Answer:
9.8kW
Explanation:
Given data
Mass= 60kg
Hieght= 4m
Time= 4.2seconds
We know that the energy possessed is given as
PE=mgh
PE=60*9.81*4
PE= 2354.4 Joulse
Also, the expression for power is
Power=Energy*Time
Power= 2354.4*4.2
Power=9888.48 watt
Power= 9.8kW
which of the following are fire preventions guidelines
Answer:
there is no list of "the following" you might want to re-upload your question.
A plastic rod is rubbed with a cloth and becomes positively charged. After charging, the rod is held close to the suspended table-tennis ball shown in Fig. 9.1. The table-tennis ball is covered with metal paint and is uncharged.
Describe what happens to the charges on the metal-painted table-tennis ball as the positively-charged rod is brought close to the ball.
where would you feel the most motion?
Answer:
A
Explanation:
since its the tip, you will feel it the most there.
Need help pls. It is for acellus
Answer:
The height of the water column = 1.62405[tex]\overline{30}[/tex] × 10⁻¹ m
Explanation:
The air cavity in the Coke bottle = 0.220 m deep
The fundamental (frequency) it plays when water is added to shorten the column and it is blown across the top, f = 528 Hz
The given speed of sound in air, v = 343 m/s
We note that the air cavity in the coke bottle is equivalent to a tube closed at one end
The fundamental frequency for a tube closed at one end, 'f', is given as follows;
f = v/(4·L) = v/λ
Where;
L = The height of the water column
λ = The wavelength of the wave
∴ 4·L = v/f = (343 m/s)/(528 Hz) = 0.6496[tex]\overline{21}[/tex] m
∴ L = 0.6496[tex]\overline{21}[/tex] m/4 = 0.162405[tex]\overline{30}[/tex] m
The height of the water column = 1.62405[tex]\overline{30}[/tex] × 10⁻¹ m.
Answer:
0.058
Explanation:
got it right on acellus
PLZZZZ HELPPPPPP MEEEEEE!!!!!! ASAP!!! ILL GIVE 20 POINTS AND BRAINLIEST!!!
:'(
I am soooooooooooo desperate.
Answer:
the answers the correct one is C
Explanation:
In radioactive decay processes, a very important concept is the half-life time, which is the time it takes for the parent nuclei to decompose into child nuclei.
expressed this mathematically is
N = N₀ [tex]e^{- \lambda t}[/tex]
for the average life time
N₀ / 2 = N₀ [tex]e^{- \lambda T_{1/2}[/tex]
T =[tex]\frac{ln 2x}{ \lambda}[/tex]
Analyzing this expression, the nuclei that decay are the so-called parents and the new nuclei called children appear.
when checking the answers the correct one is C
What is the difference between Gravitational Potential Energy and Potential
Energy?
Answer:
Potential basically tells us the ability of an object to do some work. And Potential energy is the amount of energy it acquires due to that Potential difference.
Explanation:
what is the electric potential at a point in space if a charge of 7.3x 10^-17 coulombs at that point has a potential energy of 6.4
Answer:
V = 0.87 volt
Explanation:
Given that,
Charge, [tex]q=7.3\times 10^{-17}\ C[/tex]
Electric potential energy, [tex]U=6.4\times 10^{-17}\ J[/tex]
We need to find the value of electric potential at a point. The relation is as follows :
[tex]V=\dfrac{U}{q}[/tex]
Where
V is electric potential
So,
[tex]V=\dfrac{6.4\times 10^{-17}}{7.3\times 10^{-17}}\\\\V=0.87\ V[/tex]
So, the value of the electric potential at a point is equal to 0.87 Volts.
help please
which of the following reacts with most metals to form Hydrogen gas
A.acids
B.Bases
C.acids&bases
Answer:
acid and bases
Explanation:
Define centre of mass.
Answer:
The center of mass is a position defined relative to an object or system of object
A car is moving at 5 m/s at first hill, h= 20 meters.
(a) Determine the speed of the car at C point.
(b) Determine the speed of the car at B point.
