavelength is inversely proportional to temperature.
acc. to wien's displacement law
λ= b/T
λ is wavelength
where T is the temperature
The sun has a surface temperature of approximately 5800 k.
b is constant of proportionality
b = 2.8977×10⁻³mk
T = 5800k
using values in above equation
λ = 2.8977 × 10⁻³ mk/ 5800k
λ= 499× 10⁻⁹m =499nm
wavelength at the maximum energy radiated by the sun is
499× 10⁻⁹m =499nm
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I need some serious help, i do not understand this question!!
An Alaskan rescue plane traveling 47 m/s
drops a package of emergency rations from
a height of 179 m to a stranded party of
explorers.
The acceleration of gravity is 9.8 m/s^2
Where does the package strike the ground
relative to the point directly below where it
was released?
Answer in units of m.
The position where the package strikes the ground is 136.3m.
Time of motion of the package
Use the following kinematic equation;
h = vt + ¹/₂gt²
179 = 47t + ¹/₂(9.8)t²
179 = 47t + 4.9t²
4.9t² + 47t - 179 = 0
solve the quadratic equation using formula method;
a = 4.9, b = 47, c = -179
t = 2.9 seconds
Horizontal distance traveled by the packageX = vt
X = 47m/s x 2.9 s
X = 136.3 m
Thus, the position where the package strikes the ground is 136.3m.
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How many moles of disulfur decafluoride are present in 3.46 grams of this compound?
Moles of disulfur decafluoride are present in 3.46 grams of this compound is 0.025 mol
There are 6.022 x 10^23 S2F10 units in one mole
There are 6.022 x 10^23 S2F10 units in one mole of the stuff by definition.
And thus 1.55 x 10^22 molecules/6.022 x 10^23 molecules mol^-1 =~ 0.025 mol
S2F10 is nasty stuff, though apparently it is quite odourless (this is a "good" property in a war gas, because some punter might get a lethal dose of it before he realizes he has been gassed; the substance has never been deployed in war).
What are moles ?A mole can be defined as the amount of substance that contains the same number of chemical entities (atoms, ions, molecules, etc.) as there are in 12 g of Carbon-12 isotope, as defined by the General Conference on Weights and Measures.
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Voltage drop is a better measurement of resistance than testing static resistance because ________.
Voltage drop is a better measurement of resistance than testing static resistance because: current flow creates heat which adds to circuit resistance
The current flow or electric current is the measure of the electrons flow around a circuit. It is measured in amperes or "amps". If the current is higher the electrons flow is greater.
The course of a conventional electric current in the external circuit is directed away the positive terminal and toward the negative terminal of the battery
What is electricity?Electricity or electrical energy is the energy that occurs due to the movement of electrons in the materials that are considered conductors.
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In a first order decomposition, the constant is 0.00711 sec-1. what percentage of the compound is left after 6.07 minutes?
32.9%, is the percentage of compound left after 6.07 minutes.
We utilize the equation A(t) = A0e-kt for decomposition, where A0 is the beginning amount of the decomposed substance at time t = 0, k is the decay constant, t is the passing of time, and A(t) is the amount at the end of time t.
The original amount, [A0], multiplied by 100 to get [A(t)], or A/A0*100, is the fraction of the decomposed molecule that is still present after time t:
A = A0e-kt
Divide both sides by A0, k = 0.00299, and A/A0 = e-0.00299t.
A/Ao is equal to e-0.00299*372, where
t = 6.2 min*(60 sec/ 1 min)
= 372 sec.
A/A0 = .3288 = 32.9%,
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A typical galaxy contains 100 billion stars. express this in scientific notation.
A typical galaxy contains 100 billion stars - its scientific notation is x 10^11 stars.
What is typical galaxy?A world is a gravitationally bound arrangement of stars, heavenly leftovers, interstellar gas, residue, and dim matter. The word is gotten from the Greek galaxias, in a real sense 'smooth', a reference to the Smooth Way world that contains the Planetary group. Cosmic systems, averaging an expected 100 million stars, range in size from diminutive people with under a hundred million stars, to the biggest worlds known supergiant's with one hundred trillion stars, each circling its universe's focal point of mass. Our world, the Smooth Way, is normal: it has many billions of stars, enough gas and residue to make billions additional stars, and somewhere around tenfold the amount of dull matter as every one of the stars and gas set up. Also, it's completely kept intact by gravity. Like more than 66% of the known universes, the Smooth Way has a twisting shape.
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An airplane moving horizontally at 150m/s drops a package from an altitude is 490m. how long does it take the package to reach the ground? how far horizontally from the spot over which it was dropped does the package land?
1. If John can walk with a speed of 4 meters per second. How far will John walk if he walks for 1 hour and 30 minutes.
Answer:
21 600 m
Explanation:
4 m/s * 3600 s / hr * 1.5 hr = 21 600 m
Can and object have a negative position and a positive velocity? Or vice versa, a positive position and a negative velocity? Explain your reasoning, do not just give a simple sentence answer.
A drop in room temperature to 65of that causes the heater to turn on provides an example of a(an):_______
Answer:
stimulus
Explanation:
A car with good tires on a dry road can decelerate at about 3.0 m/s2 when braking. if the car is traveling at 65 km/h, what distance is needed to stop at the red light?
By using uniform motion, the distance needed to stop at the red light is 54.36 m.
We need to know about the uniform motion to solve this problem. The uniform motion is an object's motion under acceleration. It should follow the rule
vt = vo + a . t
vt² = vo² + 2a . s
s = vo . t + 1/2 . a . t²
where vt is final velocity, vo is initial velocity, a is acceleration, t is time and s is displacement.
From the question above, we know that
a = -3 m/s²
vo = 65 km/h = 18.06 m/s
vt = 0 m/s
By using the second equation, we get
vt² = vo² + 2a . s
0² = 18.06² + 2(-3) . s
6s = 326.16
s = 54.36 m
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