The additional energy density required to get the water's temperature up to 55 degrees is 4,500 cal.
How much energy is required to heat 1 gramme of water by 100 degrees Celsius?1 g of water requires 100 calories to heat from its freezing point of 0 C to its boiling temperature of 100 C. However, in order to turn 1 g of water at 100 °C into 1 g of water vapour at 100 °C, 540 calories of energy are needed. The latent heat of vaporisation is what is causing this.
Water has an energy density of 1 calorie/gram/°C. As a result, the amount of energy needed to raise 150 grammes of water's temperature by 30 degrees Celsius (from 25 to 55 degrees Celsius) can be estimated as follows:
Energy = (mass of water) x (change in temperature) x (specific heat capacity of water)
Energy = 150 g x 30°C x 1 cal/g/°C
Energy = 4,500 calories
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công thức tính định luật ôm
Answer:
I=U/R
Explanation:
Metals allow electrons to flow through and complete the circuit. Therefore they are called?
Answer:
the answer would be conductors
a typical shooting star in a meteor shower is caused by a ________ entering earth's atmosphere.
A typical shooting star in a meteor shower is caused by a meteor entering Earth's atmosphere.
A shooting star, also known as a meteor, is caused by a small piece of interplanetary debris, called a meteoroid, entering the Earth's atmosphere at high speed. As the meteoroid enters the atmosphere, it rapidly compresses the air in front of it, creating a shock wave that heats up the meteoroid and the surrounding air.
This produces a bright, glowing trail of ionized gas, which we see as a shooting star. Most meteoroids burn up completely in the atmosphere due to the extreme heat generated by friction with the air molecules. However, if a large enough meteoroid survives atmospheric entry and reaches the ground, it is then called a meteorite. Meteor showers occur when the Earth passes through the debris trail left by a comet or asteroid.
Thus, a typical shooting star in a meteor shower is caused by a meteor entering Earth's atmosphere.
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The density of water is 1g/cm³ . If an object with a mass of 100g has a weight of 1 N on Earth, calculate the volume of water displaced by the object
If an object with a mass of 100g has a weight of 1 N on Earth, the volume of water displaced by the object is 100 cm³.
To find the volume of water displaced by the object, take the formula:
Volume = Mass ÷ Density
According to question:
Mass of the object = 100g
Density of water = 1g/cm³
Change the mass to kilograms:
Mass = 100g ÷ 1000 = 0.1kg
By using the formula, it is possible to find the volume of water displaced:
Volume = 0.1kg / 1g/cm³
= 0.1kg / 1g/cm³ × 1000g/1kg × 1cm³/1g
= 0.1 × 1000 cm³
= 100 cm³
Thus, the volume of water displaced by the object is 100 cm³.
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A 2. 0 kg particle moves along an x axis, being propelled by a variable force directed along that axis. Its position is given by x " 3. 0 m # (4. 0 m/s)t # ct2 $ (2. 0 m/s3 )t 3 , with x in meters and t in seconds. The factor c is a constant. At t " 3. 0 s, the force on the particle has a magnitude of 36 n and is in the negative direction of the axis. What is c
The value of constant c is, c = 9 N/s^2
The force on the particle is, F(x,t) = m(d^2x/dt^2), where m is the mass, and dx/dt and d^2x/dt^2 are the velocity and acceleration of the particle, respectively.
The velocity of the particle is,
v(t) = d/dt (3.0 m + (4.0 m/s)t - ct^2 + (2.0 m/s^3)t^3)
v(t) = 4.0 m/s - 2ct + 6.0t^2
The acceleration of the particle is,
a(t) = d^2/dt^2 (3.0 m + (4.0 m/s)t - ct^2 + (2.0 m/s^3)t^3)
a(t) = -2c + 12.0t
Substituting these expressions for velocity and acceleration into the formula for force,
F(x,t) = m(d^2x/dt^2) = 2.0 kg * (-2c + 12.0t)
At t = 3.0 s, the force on the particle has a magnitude of 36 N and is in the negative direction of the x-axis.
