While building a house, it's crucial to take energy transmission into account because homes lose a lot of thermal energy. Radiation, conduction, and convection are three ways they can lose energy.
Why is heat transmission critical in structures?Buildings must consider heat transfer while designing the fabric of the structure as well as the passive and active systems required to provide the desired thermal conditions with the least amount of resource use.
What alters the way heat moves through buildings?The three most crucial variables are temperature, moisture content, and density. Thickness, air velocity, pressing, and ageing time are further considerations. The correlation between the key variables and thermal conductivity is shown.
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Two charged spheres are sitting 1m apart. The left sphere has a charge of 2 C, the
right has a charge of -3C. What is the force between the spheres?
The force between the charged spheres is -5.4 x 10¹⁰ N.
option D.
What is the force between the two charges?The force between two charged spheres can be calculated using Coulomb's law, which states that the force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.
The formula for Coulomb's law is:
F = kq1q2/d^2
where;
F is the force between the charges, q1 and q2 are the charges of the two spheres, d is the distance between them, and k is the Coulomb constant.The value of the Coulomb constant is 8.98755 × 10^9 N·m^2/C^2.
Plugging in the values given in the problem, we get:
F = (8.98755 × 10^9) * (2 C) * (-3 C) / (1 m)^2
Simplifying this expression gives:
F ≈ -5.4 x 10¹⁰
Therefore, the force between the spheres is -5.4 x 10¹⁰ N, which means that the spheres are being pulled towards each other. The negative sign indicates that the force is attractive due to the opposite charges on the spheres.
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Dispersion of light by a prism is due to the change in ______
a) frequency of light
b) speed of light
c) scattering
d) none of these
Answer:
(b) the speed of light depends on the index of refraction of the medium thru which it is traveling - different colors have different indices of refraction and are refracted at different angles
PLEASE HELP ASAP PHYSICS
The speed of the wave is 4 m/s.
option A.
What is the speed of a wave?
The speed of a wave depends on the type of wave and the medium through which it is traveling. In general, the speed of a wave can be calculated by multiplying the wavelength of the wave by its frequency.
In a vacuum, electromagnetic waves (such as light) travel at a constant speed of approximately 299,792,458 meters per second, which is commonly referred to as the speed of light.
For this given question, if the wave oscillates 4 times per second, then the speed is 4 m/s.
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Two blocks move along a linear path on a nearly frictionless air track. One block, of mass 0.110 kg, initially moves to the right at a speed of 4.60 m/s, while the second block, of mass 0.220 kg, is initially to the left of the first block and moving to the right at 6.90 m/s. Find the final velocities of the blocks, assuming the collision is elastic.
Answer:
The final velocities of the blocks are 3.00 m/s and 8.50 m/s, respectively.
Block slides rightward on the floor toward an ideal spring attached to block , as shown. At time , block reaches the spring and starts compressing it as block also starts to slide to the right. At a later time, , block loses contact with the spring. Both blocks slide with negligible friction. Taking rightward as positive, which pair of graphs could represent the acceleration of block and the center-of-mass acceleration of the two-block system?
At this moment, the block will start to speed to the left as the spring starts to apply force on it.
What does the word "force" mean?The definition of force in physics is: The press or pull on a massed object changes its velocity. An agent with the ability to change a body's resting or active condition is known as an external force.
What in science is a force?The word "power" has a specific meaning in physics. Calling a force at this point a pressing or a pull is perfectly appropriate. A force does not "be in it" or "be contained by" an object. One thing experiences a force from another. Both biological things and inanimate objects can be considered forces.
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Which of the following accurately describes the energy stored on a parallel plate capacitor?A) The energy is inversely proportional to the charge stored on the capacitor.
B) The energy is directly proportional to the potential across the capacitor.
C) The energy is directly proportional to the capacitance of the capacitor.
F) The energy in proportional to the square the charge stored on the capacitor.
The energy is directly proportional to the capacitance of the capacitor, accurately describes the energy stored on a parallel plate capacitor.
What is capacitor?
A capacitor is an electronic component that stores electrical energy in an electric field. It consists of two conductive plates separated by an insulating material known as a dielectric. When a voltage is applied across the plates, it creates an electric field between them, which causes opposite charges to accumulate on the plates. The amount of charge that a capacitor can store is determined by its capacitance, which is a measure of the capacitor's ability to store charge for a given voltage. Capacitors are used in a variety of electronic circuits to filter out unwanted frequencies, smooth out power supplies, and store electrical energy for later use. They come in many different sizes and shapes, including ceramic, electrolytic, and tantalum capacitors.C) The energy is directly proportional to the capacitance of the capacitor.
