Answer:
the reaction is a physical reaction and it is exothermic as it releases heat to the sorrounding
Explanation:
because the mass of paper burnt is equal to the mass of products which are ashes
A friend tells you that a different size of ball bearing might make your skateboard move faster. You try three different sizes and keep track of the time to roll 50 feet. You write down exactly how you tried the ball bearings on your skateboard and make a chart of the time it took to roll the 50 feet for each size ball bearing.
Answer:
Experimental variablr
Explanation:
I just did it:)
Why is an absorption spectrum especially useful for astronomers?.
Answer:
It has dark lines in it that allow astronomers to determine what elements are in the star. red-shifted (shifted toward the red end of the light spectrum).
Explanation:
what is sound? what are the types of sound?
Answer:
Sound can be of different types—soft, loud, pleasant, unpleasant, musical, audible (can be heard), inaudible (cannot be heard), etc. Some sounds may fall into more than one category. For instance, the sound produced when an aeroplane takes off is both loud and unpleasant.
.
.
Please mark me as brainlist
Explanation:
sound is a form of energy which produces a sensation of hearing in our ears.
we are different types of sound around us everyday we are the sun for our making parents and friends to sound of Baker's running on the road the barking of dog the sound of elephant the clutter of pants in the kitchen.
radio television guitar animals battles machines Ekta some examples of sound
hope it helps
State the five important assumptionns of the kinetic theory of matter
At one point in the rescue operation, breakdown vehicle A is exerting a force of 4000 N and breakdown vehicle B is exerting a force of 2000 N.
(i) Using a scale of 1 cm = 500 N, make a scale drawing to show the resultant force on the truck.
how can I determine the pressure of a certain place. I mean formula of pressure
Answer:
Pressure and force are related, and so you can calculate one if you know the other by using the physics equation, P = F/A. Because pressure is force divided by area, its meter-kilogram-second (MKS) units are newtons per square meter, or N/m2.
Can someone please help meee
Answer:
I think your answer might be letter C
Explanation:
If it is wrong I am so sorry forgive me if it is wrong let me know please ok.
Cecily is inflating one of her bicycle tyres with the pump below. When she pushes the plunger down, does the volume of the gas in the
cylinder increase, decrease or stay the same?
Answer:
See the explanation below
Explanation:
This problem can be better understood graphically, so in the attached image we will use a diagram of a positive displacement air pump.
We can see that when she pushes the plunger, we see that the volume decreases.
Analyze Is it possible for an
object that has a constant
negative acceleration to
change the direction in which
it is moving? Explain why or
why not.
Answer:
Yes it is possible. An object can have a negative acceleration (deceleration) and change its direction. Take for example a car decelerating from 5 m/s to a speed of 1 m/s and then taking a right turn. It changed its direction while still maintaining a negative acceleration.
A cyclist travels from A to B along the arc of a circle of radius 25 m as shown.
0 Calculate the distance travelled by the cyclist.
(ii) Calculate the displacement undergone by the cyclist.
A
4
25 m
12nn41
The displacement of the cyclist from point A to B is 39.3 m.
Displacement of the cyclist
The displacement of the cyclist is equal to the change between the final position and initial position of the cyclist. This can also be described as the shortest distance between two positions.
From the given image, the displacement of the cyclist from point A to B can be determined by formula for calculating length of arc,
D = (θ/360) x 2πr
D = (90/360) x 2π x 25
D = 39.3 m
Thus, the displacement of the cyclist from point A to B is 39.3 m.
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which object will require the greatest amount of force to change its motion? a: a 63kg object moving 27 m/s b: a 75kg object moving 22 m/s c: a 72kg object moving 25 m/s d: a 55kg object moving 32 m/s
Answer:
A 72 kg object moving 25m/s
Explanation:
Answer:
C. a 72kg object moving 25 m/s
Explanation:
I just did it on A pex
What is the density of a cube of iron that is 3 inches on each side and has a mass of 13g?
Answer:
[tex]\boxed {\tt 0.481481481 \ g/in^3}[/tex]
Explanation:
Density can be found by dividing the mass by the volume.
[tex]d=\frac{m}{v}[/tex]
The mass is 13 grams. Let's calculate the volume. This is a cube, so the volume formula is:
v=s³The side length (s) is 3 inches v=(3 in)³= 3 in * 3 in * 3in = 27 in³The volume is 27 cubic inches.
[tex]m= 13 \ g\\v= 27 \ in^3[/tex]
Substitute the values into the formula.
[tex]d=\frac{13 \ g}{27 \ in^3}[/tex]
Divide.
[tex]d=0.481481481 \ g/in^3[/tex]
The density is 0.481481481 grams per cubic inch.
explain why the two methods are likely to give different results?
