Answer:
1. 61 neutrons - Promethium - Pm
2. 126 neutrons - Unbihexium - Ubh
3. 2 neutrons - Helium - He
4. 32 neutrons - Germanium - Ge
5. 110 neutrons - Tungsten - W
6. 45 neutrons - Bromine - Br
7. 121 neutrons - Mercury - Hg
8. 146 neutrons - Uranium - U
Explanation:
I Don't know how to explain, but I hope that this helped You.
The total mechanical energy of a basketball is 450 J. If the kinetic energy is 226 J, what must the potential energy be?
Answer:
224 J
Explanation:
The total energy is equal to 450 J and the kinetic energy is equal to 226 J so to find the potential energy you simply subtract the two numbers
Suppose that a large mixing tank initially holds 300 liters of water in which 50 kg of salt have been dissolved. Another brine solution, with a concentration of 250 g/L, is pumped into the tank at a rate of 5 L/min, and the tank is also being emptied at a rate of 5 L/min. The fluid in the tank is being constantly stirred, and we can assume that, at any moment, the concentration is uniform throughout the tank. If A(t) represents the amount of salt (in kg) in the tank at time t, find a first-order differential equation for A(t), and write down the initial condition that goes with this equation.
Answer:
[tex]\therefore \quad \frac{d A}{d t}=6-\frac{2 A(t)}{300+t}[/tex]
Explanation:
[tex]\because \quad \frac{d A}{d t}=R_{i n}-R_{\text {out }}[/tex]
Thus, we find [tex]R_{i n}$ and $R_{\text {out first }}[/tex]
[tex]\because R_{i n}=( concentration of salt in inflow ) \cdot[/tex] (input rate of brine)
[tex]\therefore \quad R_{i n}=(2 \mathrm{lb} / \mathrm{gal}) \cdot(3 \mathrm{gal} / \mathrm{min})=6 \mathrm{lb} / \mathrm{min}[/tex]
Since the solution is pumped out at a slower rate, thus it is accumulating
at the rate of [tex](3-2)=1 \mathrm{gal} / \mathrm{min}[/tex]
Thus, after t minutes there will be [tex]300+t[/tex] gallons in tank
[tex]\because R_{\text {out }}=[/tex] (concentration of salt in outflow) \cdot (output rate of brine)
[tex]\therefore \quad R_{o u t}=\left(\frac{A(t)}{300+t} \mathrm{lb} / \mathrm{gal}\right) \cdot(2 \mathrm{gal} / \mathrm{min})=\frac{2 A(t)}{300+t} \mathrm{lb} / \mathrm{min}[/tex]
Now, we substitute by these results in the [tex]\mathrm{DE}[/tex] to get
[tex]\therefore \quad \frac{d A}{d t}=6-\frac{2 A(t)}{300+t}[/tex]
what happens to the sum of the balls kinetic energy and potential energy as the ball's roll from point A to point E assume theres is no friction between the ball and the ground
Answer:
The sum remains the same.
Explanation:
the question is incomplete, but I got this because i have done this before.
Answer:
The sum remains the same.
Explanation:
yes it will remain t he same and not change may i be marked brainliest?
What are the names of the days when day and night are of equal duration?
If a dancer's breathing is deep and rapid after performing a folk dance,what is the intensity of his activity?
Answer:
Moderately Light
Explanation:
Dancer breathing deeply and rapid after performing a folk dance is moderately light kind of activity intensity.
Other examples of moderately intense exercise include brisk walking, hiking, playing tennis, pushing a lawn mover and water aerobics.
Moderately Intensity activities are those which allow you to move quickly or hard enough to consume three to six times more energy every minute than when you sit still.
The activity in which the performer of the folk music is involved is a moderately intense activity.
A folk dance is an activity in which the performer moves briskly and moves the body rapidly. It is a mildly vigorous activity hence the breathing rate of the performer increases slightly.
Hence, we can say that the activity in which the performer of the folk music is involved is a moderately intense activity.
Learn more about activities:https://brainly.com/question/1195122
Some people say you can get HIV from insect bites. True or false? Why?
Answer:
It is not possible to get HIV from insect bites.
Explanation:
They don't inject the blood of the last person they bit. HIV is spread through the exposure of blood.
What kind of energy does an unlit match have?
a. thermal energy
b.chemical energy
c. kinetic energy
The type of energy that an unlit match has is potential energy.
1 point glitch if it works
you get half the points you answer a question, but what if i put it to 11, will both of you get 6 pts?
Answer:
lets see :)
Explanation:
Answer:
yes I think so. ..................
