Answer:
ooops ignore this it wont let me leave this screen it does this weirdly s
Explanation:
Which of the following statements about waves are true? Select all that apply.
O
Sound waves cannot travel through empty space.
Sound waves can travel through liquids.
Light waves are not true waves.
Light waves need matter in order to travel.
Waves can only move matter up and down or from side to side.
Answer:
Sound waves cannot travel through empty space
sound can travel through liqui
Sound waves cannot travel through empty space but can travel through liquids. Waves make the particles of matter up and down but do not along with them. The light waves are not true mechanical waves. Therefore, options (A), (B), (C), and (E) are correct.
What are sound waves?Sound can transmit through liquids, gases, and plasma as longitudinal waves, also known as compression waves. It needs a medium to propagate so it can be propagated through solids as both longitudinal waves and transverse waves.
Longitudinal sound waves contain alternating pressure deviations causing compression and rarefaction, while transverse waves have waves of alternating shear stress perpendicular to the direction of propagation.
Waves can make matter move up and down or from side to side but do not carry along with them. Light waves are not considered true waves because they carry without the involvement of the motion of matter.
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A rock with a 8 kg mass is tied to a string and swung in a circular path. The 1.8 meter string is tied to a post, and during the motion, the string has a 35° angle with the post. The rock makes 100 rounds in 3 minute. The centripetal force on the ball is __ N.
The centripetal force of the rock tied to a string and swung in a circular path is determined as 1.65 N.
Angular speed of the rock
The angular speed of the rock is calculated as follows;
ω = 2π N
[tex]\omega = 35^0 \times \frac{2 \pi \ rad}{360^0} \times \frac{100}{3\min} \times \frac{1 \min}{60 \ s} \\\\\omega = 0.339 \ rad/s[/tex]
Centripetal force of the rockThe centripetal force of the rock is calculated from the product of mass and centripetal acceleration as shown below;
Fc = ma
Fc = m(ω²r)
Fc = mω²r
Fc = 8 x (0.339)² x 1.8
Fc = 1.65 N
Thus, the centripetal force of the rock tied to a string and swung in a circular path is determined as 1.65 N.
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A body of mass 5kg is ejected vertically from the ground when a force of 600N acts on it for 0.1s. Calculate the velocity with which the body leaves the ground.
Assuming g=10N
upward force=600N(applied force)
downward force=(W)=(5x10)=50N
net force=600-50
=550N
F=(delta)P/t
(delta)P=m (v-u)
u=0m/s
(delta)P=mv
550=(5)(v)/0.1
550x0.1
55=5v
v=11m/s
there was no mention of any gravity acting on the object only applied force ,infact we aren't even given the constant
so many assumptions have been made whyyyyyyy!!!
what's your take on it scientists
A 1.2-kg hot iron sphere with heat capacity
576 J °C-1 is cooled by immersing it in a tank of
water (Fig g). (See the photo that I uploaded)The mass of the water is 3 kg and
its initial temperature is 12 °C. After 5 minutes,
both the iron sphere and the water reach a final
temperature of 15 °C.
(a) Find the energy gained by the water.
(b) Find the average rate of energy transfer from
the iron sphere to the water.
(c) What is the initial temperature of the iron
sphere?
Given the data from the question, the heat gained by the water, the rate of energy transfer and the initial temperature of the iron are:
A. The energy gained by the water is 37656 J
B. The average rate of energy transfer from
the iron sphere to the water is 125.52 J/s (Watts)
C. The initial temperature of the iron
sphere is 65.4° C
A. How to determine the heat gained Mass of water (M) = 3 Kg = 3 × 1000 = 3000 gInitial temperature (T₁) = 12 °C Final temperature (T₂) = 15 °Change in temperature (ΔT) = 15 – 12 = 3 °C Specific heat capacity (C) = 4.184 J/gºC Heat (Q) =?Q = MCΔT
Q = 3000 × 4.184 × 3
Q = 37656 J
B. How to determine the rate of energy transfer Heat (Q) = 37656 JTime (t) = 5 min = 5 × 60 = 300 sPower (P) =?Power = energy / time
Power = 37656 / 300
Power = 125.52 J/s (Watts)
C. How to determine the initial temperature of the iron Mass of iron (M) = 1.2 Kg = 1.2 × 1000 = 1200 gHeat capacity (C) = 576 J/ºC Heat (Q) = 37656 JTemperature (T) =?Q = CT
37656 = 576 × T
Divide both side by 576
T = 37656 / 576
T = 65.4° C
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( Infer this information for both the lens and mirror based on the data collected. Report these ranges in terms of f and/or 2f. For example, “When do is less than 2f.” )
What range of do values will result in a real image?