Explanation:
Averaging uses estimation to find the answer and is likely close to the answer, but not exact, especially if it's decimals. Calculating gives exact answers, which gives a difference in the two answers or results.
1. The radius of Earth is 6.40 x 10° km. The moon is about 3.84 × 10' km away
from Earth and has a diameter of 3475 km. The Pacific Ocean surface, which
can be considered a convex mirror, forms a virtual image of the moon. What is
the diameter of that image?
Answer: 28.71 km
Explanation:
For the convex mirror (ocean):
Radius of curvature = 6.4*10^3 km
Focal length (f) = R/2 = 3.2*10^3 km
Object distance (u) = -3.84*10^5
Mirror formula: [tex]\frac{1}{u} + \frac{1}{v} = \frac{1}{f}[/tex]
[tex]\frac{1}{u} + \frac{1}{v} = \frac{1}{f}[/tex]
[tex]\frac{-1}{3.84*10^5} + \frac{1}{v} = \frac{1}{3.2*10^3}[/tex]
v = 3173.55km
Magnification, [tex]m = \frac{-v}{u} = \frac{-3173.55}{-3.84*10^5} = \frac{h_{i} }{h_{o} }[/tex]
So, height of image/height of object = 3173.55/3.84*10^5
Diameter of image = 3173.55/3.84*10^5 * 3475
Diameter of image = 28.71 km
Therefore, the diameter of the image is 28.71 km
A roller coaster is moving at 20 m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the roller coaster? SHOW YOUR WORK!
Answer:
acceleration equal to 0.5 m / s
Explanation:
since 20 x 0.5 = 10
Undigested and unabsorbed materials from the
small intestine pass into the
a. gall bladder
b. stomach
c. colon
d. liver
Two identical spheres are attached to opposite ends of a thin rod of negligible mass, as shown in the figure. The
spheres-rod system is thrown straight upward and is rotating counterclockwise as it moves through the air. Which of
the following is correct about the angular momentum of the spheres-rod system while it is in the air? What is a valid
justification?
(A) The angular momentum remains constant because there is never a net torque acting on the system.
(B)
The angular momentum remains constant because there is a changing net torque acting on the system that
averages to zero over time.
(C) The angular momentum constantly decreases because there is a constant net torque acting on the system.
(D) The angular momentum constantly increases because there is a constant net torque acting on the system.
The angular momentum remains constant because there is a changing net torque acting on the system that averages to zero over time.
What is principle of conservation of angular momentum?This principle states that If the external torque acting on a system is zero, then the angular momentum of the system is constant.
When the spheres-rod system is thrown straight upward and it rotates counterclockwise, the net torque acting on the system averages to zero over time.
Thus, we can conclude that, the angular momentum remains constant because there is a changing net torque acting on the system that averages to zero over time.
Learn more about angular momentum here: https://brainly.com/question/7538238
U need help so can some one help me
Answer:
are sure this is a question
1 The photoelectric effect is good evidence for __________.
A both wave and particle nature, because it blends photons with electrons
B the wave nature of EM radiation, because it shows how wave amplitude is proportional to quanta of energy referred to as photons
C the particle nature of EM radiation, because it shows how frequency is proportional to quanta of energy referred to as photons
D neither the wave nor the particle nature of light, because results vary based on the frequency of light used
2 How can you calculate the momentum of a photon?
A the product of 2, pi, and the photon's radius
B the product of mass and velocity
C a photon doesn't have momentum because it has no mass
D Planck's constant divided by the photon's wavelength
3 Interference and diffraction patterns are good evidence for __________.
A the particle nature of EM radiation
B neither the particle nature nor the wave nature of EM radiation
C both the particle nature and wave nature of EM radiation
D the wave nature of EM radiation
4 The ultraviolet catastrophe is good evidence for the:(1 point)
A particle nature of quanta
B wave nature of quanta
C neither the wave nor the particle nature of quanta
D both particle and wave nature of quanta
Answer:
1. the particle nature of EM radiation, because it shows how frequency is proportional to quanta of energy referred to as photons
2. Planck's constant divided by the photon's wavelength
3. the wave nature of EM radiation
4. particle nature of quanta
Read the chapter next time bozo
Explanation:
The photoelectric effect is good evidence for
The particle nature of EM radiation, because it shows how frequency is proportional to quanta of energy referred to as photons.Planck's constant divided by the photon's wavelength.The wave nature of EM radiation.Particle nature of quanta.What are two nature of light?Light has two different nature:
Wave nature Particle natureWhat do you mean by particle nature of light?Particle nature of light states that light consists of particles called 'Photons'.Photons are considered as bunch of energy , which represents Electromagnetic radiation.What is wave nature of light?Wave nature of light states that light behaves as an electromagnetic wave.