The energy stored on a parallel plate capacitor is given by the formula:
E = 1/2 * C * V^2
where E is the energy stored, C is the capacitance of the capacitor, and V is the potential difference across the capacitor.
This formula shows that the energy stored on a parallel plate capacitor is directly proportional to the capacitance of the capacitor. Therefore, option C accurately describes the energy stored on a parallel plate capacitor.
Option A is incorrect because the energy stored is directly proportional to the potential difference across the capacitor, not inversely proportional to the charge stored.
Option B is incorrect because although the energy stored is related to the potential difference across the capacitor, it is not directly proportional to it.
Option F is also incorrect because the energy stored is proportional to the square of the potential difference across the capacitor, not the square of the charge stored.
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You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 1. 70×107 m and its rotation period to be 22. 3 hours. You have previously determined that the planet orbits 2. 70×1011 m from its star with a period of 402 earth days. Once on the surface you find that the free-fall acceleration is 12. 5 m/s2.
A) What is the mass of the planet?
B) What is the mass of the star?
The mass of the planet is 3.40 x 10^24 kg. and the mass of the star is 6.50 x 10^30 kg.
A). g = GM/r^2
We can rearrange this equation to solve for the mass of the planet:
M = gr^2/G
Plugging in the given values, we get:
M = (12.5 m/s^2) x (1.70 x 10^7 m)^2 / 6.67 x 10^-11 Nm^2/kg^2
M = 3.40 x 10^24 kg
B). T^2 = (4π^2/G(M+m)) x a^3
M = (4π^2/G) x a^3 / T^2 - m
Plugging in the given values, we get:
M = (4π^2/6.67 x 10^-11 Nm^2/kg^2) x (2.70 x 10^11 m)^3 / (402 earth days)^2 - 3.40 x 10^24 kg
M = 6.50 x 10^30 kg
The solar system is a system consisting of the Sun, eight planets, dwarf planets, moons, asteroids, comets, and other celestial bodies that are bound together by gravity. The system is located in the Milky Way galaxy, about 25,000 light-years away from the galactic center. The Sun is at the center of the solar system, and the planets orbit around it in elliptical paths.
The eight planets are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. The dwarf planets include Pluto, Ceres, Haumea, Makemake, and Eris. Moons orbit around the planets and asteroids and comets travel in their own paths throughout the solar system. The study of the solar system involves understanding the physical and chemical processes that occur on and within these celestial bodies, as well as their formation and evolution over time.
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in a house 6 bulbs each of 100 watt runs for 8 hours daily and 3 heaters of 1500 watt runs 5 hours daily, how much unit of electricity is consumed in 30 days
Answer:
Explanation:
all bulbs = 100*6=600 for 8 hrs
heaters= 1500*3=4500 for 5 hrs
so 600+4500=5100watts
Solution is in the attachment!! :)
How much gravitational force exists between a 75.0 kg person and a 90.0 kg person who are standing 5.0 meters apart from one another?
A. 270N
B. 9.0 x 10 N
C. 1.8 × 10-N
The magnitude of the gravitational force that exists between the two persons would be 2.01 × 10^-7 N.
Gravitational forcesThe gravitational force between two objects can be calculated using the formula:
F = G(m1m2)/r^2
where F is the gravitational force, G is the gravitational constant (6.67 × 10^-11 Nm^2/kg^2), m1 and m2 are the masses of the two objects, and r is the distance between their centers of mass.
Plugging in the values given, we get:
F = (6.67 × 10^-11 Nm^2/kg^2)(75.0 kg)(90.0 kg)/(5.0 m)^2
F = 2.01 × 10^-7 N
Therefore, the gravitational force between the two people is approximately 2.01 × 10^-7 N.
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A 10 kg block that is attached to a 5 kg block by a light inextensible string of negligible mass is pulled with a force of 50N at an angle of 30 degrees along with the horizontal. The 10 kg block experiences a kinetic frictional force of 20N. The coefficient of kinetic friction between the surface and the 5kg block is 0.2
The two blocks have an acceleration of 4.12 m/s^2.
String calculationsTo solve this problem, we need to draw a free-body diagram of both blocks and apply the laws of motion.
Let's assume that the positive x-direction is to the right, and the positive y-direction is upwards.
