Answer:
i not sure
Explanation:
I need help QUICK!! 20 points
Which of the following is/are formed as gravity pulls increasing amounts of dust and debris in a nebula together?
a. the solar wind
b. meteors
c. planetesimals
d. meteorites
describe one example of light being refracted in the living room
Answer:
television
Explanation:
a television refracts light (the light bounces off of the screen
Answer:
Suppose you have a glass slab as a paper weight, if you keep it on the paper, dont you see something strange? The paper becomes elevated in the glase slab. Everyone sees a waterbottle or glass everyday, while seeing through it, does everything seem normal? Nope. That's refraction.
Explanation:
You must have seen a prism, right? It makes light split into the visible electromagnetic spectrum.
Answer in the proper number of significant numbers
23.4 x 14
Answer:
327.6 is the answer but there is 2 sig figs in 14 so change it to 330
so 330 is the final answer
hope this helps
have a good day :)
Explanation:
The multiplication product of 23.4 × 14 is 327.6. However, there is only two significant figures in 14. So we have to take the answer in 2 significant figure. Hence, the product can be written as 3.3 × 10².
What are significant figures ?Significant figures are number of digits which can be counted as certain values associated with some uncertainties as well. There are certain rules regrading the count of significant figures in a number.
The zeros after a non-decimal number cannot be taken as significant. For eg, in 4500, there are only two significant figures. The common rule for all the arithmetic operation is that, the significant figures in the product have to be equal to the number of significant figure in the number in the operation with least significant figures.
Here, the one with least significant figures is 14. It have two significant figures. Now, product of the two numbers is :
23.4 × 14 = 327.6
But the rounded product for correct significant figure is 3.3 × 10².
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What occurs when light bends while passing from one medium to another?
Answer:So the answer is B
Explanation: When the light rays either bend or change their direction while passing from one medium to another it is called refraction of light. The refraction of light takes place when light travels from air into glass, from glass into air, from air into water or from water into air.
Electricity that comes into our homes from the grid is known as:
A. Static electricity
B. Resistance
C. Current electricity
D. Charge
Un objeto de 200 gramos está amarrado del extremo de una cuerda y gira describiendo un círculo horizontal de 1.20 m de radio a razón de 3 rev/seg la tensión en la cuerda es?
Answer:
La tensión es 85.3 N.
Explanation:
Cuando el objeto gira en dirección horizontal, la sumatoria de fuerzas se puede calcular usando la segunda ley de Newton:
[tex] \Sigma F_{x} =ma_{c} [/tex]
[tex] T = ma_{c} [/tex]
Dado que el movimiento es horizontal, el peso (que está en el eje y) no contribuye en la sumatoria de fuerzas en el eje x. Por lo que la única fuerza actuando sobre el objeto en la dirección del movimiento es la tensión.
En donde:
m: es la masa del objeto = 200 g = 0.200 kg
[tex]a_{c}[/tex]: es la aceleración centrípeta
La aceleración centrípeta viene dada por:
[tex]a_{c} = \omega^{2} r[/tex]
En donde:
ω: es la velocidad angular del objeto = 3 rev/s
r: es el radio = 1.20 m
Entonces, la tensión es:
[tex]T = m\omega^{2} r = 0.200 kg(3\frac{rev}{s}*\frac{2\pi rad}{1 rev})^{2}*1.20 m = 85.3 N[/tex]
Por lo tanto, la tensión es 85.3 N.
Espero que te sea de utilidad!
HELP ASAP Miguel claims that as a ball falls, it loses potential energy. Izzy claims that as a ball falls, it
gains kinetic energy. Can both students be correct? Describe the evidence which would support
either student.
Answer and Explanation:
They are both correct.
This is because potential energy is when there is potential for the object to have energy, while kinetic energy is energy that is moving already.
So, as the ball falls, it loses its potential energy, or "still/Stalled" energy, and gains kinetic energy, or moving energy.
#teamtrees #PAW (Plant And Water)
what is the definition for speed?
Explanation:
the rate at which someone or something moves or operates or is able to move or operate.
Determine la inercia rotacional de una varilla de 4 m de largo y 2 Kg de mesa si su eje de rotación esta situado a la mitad de la varilla.
Answer:
I = 2.667 kg m²
Explanation:
The moment of inertia of a body can be calculated by the expression
I = ∫ L² dm
For high symmetry bodies the expressions of the moment of inertia are tabulated, for a rod with its axis of rotation at its midpoint it is
I = [tex]\frac{1}{12}[/tex] m L²
let's calculate
I = [tex]\frac{1}{12}[/tex] 2 4²
I = 2.667 kg m²
what happens when a sample of water turns to ice
[tex]\huge{\underline{\underline{\mathrm{\color{red}{AnswEr}}}}}[/tex]
As a sample of water turns to ice, A new molecules are formed.
order the phrases
Using the phrases in the box above, fill in the blank below to put the phrases in the correct order (# 11 - 14) Follow the arrows!
