they take a long time to heat up because stone has a high heat capacity, meaning it takes more heat to warm it up than other materials. so if you warm it up it will also take a long time to get cold because it is efficient at trapping and insulating heat.
Stone has a high specific heat capacity so it takes a lot of energy to get it to reach a good temperature.
Stones absorbs heat, holds it for a period of time, and then passes it on. However, if the walls are thick enough then it can act like insulation in that it takes quite awhile for the heat to penetrate.
What is specific heat capacity ?
The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C)
Stone has a high specific heat capacity so it takes a lot of energy to get it to reach a good temperature. One it has reached that temperature it has to lose a lot of energy for the temperature to go down
Stones absorbs heat, holds it for a period of time, and then passes it on. However, if the walls are thick enough then it can act like insulation in that it takes quite awhile for the heat to penetrate.
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A leaf floating down from a tree is an example of an object in free fall.
Answer:
Oi, mate its false
Explanation:
because if an leaf floats down from a tree it is not considered an object for a free-fall
Answer:
False
Explanation:
Which of the following type of personal debts is usually considered wise and justified? A. credit card purchases of luxuries that you want immediately B. a loan for the car you have always dreamed about C. money to pay off other debts and interest D. home mortgage
Answer:
C. Money to pay off other debts and interest
Money to pay off other debts and interest are usually considered wise and justified.
Answer:Option c
Explanation:
Personal loans give persons an access to funds that can be used as their wish and they are unsecured. This means that they do not need you to put down collateral for obtaining the loan.
A personal loan usually has higher rate of interests than that of secured loan. They offer lower rate of interest than credit cards. It is advisable to use personal loans to pay off debts form credit cards will support you in saving interests and help you to get out of the debt faster period of time.
A car travelling with 20 m/s , comes to halt after travelling 18 m .Find the time taken by the car to stop.
Answer:
The answer is 1.8 m/s.
Explanation:
Formula of speed is given below:
Speed, V = Distance / time
Given data:
Distance, d = 18 m
Initial veliocity = 20 m/s
Final velocity = 0 m/s
Time taken, t = ?
Find average speed:
Average speed =( initial velocity + final velocity)/2
= (20 + 0)/ 2
= 20/2 = 10 m/s
Average speed = distance / time
Time = distance / Average speed
Time, t = 18m / 10ms-1 = 1.8 m/s
The time taken by the car is 1.8 m/s
A wire carries a current of 10 amps in a direction of 90 degrees with respect to the direction of an external magnetic field of strength 0.3 tesla. What is the magnitude of the magnetic force on a 5m length of wire?
Answer:
15 N
Explanation:
The magnetic force on a piece of current-carrying wire is given by:
[tex]F=ILB sin \theta[/tex]
where
I is the current in the wire
L is the length of the piece of wire
B is the magnetic field strength
[tex]\theta[/tex] is the angle between the direction of B and I
In this problem:
I = 10 A
B = 0.3 T
L = 5 m
[tex]\theta=90^{\circ}[/tex]
Substituting into the equation, we find
[tex]F=(10 A)(0.3 T)(5 m) sin 90^{\circ}=15 N[/tex]
To calculate the magnetic force on a 5m wire carrying a 10 amps current in a 0.3 tesla magnetic field at a 90-degree angle, we use the formula F = IBL sin(θ). The result is a magnetic force of 15 Newtons.
The magnitude of the magnetic force on a 5m length of wire carrying a current of 10 amps and situated at a 90-degree angle with respect to the direction of an external magnetic field of 0.3 tesla.
To find the magnitude of the magnetic force, we use the formula F = IBL sin(θ), where F is the force, I is the current, B is the magnetic field strength, L is the length of the wire, and (θ) is the angle between the wire and the magnetic field.
Given that I = 10 A, B = 0.3 T, L = 5 m, and (θ) = 90 degrees (or \(\pi/2\) radians), the sine of 90 degrees is 1. Therefore, F = 10 A x 0.3 T x 5 m x 1 = 15 N.