F(x,t) = -36 N
Substituting t = 3.0 s and F(x,t) = -36 N into the equation for force,
-36 N = 2.0 kg * (-2c + 12.0t)
-36 N = -4c + 72 N
36 N = 4c
Therefore, the value of c is,
c = 36 N / 4 = 9 N/s^2
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HELP
Match the term and the definition
Lesson 1.09
Question 5 options:
Cold Front
Stationary Front
Warm Front
Occluded Front
1.
When a cold air mass and a warm air mass meet but are at a standstill, the boundary is called
2.
If warm or more humid air presses forward and colder or drier air draws back, the boundary is called
3.
If colder or drier air presses forward and warmer or more humid air draws back, the boundary is called
4.
Sometimes a warm air mass can get caught between two cold fronts, which can force the warm air up into a wedge shape.
Answer:
Cold Front 3 // Stationary Front 1 // Warm Front 2 // Occluded Front 4
Explanation:
It's simple. Warm front means the warm air is pressing forward, which is why it's a warm front. Stationary Front, meaning they're at a standstill, also makes sense because stationary means not moving. Then since your last option is Occluded Front, since the others already have an answer, you have no choice but to match 4 with it. I took the quiz and got the answer right. :D
A ball is attached to the end of a string it swung at a vertical circle of three of 0.33M what is the minimum velocity that the ball must have to make it around the circle
Answer:
To make it around the circle, the tension in the string must provide the necessary centripetal force to keep the ball moving in a circle. At the top of the circle, the tension in the string must provide all the force to keep the ball moving in a circle. At the bottom of the circle, the tension in the string must provide the centripetal force in addition to the force of gravity.
We can use the centripetal force formula to solve for the minimum velocity: F_c = m * a_c
where F_c is the centripetal force, m is the mass of the ball, and a_c is the centripetal acceleration.
At the top of the circle, the centripetal force is equal to the tension in the string: F_c = T
where T is the tension in the string.
At the bottom of the circle, the centripetal force is equal to the sum of the tension in the string and the force of gravity:
F_c = T + mg
where m is the mass of the ball, g is the acceleration due to gravity (9.8 m/s^2), and T is the tension in the string.
The centripetal acceleration is given by: a_c = v^2 / r
where v is the velocity of the ball and r is the radius of the circle.
Since the circle has a radius of 0.33 m, we can substitute this into the equation for a_c: a_c = v^2 / 0.33
Combining these equations, we get:
At the top of the circle: T = m * v^2 / 0.33
At the bottom of the circle: T + mg = m * v^2 / 0.33
We can solve for the minimum velocity by using these two equations to eliminate the tension in the string: m * v^2 / 0.33 + mg = m * v^2 / 0.33
Simplifying this equation, we get: v = sqrt(0.33 * g)
Plugging in the values, we get: v = sqrt(0.33 * 9.8) = 1.81 m/s
Therefore, the minimum velocity that the ball must have to make it around the circle is 1.81 m/s
A force of 32N is applied to object of mass MKY which is at rest on a smooth horizontal surface if the product if 8M/S^2. find the value of M
Answer:
m=4kg
Explanation:
F=32, m=?, a=8ms^-2
F=ma
32=8m
32/8=m
m=4kg
A battery-powered lawn mower has a mass of 52.0 kg. If the net external force on the lawn
mower, including both your push and any resistance, is 44.5 N (about 10 pounds), then what
will be the magnitude of the mower's acceleration?
Hi there!
We can use the equation:
∑F = ma, where:
∑F = net force (N)
m = mass (kg)
a = acceleration (m/s²)
Rearrange in terms of acceleration:
∑F/m = a
Plug in the given values:
44.5/52 = 0.856 m/s²
A standard sheet of printer paper measures 8.5 inches and 11 inches long. calculate the length of one sheet in cm.
The length of one sheet of the standard sheet of printer paper in terms of centimeters is 27.94
As we are given that, the standard sheet of printer paper is 8.5 inches wide and 11 inches long,The calculation for this problem is just two-step,
So, we know that 1 inch is equal to 2.54 centimeters.
