What is the mass of a ball that weighs 5.4 N?
Answer:
W= m*g
5.4=9.8*m
mass = 0.55
What is the kinetic energy of a running back that has a mass of 95kg and can run 8.5 m/s?
Explanation:
KE = mv2 b. Suppose Karl uses a different puck with. = (85.0 kg)(8.5 m/s) half the mass ... How will. = 3.1X103 J the kinetic energy and work differ from KE; + PE; = KE; + PE those in ... If the puck has half the mass, it still .
Answer:
3431.875 J or 3.432 kJ
Explanation:
Kinetic energy can be found using the equation m/2*v^2.
We know m and v and we can plug in those values to get the answer.
95/2 times 8.5^2 = 3431.875 J or 3.432 kJ.
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
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]
The more active you are, the fewer calories you should eat. A. true B. false
Answer: false
Explanation:
the more active you are, the more calories you are burning. consuming less calories is not ideal, you need to eat more since you are burning more than normal.
Answer:False
Explanation:The more active you are, the more calories you burn. Calories are a form of energy and you need to regain that energy by eating more calories
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
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.
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
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
Heyyyyyy please answer all of the questions
What is the mass of a ball being rolled at 3.5 m/s2 from a 30 N force?
Explanation:
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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
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
How many week are in .62 years?
Answer:
32.32857
Explanation:
Searched on the web
How much kinetic energy does a 25 kg soccer ball have once its been kicked and has a speed of 5 m/s? HELP PLEASE I HAVE TO TURN IT IN OR I GET A 0 I BEG YOU GUYS
[tex]E_c = \dfrac{mv^2}{2}[/tex]
[tex]E_c = \dfrac{25\cdot (5^2)}{2}[/tex]
[tex]E_c = 312.5 \text{ J}[/tex]
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.
A spring has a length of 0.270 m when a 0.300 kg mass hangs from it, and a length of 0.750 m when a 2.80 kg mass hangs from it. (a) What is the force constant (in N/m) of the spring?
Answer:
k = 51.09 N/m
Explanation:
Given,
mass, m₁ = 0.3 Kg
length of spring, x₁ = 0.27 m
Mass, m₂ = 2.80 Kg
Length of spring, x₂ = 0.750
We know that
Restoring force, F = k x
Gravitation force, F = m g
Now,
m₁ g = k x₁ ......(1)
And
m₂ g = k x₂ .......(2)
where k is spring constant
Subtracting equation (2)- (1)
(m₂-m₁)g = k(x₂-x₁)
(2.8-0.3) x 9.81 = k (0.75 - 0.27)
24.525 = k x 0.48
k = 51.09 N/m
Hence, spring constant is 51.09 N/m.
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
A sound wave generated by a musical note has the characteristics presented
in the table. What is the missing value?
Medlum
Wave speed
(m/s)
Frequency
(Hz)
Wavelength
Air
346
55
6.3
Glass
5,640
55
102
Aluminum
6,420
55
?
A. 123
B. 55
C. 117
D. 73 The answer is 117
Answer:
option c
Explanation:
6420/55
116.7
approximately 117
Suppose a city with population 800,000 has been growing at a rate of 8% per year. If this rate continues, find the population of this city in 24 years.
The population in 24 years will be approximately (Round to the nearest whole number as needed.)
Answer:
2,336,000
800,000 × 0.08 = 64,000
800,000 + (64,000×24)
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
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
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 :)
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:
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.
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:
1. Amplitude, loudness, volume, dynamics, and intensity are related but distinct terms. How are they different?
According to the law of conservation of energy, how are potential energy and kinetic energy related?
A. In a closed system, the potential energy at the bottom is equal to the kinetic energy at the top.
B. The potential energy of a closed system will always be more than the kinetic energy.
C. In a closed system, the kinetic energy is twice the amount of the potential energy.
D. There is no relationship between kinetic energy and potential energy.
Answer:
A. In a closed system, the potential energy at the bottom is equal to the kinetic energy at the top.
Explanation:
According to the law of conservation of energy, energy is neither created nor destroyed but transformed from one form to another.
Potential energy is the energy due to the position of a bodyKinetic energy is the energy due to the motion of a body.Based on the premise of the law of conservation of energy, both kinetic energy and potential energy are equal at the top and bottom in the system.
This way energy is conserved.