The magnitude of the magnetic force on the wire is 15 Newtons.
suppose you increase your walking speed from 6 m/s to 13 m/s in a period of 3 s. what is your acceleration
Answer:
2⅓ m/s²
Explanation:
Average acceleration is the change in velocity over change in time.
a = Δv / Δt
a = (13 m/s - 6 m/s) / 3s
a = 2⅓ m/s²
a ≈ 2.33 m/s²
At which landing site would the lander have the greatest amount of gravitational potential energy? W X Y Z
Answer: the answer would be X
Explanation:
Answer:
X
Explanation:
The energy possessed by the position of the body is called gravitational energy. The formula for the gravitational potential energy is given by
U = m x g x h
Gravitational Potential energy of W:
m x g x h = m x 1.6 x 32 = 51.2 m
Gravitational Potential energy of X:
m x g x h = m x 3.7 x 16 = 59.2 m
Gravitational Potential energy of Y:
m x g x h = m x 1.6 x 35 = 56 m
Gravitational Potential energy of Z:
m x g x h = m x 3.7 x 12 = 44.4 m
The gravitational potential energy is maximum for X
Which objects has such a strong surface gravity that light cannot escape it?
Black holes.
Although black holes don't have surface they are the only known object that has gravity that not even light can escape it.
How does Electromagnetic Energy Travel?
Answer:
Perpendicular to the electric field and magnetic field
Explanation:
Electromagnetic waves are transverse waves composed by the perpendicular oscillating electric and magnetic fields.
EM waves have both Electrical and magnetic features.
they travel in the velocity of light (3*10⁸ ms⁻¹)
they does not require any media to travel. It has two perpendicular electric field and the magnetic field which are perpendicular to each other
They travel perpendicular to each of those electric and magnetic fields.
The more active a cell is, the more of these structures it has.
What are these structures?
a. ribosomes
b. chromosomes
c. mitochondria
d. vacuoles
Answer:pretty sure its mitochondria
Explanation:
What are the two main types of energy?
a. potential and electrical
b. radiant and kinetic
c. electrical and thermal
d. kinetic and potential
The two major types of energy is option d, kinetic and potential energy.
Answer:
the answe is d your welcome
Explanation:
The four best metallic conductors are: A. gold B. cadmium C. alloys D. copper E. silver F. sodium G. aluminum H. iron I have to pick 4
Answer:
Explanation:
I can give you four for certain.
Copper
Gold
Silver
Aluminum
an orifice tube is located
an orifice tube is located within the tube between the condenser & the front evaporator
Matter is made up of very small particles called
Answer:
atoms
Explanation:
Answer:
The answer is atoms
Explanation: A definition of "matter" more fine-scale than the atoms and molecules definition is: matter is made up of what atoms and molecules are made of, meaning anything made of positively charged protons, neutral neutrons, and negatively charged electrons.
Drop the ball on the floor and observe its motion. Identify all the energy forms associated with the ball at these times:
about to be dropped
falling down
hitting the floor
moving back up
Answer:
about to be dropped-------------gravitational potential energy
falling down.................................Kinetic energy
hitting the floor.............................potential energy
moving back up...........................Kinetic energy
Explanation:
When the ball is about to be dropped it possesses potential energy.This is the energy stored in an object.When the ball is released, the potential energy will be converted to kinetic energy.Kinetic energy is the energy an object has due to its motion.When the ball hits the floor, energy is lost in form of siund and heat.The kinetic energy when falling will be transformed to potential energy which is lesser than the initial one when the ball was about to be dropped.The ball bounces back after hitting the floor.The potential energy is converted back to kinetic energy .
Answer:
About to be dropped-Gravitational potential energy
Falling down-Kinetic energy
Hitting the floor-Potential energy
Explanation:
Plz help, its for my CFE in physical science honors.
Glen is explaining the relationship between the wavelength and frequency of electromagnetic radiation to his friend, Harold. Which of the following would be a correct explanation of this relationship?
A. All electromagnetic waves have the same frequency, but different wavelengths
B. If a wave has a long wavelength, it will have a low frequency.
C. If a wave has a low frequency, it will have an equally low wavelength.
D. The frequency of a wave is not related to its wavelength.
Answer: B
f=c/wavelength
So we see if the wavelength is larger then the frequency gets smaller and the smaller the wavelength the higher the frequency.