How many electrons are contained in 1.0 C of charge? What is the mass of the electron in 1.0C of charge?
There are approximately 6.24 x 10¹⁸ electrons contained in 1.0 C of charge. The mass of the electron in 1.0 C of charge remains the same as the mass of an electron, which is approximately 9.109 x 10⁻³¹ kg.
We may utilise the elementary charge, which represents the charge of a single electron, to calculate how many electrons are present in 1.0 C of charge. It is estimated that the elementary charge is 1.602 x 10-19 C.
Number of electrons = Charge ÷ Elementary charge
Number of electrons = 1.0 C ÷ (1.602 x 10⁻¹⁹ C)
Calculating the division:
Number of electrons ≈ 6.24 x 10¹⁸ electrons
Therefore, there are approximately 6.24 x 10¹⁸ electrons contained in 1.0 C of charge.
It is crucial to remember that the electron's mass is unaffected by the charge when considering the electron's mass in 1.0 C of charge. Regardless of the charge it carries, an electron has a mass of about 9.109 x 10⁻³¹ kg.
Thus, the mass of one electron, which is roughly 9.109 x 10⁻³¹ kg, remains constant in 1.0 C of charge.
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The unit of area is called derived unit, why?
Answer:
Because the unit of area depends upon the other fundamental units.
Explanation:
Unit of Area = m^2
actual metre is the unit of length.
so metre × metre makes ?^2
Part D
From this data, how many male, female, adult, and baby mountain goats do you predict are in the park?
Answer:
80
Explanation:
I literally just did this question lol I hope I helped
In an ecosystem having a park, from the given data there are 71 male,93 female, 103 adults and 61 baby goats in the park.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Which of the following correctly describes how particular type of mirror reflects light? Convex mirrors reflect light to a central point (converging). Concave mirrors reflect light to a central point (converging). Concave mirrors reflect light so the light spreads out (diverging).
Answer:
Concave mirrors reflect light to a central point (converging)
Suppose the source is to the left of the mirror in question.
Parallel rays into the mirror are always reflected towards the focal point.
In the case of a concave mirror the real parallel rays pass thru the focal point.
If the mirror is convex the rays will diverge to the left and act as if they were emanating from the focal point to the right of the mirror.
TENIENDO EN CUENTA LA FORMULA DE INTENSIDAD PARA B=4, Y I=10⁻9W/M²
A. 2,51X10⁻⁹W/M²
B. 3,16X10⁻⁷W/M²
C. 20X10⁻⁹W/CM²
D. 31,6X10⁻⁹W/CM²
The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.
Answer:
The answer is below
Explanation:
A diver works in the sea on a day when the atmospheric pressure is 101 kPa. The diver uses compressed air to breathe under water. 1700 litres of air from the atmosphere is compressed into a 12-litre gas cylinder. The compressed air quickly cools to its original temperature. Calculate the pressure of the air in the cylinder.
Solution:
Boyles law states that the volume of a given gas is inversely proportional to the pressure exerted by the gas, provided that the temperature is constant.
That is:
P ∝ 1/V; PV = constant
P₁V₁ = P₂V₂
Given that P₁ = initial pressure = 101 kPa, V₁ = initial volume = 1700 L, P₂ = cylinder pressure, V₂ = cylinder volume = 12 L. Hence:
P₁V₁ = P₂V₂
100 kPa * 1700 L = P₂ * 12 L
P₂ = (100 kPa * 1700 L) / 12 L
P₂ = 14308 kPa
What is one characteristic of the organization of the Periodic Table?
Atoms of elements with the same electron configuration are organized in columns.
Elements are organized in alphabetical order.
Atoms of elements with the same atomic number are organized in diagonals.
Atoms of elements with the same volume are organized in columns.
Answer:
Atoms of elements with the same electons in the outer most shell they are put in the same group on the periodic table
What is biomass energy?
a. Energy harvested from plant material
b. Energy harvested from recycled petroleum O c. Energy harvested from synthetic oil
d. Energy harvested from wind
Answer:
A.
Explanation:
Biomass energy can be harvested from plants, wood, waste, and living or once living organisms.
~ LadyBrain
Processing Questions:
Directions: Answer the questions below on a clean sheet of paper.
