Answer:
Explanation:W=F*S
W=work =?
F=force =500N
S=displacement =0m
please feel free to ask if you have any questions
How far can you get away from your little brother with a paintball marker if you can travel at 3 m/s and you have 15s before he sees you?
Answer:
45 meters
3 (m/s) x 15 (s) = 45 meters
8 N to the Lefr and 4 N to the right find the net force is this balanced
Answer:
4N to the left. No it is not balanced.
Explanation:
8 -4 = 4 N of force
Balanced would be if they equaled zero, so 8 to the left and 8 to the right
You toss an apple across the room to a friend. Which of the following
statements is true about the apple at the top of its trajectory?
Your question is incomplete. Please find below the complete question.
B. Its acceleration is 9.8 m/s^2 down.
What does acceleration mean?Acceleration, is the rate at which speed adjustments with time, in phrases of pace and path. A point or an item moving in a line is expanded if it hurries up or slows down.
We always have a vertical (downward ) acceleration of 9,8 m/s^2. The horizontal acceleration is zero in case you overlook friction forces. The vertical issue of speed is zero on the top of the trajectory whilst the horizontal component isn't like zero in any other case the apple will no longer arrive at your buddy.
You toss an apple across the room to a friend. Which of the following statements is true about the apple at the top of its trajectory?
A. Its acceleration is zero.
B. Its acceleration is 9.8 m/s2 down.
C. The horizontal component of its velocity is zero.
D. The vertical component of its velocity is 9.8 m/s down.
Learn more about acceleration here: https://brainly.com/question/14344386
#SPJ2
How old does an individual need to be in the United states to purchase any tobacco products
Answer: 18 years of age
Explanation:
Whats the voltage supplied by the battery if the resistance is 480 Ohms?
Choose whether the statements below are true or false
Answer:
1. false 2.true 3. true
Explanation:
there was more scientific method and more ways to solve
the hypothesis show the experiment design
IS IT right to the left a b c d
Answer:
c ok
Explanation: right?
Answer:
16
Explanation:
what is the force when an object exerts 15 pascal pressure on a square surface of side 5 meters
Answer:375N
Explanation:
pressure =15 pascal
Length =5 m
Area=length x length
Area=5 x 5
Area=25 m^2
Force=pressure x area
Force=15 x 25
Force=375N
How does increasing the height of the counterweight affect the amount of potential energy of the counterweight?
Answer:
Explanation:
It’s because of gravitational potential energy, the higher the object is from the ground, the more potential energy due to gravity
A 0.68 kg squirrel is resting on a branch 8 meters above the ground. What is the gravitational potential energy of a squirrel? A: 2.27 J. B :5.44 J. C :21.76 J. D :53.312 J
Answer:
The gravitational potential energy of a squirrel is 53.312 J.
Explanation:
We have,
Mass of a squirrel is 0.68 kg
It is placed at a height of 8 m above the ground.
It is required to find the gravitational potential energy of a squirrel. It is possessed by an object due to its position. Its formula is given by :
[tex]E=mgh\\\\E=0.68\times 9.8\times 8\\\\E=53.312\ J[/tex]
So, the gravitational potential energy of a squirrel is 53.312 J.
Which nanotechnology product would most likely help the
electronics company?
biomaterials
carbon wires
quantum dots
OLEDs
Answer: OLEDs
Explanation:
The nanotechnology uses the surface of the carbon materials to generate the electricity. The evaporation of water on the surface of carbon materials helps in generation of electrical energy due to generation of thermal energy.
OLEDs can be defined as solid-state devices that comprises of organic molecules like carbon that will create electricity by exposing a surface for generation of thermal energy.
10 pts!!!!!! please answer ASAP picture and inscription included
The wavelength of a wave is equal to the distance from one disturbance to
the next and is measured in meters. If the distance between two wave
crests is 2 m, what is the wavelength?