Any questions feel free to ask. Thanks
Final answer:
Glen's correct explanation is that if a wave has a long wavelength, it will have a low frequency, showing the inverse relationship between frequency and wavelength for electromagnetic waves.
Explanation:
Glen is explaining the relationship between the wavelength and frequency of electromagnetic radiation to his friend, Harold. The correct explanation of this relationship is embodied in option B: If a wave has a long wavelength, it will have a low frequency. This principle is underpinned by the universal speed of light (c), at which all electromagnetic waves travel. The relationship among these characteristics can be represented by the equation c = fλ, where c is the speed of light, f is the frequency, and λ is the wavelength. Thus, for all electromagnetic waves, a greater frequency implies a smaller wavelength and vice versa, demonstrating an inverse relationship between these two properties.
A new ride being built at an amusement park includes a vertical drop of 71.6 meters. Starting from rest, the ride vertically drops that distance before the track curves forward. If the velocity at the bottom of the drop is 10.0 m/s and the mass of the cart and passengers is 3.5 x 104 kg, how much potential energy was converted into thermal energy (heat)?
A. 2.3 x 10^7 J
B. 2.6 x 10^7 J
C. 4.3 x 10^7 J
D. 6.7 x 10^7 J
Answer:
The correct answer is A
Explanation:
I did the test twice and A) 2.3 x 10^7 J was correct.
Final answer:
The potential energy converted into thermal energy (heat) is 2.38 x 10^7 J.
Explanation:
The amount of potential energy converted into thermal energy (heat) can be calculated using the principle of conservation of energy. The initial potential energy of the ride is equal to the final kinetic energy at the bottom of the drop. The change in potential energy is given by the formula ΔPE = mgh, where m is the mass, g is the acceleration due to gravity, and h is the height. Substituting the given values, we have ΔPE = (3.5 x 10^4 kg)(9.8 m/s^2)(71.6 m) = 2.38 x 10^7 J.
How much heat is absorbed by a 70g iron skillet when its temperature rises from 13oC to 28oC?
The answer is:
The heat absorbed by the iron skillet is equal to 473 Joules.
Why?To solve the problem, we need to use the formula to calculate the quantity of heat absorbed, also, we need to remember that specific heat of the iron, which is equal to:
[tex]s=\frac{0.45J}{g*\°C }[/tex]
Where,
J, is the energy transferred.
g, is the mass of the object or substance.
°C, is the temperature measured in Celsius degrees.
We can calculate the heat absorbed using the following equation:
[tex]q=m*dT*s[/tex]
Where,
q, is the heat absorbed
m, is the mass of the object
dT, is the change in temperature
s, is the specific heat of the substance.
We are given the following information:
[tex]mass=70g\\dT=28\°C-13\°C=15\°C\\s=\frac{0.45J}{g*\°C }[/tex]
So, substituting and calculating, we have:
[tex]q=m*dT*s[/tex]
[tex]q=70g*15\°C*\frac{0.45J}{g*\°C }=472.5J=473J[/tex]
Hence, the heat absorbed is equal to 473 Joules.
Have a nice day!
All of the noble gases, Group 18, have eight valence electrons in its outer shell (excluding helium which only has two).
Which of these would represent the oxidation number of the noble gases such as xenon and argon?
A) -8
B) -2
C) 0
D) +8
C) 0 cause it’s a stable reaction
Answer:
C 0
Explanation:
Its an unstable reaction
Question is In Image Provided
Answer:
i would think the first two, but i cant be sure.
Explanation:
A box is pulled up a rough ramp that makes an angle of 22
degrees with the horizontal surface. The surface of the
ramp is the x-plane,
What is the magnitude of the force of tensionit te ne
force in the direction of 98 N2
57N
139 N
178N
183N
F = 650N
F = 700NFO
Answer:
139 N
Explanation:
Thats the answer on e2020
The significance of the force of hysteria force inside the path of 98 N2 is 139 N.
