Explanation:
Because acceleration is velocity in m/s divided by time in s, the SI units for acceleration are m/s2, meters per second squared or meters per second per second, which literally means by how many meters per second the velocity changes every second. ... The quicker you turn, the greater the acceleration.
Which of the following examples would be a physical change? (2 points)
a. Baking a cake
b. Boiling water
c. Burning wood
d. Lighting fireworks
Kyle runs 20 m north, 20 m west and then 20 m south, what is Kyles’s total displacement?
Answer:
Displacement = 20 m
Explanation:
Given that,
Kyle runs 20 m north, 20 m west and then 20 m south.
We need to find Kyles's total displacement.
Total distance = shortest path covered by Kyles.
The net displacement of Kyle is 20 m in east direction. Hence, this is the required solution.
Which statement best describes what happens when air warms in the atmosphere?
A.Air condenses and rises up.
B.Air expands and rises up.
C.Air expands and sinks down.
D.Air condenses and sinks down.
Answer:
Air condenses and rises up
A 15.75-9 piece has a specific heat of 0.46 J/g °C, and its temperature
changes from 25°C to 175°C. How much energy does it absorb?
Answer:
Q = 1086.75 [J]
Explanation:
We must use the following equation of thermal energy, which relates the specific heat to the mass and to the change in temperature.
[tex]Q=m*C_{p}*(T_{final}-T_{initial})\\[/tex]
Where:
m = mass = 15.75 [g]
Cp = specific heat = 0.46 [J/g*C]
Tfinal = final temperature = 175 [°C]
Tinitial = initial temperature = 25 [°C]
Now replacing:
[tex]Q=15.75*0.46*(175-25)\\\\Q= 1086.75[J]\\[/tex]
A cannonball is fired from ground level at an angle of 60.0 ° from horizontal at a speed of 72.5 m/s. What is the vertical component of the velocity at the time of launch?
Answer:
:)
Explanation:
Why will air sink if it is colder than the air around it?
Answer:
The molecules in hot air are moving faster than the molecules in cold air.
Your body produces sweat when you are hot.
What temperature is the sweat when it is first
produced? explain your answer.
Answer:
That's because cooling your body via sweating relies on a principle of physics called "heat of vaporization." It takes energy to evaporate sweat off of your skin, and that energy is heat. As your excess body heat is used to convert beads of sweat into vapor, you start to cool down.
find -7a + 3b gtytfvnhfcfgc
Answer:
what ahwhwhqqwwshwh# wvw
Explanation:
I dont think you can factor that.
Hi I need help with this question (see image ). Please show workings. If necessary.
Answer:
Answer
Advantages of alcohol over Mercury
(a) Freezing point of alcohol is −117∘
C and hence can record very low temperature For example in Arctic and Antarctic regions temperature may fall below −80∘
C which cannot be measured by mercury thermometer because mercury freezes at−39 ∘ C
(b) The expansion of alcohol per degree rise in temperature is much more around six times more then that of mercury and hence is more sensitive
(c) it can be coloured brightly by adding some dye in it and hence is easily detectable
Juan and Ally each have lawns the same size. Juan mows his lawn in one hour, but Ally
mows her lawn in two hours. Which statement is true?
Answer:
Ally has a harder time
ally takes more time
juan is quick
juan is more experienced
if none of those are awnser choices what are the awnser choices?
Explanation:
1. What type of interference is happening when intersecting light waves subtract from each other to create dark spots? Which letter on the diagram shows this phenomenon?