What range of do values will result in a virtual image?
What range of do values will result in a smaller image?
This exercise is about Reflection and Mirrors. It explores the relationship between convex mirrors, virtual images, and complex images as well as to object distance d₀.
Any d₀ value greater than 10 for a convex lens will produce a true or real image, while any d₀ value greater than 15 for a complex mirror will produce a real image.
What range of d₀ values will result in a virtual image?Any d₀ number less than 10 for a convex lens will result in a virtual image. Also, any d₀ value less than 15 for a complex mirror will result in a virtual picture.
What range of do values will result in a smaller image?The range of d₀ values that would result in a reduced picture in both lenses and mirrors is:
d₀ > 2 f, where is the Focal length.
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Using the model above, which letter represents the position of the earth when the northern hemisphere is experiencing the shortest hours of daylight
A
B
C
D
Answer:
At position "B" the northern hemisphere is tilted the most from the earth-sun direction and will experience the shortest hours of daylight, (and also the most indirect sun rays).
Suppose that a simple pendulum consists of a small 60.0 g bob at the end of a cord of negligible mass. If the angle 0 between the cord and the vertical is given by g - (0.0800 rad) cos[(4.43 rad/s) t 0], what are (u) the pendulum's length and (b) its maximum kinetic energy
Based on the mass of the bob and the angle between the cord and the vertical, the pendulum length is 0.50m.
The maximum kinetic energy can be found to be 9.42 x 10⁻⁴J.
What is the pendulum length?This can be found as:
= g-force / w²
Solving gives:
= 9.8 / 4.43²
= 0.4998 m
= 0.50 m
What is the maximum kinetic energy?This can be found as:
= 0.5 × m × w² × A²
Maximum kinetic energy is:
= 0.5 × 60 × 10⁻³ × (4.43 × 0.4998 x 0.08 rad)²
= 9.42 x 10⁻⁴J
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write comparison between Electrical Circuit and Magnetic Circuit.
[tex] \\ \\ \\ \\ \\ \\ \\ [/tex]
Thanks¡!¡:)
Magnetic circuit, closed path to which a magnetic field, represented as lines of magnetic flux, is confined.
In contrast to an electric circuit through which electric charge flows, nothing actually flows in a magnetic circuit.
Explanation:
Hope it helps you (`▿▿▿▿´ƪ)
Which materials are good insulators? Select three options. Glass paper gold plastic silver.
Answer:
Plastic Glass and Paper
Explanation:
i just took the assignment
Glass, paper, and plastic are good insulators. The material that does not allow the flow of current through them is known as the insulators.
What are insulators?An electrical insulator is a substance that prevents electric current from flowing freely. The electrons in the insulator's atoms are closely bonded and cannot travel easily.
Other materials, such as semiconductors and conductors, carry electricity more easily. The characteristic that characterizes an insulator.
Gold and silver are good conductors of electricity. While glass, paper, and plastic are good insulators.
Hence glass, paper, and plastic are good insulators.
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A microwave has a period 0.000015 s has a wavelenth of ?
(Round your answer to the nearest hundreth. Add a zero to the begining of the number if necessary.)
Answer:
30 cm to 1 mm
Explanation:
30 cm to 1 mm
What is fission and how is it related to atomic energy
Answer:
Fission is the release of atomic energy related to the splitting of nuclei.
M = M1 + M2 + E where E = m c^2 energy from conversion of mass
if the daughter nuclei are less in total mass than the parent nucleus then the difference is released as atomic energy where E = m c^2 and m is the mass that has been lost in the conversion.
if i were to (HYPOTHETICALLY) punt a small child off of a building, (HYPOTHETICALLY) how long would it take for the (VERY HYPOTHETICAL) child to reach maximum velocity?
(HYPOTHETICALLY) the child would weigh 88 pounds, have blond hair and blue eyes, and (HYPOTHETICALLY) be named "Jacob."
THIS QUESTION IS HYPOTHETICAL AND I AM TOTALLY NOT PLANNING TO COMMIT AN ATROCITY!