PLEASE HELP AS SOON AS POSSIBLE!!!
A car approaches a hill at a speed of 40 m/s. When it reaches the base of the hill it runs out of gas and has to coast up the hill. Assuming that there is no friction, at what height
will the car come to rest?
Answer:
h = 81.63 m
Explanation:
Given that,
The speed of the car, v = 40 m/s
We need to find the height when the car comes to rest. We can use the conservation of energy to find it i.e.
[tex]mgh=\dfrac{1}{2}mv^2\\\\h=\dfrac{v^2}{2g}\\\\h=\dfrac{(40)^2}{2\times 9.8}\\\\h=81.63\ m[/tex]
So, it will reach to a height of 81.63 m and comes to rest.
1. Mass is 50 kg and velocity is 5 m/s.
Answer:
50*5=250KG*M/S
Explanation:
P=M*V
MOMENTUM FORMULA
What type of solar eclipse occurs when the moon is in a higher orbit than the sun ?
Answer:
annular solar eclipse
Explanation:
An annular solar eclipse happens when the Moon covers the Sun's center, leaving the Sun's visible outer edges to form a "ring of fire" or annulus around the Moon. It happened because the apparent size of the Moon is smaller than that of the Sun
Answer:
annular solar eclipse
Explanation:
a solar eclipse happens when the moon covers the sun centre
Create a timeline: WHAT WOULD SOME EXAMPLES OF EACH PART BE??
Include at least the four major scientists covered in this unit: Oersted, Ampère, Faraday, and Tesla.
Include key contributions of each scientist and provide a year, if possible, for those contributions.
Note any relationships among these and other scientists, especially if one developed something based on the work of another.
Arrange the scientists chronologically by their first key contribution, not by their birth date.
Answer:
I tried and could not understand it sorry
Explanation:
describe what happen as one complete sound wave move past a point?
Answer: The air is compressed after the sound wave passes. 4. The density of air increases and then decreases as the sound wave passes.
Explanation:
what is pressure and force
Calculen si a nivel del mar se reciben del sol 1000 watts por metro cuadrado y un panel solar genera 200 watts, ¿Cuál es la diferencias.?
Answer:
Diferencia de energía de las dos fuentes = 800 watts
Explanation:
Cantidad de energía recibida en el mar = 1000
Cantidad de energía solar recibida en el mar = 200
Diferencia de energía de las dos fuentes = 1000 -200 = 800 watts
round off 3.647
correct two decimal places
correct the nearest whole number
Explanation:
Rounding off 3.647 to 2d.p (2 decimal places)
= 3.65(please use the curly equal)
Rounding off 3.647 to whole number
= 4 (Same thing, since 3.6 is more than 3.5)
A car sets off from the traffic lights. It reaches a speed of 27 m/s in 18 seconds. What is its acceleration?
Answer:
1.6875m/s²
Explanation:
[tex] acceleration = \frac{final \: velocity \: - \: initial \: velocity}{time \: taken} [/tex]
a = unknown.
v (final velocity) = 27m/s
u (initial velocity) = 0m/s (as the car was stationary in the traffic lights).
t (time taken) = 18s
[tex]a = \frac{27 - 0}{16} [/tex]
acceleration = 1.6875m/s²
hope it helps. :)
6. The speed of sound waves in air is 330 m/s. A sound wave has a frequency of 750 Hz.
a. What is its wavelength as it travels through air?
b. What is its period?
Answer:
Wavelength = 0.44 meter
Time period = 0.0013 seconds
Explanation:
Given:
Speed of sound = 330 m/s
Frequency = 750 Hz
Find:
Wavelength
Time period
Computation:
Wavelength = Velocity / Frequency
Wavelength = 330 / 750
Wavelength = 0.44 meter
Time period = 1 / Frequency
Time period = 1/750
Time period = 0.0013 seconds
How would the gravity forces change if the Earth and Sun were moved far apart? Increase, stay the same, or decrease.
But on an orbital sense, the gravitational force between two objects depends on the mass of both the larger and the smaller object. ... The pull between Earth and Sun grows weaker, and the planets would drift farther from the Sun, spending much more time at much greater distances from the Sun.
If you get scared when swimming,panicking just makes you breathe faster and uses up more precious energy.
A. True
B.Flase
ANSWER ASAP
(No links, if you aren’t gonna answer here don’t answer at all.)
Which of the following statements are true about whether atoms tend to gain
or lose electrons?
A. Atoms with one, two, or three valence electrons will lose
electrons.
B. Atoms with five, six, or seven valence electrons will lose
electrons.
