Answer:
D. all the above
Explanation:
Took the quiz.
Answer: D) all the above
Explanation: :)
PLS HELP!!!! the image shows a chart to help!!
-The question is, "The following equations represents Chemical reactions. Which equation shows at the total mass during a chemical reaction stays the same?"
answer choice are:
A. equation 2
B. equation 1
C. equation 3
D. equation 4
A 50 KG girl on a swing is pushed with a net force of 200 N. What is the girl’s acceleration?
Answer:
a = 4 m/s2
Explanation:
Given: 200 N, 50 kg
To find: a
Formula: [tex]A = \frac{f}{m}[/tex]
Solution: To find a, divide the force by the weight
A = F ÷ m
= 200 ÷ 50
= 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 5kg object is moving downward at a speed of 12m/s. If it is currently 2.6m above the ground, what is its kinetic energy?
Answer:
360J
Explanation:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest.
Make a list of all the possible human sources of carbon dioxide
Answer:
car fuel
production waste (like producing plastic, car, materials)
breathing
landfill
cement production
deforestation (cutting down trees)
burning of fossil fuels (coals, oil, natural gases)
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Explanation:
What is the velocity of position A and B?
answer please
Answer:
A = 15 m/s , B = 18.75 m/s
Explanation:
from the velocity is equal to zero ( at rest ) , you see that velocity is increasing by 3.75 m/s for each second.
I hope that it's a correct answer.
Which statement is false?
A) The direction a magnet moves through a coil of wire determines the direction of the
electric current
B) The direction a coil of wire moves through a magnetic field determines the direction
of the electric current.
C) Current will flow through a wire as long as the magnetic field around the coil is
changing
D) Current will not flow though a wire if the magnet is outside the coil.
Answer:
D. Current with not flow through a wire if the magnet is outside the coil.
Explanation:
have a good day
The movement of the electrons caused by the magnetic field's pull on them causes an electric current to flow through a wire coil when it is passed over a stationary bar magnet, hence option D is correct.
What is a magnetic field?It is possible to think of the magnetic field as a scalar object with a single magnitude in space.
The magnetic field is described as a field around a magnet that exerts a magnetic force on electrically charged particles present in the magnetic field. Teslas are a unit of measurement for the magnetic field.
Magnetic fields, or vector fields, have an impact on electric currents, electric charges, and magnetic materials. In a magnetic field, a moving charge experiences an external force that is perpendicular to the magnetic field and has its own velocity.
Therefore, current will not flow through a wire if the magnet is outside the coil is a false statement.
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4) Based on your results, what can you infer about the distribution of
touch receptors on the skin?
Answer:
what are the results? Also
Explanation:
The distribution of touch receptors in human skin is not consistent over the body. In humans, touch receptors are less dense in skin covered with any type of hair, such as the arms, legs, torso, and face. If two points are felt as two separate points, each is in the receptive field of two separate sensory receptors.
How does the motion of the molecules change when you increase the temperature
Answer:
They speed up as temperature increases.
Explanation:
As temperatures increases within a molecule the particles will speed up.
A proton is moved so that its electric potential energy increases from 2.0 × 10-18 J to 6.0 × 10-18 J. The magnitude of the charge on a proton is 1.602 × 10-19 C.
The electric potential difference through which the proton moved, to the nearest whole number, is
V.
Answer:
25v
Explanation:
right on edge
what three types of electromagnetic waves carry most of the sun's energy that strikes Earth. Do Not Send Me A Link.
Answer:
The answer is C.
Answer:
The answer would be the second one I'm pretty sure.
Explanation:
Determine the resistance of 100m of copper cable whose cross-sectional area is 1.5mm2
i know this is easy but i’m am just not sure
Answer:
kinetic energy
Explanation:
vinegar and baking soda are composed of atoms which react to each other when mixed therefore they convert the potential energy inti kinetic energy.
A worker begins pushing a 60-kg crate across the floor with a force of 86N, causing an acceleration of 0.20m/s2 what is the force of friction ?
An object has a mass of 10grams and a volume of 20m3. what is the density of the object
Explanation:
density = mass/ volume
in the question the mass is given in grams so will convert it into kg,
10 g = 0.01 kg
density= 0.01/ 20 = 1 / 2000 = 0.005 kg/m^3
anyone pls ASAP it’s so important I will give brainlist or anuthing pls
Which has a higher temperature: a snowman or a lit match ?