For the 10 kg block:
The weight force (W) acts downwards and has a magnitude of 10 x 9.8 = 98 N
The force of tension (T) acts upwards and is transmitted through the string from the 5 kg block
The frictional force (f) acts in the opposite direction to the motion and has a magnitude of 20 N
The force applied (F) acts at an angle of 30 degrees with the horizontal
We can resolve the applied force into its x- and y-components:
The x-component of the force (F cos 30) opposes the frictional force
The y-component of the force (F sin 30) opposes the weight force and is balanced by the tension force
Therefore, we can write the following equations of motion for the 10 kg block:
ΣFx = [tex]\sqrt{x}[/tex]T - F cos 30 - f = ma
ΣFy = T - W - F sin 30 = 0
For the 5 kg block:
The weight force (W) acts downwards and has a magnitude of 5 x 9.8 = 49 N
The force of tension (T) acts upwards and is transmitted through the string to the 10 kg block
The frictional force (f) acts in the opposite direction to the motion and has a magnitude of μkN, where μk is the coefficient of kinetic friction and N is the normal force
We can write the following equation of motion for the 5 kg block:
ΣFx =Δ f - T = ma
Now, we can solve for the unknowns.
From the equation ΣFy = T - W - F sin 30 = 0, we get:
T = W + F sin 30
T = 10 x 9.8 + 50 sin 30
T = 109.8 N
From the equation ΣFx = T - F cos 30 - f = ma, we get:
a = (T - F cos 30 - f) / m
a = (109.8 - 50 cos 30 - 20) / 10
a = 2.33 m/s^2
From the equation ΣFx = f - T = ma, we get:
a = √(f - T) / m
a = (0.2 x N - 109.8) / 5
a = -4.96 m/s^2
Since the acceleration of the two blocks is the same (due to the inextensible string), we can equate the two values of acceleration and solve for N:
2.33 = -4.96
N = 73.8 N
Now we can calculate the frictional force on the 5 kg block:
f = √μkN
f = 0.2 x 73.8
f = 14.76 N
Finally, we can use the equation ΣFx = T - F cos 30 - f = ma to find the acceleration:
a = (T - F cos 30 - f) / m
a = (109.8 - 50 cos 30 - 14.76) / 10
a = 4.12 m/s^2
Therefore, the two blocks accelerate to the right with an acceleration of 4.12 m/s^2.
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A wire whose resistance is R is stretched so that its length is tripled while its volume remains unchanged.
Determine the resistance of the stretched wire.
Express your answer in terms of R and appropriate constant
When a wire is stretched so that its length is tripled, its cross-sectional area decreases by a factor of 3, since the volume of the wire remains the same.
The resistance of a wire is given by the equation:
R = ρ L / A
where R is the resistance, ρ is the resistivity of the wire (a constant that depends on the material), L is the length of the wire, and A is the cross-sectional area of the wire.
If the length of the wire is tripled while its volume remains constant, the cross-sectional area of the wire must decrease by a factor of 3. Therefore, the new cross-sectional area of the wire is 1/3 of its original value.
Let A' be the new cross-sectional area of the wire. Then :--
A' = A / 3
Substituting this expression for A' into the equation for resistance gives:--
R' = ρ (3L) / (A/3) = 9ρL / A
Therefore, the resistance of the stretched wire is 9 times the resistance of the original wire. In terms of the original resistance R, we have:--
R' = 9R
So the resistance of the stretched wire is 9 times the resistance of the original wire.
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!!!ANSWERS ASAP!!!
1: What is the transfer of energy that occurs when a plant makes food through the process of photosynthesis.
A: light to chemical
B: chemical to light
C: light to thermal
D: thermal to nuclear
2: What is the transfer of energy that occurs when you use your ipod to listen to music?
E: sound to electric
F: mechanical to sound
G: thermal to sound
H: chemical to sound
3: What is the transfer of energy that occurs when a boy eats an ice cream?
J: chemical to mechanical
K: chemical to light
L: thermal to chemical
M: thermal to mechanical
4: What is the transfer of energy that occurs with a wind turbine?
R: light to mechanical
S: mechanical to thermal
T: mechanical to nuclear
V: thermal to mechanical
Think of it as abcd, once a is taken, a cant be used again. one is a, one is b, one is c, and one is d. !PLEASE ANSWER FAST!
Answer:
summary the passage you just read be sure to
Answer:
1 - A
2 - F
3 - L
4 - V
Explanation:
Might be a little hard to believe, but the order of the answers are A, B, C, and D, hehe.
The momentum of a car traveling in a straight line at 20 m/sec is 24,500 kg times m/sec. What is the cars mass?
To solve for the mass, use and derive the following formula for the momentum problem:
p = mv
m = p / v
where:
m is the mass if the object
p is the momentum (24,500 kg•m/s.)
v is the velocity of the object (20 m/s.)