2. If light were made of a stream of particles, how would it behave when it passes through a slit or a keyhole? (1 point)
3. List three behaviors of light that support the theory that light travels in waves. Then describe and/or draw each behavior. (3 points)
4.What are the characteristics of a blackbody radiator? Give an example. (2 points)
Answer:
1. The type of interference happening when intersecting light waves subtract from each other to create dark spots is known as destructive interference
Destructive interference happens when the positive displacement or crest of one wave is cancelled by the negative displacement, or through of another wave of the same frequency resulting in a wave with lower amplitude
The letter on the diagram that shows destructive interference is the letter "c"
2. When particles pass translate through a key hole, they do not interfere with each. Therefore, when light is considered as a stream of particles, when it passes through a keyhole, there will be no interference, and the light will particles will not interact with other light particles such that the pattern formed on on a wall on the other where the particles impinge on will be the shape of the single slit or keyhole
3. Three behaviors of light that support the theory that light travels in waves includes;
a) Refraction
b) Interference
c) Diffraction
Refraction
Refraction describes the change in velocity of light when it travels from one medium to another of different density, in which the light changes its speed
Interference
Interference is the superposition of two or more waves with the addition of the wave displacements resulting in a wave of larger or lesser amplitude than each of the individual waves
Diffraction
Diffraction is defined as the tendency of light to bend or spread when it goes past an object placed in its path by passing around the objects edge
4. The properties of a blackbody radiator includes;
1) A blackbody radiator absorbs all electromagnetic radiation incident on it
2) A blackbody radiator is capable of emitting black-body radiation
3) The peak of the emitted radiation depends on the blackbody temperature
4) The length of the wavelength of the peak radiation is inversely proportional to the temperature of the blackbody
5) The blackbody has zero coefficient of reflection or transmission and therefore, it does not reflect incident heat or light which makes it black
An example of a blackbody radiator is a burglar alarm that flashes light when there is an incident but cannot be ordinarily seen because of its dark color which is meant to absorb all incoming light
Explanation:
Wave interference is the phenomenon which describes the effect of the coming together or superposition of two or more waves to result in a wave displacement at a given point that is either reinforced (larger), cancelled (lower) amplitudes or the waves may have their original amplitudes when there is no interference
The wave displacement for the waves coming from the same source are taken as vectors from which the combination is calculated by using vector addition.
Answer:
The type of interference happening when intersecting light waves subtract from each other to create dark spots is called destructive interference. The letter "C" on the diagram shows this phenomenon.
If light were made of a stream of particles, it would behave by traveling in straight lines when passing through a slit or a keyhole. The particles would not spread out or bend around the edges like waves do.
Three behaviors of light that support the theory that light travels in waves are:
Reflection: Light bounces off a surface, like a mirror, following the law of reflection.
Refraction: Light bends when it passes through different mediums, like water or glass.
Diffraction: Light waves spread out and bend around obstacles, like when it passes through a narrow slit.
Characteristics of a blackbody radiator include:
It absorbs all wavelengths of light that fall on it.
It emits radiation at all wavelengths according to its temperature.
An example of a blackbody radiator is a heated metal object that glows when it reaches high temperatures, such as a red-hot iron rod.
What is the kinetic energy of a 1.5x10^3 kg car traveling at 25 m/s?
Answer:
468750 J
Explanation:
Kinetic energy = (1/2) (mass)(velocity)^2
The kinetic energy of the car with a mass of 1.5 × 10³ kg running with a speed of 25 m/s is 468750 J .
What is kinetic energy?Kinetic energy of an object is a form of energy generated by virtue of the motion of the object. Kinetic energy is dependent on the mass and velocity of the body.
When a body starts to move its potential energy starts to convert to kinetic energy and the kinetic energy will be maximum at the highest speed. When the object slow down and pause in a position it gains potential energy again.
The kinetic energy KE = 1/2 mv²
Given mass = 0.9 Kg
velocity = 4 m/s.
KE = 1/2 0.9 Kg × 4² m/s
= 7.5 J
Therefore, the kinetic energy of the car is 7.5 J.
To find more on kinetic energy, refer here:
http://brainly.com/question/26472013
#SPJ2
Polly is pushing a box across the floor with a force of 30 N. The force of gravity is -8 in, and the normal force is eight in. Which value could describe the force of friction and Polly could not move the box
Answer:
A. -30 N
Explanation:
not sure but if the box isn't moving then the force opposite of Polly would be equal to the force she's exerting.
Answer:
-30 N....(A)
Explanation:
hope this helps, the person above me is also correct
3. A car does an emergency stop from 144 km\h in 4s
What was its deceleration?
Answer:
36?
Explanation:
A person who is heavier than the standard for the person’s height is _____
A. overweight.
B. obese.
C. hefty.
D. extremely obese.
Answer:
A. overweight
Explanation:
Answer:
c
Explanation:
since of his lack of growing his body dont know what to do with the needed fat so while he's still growing its in his tummy waiting
4) A sound wave has a frequency of 2700 Hz and a wavelength of 20cm. What is its
Velocity?
