Answer:
80 amperes
Explanation:
Current = Voltage/Resistance
160/2 = 80
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°
what type of stars can collapse in a supernova explosion and become neutron stars
Answer:
red supergiants can
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
Which statement is NOT an advantage of renewable resources? A They produce clean energy. B They are expensive to collect and transform into energy. C They are safe for the environment. D They replenish quickly.
Answer:
B. They are expensive to collect and transform into energy.
Explanation:
All of the other options are positive aspects of renewable resources. B is the only disadvantage of renewable resources given in the question.
Answer:
They are expensive to collect and transform into energy.
Explanation:
Edge
Rohit placed a pencil perpendicular to principal axis in front of a converging
mirror of focal length 30 cm. The image formed is twice the size of the pencil.
Calculate the distance of the object from the mirror.
Answer:
45 cm ( in my opinion)♀️
Explanation:
( Using the mirror formula)
1/ u + 1/v = 1/f
( introducing magnification; m into the formula )
u( 1/u + 1/v ) =u×1/f
1 + u/v =u/f
( But u/v =1 ÷v/u= 1/m)
1 +1/m =u/f
(Supposing m is actually equal to 2, and f =30 cm, then;)1 + 1/2 =u/30
2+1= u/15
3=u/15
3×15=u
45 cm=u
A 1 kg ball is rolling at 3 m/s.
Answer:
It will roll 9 meters in 3 seconds
Explanation:
3 m/s times 3 is 9
Thanks for warning me.
I'll be careful to stay out of its way.
Do you have a question to ask ?
Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas
v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1)
where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. Record these velocities, to two decimal places, in Table E
The first and second velocities of the car, with four washers attached to the pulley, are both 0.125 m/s.
We must apply the following calculations to determine the car's first and second velocities with the four washers attached to the pulley:
v1 = 0.25 m / t1
v2 = 0.25 m / (t2 - t1)
Here, t1 denotes the typical time needed for the car to go 0.25 metres, and t2 is the typical time needed to travel 0.50 metres.Let's say that t1 and t2 are the typical times, each lasting two seconds on average.The first formula allows us to determine v1:
v1 = 0.25 m / 2 s = 0.125 m/s
Using the second formula, we can calculate v2:
v2 = 0.25 m / (4 s - 2 s) = 0.125 m/s
Table E can be used to record these values as the velocities at the relevant distances.
for such more questions on velocities
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why are fuels from crude oil so widely used for transportation
Why is raw sewage a major pollutant in some countries but not in developed countries?
Answer:because developed cities are more equipped to deal with raw sewage than less developed cities
Explanation:
How old does an individual need to be in the United states to purchase any tobacco products
Answer: 18 years of age
Explanation:
A trip is taken that passes through the following points in order
Point A 0 m
Point B 15.0 m
Point C -30.0 m
Point D -20.0 m
Point E 10.0 m
Point F 5.0 m
What is the distance from Point C to Point E?
answers :
20.0 m
40.0 m
-20.0 m
10.0 m
Answer:
40.0 m
...............
Answer:
35
Explanation:
Do u think the benefits of nuclear energy outweigh the dangers
Answer:
While there is no such thing as 100 percent safe, having nuclear energy is much safer than you think. It's thousands of times safer than conventional coal and other fossil-fuel-derived energy, not to mention the specter of environmental disaster from continued use of carbon-based energy sources.29 may. 2011
Explanation:
I hope it helps you
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!
terms used to measure motion
Answer:
velocity term
Explanation:
Answer:velocity term
Explanation:
Which biome contains mostly coniferous trees and receives 35 to 100 cm of rain per year?
The question is incomplete as it does not have the options which are:
deciduous forest
taiga (boreal forest)
temperate rainforest
tropical rainforest
Answer:
Taiga (boreal forest)
Explanation:
A Biome refers to the habitat which is occupied by flora and fauna living in similar conditions. These biomes are distinguished based on many features like precipitation, temperature and many other physical factors.
In the given question, the biome which receives an annual rainfall of 35 to 100 cm annually and is mostly covered by the coniferous trees is known as "Taiga biome" which is also known as Boreal forest.
The Taiga biome is one of the largest terrestrial biomes which is present in Eurasia and North America. The biome is characterised by the conifers trees and therefore is also known as the Coniferous trees.
Thus, Taiga (boreal forest) is the correct answer.
Answer: Taiga(boreal forest)
Explanation:
Meeta used an elastic tape to measure the length of her window to stitch a curtain. Do you think she will be able to stitch a curtain of correct measurement? Yes/No . Give scientific reason in detail, also explain the correct method to measure the length of her window.
Answer:
No
Explanation:
She will not be able to measure the length of her window accurately due to instrumental error from her choice of instrument. The elastic nature of her tape would alter the measurement because it will stretch as she is taking her readings, thus reducing the true measurement of the length of her window.