Answer:
2m
Explanation: a crest is a disturbance
Answer:
I think its 4m, but don't quote me. hope I helped
Two types of emission spectra line spectra and continuous spectra
True
False
A car starts from rest and accelerates uniformly to a speed of 72 km per hour over a distance of 500m. calculate acceleration
Answer:
0.4 m/s^2 or 5184 km/h^2
Explanation:
To find the acceleration, given the inicial and final speed of the car, we can use the Torricelli's formula:
V^2 = Vo^2 + 2*a*D
Where V is the final speed, Vo is the inicial speed, a is the acceleration and D is the distance travelled. So, with V = 72 km/h, Vo = 0 (starts from rest) and D = 0.5 km, we have:
72^2 = 0 ^2 + 2*a*0.5
a = 72^2 = 5184 km/h^2
For an acceleration in m/s^2, we should use the speed in meters per second (72 / 3.6 = 20 m/s) and the distance in meters (D = 500):
20^2 = 0^2 + 2*a*500
400 = 1000a
a = 0.4 m/s^2
what type of stars can collapse in a supernova explosion and become neutron stars
Answer:
red supergiants can
Determinați numărul protonilor și cel al neutronilor în nucleul atomului
de beriliu .
Determinaţi structura nucleelor izotopilor de uraniu și de toriu Care forţe se numesc forţe nucleare. Enumeraţi particularităţile forţelor nucleare
Answer:
- Beryllium has 4 protons and 5 neutrons in its nucleus.
- The nucleus of the periodic table isotope of Uranium has 92 protons and 146 neutrons.
The nucleus of the periodic table isotope of Thorium has 90 protons and 142 neutrons.
- Check Explanation
- Check Explanation
In Romanian/In limba romana
- Berilul are 4 protoni și 5 neutroni în nucleul său.
- Nucleul izotopului tabelului periodic al Uraniului are 92 de protoni și 146 de neutroni.
Nucleul izotopului tabelului periodic al Toriului are 90 de protoni și 142 de neutroni.
- Verificați Explicația
- Verificați Explicația
Explanation:
English Translation
- Determine the number of protons and neutrons in the nucleus of the atom of beryllium.
- Determine the structure of the nuclei of the isotopes of uranium and thorium
- Which forces are called nuclear forces.
- List the peculiarities of nuclear forces.
Solution
Note that the number of protons in the nucleus of an atom is the atomic number of that atom.
And the mass number of the atom is the sum of protons and neutrons in the nucleus of the atom.
The nucleus of an atom is the most massive part of an atom containing almost exclusively the neutrons and the protons of the atom.
- Beryllium has an atomic number of 4 and a mass number of 9.
Hence, its number of protons = atomic number = 4
(Number of protons) + (Number of neutrons) = mass number
Number of neutrons
= (mass number) - (Number of protons)
= 9 - 4 = 5
- Uranium has atomic number of 92 and mass number of 238.
Number of protons = 92
Number of neutrons = 238 - 92 = 146
Thorium has atomic number of 90 and a mass number of 232.
Number of protons = 90
Number of neutrons = 232 - 90 = 142 neutrons.
- Nuclear forces are the forces that keep the neutrons and protons of an atom bonded to the nucleus of an atom. The constituents of the atom's nucleus are called nucleons. Nuclear forces are the forces between two or more nucleons.
- The nuclear forces are about 10 million times stronger than the forces that bind atoms together in molecules and compounds.
Hence, massive energies are required to break into the nucleus of atoms.
This is why nuclear reactors produce about a million times more energy per kilogram fuel compared to chemical fuel.
However, the range of the nuclear force is short, only about 10⁻¹⁵ m, beyond which it decreases rapidly.
This is why, in spite of its enormous strength, we do not feel anything of this force on the atomic scale or in everyday life.
In Romanian/In limba romana
Rețineți că numărul protonilor din nucleul unui atom este numărul atomic al acelui atom. Și numărul de masă al atomului este suma protonilor și neutronilor din nucleul atomului. Nucleul unui atom este partea cea mai masivă a unui atom care conține aproape exclusiv neutroni și protonii atomului.
- Beriliu are un număr atomic de 4 și un număr de masă de 9.
Prin urmare, numărul său de protoni = numărul atomic = 4
(Număr de protoni) + (Număr de neutroni) = număr de masă
Numărul de neutroni = (număr de masă) - (Număr de protoni) = 9 - 4 = 5
- Uraniul are numărul atomic de 92 și numărul de masă de 238.
Numărul de protoni = 92
Numărul de neutroni = 238 - 92 = 146
Toriul are un număr atomic de 90 și un număr de masă de 232.
Numărul de protoni = 90
Numărul de neutroni = 232 - 90 = 142 neutroni.
- Forțele nucleare sunt forțele care mențin neutronii și protonii unui atom legați de nucleul unui atom.