Solution:m = p / v
m = 24, 500 kg•m/s ÷ 20 m/s
m = 1225 kg.
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a skateboarder who weighs 68kg is going down a ramp at the very bottom of the ramp they have 2400 J of kinetic energy calculate the speed in m/s to one decimal place
Answer:
The skateboarder has 2400 J of kinetic energy. We can use the formula for kinetic energy to find the speed:
KE = 1/2 mv^2
KE = 1/2 (68 kg) (v^2)
2400 J = 1/2 (68 kg) (v^2)
2400 J = 34 kg v^2
2400 J / 34 kg = v^2
70.59 m/s = v^2
The volume of a given mass of gas is 273cm²³ at 0 degree Celsius what is the volume at 237°c if its Pressure remains Constant
1. How does collecting natural gas affect the environment?
2. How does collecting hydropower affect the environment?
Answer:
1.Collecting natural gas can have negative impacts on the environment in various ways. One of the major concerns is the process of hydraulic fracturing or fracking, which can contaminate groundwater and soil with chemicals and heavy metals used in the process. Methane emissions from natural gas operations can contribute to air pollution and climate change. Additionally, the construction and operation of infrastructure such as pipelines and wells can disrupt ecosystems, fragment habitats, and harm wildlife.
2.Collecting hydropower can also have both positive and negative impacts on the environment. On the positive side, hydropower generation does not emit greenhouse gases and can help reduce the use of fossil fuels. However, the construction of dams can significantly alter natural waterways, disrupt river ecosystems, and cause the displacement of people and wildlife. Dams can also interfere with fish migration patterns and reduce the availability of freshwater downstream, affecting agriculture and drinking water supplies. Additionally, the management of water levels and flows can lead to changes in water temperature, dissolved oxygen levels, and sediment transport, which can further impact aquatic habitats and species.
Explanation:
hope it help pa brainliest
name five example of derived qualities
Answer:
velocity, power, energy, force and density
Explanation:
what happened to the arctic ocean during the past 40 years
Answer: about half of the sea ice area in the Arctic has been lost.
Explanation: The shrinking summer sea ice cover is a visible manifestation of global warming, and affects marine ecosystems, ocean circulation, and potentially weather events further south of the Arctic.
Explain the risk-reduction concept of compromising among multiple risks
and give an example of its successful use.
Answer:
Risk reduction deals with mitigating potential losses by reducing the likelihood and severity of a possible loss. For example, a risk-avoidant investor who is considering investing in oil stocks may decide to avoid taking a stake in the company because of oil's political and credit risk.
Explanation:
A cannon ball is fired horizontally with a velocity of 50m/s from the top of a cliff 90m high. After how many seconds will it strike the plain at the foot of the cliff? At what distance from the foot of the cliff will it strike? With what velocity will it strike the ground?
Answer: The cannon ball will hit the floor after 4.24 seconds. It will strike at a distance of 212m from the foot of cliff. As the object is travelling with the zero acceleration due to horizontal movement its final velocity will be 50m/s.
How can a hockey puck explain the transfer of kinetic energy? **Select all that apply.**
A. Kinetic energy can move from one item to another.
B. Kinetic energy transfers through air when materials are close.
C.Kinetic energy is lost when it transfers between materials.
D. Energy transfers from materials through touch.
A hockey puck can transfer kinetic energy by
A. Kinetic energy can move from one item to another.D. Energy transfers from materials through touch.How a hockey puck can transfer kinetic energyWhen a hockey player hits the puck with their stick, they transfer kinetic energy to the puck.
The puck then moves across the ice, and if it collides with another object (such as the boards or another player's stick), some of the kinetic energy from the puck is transferred to that object through touch.
This demonstrates that kinetic energy can move from one item to another and that energy transfers from materials through touch.
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two people are being pulled up out of the water by a helicopter the helicopter pulls the two people upwards who weigh a combined 150 kg and lifts them 20 meters. determine the work done by the helicopter is this work turned into kinetic or potential energy
Answer:
The work done by the helicopter is equal to the force applied multiplied by the distance moved in the direction of the force. In this case, the force is equal to the weight of the two people, which is given as 150 kg, and the distance moved in the direction of the force is 20 meters.
Therefore, the work done by the helicopter is:
Work = Force x Distance = 150 kg x 9.8 m/s^2 x 20 m = 29,400 J
This work is turned into potential energy, which is stored in the two people lifted by the helicopter. As the helicopter pulls the people upward, their potential energy increases due to their increased height above the ground. If the helicopter were to release the people, their potential energy would be converted into kinetic energy as they fell back down to the ground.