So, the width of the paper in terms of centimeters will be 8.5 X 2.54 =21.54 cm and the length of the paper in terms of centimeters will be 11 x 2.54 = 27.94 cm
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a pencil partially submerged in a glass of water appears broken or offset because of
When a pencil is partially submerged in a glass of water, it appears broken or offset due to the refraction of light. Refraction occurs when light passes through a medium with a different density than the one it was previously in, such as air and water. This causes the light to bend and change direction, resulting in the pencil appearing differently than it actually is.
The light that enters the water from the submerged portion of the pencil is refracted towards the normal (the imaginary line perpendicular to the surface of the water), while the light that enters the air from the exposed portion of the pencil is refracted away from the normal. This causes the image of the pencil to appear broken or offset at the water-air interface.
The degree of the bend depends on the angle of incidence and the refractive index of the medium. Hence, the amount of refraction varies with the thickness of the water column, making the pencil look even more broken or offset when viewed from different angles.
In conclusion, the illusion of a broken or offset pencil in water is caused by the refraction of light at the interface between water and air.
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if I walk forward 20km and back ward 20km my distance would be ____yard but my displacement would be_____
Answer:
distance = 40 km = 43744.5 yard
displacement = 0 km
Explanation:
Distance is how far you have walk (total length).
Displacement is the change of position.
If you walk and come back at the same exact place, there will be NO displacement, meaning there is NO CHAN GE in between the first and final position.
How does ATP affect your body during exercise
Answer:
The source of energy that is used to power the movement of contraction in working muscles is adenosine triphosphate (ATP) – the body's biochemical way to store and transport energy. However, ATP is not stored to a great extent in cells. So once muscle contraction starts, the making of more ATP must start quickly.
Explanation: Brainliest?
A ray of light in air strikes the surface of a liquid at an angle of 65 degrees with the normal. The refracted ray is at an angle of 42 degrees with the normal. What is the index of refraction of this liquid?
The index of refraction of this liquid will be 1.28. It is found as the ratio of the sin of the angle of incidence and the angle of reflection.
What is an index of refraction?The refractive index of a substance is a dimensionless quantity that specifies how quickly light passes through it in optics.
The given data in the problem is;
Angle of incidence (i)= 65°
Angle of refraction(r) = 42°
The formula for the index of refraction is;
\(\rm n = \frac{sin \ i }{sin \ r} \\\\ \rm n = \frac{sin 65 ^0}{sin 42^0} \\\\ n=1.28\)
Hence, the index of refraction of this liquid will be 1.28.
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An astronaut is on a spacewalk to make repairs to the solar panel array on the international space station. The astronaut somehow accidentally bumps into the soyuz space( the one the crew rode up to the iss) and the capsule breaks free of its dock. Which statement describes the motion of the capsules after it breaks free of the iss but before the panicked astronaut are able to retrieve it?
The motion of the Soyuz capsule after it breaks free of the ISS but before the panicked astronaut retrieves it can be described as an initial state of zero velocity and a free-fall motion caused by gravity.
When the Soyuz capsule breaks free of the ISS, it has an initial velocity of zero relative to the ISS. Since there is no air resistance in space, the only force acting on the capsule is gravity, which causes it to fall towards the Earth. The motion of the capsule can be described as a free-fall motion until some other force, such as atmospheric drag, slows it down or stops it.
Definition of Reverse bump
Answer:As the name implies, the Bump and Run Reversal (BARR) is a reversal pattern that forms after excessive speculation drives prices up too far, too fast. Developed by Thomas Bulkowski, the pattern was introduced in the June-97 issue of Technical Analysis of Stocks and Commodities and also included in his book, the Encyclopedia of Chart Patterns.
THIS AIN'T MINE
Answer:
to collide with (something) with a moderately forceful impact; thump.
Explanation:
An engine does 18 500 J of work and rejects 6550 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir?
The temperature of hot reservoir is 74.607 K.