Answer:
snowman
Explanation:
the snowman has more heat energy as it has more molecules whilst the burning match has less. therefore its has more total kinetic (moving) energy
What is density?
A- How much space an object takes
up
B- The amount of matter in a certain
amount of space
C- How much water an object
displaces
D- How much an object is affected by
gravity
Answer:
B- The amount of matter in a certain
amount of space
Explanation:
Density is the amount of matter an object has in a certain space. To find density, divide the mass of an object by the volume of an object.
Answer:
C- How much water it displaces
Explanation:
what is the difference between atoms and ions
Answer:
[tex]{\huge\purple{\fbox{{࿐αɴѕωєя࿐}}}}[/tex]
[tex] \huge\red{\boxed{\mathfrak{Atoms}}}[/tex]
The smallest unit of an element.Not independent in solution.Atoms form molecules.Electrons and protons are equal.Unstable in nature.[tex] \huge\red{\boxed{\mathfrak{Ions}}}[/tex]
Single particle or collection of particles.Is independent in solution.Ions form electrovalent bond.Electrons and protons are unequal.Stable in nature.✏ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ
[tex] \huge\blue{ \mid{ \underline{ \overline{ \tt ꧁❣ RainbowSalt2222 ࿐ }} \mid}}[/tex]
3. What does an object at rest and an object moving at constant velocity have in common?
Heat is a measure of how much energy flows from __________ objects to _________ objects. It _________ the same thing as temperature.
Answer:
heat is a measure of how energy flows from hot to Cold object. It means the same thing as temperature
Heat is a measure of how much energy flows from hotter objects to cold objects. It flow the same thing as temperature.
What is Temperature ?Temperature is a physical quantity which measures hotness and coldness of a body. Temperature measures the degree of vibration of molecule in a body. Temperature is measured in centigrade (°C), Fahrenheit (°F) and Kelvin (K) in which Kelvin (K) is a SI unit of temperature. Absolute scale of temperature means Kelvin scale of temperature. relation between Kelvin(K) and centigrade (°C), °C= K - 273.15 from equation, 273.15 K means 0 °C, which is freezing point of water (ice). when we give temperature to the body, its molecule or atom absorbs thermal energy and vibrate about their mean position. Amplitude of vibration get increases as we go on increasing temperature and for higher temperature force of attraction between molecules gets weaker. Hence for higher temperature, due to weaken the force of attraction between molecule, solid goes into liquid state. and further increase in temperature liquid goes into gaseous state.
Heat flows from high temperature to low temperature
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The eye of the Atlantic giant squid has a diameter of 3.50 × 10^2 mm. If the eye
is viewed in a concave mirror with a radius of curvature equal to the diameter
of the eye and the eye is 0.800 × 10^3 mm from the mirror, how far is the image
from the mirror? What is the size of the image? Is the image real or virtual?
Answer:
q = 224 mm, h ’= - 98 mm, real imagen
Explanation:
For this exercise let's use the constructor equation
[tex]\frac{1}{f} = \frac{1}{p} + \frac{1}{q}[/tex]
where f is the focal length, p and q are the distance to the object and the image respectively.
In a mirror the focal length is
f = R / 2
indicate us radius of curvature is equal to the diameter of the eye
R = 3,50 10² mm
f = 3.50 10² /2 = 1.75 10² mm
they also say that the distance to the object is p = 0.800 10³ mm
1 / q = 1 / f - 1 / p
1 / q = 1 / 175 - 1 /800
1 / q = 0.004464
q = 224 mm
to calculate the size let's use the magnification ratio
m = [tex]\frac{h'}{h} = - \frac{q}{p}[/tex]
h '= [tex]- \frac{q}{p} \ h[/tex]
h ’= - 224 350 / 800
h ’= - 98 mm
in concave mirrors the image is real.