Answer:
velocity = 540m/s²
Explanation:
100cm = 1m
20cm= (20/100)m = 0.2m
velocity = 2700×0.2 = 540m/s²
What is the best snack
Answer:
Cheetos, takis, and doritos
Explanation:
Fruit bars
Explanation:
they ate healthy and tasty. they have them at costco
PLEASE ANSWER QUICKLY
Which of the following best describes the make up of a star?
Answers
•a collection of particles held together by gravity
•a body in orbit
•a cloud of dust and gas
•a luminous ball of plasma
Answer:
a luminous ball of plasma
f the same amount of force is applied to objects of different mass, (0.5, 1, 2, 5, 10, 20 kg.) will the objects all move at the same or different speeds?
Answer:
An object's velocity will only remain constant in the absence of any forces or if the forces ... The pendulum doesn't move because all the forces cancel each other out (add ... Note that an object that has a mass of one kilogram on earth would have a ... frames of animation
Explanation:
(the answer is not 0.482)
How fast did Newton decide a cannon ball shot out in order to escape Earth’s gravity?
Plugging in for the Earth's mass and for G, we have 11.2 km/s for the escape velocity for an object launched from the Earth's surface. This is about 25,000 miles per hour
A 40kg cannonball is fired from a cannon with a force of 300N, what is the cannonball’s acceleration?
Answer:
i dont think its possible without a picture
Explanation:
Answer:
The answer is 7.5 M/s
Explanation:
The acceleration is not given so you should divide the mass by the force to acheive your answer :)
if you drive at a speed of 63.2 miles/hour for 7.5 hours, how far will you go
Answer:
474 miles
Explanation:
63.2 x 7.5 = 474
Atoms with a low ionization energy give up their outer valence electrons with
ease.
O A. True
O B. False
Answer:
a. true
Explanation:
i think
that my answer
Question 6 of 10
In which three ways does the pattern seen on the screen during a double-slit
experiment support the wave model of light?
A. All of the light that enters the slits passes through them.
I B. There are bands of dimmer light.
C. There are bands of brighter light.
I D. The light bends around the edges of the slit.
Answer:
Explanation:
What net force is needed to acclegate a 10kg object to a rate of 4m/s^2
Answer:
acceleration of 3ms2
Explanation:
we can calculate the net force on the bowling ball from the above equation. Therefore, 30N of force is required to accelerate the bowling ball down the alleyway at a rate of 3ms2
HEY CAN ANYONE PLS ANSWER DIS!
Answer:
sodium chloride
Explanation:
Help plssssss would be highly appreciate ❤️❤️
Answer:
A
Explanation:
Answer:
I beleive B because its on land and the tecnotic plates are moving opposite directions pulling the ground into a tear like hole
Explanation:
what happen when you take two sides of something and pull opposite directions right it tears the same will happen to the groung.
Un movil viaja a 40km/h y comienza a reducir su velocidad a partir del instante t=0. Al cabo de 6 segundo se detiene completamente. ¿Cuál fue aceleración durante el periodo en el que redujo su velocidad?
Answer:
1,85 m / s²
Explanation:
De la pregunta anterior, se obtuvieron los siguientes datos:
Velocidad inicial (u) = 40 km / h
Hora inicial (t₁) = 0
Tiempo final (t₂) = 6 s
Velocidad final (v) = 0
Aceleración (a) =?
A continuación, convertiremos 40 km / ha m / s. Esto se puede obtener de la siguiente manera:
1 km / h = 0,2778 m / s
Por lo tanto,
40 km / h = 40 km / h × 0,2778 m / s / 1 km / h
40 km / h = 11,11 m / s
Por tanto, 40 km / h equivalen a 11,11 m / s.
Finalmente, determinaremos la aceleración del móvil durante el período en el que desaceleró. Esto se puede obtener de la siguiente manera:
Velocidad inicial (u) = 11,11 m / s
Hora inicial (t₁) = 0
Tiempo final (t₂) = 6 s
Velocidad final (v) = 0
Aceleración (a) =?
a = (v - u) / (t₂ - t₁)
a = (0 - 11,11) / (6 - 0)
a = - 11,11 / 6
a = –1,85 m / s²
Por tanto, la aceleración del móvil durante el período en el que se ralentizó es de –1,85 m / s²
Why can someone standing behind a mirror not see the image?
Answer:
The image behind the mirror is called a virtual image because it cannot be projected onto a screen—the rays only appear to originate from a common point behind the mirror. If you walk behind the mirror, you cannot see the image, because the rays do not go there