Answer:
Around 190-ish miles per hour when it hit the ground maybe
Explanation:
Which is the surest test of charge on a body?
(a) Repulsion
(b) Lightning
(c) Combustion
(d) Insulation
Answer:
Repulsion
Explanation:
Unlike attraction of magnets opposite polls
Repulsion happens between same polesLike if you put north pole to north poll they get repulsed .Same with south polesAnswer:
Repulsion
Explanation:
Brainliest MisterBrainly
[tex]\red{ \rule{0pt}{900000pt}}[/tex]
How do scientists know that seafloor spreading occurs?Explain how this spreading causes the continents to seperate.
I have an answer but I'm not it sure about it. I just need someone to help confirm it. Thanks
Answer:
0.40s. He's dead, Jim.
Explanation:
The block accelerates at a rate of [tex]9.81 ms^-^2[/tex]. The moment it's 14 meters from the ground, it has traveled 39 meters, in about [tex]39=\frac12(9.81)t^2 \rightarrow 2.82 s[/tex].
For the man to dodge, the time left is the distance the block takes to go down to 2 meters from ground, or 51 meters from its starting point. Which translates in [tex]51=\frac12(9.81)t^2\rightarrow 3.22s[/tex]
He has thus less than half a second ([tex]0.40s[/tex] to be exact) to dodge.
Which statement correctly describes the relationship between frequency and wavelength?
A :As the frequency of a wave increases, the longer its wavelength is
B: As the frequency of a wave increases, the shorter its wavelength is.
C: As the frequency of a wave increases, its wavelength remains the same.
Answer:
Answer:
Option B
Explanation:
Option B talks about how the frequency of the wave increases the shorter it's wavelengths
Answer:
b
Explanation
B: As the frequency of a wave increases, the shorter its wavelength is.
What does a 'dead' battery mean chemically? a) q > 1 b) q < 1 c) q = 1 d) q = k e) q/k = 0
Answer:
d) q=k
Explanation:
When a battery is "dead" it means that the chemical components are at equilibrium. When that occurs,
Δ
G
= 0, and Q = K.
A 'dead' battery mean chemically Q=1. At this position, the battery is at equilibrium condition, and considered as dead.
What is dead battery?Dead battery is the battery in which no flow of electron take place as there is no potential difference.
Chemically, the battery is considered as dead battery, when there is no chemical process happens in battery.
Q is a reaction quotient of Nernst Equation for a battery.At the equilibrium condition, the value of Q is to become equal to 1. At this condition, the battery is considered as dead.Thus, a 'dead' battery mean chemically Q=1. At this position, the battery is at equilibrium condition, and considered as dead.
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The Kelvin scale is also know as the absolute zero
TRUE OR FALSE
The Kelvin scale is also called absolute zero scale
Explanation:
true
Why does the law of conversion of mass make sense?
Explanation:
If u mix 1g of salt with 100 ml of water, both dissolves but at the same time the mass of the solution increases.
According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants. The law of conservation of mass is useful for a number of calculations and can be used to solve for unknown masses, such the amount of gas consumed or produced during a reaction
Answer:
The law of conservation of mass was crucial to the progression of chemistry, as it helped scientists understand that substances did not disappear as result of a reaction as they may appear to do; rather, they transform into another substance of equal mass.
Explanation:
Which is NOT a part of transverse waves?
A. wavelength
B. trough
C. compression
D. crest
Answer:
C. Compression
Explanation:
✧✧✧EMOTIONAL DAMAGE✧✧✧
kleann
Which is NOT a characteristic of
the temperate region?
A. a lot of organic matter
B. moderate temperatures
C. moderate rainfall
D. under-developed soil horizons
Answer:
under developed soil horizons
A student wants to make a scientific explanation regarding the wave model of electromagnetic radiation. Which of the following would be part of the scientific explanation?(1 point)
claims
opinions
historical events
procedures
Answer:
Explanation:
I can say claims
Electromagnetic radiation are a group of waves which are are produced by the vibrations of electromagnetic fields.
What is electromagnetic waves?Electromagnetic radiation are a group of waves which are are produced by the vibrations of electromagnetic fields. Electromagnetic waves/radiation possess the ability to travel through vacuum (i.e. they do not require a material medium for their propagation) while also carrying radiant energy.
