Answer:
False.
Explanation:
The air resistance is a special type of frictional force that acts upon objects as they travel through the air. The force of air resistance is often observed to oppose the motion of an object. This force will frequently be neglected due to its negligible magnitude (and due to the fact that it is mathematically difficult to predict its value). It is most noticeable for objects that travel at high speeds (e.g., a skydiver or a downhill skier) or for objects with large surface areas.
Answer: false
Explanation: air resistance is a type of frictional force!
full explanation:
Air resistance force is the force of air pushing against a moving object. Air resistance (also called drag) is a type of frictional force. Like all frictional forces, the force of air resistance always opposes the motion of an object. Usually, the air resistance force is not very strong.
Please let me know if i'm wrong! :))
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.
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.
(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.
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
Explain why pots and pans are made of metal but the handles are made of plastic
Answer:
The handels are plastic because plastic is not a conductor of heat. This way, the plastic prevents u from getting burnt/hurt.
Explanation:
:)
Answer:
because the stove is hot and it's made out of metal so if they made the handles metal you could not even have use pots , they put plastic handles because they don't want us to get burned
1. Mass is 50 kg and velocity is 5 m/s.
Answer:
50*5=250KG*M/S
Explanation:
P=M*V
MOMENTUM FORMULA
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
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. ..................
The principle of inertia tells us that a rock sitting on a flat driveway will only move if a force is applied to it. True False
Answer:
True
Explanation:
Because that's what the law of inertia does
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. :)
What are the names of the days when day and night are of equal duration?
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.
HELP PLEASE ASAP !!!!Question 5 of 15
Lead-196 has a half-life of 37 minutes. It decays into thallium-196. Suppose a
sample contains 20 atoms of lead-196 and 60 atoms of thallium-196. About
how old is the sample?
A. 74 minutes
O B. 37 minutes
O c. 111 minutes
O D. 148 minutes
Answer: A. 74 Minutes
Explanation: A P E X
If you get scared when swimming,panicking just makes you breathe faster and uses up more precious energy.
A. True
B.Flase
ANSWER ASAP
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
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)
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]
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:
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
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.
What are 5 different ways to use a fidget spinner?
Answer:
Balancing on one finger.
Tossing between hands.
Using a different body part.
Building a tower.
Throwing it high in the air.
Flipping it over.
Switching between fingers.
Going behind the back.
Explanation:
Just stuff I used to do ^^
Which direction will the object move?
Answer: it will move to the left
Explanation: i remeber doing this
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
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 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
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:
If two capacitors, A and B, have the same area and dielectric constant, but the distance between the plates of A is twice the distance between the plates of B, which has the higher capacitance? Explain your answer.
Answer:
Plate B will have a higher capacitance
Explanation:
One of the conditions affecting the capacitance of a capacitor is spacing between plates, the greater the spacing the lesser the capacitance and vice versa.
Hence plate B will have the B will have higher capacitance since the spacing is less when compared with that of plate A
plate B has the higher capacitance because plate A has a higher distance.
Capacitance is the ability of a component or circuit to collect and store energy in the form of an electrical charge. It is given by:
The capacitance (C) of a parallel plate capacitor with two plates of area A separated by a distance (d) and no dielectric material between the plates is:
C = εA/d
ε is the permittivity.
For plate A:
C = εA/2d = 0.5εA/d
For plate B:
C = εA/d
Therefore plate B has the higher capacitance.
Find out more on capacitance at: https://brainly.com/question/24927491
please help !!! HELP
In the decay shown by this equation what shows that transmits transmutation has taken place?
A) atomic identity stays the same but the total number of protons and neutrons change
B) The element represented by the parent and daughter nuclei are the same
C) atomic identity change it but the total number of protons and neutrons do not
D) The total number of Nucleon changes between the parent and a daughter nuclei
Answer:
The answer is C
I just took the quiz
The statement (C) atomic identity changes but the total number of protons and neutrons do not is correct.
What is transmutation?The addition or deletion of protons to a nucleus is referred to as transmutation. A transmutation occurs when deuterium is converted to helium.
We have a decay equation shown below:
[tex]\rm _{11}^{6}\textrm{C} \rightarrow_{11}^{5}\textrm{B}+_{0}^{+1}\textrm{e}[/tex]
As the one-electron subtraction occurred and atom C becomes atom B so the decay equation is affected by atomic identity, but not by the total number of protons and neutrons.
Thus, the statement (C) atomic identity changes but the total number of protons and neutrons do not is correct.
Learn more about the transmutation here:
https://brainly.com/question/11545568
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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