SOLUTION:
given force = 98 N
the angle of pulling = 22 °
force = 98 cos22°
= 139 N
What's the importance of the pressure?The importance of the pressure is the variety that represents the energy of the pressure. for instance: think the force is = 10 N closer to the east. 'towards east' shows the path at the same time as '10' is the importance of the pressure. So basically, magnitude is the 'value' or 'amount' of any bodily amount.
The bodily force exerted on an item. The force implemented is perpendicular to the surface of gadgets in line with unit area. The simple formula for stress is . Unit of stress is Pascals (Pa).
A simple instance of strain can be visible via preserving a knife to a bit of fruit. if you hold the flat part of the knife against the fruit, it won't cut the floor. The pressure is spread out of a huge place.
What is a pressure solution?The frenzy or pull on an item with mass that causes it to alternate its pace. Force is an outside agent able to change the state of relaxation or movement of a particular frame.
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Read each scenario and then answer the question scenario a 120 J of work is done in 6 seconds Scenario b 160 J of work is done in 8 seconds scenario c 200 J of work is done in 10 seconds which scenario uses the most power
Answer:
all scenarios are using the same power
Explanation:
we know that power is defined as P(Watts)=W(Joules)/t(seconds).
When applying this formula to each of the scenarios we find:
[tex]\frac{120J}{6s}=\frac{160J}{8s}=\frac{200J}{10s}= 20W[/tex]
Done
the words bin and bean. rot and rat are examples of (blank)
Answer:
the correct answer is homonyms
Explanation: Hope it helped
Answer:
MINIMAL PAIRS
Explanation:
got it correct on plato
How do the electrical patterns in electronics convey information?
With analog and electric signals
With analog and digital signals
With electric and thermal signals
With electric and digital signal
Answer:
Electronics convey information with electrical patterns called analog and digital signals.
Explanation:
A digital signal encodes information as a string of 1's and 0's. Pulsing a current on and off can produce a digital signal. When the current is off, it represents a 0.
A steel ball rolls with a constant velocity on a tabletop 0.950 m high it rolls off and hit the ground 0.352 m from the edge of the table. How fast was the ball rolling ?
Answer:
0.799 m/s if air resistance is negligible.
Explanation:
For how long is the ball in the air?
Acceleration is constant. The change in the ball's height [tex]\Delta h[/tex] depends on the square of the time:
[tex]\displaystyle \Delta h = \frac{1}{2} \;g\cdot t^{2} + v_0\cdot t[/tex],
where
[tex]\Delta h[/tex] is the change in the ball's height. [tex]g[/tex] is the acceleration due to gravity. [tex]t[/tex] is the time for which the ball is in the air.[tex]v_0[/tex] is the initial vertical velocity of the ball. The height of the ball decreases, so this value should be the opposite of the height of the table relative to the ground. [tex]\Delta h = -0.950\;\text{m}[/tex].Gravity pulls objects toward the earth, so [tex]g[/tex] is also negative. [tex]g \approx -9.81\;\text{m}\cdot\text{s}^{-2}[/tex] near the surface of the earth. Assume that the table is flat. The vertical velocity of the ball will be zero until it falls off the edge. As a result, [tex]v_0 = 0[/tex].Solve for [tex]t[/tex].
[tex]\displaystyle \Delta h = \frac{1}{2} \;g\cdot t^{2} + v_0\cdot t[/tex];
[tex]\displaystyle -0.950 = \frac{1}{2} \times (-9.81) \cdot t^{2}[/tex];
[tex]\displaystyle t^{2} =\frac{-0.950}{1/2 \times (-9.81)}[/tex];
[tex]t \approx 0.440315\;\text{s}[/tex].
What's the initial horizontal velocity of the ball?
Horizontal displacement of the ball: [tex]\Delta x = 0.352\;\text{m}[/tex]; Time taken: [tex]\Delta t = 0.440315\;\text{s}[/tex]Assume that air resistance is negligible. Only gravity is acting on the ball when it falls from the tabletop. The horizontal velocity of the ball will not change while the ball is in the air. In other words, the ball will move away from the table at the same speed at which it rolls towards the edge.