Constituenții nucleului atomului se numesc nucleoni. Forțele nucleare sunt forțele dintre doi sau mai mulți nucleoni.
- Forțele nucleare sunt de aproximativ 10 milioane de ori mai puternice decât forțele care leagă atomii împreună în molecule și compuși.
Prin urmare, energiile masive sunt necesare pentru a pătrunde în nucleul atomilor.
Acesta este motivul pentru care reactoarele nucleare produc aproximativ un milion de ori mai multă energie pe kilogram de combustibil în comparație cu combustibilul chimic.
Cu toate acestea, domeniul forței nucleare este scurt, doar aproximativ 10⁻¹⁵ m, dincolo de care scade rapid.
Acesta este motivul pentru care, în ciuda puterii sale enorme, nu simțim nimic din această forță pe scara atomică sau în viața de zi cu zi.
Hope this Helps!!!
Sper că acest lucru vă ajută!!!
Which of the following items are NOT used to create an electric motor?
A. Magnets
B. Electric Current
C. Turbines
D. Copper Wire
Answer:
Option C, Turbines
Explanation:
An electric motor comprise of following components-
a) Magnets
b) Electric wire or solenoid
c) Motor shaft
Turbine is a component of power producing plant that is essential to rotate the shaft of the motor. Once the shaft is rotated, the electric coil placed between the magnets is also rotated. Rotating coil cut the magnetic fields to induce emf and hence electric current is produced from mechanical work (i.e rotation).
Hence, option C is correct
A force of 1000 Newtons is used to push a box on a flat floor. It accelerated at a rate of 5 m/s2. What is the mass of the wagon?
Answer:
67.56kg
Explanation:
Fapp+mg = ma
Fapp= applied force
mg = reactional force
g = acceleration due to gravity
Where g = 9.8m/s^2 a= 5 m/s2, Fapp= 1000N.
1000N = ma + mg
1000N = m( a+g )
1000N = m ( 5+9.8)
1000N = m×14.8
m = 1000÷14.8
m = 67.56kg.
Hence the mass of the wagon will be 67.56kg
terms used to measure motion
Answer:
velocity term
Explanation:
Answer:velocity term
Explanation:
Oliver builds a circuit connecting a light bulb to a battery with wires, leaving a gap in one of the wires. He places several objects across the gap to close the loop. He wants to see which objects allow electricity to flow and turn on the light bulb. Why do some materials allow electricity to flow through while others do not?
A. Electricity will flow if the atoms in the material are bound tightly to each other.
B. Electricity will flow if the atoms in the material are bound loosely to each other.
C. Electricity will flow if the electrons are bound tightly to their atoms in the material.
D. Electricity will flow if the electrons are bound loosely to their atoms in the material.
Answer:
D. Electricity will flow if the electrons are bound loosely to their atoms in the material.
Explanation:
The continuous flow of charges is known as electricity (current). The flow of these charges are due to free or mobile electron within the atoms of the conductors. The materials which will allow current to pass through them, must have free or mobile electrons which are loosely bound to their atoms.
Thus, the correction for this question is "D"
D. Electricity will flow if the electrons are bound loosely to their atoms in the material.
Which change of state is shown in the model?
condensation
evaporation
sublimation
deposition
Answer:
The correct answer to the following question will be Option C (sublimation).
Explanation:
Sublimation seems to be the process in which a substance or a solid changes its sequence from solid to the gaseous without moving via the form of water.From either the framework or method, we have because the category of phase change seems to be sublimation since there is a material altered to something like the gaseous state throughout the solid.Other options aren't connected to the offer scenario. Therefore the answer to the above is the correct one.
why are fuels from crude oil so widely used for transportation
My tooth is aching. Change the noubs on the following sentence in plural and rewrite...
Answer:
My teeth are aching.
Explanation:
Hope helped
Ski lift carry people along 150 m cable up the side of a mountain. Riders are lifted a total of 75 m in elevation. What is the ideal mechanical advantage of the ski lift?
Ideal Mechanical Advantage (IMA) can be found by using the formula:
IMA = ID/OD
ID = Input Distance
OD = Output Distance
In the question, we are given:
ID = 150
OD = 75
Now, solve the expression with what we have.
IMA = 150/75
IMA = 2
Therefore, the IMA is 2.
Best of Luck!
Which of the following statements about developing a personal fitness program is NOT true?