Given- Engine does W=18500 J
Heat =6550 J
Temperature T2 = 285K
This is sink temperature.
To find the temperature of hot reservoir we need to employ the following points -
Capability of using the heat energy and converting it into useful work and rejecting some heat as garbage. Its as eddy currents produced in transformer.Efficiency means the ratio of temperature change and original source temperature.Equating two formulae of efficiency , we get the final result i.e. temperature of hot reservoir.Calculations-
\(\alpha =\frac{dW}{dQ}\)
=18500/6550
Efficiency ⇒ α=2.82
\(\alpha =1-\frac{T2}{T1}\)
2.82= 1- 285/T1
2.82+1= -285/T1
3.82= -285/T1
T1= 285/3.82
=74.607 K
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A student moves a box across the floor by exerting 56.7 N of force and doing 195 J of
work on the box. How far does the student move the box?
A.3.4 m
B. 11,056 m
C.138 m
D.0.29 m
Answer:
A. 3.4 m
Explanation:
Given the following data;
Force = 56.7N
Workdone = 195J
To find the distance
Workdone is given by the formula;
\( Workdone = force * distance\)
Making "distance" the subject of formula, we have;
\( Distance = \frac {workdone}{force} \)
Substituting into the equation, we have;
\( Distance = \frac {195}{56.7} \)
Distance = 3.4 meters.
Objects 1 and 2 attract each other with a gravitational force of 36.0 units. If the mass of the object 1 is doubled and the distance separating objects 1 and 2 is tripled
The net gravitational force will be 9 units.
Therefore, as the mass of either object increases, the attractive force between them also increases. When the mass of either object doubles, the gravitational force between them doubles. Acts along the connecting lines of the particles. where G is the constant of proportionality, a universal constant.
When the mass of an object doubles the force between the objects also doubles. Gravity is directly dependent on the mass of two objects and is inversely proportional to the square of the distance between them. This means that gravity increases with mass and decreases with increasing distance between objects.
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Restate Newton’s third law of motion.
Answer:
The force exerted by one source object on another target object always creates another force at the target object that pushes back on the source object with the same ... or His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.
What happens to the particles of an object when its temperature increases? *
The PE of the particles decreases.
The KE of the particles decreases.
The PE of the particles increases.
The KE of the particles increases.
Answer:KE
Explanation:
Which two options are forms of kinetic energy?
A. Nuclear energy
B. Thermal energy
C. Chemical energy
D. Gravitational energy
E. Sound energy
Answer:
B. Thermal energy
E. Sound energy
Explanation:
Thermal and sound energy is kinetic energy.
Kinetic energy is the energy that results as a function of the motion of a body or the particles of the medium.
Sound energy is transmitted by the vibration of the particles in the air. The vibration leads to movement of the particles and hence, kinetic energy is produced.
Thermal energy originates as a result of the temperature differences in a body. This temperature difference leads to the increase in the kinetic energy of some particles which also causes vibration and motion of the particles.
The two options which are forms of kinetic energy include:
Thermal energySound energyWhat is Kinetic energy?Kinetic energy is the form of energy possessed by a body by virtue of its
motion.
Thermal energy possesses kinetic energy as a result of the high
temperature bringing about an increase in the collision of the particles.
Sound energy also possesses kinetic energy as a result of the vibrations
through the movement of energy in a medium.
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which of the following is the safest use of a life jacket or pfd?
The safest use of a life jacket or PFD (personal flotation device) is to wear it at all times when in or near water, especially when boating or swimming.
It should be properly fitted and adjusted to ensure a snug and comfortable fit. It is also important to choose the appropriate type of life jacket or PFD for the activity and water conditions.
It is recommended to always check the manufacturer's instructions for proper use and maintenance of the device. Additionally, it is important to regularly inspect and replace a life jacket or PFD if it shows signs of wear and tear or damage.
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Ling heard on the news that a high-pressure system is moving into her area. What weather conditions should she expect?