What is photoelectric effect?The phenomenon of emission of electrons from the surface of the metal when the light of suitable frequency falls on it.
What is Plank's constant?The physical constant that relates the energy carried by a single photon to its corresponding frequency.It is denoted by 'h'.Its value is 6.62607015 × 10-34 m2 kg / s.Thus , we can say that, The photoelectric effect is good evidence for
The particle nature of EM radiation, because it shows how frequency is proportional to quanta of energy referred to as photons.Planck's constant divided by the photon's wavelength.The wave nature of EM radiation.Particle nature of quanta.Learn more about Photoelectric effect here -
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A long wire carrying a 5.5 A current perpendicular to the xy-plane intersects the x-axis at x=−2.0cm . A second, parallel wire carrying a 2.5 A current intersects the x-axis at x=+2.0cm . Part A At what point on the x-axis is the magnetic field zero if the two currents are in the same direction? Express your answer in centimeters. x x = nothing cm SubmitRequest Answer Part B At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions? Express your answer in centimeters. x x = nothing cm SubmitRequest Answer Provide Feedback Next
Answer:
a
The point on the x-axis where the magnetic field will be zero is [tex] d = 2.8 \ cm [/tex]
b
The point on the x-axis where the magnetic field will be zero is [tex]Z = 5.333 \ cm [/tex]Explanation:
From the question we are told that
The first current is [tex]I_1 = 5.5 \ A[/tex]
The point of x- axis intersection is [tex]x = -2.0 \ cm[/tex]
The second current is [tex]I_2 = 2.5 \ A[/tex]
The point of intersection of the x-axis is [tex]x = 2 .0 \ cm[/tex]
Generally given that the current of the two wires are same direction it means that the magnetic field in -between the wires will cancel out giving zero
So
[tex]B_1 - B_2 = 0[/tex]
=> [tex]B_1 = B_2 [/tex]
=> [tex]\frac{\mu_o * I_1 }{2 * \pi * d } = \frac{\mu_o * I_2 }{2 * \pi * (4 -d) }[/tex]
Here d is the of one wire to the point where the magnetic field is 0
and given that the total distance in-between the wire is D = 2 = 2 = 4
Hence the distance of the other wire to the point where magnetic field is zero is (4 - d)
So
[tex]\frac{5.5}{ d} = \frac{2.5}{4-d}[/tex]
=> [tex] 8d = 22 [/tex]
=> [tex] d = 2.8 \ cm [/tex]
So the point on the x-axis where the magnetic field will be zero is [tex] d = 2.8 [/tex]
Generally given that the current of the two wires are opposition direction it means that the magnetic field at a position which is not in-between the wire will be zero
Let that position be k
Let the distance from the middle of both wires to k be Z
So
[tex]\frac{\mu_o * I_1 }{2 * \pi * ( 2 + Z) } = \frac{\mu_o * I_2 }{2 * \pi * (Z -2) }[/tex]
=> [tex]5.5 Z - 11 = 5+ 2.5 Z[/tex]
=> [tex]3Z = 16[/tex]
=> [tex]Z = 5.333\ cm[/tex]
The diagram shows two forces acting on an object. The forces have magnitudes F1 = 2.7 N and F2 = 0.80 N.
What third force will cause the object to be in equilibrium?
O2.8 Nat 163° counterclockwise from F1
O 1.8 N at 163° counterclockwise fromF1
O2.8 N at 123° counterclockwise from F1
O 3.0 N at 147° counterclockwise from F1
Answer:
2.8 [N] at 163° counterclockwise from F1
Explanation:
To solve this problem we must perform a summation of forces on the X & y axes, these summations of forces must be equal to zero.
ΣFx = 0
- F1 + Fx = 0
- 2.7 + Fx = 0
Fx = 2.7 [N]
ΣFy = 0
- Fy + 0.8 = 0
Fy = 0.8 [N]
Now using the Pythagorean theorem we can calculate the magnitude of the force.
F = √(2.7)² + (0.8)²
F = 2.81 [N]
Now we can determine the angle using the tangent of the angle.
tan (α) = F2/F1
α = tan^-1 (0.8/2.7)
α = 16.5°
The force is in the fourth quadrant, so we need to subtract 180° from the calculated angle.
180 - 16.5 = 163.5°
Therefore the force is going to the 2.8 [N] at 163° counterclockwise from F1
what state of matter is the sun
Answer:
the sun is plasma
Explanation:
it is a hot ball of gas made out of oxygen
Answer:
Plasma
Explanation:
All stars are made of gas, however the sun is so hot that most of that gas is plasma
What kind of question can be asked upon reflection.