Electromagnetic fields which are the sources of electromagnetic radiation, exist as a result of the combination and interaction of travelling electric and magnetic field forces.
Electromagnetic radiations consists of the following waves: radio waves, infrared waves, visible light, ultraviolet rays, X-rays, and gamma rays.
These waves have differing and unique properties such as wavelength, frequencies, ionizing properties, penetrating ability, sources as well as well as uses. However, they have a common property of velocity- they travel with the speed of light, 3.0 * 10⁸ m/s.
In addition to having the same velocity, all electromagnetic radiation exhibit interference and diffraction.
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Help please. Will give brainliest
Answer:
Your answer would be:
B.) Both carry energy in the form of vibration
Explanation:
Have a great rest of your day
#TheWizzer
This fossil snake and this living rat both have a structure in their skull called the quadrate bone. What best explains why both species have a quadrate bone?
The snake and rat both share the same ancestor population that had a quadrate bone, which was inherited from an ancestor population.
What is a homo-logous structure?A homo-logous structure is a trait that may or not have the same function but has a common evolutionary origin.
A homo-logous structure can be used to trace the evolutionary relationships between species.
Conversely, an analogous structure has the same function but it does not reflect an evolutionary origin.
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Identify the solutions (homogeneous mixtures) in the list below. check all that apply. lead, an alloy of tin and lead ammonia, a pure compound of nitrogen and hydrogen window cleaner, a mixture of ammonia and coloring dissolved in water gasoline, a mixture of organic liquids with a fixed composition throughout distilled water, pure with no metals or particles
Answer:
Brainliest pls
Explanation:
lead solder, an alloy of tin and lead
window cleaner, a mixture of ammonia and coloring dissolved in water
gasoline, a mixture of organic liquids with a fixed composition throughout
The solutions and homogeneous mixtures in the given list are:
A. Lead solder, an alloy of tin and lead.
D. Window cleaner, a mixture of ammonia and coloring dissolved in water.
E. Gasoline, a mixture of organic liquids with a fixed composition throughout.
What is a solution?A solution can be defined as a special type of homogeneous mixture that comprises a solute and a solvent.
A homogeneous mixture can be defined as any solid, liquid, or gaseous mixture which has an identical (uniform) composition and properties throughout any given sample of the mixture.
In Science (Physics), all solutions are considered to be a homogeneous mixture because their constituents are uniformly (evenly) distributed.
In conclusion, the solutions and homogeneous mixtures in the given list are:
Lead solder, an alloy of tin and lead.Window cleaner, a mixture of ammonia and coloring dissolved in water.Gasoline, a mixture of organic liquids with a fixed composition throughout.To know more about solution follow
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PLEASE HELP ASAP
1) During a transformation, a positive radon nucleus repels a positive helium nucleus
(m = 6.64 × 10–27 kg), giving it an energy of 7.37 × 10–13 J. How fast is the helium
nucleus moving when it is far away from the radon nucleus? Draw an energy bar chart
to assist you.
2) A positive charge of +7.2 μC and a positive charge of +6.64 μC are 10 cm apart, at
rest. After t seconds, the particles are at a distance 15 meters apart with velocities
–8.7 m/s and 9.1 m/s, respectively. Draw an energy bar chart of the situation and
determine the direction of the forces and velocities of each charge.
best answer gets brainliest
Answer:
a because they are bigger and have more mass wich means that they will fall faster because there is more weight going downward...
Explanation:
Beluga
Answer:
Explanation:
It depends on whether this is a "trick" question.
The law of universal gravitation says that the attractive force between two objects depends directly on their masses and inversely to the square of distance in between them.
As the objects in A are bigger than B, they MAY have higher masses. So the force is larger in A.
But no information is given about object mass or density. The distance between objects in B is shorter. So if the objects in B have the same masses those in A, then the force is larger in B.
help me with this one aswell, too confused and tired for this
The car's motor transfers
-----------energy
into useful-----------
energy as the car moves,
Some energy is wasted -----------as
energy
Answer:
chemical potential
kinetic
thermal
the earth exerts a gravitational force of 850N on John. What is Johns mass in kg
Answer:
86.73 kg
Explanation:
Remember that F=mg
Let's plugin our numbers
850N=m9.8m/s^2
850N=9.8m/s^2m
86.73=m