A child does 12 J of work pushing his 3 kg toy truck. With what velocity does the toy move after the child is done pushing
Answer:
2.82 V
Explanation:
v^2 = 2(12) / 3 is the formula
v^2 = 24 / 3
v^2 = 8, then you square v^2 and 8, to remove the ^2
and you got your answer! I believe this is correct, but let me know if it isn't.
A stationary hockey puck has a mass of 0.27 kg. A hockey player uses her stick to apply a 18 N force over a distance of 0.42 m. How much work does this force do on the puck?
Group of answer choices
7.6 J
-43 J
-7.6 J
28 J
43 J
1. Se tienen 10 moles de gas nitrógeno molecular: N2 en un recipiente a 400 K. Manteniendo la temperatura a 400 K y las 10 moles en el recipiente se disminuye la presión desde 10 atm a 1 atm para obtener un volumen final del gas de 20 litros. El volumen inicial del gas a. 0,5 litros b. 2 litros c. 100 litros d. 200 litros
Answer:
B. 2 litros.
Explanation:
De acuerdo con el enunciado, el gas experimenta un proceso isotérmico y se conserva su masa. Asumiendo que el gas se comporta idealmente, tenemos la siguiente relación entre los estados final e inicial:
[tex]P_{1}\cdot V_{1} = P_{2}\cdot V_{2}[/tex] (1)
Donde:
[tex]P_{1}, P_{2}[/tex] - Presiones inicial y final, medidos en atmósferas.
[tex]V_{1}, V_{2}[/tex] - Volúmenes inicial y final, medidos en litros.
Si sabemos que [tex]P_{1} = 10\,atm[/tex], [tex]P_{2} = 1\,atm[/tex] y [tex]V_{2} = 20\,L[/tex], entonces el volumen inicial del gas es:
[tex]V_{1} = \frac{P_{2}\cdot V_{2}}{P_{1}}[/tex]
[tex]V_{1} = 2\,L[/tex]
Por lo tanto, la respuesta correcta es B.
Which angle is the angle of reflection? (5 points)
01
O 2
O 3
Answer:
The answer is "2"
Explanation:
I took the test :)
PLZ HELP I DONT KNOW THIS ONE
Some ancient objects have been well-preserved in high mountain ranges,
where the concentration of oxygen is low. Otzi the Iceman lived more than
5,000 years ago. Archaeologists found him with his leather pouch, clothes,
and tools perfectly preserved in the ice of the Alps.
Marie's mother lost a leather purse in the yard of their house in Florida, where
the air has more oxygen. Marie found it 30 years later under a tree. It was
rotted and decayed.
Review the information in the data table. What does this information tell you
about the rate of decay reactions relative to the concentration of oxygen?
Answer:
yeah
Explanation:
The information tells you about the rate of decay is that in Florida the reaction occurs more slowly when there is less oxygen in the air.
What is the rate of decay?The reduction in the number of radionuclides per unit time is the rate of decay.
The following table shows that the rate of decay only depends upon the level of oxygen. In Florida concentration of the oxygen in the air is high
Due to this the decay time is less.
The decay time is inversly propotional to the rate of decay. In Florida the rate of decay is high.
Hence the information is that reaction occurs more slowly when there is less oxygen in the air.
To learn more about the rate of decay refer to the link;
https://brainly.com/question/14486631
Whose atomic theory explains how atoms emit (release) and absorb light?
Bohr’s
Dalton’s
Rutherford’s
Thomson’s
Answer:
Bohr’s
Explanation:
Answer:
A
Explanation:
how much does the angle of refraction change from 380nm to 700nm when the incident angle is 80?
Answer:
35 degrees
Explanation:
The incident angle, an 80-degree angle, and as the angle of incidence increases, the amount of refraction also increases. So, we can expect a significant change in the angle of refraction from blue to red light at an 80-degree angle of incidence.
What is refraction?Refraction refers to the bending of light when it passes from different mediums.The amount of refraction that occurs at an interface between two materials depends on the wavelength of light, the angle of incidence, and the properties of the materials. The relationship between these factors is described by Snell's law:
n1 sinθ1 = n2 sinθ2
where n1 and n2 are the refractive indices of the two materials, θ1 is the angle of incidence, and θ2 is the angle of refraction.