To measure the length of her window, she could use an inelastic tape rule or a metre rule. These instruments would eliminate instrumental error.
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:
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
When using the lens equation, a negative value as the solution for d baseline i indicates that the image is
A. real
B. virtual
C. upright
D. inverted
When using the lens equation, a negative value as the solution for d baseline i indicates that the image is Virtual. The correct option is B.
What is reflection?When a light strikes on a shiny surface, it reflects back the light ray in the same medium. The phenomenon is called reflection and the ray is called the reflected ray.
From the Len's maker formula, e have
1/f = 1/u + 1/v
where f = radius of curvature /2
So, the negative value as the solution for d baseline i indicates that the image is Virtual.
Thus, the correct option is B.
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Some drops a ball off of the top of a 125-m-tall building. In this prob-lem, you will be solving for the time it takes the ball to hit the ground.(a)Define your coordinate system, be thorough.(b)Write down the given infor-mation, be sure to include hidden information.(c)State what physics principleis at play here. How do you know this?(d)Select an equation.(e)Solve forthe time it takes for the ball to hit the ground.
Answer:
t = 5.05 s
Explanation:
This is a kinetic problem.
a) to solve it we must fix a reference system, let's use a fixed system on the floor where the height is 0 m
b) in this system the equations of motion are
y = v₀ t + ½ g t²
where v₀ is the initial velocity that is v₀ = 0 and g is the acceleration of gravity that always points towards the center of the Earth
e) y = 0 + ½ g t²
t = √ (2y / g)
t = √(2 125 / 9.8)
t = 5.05 s
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!!!
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
Chris has a part time job as a cannon ball catcher for the circus. One day he was located an unknown distance away from the cannon. A cannonball was fired from the cannon at 425 m/s. The speed of sound was 345 m/s. Unfortunately the cannonball went past Chris 0.20 s before he heard the sound of the blast. How far away was the cannon from Chris?
show work with answer for brainliest plz
Answer: 366.56 meters.
Explanation:
Velocity of the cannon ball = 425m/s
Velocity of sound = 345 m/s
For the "position" of both, we have the equation:
Pc = 425m/s*t
Ps = 345m/s*t
Where t is time in seconds.
If the position of Chris is X, we have that if the ball reaches the position of Chris in T seconds, then the soundwave reaches the position of Chris in T + 0.20 seconds, we can write this as:
425m/s*T = X
345m/s*(T + 0.20s) = X
Now we can solve this system of equations. First we can replace the first equation in the second equation and get
345m/s*(T - 0.20s) = 425m/s*T
Now we solve this for T.
345*T + 69 = 425*T
69 = (425 - 345)*T = 80*T
T = 69/80 = 0.8625 seconds.
Now we replace this in the first equation and get:
X = 425m/s*T = 425m/s*0.8625s = 366.56 meters.
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
Object A has a mass of 10 kg and is moving at a velocity of 2.0
m/s. So Object A's momentum is - kg. m/s.
Answer:20kgm/s
Explanation:
Mass=10kg
Velocity=2m/s
Momentum=mass x velocity
Momentum=10 x 2
Momentum=20
Momentum=20kgm/s
The object with mass m when moving with the velocity, its momentum can be calculated. The momentum of the object A is 20 kg.m/s.
What is momentum?Momentum is the product of mass and velocity of a moving object.
If the momentum is p, the mass of the object is 10 kg and the velocity is 2.0 m/s, then the momentum will be
p = 10 × 2.0
p = 20 kg.m/s
Thus, the momentum of the object A is 20 kg.m/s
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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.
A chocolate wrapper is 6.7 cm long and 5.4 cm wide. Calculate its area up to
reasonable number of significant figures.
IS IT right to the left a b c d
Answer:
c ok
Explanation: right?
Answer:
16
Explanation:
El coeficiente de variación de la resistencia con la temperatura del carbón es -0.0005/°c.Si la resistencia de una resistencia de carbón es de 1000 a0°c , determine su resistencia a 120°c
Answer:
R (120) = 940Ω
Explanation:
The variation in resistance with temperature is linear in metals
ΔR (T) = R₀ α ΔT
where α is the coefficient of variation of resistance with temperature, in this case α = -0,0005 / ºC
let's calculate
ΔR = 1000 (-0,0005) (120-0)
ΔR = -60 Ω
ΔR = R (120) + R (0) = -60
R (120) = -60 + R (0)
R (120) = -60 + 1000
R (120) = 940Ω
Hydrogen is a nonmetal with many nonmetal properties. Why is it on the periodic table with the metals in Group 1?
Answer:
This is because it has ns1 electron configuration like the alkali metals.
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