1. How was the result of your physical fitness test in Flexibility and muscular
strength compared to your previous assessments?
2. Did you notice some improvements? If no, what do you need to do to improve
it?
Answer:
How was the result of your physical fitness test in Flexibility and muscular
strength compared to your previous assessments?
Explanation:
A scientist wants to learn about Earth's oceans. Which of the following
spheres should she most directly study? (2 points)
Oa
Atmosphere
Ob
Cryosphere
Oc
Geosphere
Od
Hydrosphere
If the mass of an object is 5 kg, the gravitational field strength is 2 and the change in height is 5 m, what is the change in gravitational potential energy stored?
Answer:
50joules
Explanation:
See the explanation from the image I have provided above.
Answer:
50j
Explanation:
Plz someone help me Asap
Answer:
all I know is C
are there more questions? anyone?
-KARL IS STOOPID
Explanation:
Which are examples of a medium?
Answer:
One example of a medium is air.
Explanation:
Answer:
An example? I mean if we're going for an example, I'd say middle, Or balanced.
A vector has an x-component
of 19.5 m and a y-component
of 28.4 m.
Find the magnitude of the
vector.
Answer:
34.45m
Explanation:
Magnitude of a vector is equal to the square root of sum of squares of x & y vectors.
Magnitude = [tex]\sqrt({x^2} + {y^2})[/tex]
= [tex]\sqrt({19.5^2} + {28.4^2})[/tex]
=34.45m
Which of the following are steps for balancing chemical equations?
A. Add all the elements together.
B. Count the atoms in each substance in the reactants and products.
C. Subtract the total amount of elements from the products.
D. Write the chemical equation using formulas and symbols.
Discuss advantages and disadvantages of tissue culture.
Answer:
Explanation:
ADVANTAGES OF TISSUE CULTURE
There are several advantages to using the tissue culture process. We already mentioned its effectiveness in helping developing countries to increase food production, but what are some other advantages that may be relevant to you?
The new plantlets can be grown in a short amount of time.
Only a small amount of initial plant tissue is required.
The new plantlets and plants are more likely to be free of viruses and diseases.
The process is not dependant on the seasons and can be done throughout the year.
You need only a relatively small space to perform the process (ten times the plants in one-tenth of the space).
On a larger scale, the tissue culture process helps to supply the consumer market with new subspecies and variety.
People looking to cultivate challenging plants such as specific breeds of orchid find more success with the tissue culture process than traditional soil.
DISADVANTAGES OF TISSUE CULTURE
Tissue Culture can require more labor and cost more money.
There is a chance that the propagated plants will be less resilient to diseases due to the type of environment they are grown in.
It is imperative that, before being cultured, the material is screened; failure to pick up any abnormalities could lead to the new plants being infected.
While the success rate is high if the correct procedures are followed, success with the tissue culture is not a guarantee. There is still a chance that the process triggers a secondary metabolic chemical reaction, and the new explants or cells' growth gets stunted, or even die off.
An electron in a hydrogen atom drops from the n= 3
energy level to the n=2 energy level. The energy of
the emitted photon is
A) 1.89 eV
C) 1.51 eV
B) 3.40 eV
D) 4.91 eV
Answer: D) 4.91 eV
Explanation:
Which of the following is true concerning hurricanes?
a. They tend to deposit more sediment than they remove.
b. Their storm surges cause widespread flooding.
c. They have fast, but generally weak wind gusts.
d. They do not alter landscapes significantly.
Answer:
B.
Explanation:
B. is correct because every time usually when a hurricane hits it causes flooding causing multiple homes to be ruined. It is a known fact that usually hurricanes start close or in along with tornadoes, the water, meaning once they hit land they have some water to flood that land with.
C. is absolutely false hurricanes have VERY strong wind gusts.
D. is absolutely wrong they do alter landscapes by ripping trees and plants and houses out of the ground making the landscapes look different.
A. is wrong they tend to deposit and remove sediment evenly.
~ LadyBrain
Answer:
B
Explanation:
A mountain climber increases their height from 200 meters to 400 meters. What affect will this have on their potential energy?
Answer:
At 400 m the potential energy of the mountain climber doubled the initial value.
Explanation:
Given;
initial height of the mountain climber = 200 m
final height of the mountain climber, = 400 m
The potential energy of the mountain climber is calculated as;
Potential energy, P.E = mgh
At 200 m, P.E₁ = mg x 200 = 200mg
At 400 m, P.E₂ = mg x 400 = 400mg
Then, at 400 m, P.E₂ = 2 x 200mg = 2 x P.E₁
Therefore, at 400 m the potential energy of the mountain climber doubled the initial value.