For a given angle of incidence, the amount of refraction that occurs is greater for shorter wavelengths (i.e., blue light) than for longer wavelengths (i.e., red light). This effect is known as dispersion, and it is why we see rainbows when sunlight is refracted through water droplets.
In the absence of any information about the properties of the materials involved, we can assume that the amount of refraction will increase as the wavelength decreases.
Learn more about refraction, here:
https://brainly.com/question/14760207
#SPJ3
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
Why are infrared waves located between microwaves and visible light on the electromagnetic spectrum?
Answer: The infra red waves is located between microwave and visible light based on their WAVELENGTH and FREQUENCY of occurrence.
Explanation:
Electromagnetic waves are those waves that do not require or need a material medium for its propagation, but they are able to travel through a vacuum. They exhibit or show all properties associated or connected with light. They are undeflected in electric and magnetic fields. These electromagnetic waves are arranged in order of their FREQUENCY and WAVELENGTHS which is known as ELECTROMAGNETIC SPECTRUM.
FREQUENCY is defined as the number of cycles which the wave completes in one second and is measured in Hertz(Hz). While WAVELENGTH is defined as the distance between two successive crests or troughs of waves which is measured in meter (m).
The electromagnetic spectrum is made up of the following rays which is arranged from the biggest wavelengths to the smallest:
--> Radiowaves
--> microwave :
--> infrared rays:
--> visible light:
--> ultraviolet rays
--> x-rays and
--> Gamma rays.
According to the arrangement of the spectrum above, the microwave has a higher wavelength and frequency than the infrared rays, while the visible light has a lower wavelength and frequency than the infrared rays.
Work done depends on
A. Force
B. Displacement
C. Both force and displacement
D. Neither force nor displacement
Answer:
C. Both force and displacement
Explanation:
Hope this helps
A force of 20 N acts upon a 5000g block. Calculate the acceleration of the object
Answer:
a = 4 m/s²
Explanation:
Given: 5000 g, 20N
To find: Acceleration (a)
Solution: Firstly, convert 5000g to kilograms
1000g = 1kg
∴ 5000g = 5kg if divided by 1000
A = F ÷ m
= 20 ÷ 5
= 4 m/s²
Newtons are derived units, equal to 1 kg-m/s². In other words, a single Newton is equal to the force needed to accelerate one kilogram one meter per second squared.
A macro element that is a component of ATP
Phosphorus is a macro element that is a component of ATP
Answer:
Phosphorus is a macro element that is a component of ATP.
Explanation:
Some people say you can tell if someone has HIV by looking at him or her. True or false? Why?
Answer:False.
Explanation: HIV is a viruse that only shows symptoms after a few weeks. in Fact HIV does not show any physical symptoms. So, no you can not tell if someone has or is been infected by HIV by directly looking at them.
Have a Nice Day!!! =)
Photon and quantum may be used interchangeably.
True
False
Answer:
true
Explanation:
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:
What is the characteristic of the columns in the periodic table?
Answer: The periodic table also has a special name for its vertical columns. Each column is called a group. The elements in each group have the same number of electrons in the outer orbital.
Explanation: :)
A substance has a freezing point of -36 degree C and a boiling point of 356 degree C. At what temperature would this substance be in its liquid state?
2 points
A.375 degree C
B.-100 degree C
C.80 degree C
D.-50 degree C
Answer:
C
Explanation:
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How much acceleration does a car need if it is to go a distance of 620 ft. In a time of 20 sec while it is speeding up
How much work does a 120 watt motor perform for 300 seconds?
PLEASE I NEED HELP
and please don't add some site
Answer:
36,000j
Explanation:
W= P•t
120•300= 36000
I checked my answer with P= W/t and got the right answer
hope this helps
6CO2 + 6H20 → C6H12O6 + 602
What type of model is shown?
a
b
computer model
conceptual model
physical model
C
mathematical model
Answer:
C. physical model
Explanation:
Sana nakatulong