Group of answer choices
clear skies
fog
thunder clouds
sleet
013
A car of mass 1,000 kg begins stationary on a road at the top of a
mountain, at a height h = 3,000 m. The car then rolls freely down a
winding road, travelling a total distance of 5 km, to reach the height h
= 2,000 m. Assume g = 9.8 ms 2.
1
How much energy did the car lose on descent? Give you answer to 3 significant figures,
with units.
Energy lost =
The energy lost by the car on descent is 980×10⁴ J
We'll begin by calculating the energy of car at various heights.
At height 3000 m:Mass (m) = 1000 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) = 3000 m
Energy (E) =?E = mgh
E = 1000 × 9.8 × 3000
E = 29400000 JAt height 2000 m:Mass (m) = 1000 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Height (h) = 2000 m
Energy (E) =?
E = mgh
E = 1000 × 9.8 × 2000
E = 19600000 JFinally, we shall determine the the energy lost
Energy at 3000 m = 29400000 J
Energy at 2000 m = 19600000 J
Energy lost =?Energy lost = Energy at 3000 m – Energy at 2000 m
Energy lost = 29400000 – 19600000
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As Courtney switches on the TV set to watch her favorite cartoon, the electron beam in the TV tube is steered across the screen by the field between two charged plates. If the electron experiences a force of 3.0 × 10^-6 N, how large is the field between the deflection plates?
Answer:
The force experienced by the electron is given by:
F = Eq
where E is the electric field strength and q is the charge of the electron.
The charge of the electron is -1.6 × 10^-19 C.
Substituting the values, we get:
3.0 × 10^-6 N = E(-1.6 × 10^-19 C)
Solving for E, we get:
E = (3.0 × 10^-6 N) / (-1.6 × 10^-19 C)
E = -1.875 × 10^13 N/C
The magnitude of the electric field strength between the deflection plates is 1.875 × 10^13 N/C.
calculate the change of free energy expressed in kj.mol-1) for the hydrolysis of atp in both tissues. note: the reactions in tissues occur at 37°c.
The change in free energy for the hydrolysis of ATP can be calculated using the equation ΔG = ΔH - TΔS, where ΔG is the change in free energy, ΔH is the change in enthalpy, T is the temperature in Kelvin, and ΔS is the change in entropy.
To calculate ΔG for the hydrolysis of ATP in tissues at 37°C, the values of ΔH and ΔS must be known. At 37°C, the temperature must be converted to Kelvin (T = 37 + 273 = 310 K).
The specific values of ΔH and ΔS are required to determine the ΔG for the hydrolysis of ATP in tissues and can be obtained from thermodynamic databases or literature. Without these values, the ΔG cannot be calculated.
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the pressure in solid depends on?
Answer: The pressure of the solid on the surface depends on the area of contact. The greater the force or the smaller the area the greater the pressure.
WHAT IS PHYSICS? OUTLINE THE BRANCHES OF PHYSICS PHYSICS IS AN ESSENTIAL SUBJECT, WHY DO YOU STUDY IT?
i will give brainliest
Answer:
Explanation:
Physics is the natural science that studies matter, its motion and behaviour through space and time and the related entities of energy and force The braches of physics : classical mechanics thermodynamics and statistical mechanics electromagnetism and photons relativistic mechanics quantum mechanics, atomic physics and molecular physics optics condensed matter physics high-energy particle physics and nuclear physics We must study physics to understand how universe worksHaving greater or less electrons possessed by an object. Can attract or repel.
A. proton
B. magnetism
C. charge
D.magnet
Answer:
A. Proton
Explanation:
Given that an electron has a net negative charge equal in magnitude to the charge of a proton (1.602 × 10⁻¹⁹) but having an opposite (negative) sign to that of a proton, and given that like charges (negative to negative) repel and unlike charges attract, an object having;
Greater electron will be negatively charged relative to the other object, to which it is compare, which is a proton will attract the (positively charged) proton
Lesser negative charge compared to the proton; therefore, both objects will be positive, and they will repel each other
We therefore have;
Having greater or less electrons possessed by an object. Can attract or repel a proton
The correct option is option A. proton