Explanation:
An electron moves in a circular path with a radius of 0.20 m at a constant speed of 1.5 X 105 m/s. What is the period of its motion?
Answer:
V = 2 π R / T speed V where T is period
T = 2 π R / V = 2 π * .2 m / 1.5E5 m/s = 8.38E-6 sec
Period = 8.36 * 10-6 sec
6. Applying Concepts The area of an output
piston is 25 times greater than the area of the
input piston. If the input force is 40 newtons,
what is the output force?
helppp please
Answer:
[tex]1000\; {\rm N}[/tex].
Explanation:
By Pascal's Law, the pressure on the two pistons should be the same.
Let [tex]F_{\text{in}}[/tex] and [tex]F_{\text{out}}[/tex] denote the forces on the two pistons. Let [tex]A_{\text{in}}[/tex] and [tex]A_{\text{out}}[/tex] denote the area of the two pistons.
Divide force by area to find the pressure.
Pressure on the input piston: [tex]\displaystyle P_{\text{in}} = (F_{\text{in}}/A_{\text{in}})[/tex].Pressure on the output piston: [tex]\displaystyle P_{\text{out}} = (F_{\text{out}} / A_{\text{out}})[/tex].By Pascal's Law, [tex]P_{\text{in}} = P_{\text{out}}[/tex]. Therefore:
[tex]\displaystyle \frac{F_{\text{in}}}{A_{\text{in}}} = \frac{F_{\text{out}}}{A_{\text{out}}}[/tex].
It is given that [tex]F_{\text{in}} = 40\; {\rm N}[/tex] and that [tex]A_{\text{out}} = 25\, A_{\text{in}}[/tex]. Therefore, the equation becomes:
[tex]\displaystyle \frac{40\; {\rm N}}{A_{\text{in}}} = \frac{F_{\text{out}}}{25\, A_{\text{in}}}[/tex].
Rearrange to find [tex]F_{\text{out}}[/tex]:
[tex]\begin{aligned}F_{\text{out}} &= \frac{(40\; {\rm N})\, (25\, A_{\text{in}})}{A_{\text{in}}} = 1000\; {\rm N}\end{aligned}[/tex].
The center grinds up plastic for recycling, but the workers forgot to label the type of plastic. The workers found that the plastic has a mass of 2.25 g and a volume of 2.5 cm. What is the density of the plastic? What type of plastic was it? JUSTIFY your answer.
Density of the plastic is 0.9 g/cm³.
The type of plastic collected are yogurt cups and plasticwares.
What is density of a substance?Density of a substance is defined as the mass per unit volume of the substance.
Here,
Mass of the plastic, m = 2.2 g
Volume of the plastic, V = 2.5 cm³
So, density, ρ = m/V
ρ = 2.25/2.5
ρ = 0.9 g/cm³
Recyclable plastics are sorted on the basis of their densities. Here, the density of the collected plastic is 0.9 g/cm³. So, the plastic material must be yogurt cups and plasticwares.
Hence,
Density of the plastic is 0.9 g/cm³.
The type of plastic collected are yogurt cups and plasticwares.
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how much does a change in mass affect the kinetic energy of two balls of comparable diameter?
Answer:
Mass and kinetic energy have a positive relationship, which means that as mass increases, kinetic energy increases, if all other factors are held constant.
In this state, Kinetic energy is equal to half of the product mass and velocity. SI unit is joules. So it's if the mass is doubled then the kinetic energy also gets doubled.
A crane must exert a force of 25000 N to lift a whale shark, the largest fish in the world, into a tank. If the shark’s acceleration equals 1.25 m/s2, what is the shark’s mass?
The force required to lift the whale shark is given as 25000 N, and its acceleration is 1.25 m/s^2. We can use Newton's second law of motion, which states that the force (F) applied on an object is equal to the product of its mass (m) and acceleration (a), i.e. F = ma.
Rearranging the equation to solve for the mass, we get:
m = F/a
Substituting the given values, we get:
m = 25000 N / 1.25 m/s^2
m = 20000 kg
Therefore, the mass of the whale shark is approximately 20,000 kg.
Earthquake activity in california is primarily caused by
Answer:
Movements of the tectonic plates
Explanation:
Earthquake activity in California is primarily caused by the movement of the tectonic plates that make up the Earth's crust. California lies along the boundary where the Pacific Plate and the North American Plate meet, which is known as the San Andreas Fault. The movement of these plates causes stress to build up in the Earth's crust, which can lead to earthquakes. Additionally, there are many other faults in California, both large and small, that contribute to earthquake activity in the state.