Answer:
Explanation:
When dealing with optics, there is an incident wave, a reflected wave, and a transmitted wave. An incident wave is the initial wave coming out from the source, like a flashlight.
Then the reflected wave is created when the incident wave encounters an interface like a piece of glass. The reflected wave will reflect like you would expect.
Then, the transmitted wave is the wave which passes through the interface and continues.
So, a good question would be to ask for the value of the reflected wave function given an initial incident wave.
Another example entirely would be to look at the reflected wave on a tensioned string. If you shake a string up and down, a wave will be sent through it. Once hitting the wall, the wave will reflect back. A good question there is asking how the amplitude of the wave changed.
During his recent skydiving adventure, Luke Skyfaller has reached a terminal speed of 9.8 m/s as he approach the ground with his parachute. During an attempt to snap one last photo with his camera Luke fumbled it from a height of 52.8 m above the ground determine the speed with which the camera hits the ground.
Answer:
The correct solution is "33.62 m/s".
Explanation:
The given values are:
Speed
u = 9.8 m/s
Height
s = 52.8 m
As we know,
⇒ [tex]v^2 = u^2 + 2as[/tex]
On putting the estimated values, we get
⇒ [tex]=(9.8)^2+2\times 9.8\times 52.8[/tex]
⇒ [tex]=96.04+1034.88[/tex]
⇒ [tex]=\sqrt{1130.92}[/tex]
⇒ [tex]=33.62 \ m/s[/tex]
Which does not utilize the gyroscope effect? question 12 options:
a spiral pass in football
a spinning top
a flying plastic disk
a magnetic compass
A spinning top (also called easily a top) is a specific toy that does not utilize the gyroscope effect during its movement.
What is the gyroscope effect?The gyroscope effect refers to the characteristic that allows an object to maintain a constant direction of axis rotation when it is rotating.
This effect (gyroscope effect) mainly depends on the velocity of the object and its direction.
The gyroscope effect is exploited by many applications such as in missiles or satellites when they are in orbit.
Learn more about the gyroscope effect here:
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Wendy runs 800m East on a straight road and then she turns west and runs back 200m back. What would be the distant she travelled and her displacement.
Answer:
Answer is C
Explanation:
I took it already
A number of compounds containing the heavier noble gases, and especially xenon, have been prepared. One of these is xenon hexafluoride (XeF6), which can be prepared by heating a mixture of xenon and fluorine gases. XeF6 is a white crystalline solid at room temperature and melts at about 325 K. A mixture of 0.0600 g of Xe and 0.0310 g of F2 is sealed into a 100.0-mL bulb. The bulb contains no air or other gases. The bulb is heated, and the reaction above goes to completion. Then, the sealed bulb is cooled back to 20.0°C. What will be the final pressure in the bulb, expressed in torr?
Answer:
The answer is "82.2 torr"
Explanation:
moles of Xe:
[tex]= \frac{0.06}{131.293} \\\\ =0.00045699313 \ \mol[/tex]
moles of [tex]F_2[/tex]:
[tex]= \frac{0.0274}{38} \\\\= 0.00072105263\ \ mol[/tex]
moles of produced [tex]XeF_2:[/tex]
[tex]= 0.00024[/tex]
moles of left [tex]Xe[/tex]:
[tex]= 0.00021[/tex]
Calculate the Pressure:
[tex]= \frac{(0.08206\times 0.00024 \times 293)}{(.1)} + \frac{(0.08206\times 0.00021 \times 293)}{(.1)} \\\\= 0.10819611 \ \ atm \\\\ = 0.10819611 \times 760 \\\\ = 82.2 \ \ torr[/tex]
Why did they compare the DNA to words in a language?
Answer:
to go to get a bike
Explanation:
Two angles are complementary. The first angle measures 39º and the second angle
is 3y. What is the value of y?
O 51°
O 470
O 11°
O 17°
Answer:
11
Explanation:
i've been in k12 and i got an a on this anser
Which is a characteristic of the image formed between F and the center of the lens? The image is located between F and the center of the lens, on the other side of the lens. The image is real. The image is upright. The image is bigger than the actual object.
Option C is correct. The image is located between F and the center of the lens, on the other side of the lens the upright than the actual object.
What is the upright image?Virtual and imaginary image is the type of upright image. A virtual picture is generated when light rays appear to meet at a certain spot following reflection from a mirror.
The picture that appears right-side-up is called an erect image. Unlike a virtual image, it is created by the real junction of light beams.
The lens in the illustration is a concave lens. The light rays that fall from the item onto the lens diverge, making it a diverging lens.
The item is held between the focus and the lens's center. At the same side of the item, an image would form between the focus and the lens's center.
The picture would be simulated, shrunk, and centered. As a result, the correct answer is: "The picture is upright."
Hence option C is correct
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