C. Atoms with four valence electrons will always gain electrons.
D. Atoms with eight valence electrons usually do not gain or lose
electrons.
Answer:
D. Atoms with eight valence electrons usually do not gain or lose
electrons.
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such defines the structure of a chemical element.
Generally, these atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Based on the octet rule which states that atoms of chemical elements gain, lose or share electrons so as to have eight (8) electrons in their valence shell. Therefore, atoms of chemical elements bond in order to attain the electronic configuration of a noble gas i.e a full valence shell which comprises of eight (8) electrons.
This ultimately implies that, atoms with eight valence electrons usually do not gain or lose electrons because they're noble gas.
All the different habitats in our world make up
biodiversity
ecosystem diversity
O genetic diversity
species diversity
Answer:
All the different habitats in our world make up biodiversity
Explanation:
Biodiversity is the sum of different species in life. With different species, it's diverse because it's more than one type.
Hope this helped!
Answer:
Ecosystem Diversity.
Explanation:
Please help I'll give brainliest!!
Is sound energy a potential energy or a kinetic energy? Does it involve the motion of something or the location of something? Explain.
Answer:
sound energy is form of mechanical energy.Sound travels as waves of energy, but, unlike light, the waves transmit energy by changing the motion of particles. ... That means that each individual particle is only moving a short distance.
What is created when a solute and solvent combine?
A.compound
B.element
C.solution
D.molecule
Answer:
a compound
Explanation:
a compound
hope this helps
PLS HELP MEEEE (NO LINKS PLEASE)
The difference between visible light and gamma rays is that
a.
the amplitude of visible light is greater.
c.
they travel through a different medium.
b.
the speed of gamma rays is greater.
d.
the frequency of gamma rays is greater.
Answer:
D. the frequency of gamma rays is greater.
Explanation:
Gamma rays occupy the short-wavelength end of the spectrum; they can have wavelengths smaller than the nucleus of an atom. Visible light wavesare one-thousandths the width of human hair--about a million times longer than gamma rays. Radio waves, at the long-wavelength end of the spectrum, can be many meters long.
HAVE A WONDERFUL REST OF THE DAYYYY! :3
What does the "coefficient of friction" tell you?
Write 3 diseases name caused by air pollution.
Answer:
The most common diseases caused by air pollution include ischemic heart disease, stroke, chronic obstructive pulmonary disease (COPD), lung cancer and acute lower respiratory infections in children. Particulate air pollution has been linked with strokes, which occur when the blood supply to the brain is cut-off.
Air pollution has resulted in several respiratory disorders and heart diseases among humans. The cases of lung cancer have increased in the last few decades. Children living near polluted areas are more prone to pneumonia and asthma. Many people die every year due to the direct or indirect effects of air pollution.
40% – ischaemic heart disease.
40% – stroke.
11% – chronic obstructive pulmonary disease.
6% - lung cancer.
3% – acute lower respiratory infections in children.
Answer:
ischaemic heart disease. Stroke. chronic obstructive pulmonary disease.
lung cancer.
Another example of square-root relationships is the relation between the speed of a wave along a string under tension and the tension itself. Suppose you hold one end of a string and attach the other end to a wall. If you hold the string taut, and wiggle the free end up and down, a wave travels along the string. If the tension in the string is 9 N, the wave travels along the string at 6 m/s; if the tension in the string is 36 N, the wave speed along the string is 12 m/s. If the tension in the string is increased to 81 N , how fast will you expect a wave to travel along the string if you wiggle its free end
Answer:
The right answer is "18 m/s".
Explanation:
The given values are:
Velocity,
V = 6 m/s
Tension,
T = 9 N
As we know,
⇒ [tex]V=(\frac{T}{u})^{\frac{1}{2}}[/tex]
On substituting the given values, we get
⇒ [tex]6=(\frac{9}{u} )^{\frac{1}{2}}[/tex]
⇒ [tex]36=\frac{9}{u}[/tex]
⇒ [tex]u=\frac{9}{36}[/tex]
⇒ [tex]=\frac{1}{4}[/tex]
Now,
For 81 N the velocity will be:
⇒ [tex]v=(\frac{81}{(\frac{1}{4} )} )^{\frac{1}{2} }[/tex]
⇒ [tex]=18 \ m/s[/tex]
Oersted found the direction of the magnetic field around a wire carrying current by placing a (fill in the blank)
in many places
around the wire.
Answer: he used a compass to find the direction of the magnetic field
If you go twice as fast, your kinetic energy becomes.
A.2 times smaller
B.4 times smaller
C.2 times bigger
D.4 times bigger
Answer:
2 times bigger
Explanation:
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