[tex]\begin{aligned}\text{Rolling Velocity}&=\text{Horizontal Velocity} \\&= \text{Average Horizontal Velocity}\\ &=\frac{\Delta x}{\Delta t}=\frac{0.352\;\text{m}}{0.440315\;\text{s}}=0.0799\;\text{m}\cdot\text{s}^{-1}\end{aligned}[/tex].
Both values from the question come with 3 significant figures. Keep more significant figures than that during the calculation and round the final result to the same number of significant figures.
The steel ball was rolling at approximately 0.8 m/s when it fell off the table. This was determined using the physics principles of projectile motion and the known values of acceleration due to gravity, vertical displacement, and horizontal displacement.
Explanation:This physics question involves the concept of projectile motion. Contrary to horizontal motion, the vertical motion is affected by gravity. Ignore air resistance for simplicity.
When the steel ball falls off the table, it freely falls under acceleration due to gravity which is approximately 9.8 m/s², being directed downward. From the time it leaves the edge of the table to the time it hits the ground, it experiences a vertical displacement of 0.950 m (the height of the table).
Let's use the equation: y = V0yt + 0.5gt². Here y is the displacement (0.950 m), g is acceleration due to gravity (9.8 m/s²), and V0y is the initial vertical velocity of the ball, which is zero since the ball is moving horizontally on the table. So, we can solve this equation for time (t).
Inserting known values: 0.950 m = 0.5*(9.8 m/s²)*t². We solve for t and get t = sqrt((2*0.950 m)/(9.8 m/s²)) ~= 0.44 s.
The speed of the ball right before it falls off the table is the horizontal component of velocity, which remains constant throughout the whole motion. The horizontal distance the ball travels is 0.352 m. We can use this along with the time it takes to travel this distance to solve for horizontal speed (Vx).
Since Vx = x/t, we have Vx = 0.352 m / 0.44 s, so Vx ~= 0.8 m/s.
So, the steel ball was rolling at approximately 0.8 m/s when it fell off the table.
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The emission spectrum of the element lithium is shown below.
What is the best estimate of the color that will be seen when a sample of lithium gas absorbs a lot of energy?
mix of blue and green
mix of red and orange
mix of yellow and green
pure yellow
Answer:
mix of red and orange
Explanation:
The lithium emission spectrum indicates high intensity at the wavelength of 600nm to 700nm
In the visible light spectrum, colors that are in this range are;
Red=700 - 630 nm
Orange= 630 to 590nm
A sample of lithium gas that has absorbed a lot of energy will show a mix of red and orange colors
Answer:mix of red and orange
Explanation:
How do simple machines make work easier? A. They decrease the power available. B. They maintain the distance of a force. C. They apply force quickly. D. They change the strength or direction of a force.
Answer:
C or D I would think
Explanation:
Answer:
the answer is d
Explanation:
solve 305809 square root by division method
A diode is a semiconductor that is used to --
allow current to flow only in one direction
turn the flow of electricity on and off
amplify electrical signals
create a magnetic field
Answer:
Allows current to flow in one direction.
Explanation:
Answer:Diodes can be used as rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators. The fundamental property of a diode is its tendency to conduct electric current in only one direction.
Explanation:
Which item is made from a synthetic material? A. cotton pants B. leather jacket C. tissue paper D. wicker basket
Answer:
is the letter A
Explanation:
Out of choices which is given above, Wicker basket is the only product which is made from a synthetic material.
Answer: Option D
Explanation:
Cotton is entirely different from synthetic fibers which is very soft fabric and absorbs heat ghastly compared to other materials. People living in area with mostly summer prefer cotton. Leathers are used in cold climatic regions which protects them from experiencing cold temperature. Tissue papers are made from paper pulp and so from the given options wicker basket is the only one made of synthetic material.
For a stationary observer, when the source of sound is moving, its pitch appears to change.
T.
or
F.
Answer:
I believe it is true.
Explanation:
Hope my answer has helped you!
Hello There!
This is "True"
For a stationary observer, when the source of sound is moving, its pitch appears to change.