Eye at the lowest radiated power of 1,2 x10 x (- 17) W. Determine how many photons of light with a wavelength of 500nm fall on the retina of the eye every second
Answer:
[tex]\frac{n}{t} = 30\ photons/s[/tex]
Explanation:
The radiated power can be given in terms of the wavelength as follows:
[tex]Rasiated\ Power = \frac{nE}{t} = \frac{nhc}{\lambda t}[/tex]
where,
Radiated Power = 1.2 x 10⁻¹⁷ W
n = no. of photons = ?
h = plank's constant = 6.625 x 10⁻³⁴ J.s
c = speed of light = 3 x 10⁸ m/s
λ = wavelength = 500 nm = 5 x 10⁻⁷ m
t = time
Therefore,
[tex]1.2\ x\ 10^{-17}\ W = \frac{n(6.625\ x\ 10^{-34}\ J.s)(3\ x\ 10^8\ m/s)}{(5\ x\ 10^{-7}\ m)(t) }\\\\\frac{n}{t} = \frac{1.2\ x\ 10^{-17}\ W}{3.975\ x\ 10^{-19}\ J}\\\\\frac{n}{t} = 30\ photons/s[/tex]
How is the electroscope an example of a conductor?
Answer: Its in explanation.
Explanation:
Because the electroscope is made from conducting material, some of its electrons move up to the top of the electroscope to be near the charged rod when the rod is held close.
Answer:
Because it is made up of conducting materials
Which of the following is not a product of photosynthesis?
A.) Glucose
B.) Carbon Dioxide
C.) Sugars
D.) Oxygen
Answer:
B
Explanation:
I just learned about it on edge.
3. When you threw the ball upward at 40 m/s, how much time would have
passed from when you threw it to when you catch it? *
2 seconds
4 seconds
8 seconds
12 seconds
Which of the following is a result of a limiting factor in an ecosystem?
a. A pond has only produced a small amount of algae, so the fish population is also small.
b. The weather was extra humid last summer and there were more mosquitos than ever before.
c. A farmer planted new grass and months later his animals looked healthier than they’ve looked in years.
d. This year, ticks are supposed to be worse than in previous years, with a huge number of them carrying Lyme Disease.
Answer:A - a pond has only produced a small amount of algae, so the fish population is also small. i’m pretty sure that’s correct.
Explanation: The amount of alage determines the size,or carrying capasity of the fish population,so it is a limiting factor.
Hope I could help!Brainlist?plz
Question 1
4
An object is located 90 m in front of a lens. An image is produced 40 m away from the
lens. What is the focal length of the lens?
O 15.3 m
0.025 m
O 27.7 m
O .011 m
A gas of volume 2 m^3 at 27°C is (a) heated to 327°C, (b) cooled to - 123°C, at constant pressure.What are its new volumes?
Answer:
A. 4 m³
B. 1 m³
Explanation:
A. Determination of the new volume.
Initial Volume (V₁) = 2 m³
Initial temperature (T₁) = 27 °C + 273 = 300 K
Final temperature (T₂) = 327 °C + 273 = 600 K
Final volume (V₂) =?
V₁ / T₁ = V₂ / T₂
2 / 300 = V₂ / 600
Cross multiply
300 × V₂ = 2 × 600
300 × V₂ = 1200
Divide both side by 300
V₂ = 1200 / 300
V₂ = 4 m³
B. Determination of the new volume.
Initial Volume (V₁) = 2 m³
Initial temperature (T₁) = 27 °C + 273 = 300 K
Final temperature (T₂) = –123 °C + 273 = 150 K
Final volume (V₂) =?
V₁ / T₁ = V₂ / T₂
2 / 300 = V₂ / 150
Cross multiply
300 × V₂ = 2 × 150
300 × V₂ = 300
Divide both side by 300
V₂ = 300 / 300
V₂ = 1 m³
Which type of comb would be best to use in the winter, a plastic comb or a glass comb? Explain using the Triboelectric series.
Answer:
I'm not sure how to use it using the Series, but it would be the plastic comb
Explanation:
In the winter, it's likely to be cold and the glass would absorb that energy, also making it cold. in order to be able to hold it, you would need something warm, thus making the plastic one the better option as it is less likely to absorb the cold energy
A ray of light travels through air (n = 1.00) and
approaching the boundary with water (n =
1.33). The angle of incidence is 45.0°.
Determine the angle of refraction.
Answer:
32.1176°
Explanation:
In the picture above, I hope that it's a correct answer.
From the Snell's law, the angle of refraction will be 32.117°.
What is Snell's law?The Snell's law states that the ratio of sine of angle of incidence and angle of refraction is equal to the ratio of refractive index of second medium to the first medium.
sin i/sin r = n(water) / n(air)
r =sin⁻¹ (sin 45 x 1/ 1.33)
r =32.117°
The angle of refraction is 32.117°.
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