A When developing a personal fitness program, it is important to implement strategies that will help
maintain the program as well as give it a successful start
B. Personal factors such as age, health concerns, and likes are important to consider when developing
a personal fitness program
C. The starting skill level of the physical activities included in a personal fitness program should be
determined from other individuals' fitness programs
D. The FITT principle should be used when developing a personal fitness program,
Please select the best answer from the choices provided
A
B
Save and Exit
Next
Answer:
C
Explanation:
The starting skill level of the physical activities included in a personal fitness program should be determined from other individuals' fitness programs is a statement which is not true. Everyone starts their personal fitness journey at a different level which should be regarded . A fitness test should be taken to determine where an individual should start their new lifestyle.
Answer:
C. I got it right :)
Explanation:
A cooker has a resistance of 100 Ohms and a power rating of 0.5KW. What potential difference would be needed to run the
cooker
Answer:
The potential difference is 224V .
Explanation:
Given that the formula of power is P = I×V and formula of voltage is V = I×R where both I represents current.
Given that the formula of power is P = I×V and formula of voltage is V = I×R where both I represents current. Then you have to use voltage formula to make I the subject :
[tex]v = i \times r[/tex]
[tex]i = \frac{v}{r} [/tex]
So that you can substitute it into the formula of power :
[tex]p = i \times v[/tex]
[tex]p = \frac{v}{r} \times v[/tex]
[tex]p = \frac{ {v}^{2} }{r} [/tex]
Let p = 500W,
Let r = 100Ω,
[tex]500 = \frac{ {v}^{2} }{100} [/tex]
[tex]500 \times 100 = {v}^{2} [/tex]
[tex] {v}^{2} = 50 \: 000[/tex]
[tex]v = \sqrt{50000} [/tex]
[tex]v = 224 \: \: (3s.f)[/tex]
A charged particle of 5.1 nC and another with 2.6 nC are separated by a distance of 5.5 m. What is the electric potential energy between the particles?
Answer:
The electric potential energy between the particles is 2.167 x 10⁻⁸ J
Explanation:
Given;
a charged particle, q₁ = 5.1 nC
another charged particle, q₂ = 2.6 nC
distance between the charged particle, r = 5.5 m
The electric potential energy between the charged particles is calculated as;
[tex]U_E = \frac{kq_1q_2}{r}[/tex]
where;
[tex]U_E[/tex] is the electric potential energy between the particles
k is coulomb's constant = 8.99 x 10⁹ Nm²/c²
Substitute the given values and solve for electric potential energy;
[tex]U_E = \frac{kq_1q_2}{r} = \frac{8.99*10^{9}*5.1*10^{-9}*2.6*10^{-9}}{5.5} \\\\U_E = 2.167 *10^{-8} \ J[/tex]
Therefore, the electric potential energy between the particles is 2.167 x 10⁻⁸ J
Diffraction of white light with a single slit produces bright lines of different colors.What is the color of the central image?
Answer:
white
Explanation:
This experiment causes lines of different colors because the constructive interference depends on the wavelength, so for different wavelength, the position of the maximum will be different.
Now, in diffraction fo a single slit we always have a central maximum (for all the colors)
This means that after the diffraction, we will have that all the colors have a maximum in the center, which will produce white light again, then the color of the central image is white
A sphere of radius 10.0cm is moulded into a uniform cylindrical wire of same radius r calculate length in millimeters
Answer:
133.33 mm
Explanation:
First we need to find the volume of the sphere. The volume of a sphere is given by:
V = (4/3) * pi * r^3
With a radius of 10 cm, we have:
V = (4/3) * pi * r^3 = 4188.79 cm3
The sphere will be moulded into a cylinder, so the volume will be the same. The volume of a cylinder is:
V = pi * r^2 * h
Where h is the height of the cylinder, and for this case, it will be the length.
The radius is the same old radius, so we have:
4188.79 = pi * 10^2 * h
h = 4188.79 / 100pi = 13.3333 cm
In millimeters, we have h = 133.33 mm
What is the critical angle for glass when the refractive index is 1.45
Answer:43.6°
Explanation:
Refractive index=n=1.45
Critical angle=c
n=1/sinc
1.45=1/sinc
Cross multiply
1.45sinc=1
Divide both sides by 1.45
(1.45sinc)/1.45=1/1.45
sinc=0.6897
c=sin(inverse)(0.6897)
c=43.6°
Critical angle is 43.6°
