The negative angular acceleration required to bring the wheel to rest is approximately -0.126 rad/s^2, and the time needed to bring the wheel to rest is approximately 20.04 seconds.
Step by step explanationLet's first find the initial and final angular velocities of the wheel.
The initial angular velocity is zero because the wheel is initially at rest.
The final angular velocity can be found using the formula:
ωf = ωi + αt
where
ωf = final angular velocity
ωi = initial angular velocity (which is zero)
α = angular acceleration (5.0 rad/s^2)
t = time (8.0 s)
ωf = 0 + (5.0 rad/s^2)(8.0 s) = 40.0 rad/s
The negative angular acceleration can be found using the formula:
Δω = ωf - ωi = αt
where
Δω = change in angular velocity (which is equal to the final angular velocity because the initial angular velocity is zero)
α = angular acceleration (which is negative because the wheel is slowing down)
t = time
So we have:
Δω = 40.0 rad/s
αt = -α(10 rev)(2π rad/rev)/t
where we have converted 10 revolutions to radians (2π radians per revolution).
Setting these two expressions equal to each other and solving for α, we get:
α = -Δω/t = -(40.0 rad/s)/(10 rev x 2π rad/rev x t)
α = -2.53/t rad/s^2
Finally, we can use the formula for angular deceleration to find the time needed to bring the wheel to rest:
ωf^2 = ωi^2 + 2αΔθ
where
Δθ = angle through which the wheel rotates during the deceleration (which is 10 revolutions)
ωf = final angular velocity (which is zero)
ωi = initial angular velocity (which is 40.0 rad/s)
α = angular acceleration (which is negative)
So we have:
0 = (40.0 rad/s)^2 + 2(-2.53/t)(10 rev x 2π rad/rev)
0 = 1600 - 318.48/t
t = 20.04 s
Therefore, the negative angular acceleration required to bring the wheel to rest is approximately -0.126 rad/s^2, and the time needed to bring the wheel to rest is approximately 20.04 seconds.
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A gas of volume 1 l at 10 degree Celsius is heated in such a way that both its volume and pressure become double calculate the final temperature of the gas
Answer:
P V = N R T describes an ideal gas
T2 / T1 = P2 V2 / (P1 * V1) = 4
T1 = 273 + 10 = 283 initial absolute temperature of gas
Thirteen resistors are connected across points A and B as shown in the figure. If all the resistors are
accurate to 2 significant figures, what is the equivalent resistance between points A and B?
The equivalent resistance between points A and B in the diagram is 22 Ω
How do I determine the equivalent resistance?We shall begin by obtaining the equivalent resistance in parallel (i,e the three 6 Ω resistor). Details below:
Resistor 1 (R₁) = 6 ΩResistor 2 (R₂) = 6 ΩResistor 3 (R₃) = 6 ΩEquivalent resistance (Rₜ) = ?1/Rₜ = 1/R₁ + 1/R₂ + 1/R₃
1/Rₜ = 1/6 + 1/6 + 1/6
1/Rₜ = 3/6
1/Rₜ = 1/2
Rₜ = 2 Ω
Finally, we shall determine the equivalent resistance between A and B (i.e series arrangement). Details below:
Resistor 1 (R₁) = Resistor 2 (R₂) = ... = Resistor (R₁₁) = 2 ΩEquivalent resistance (R) =?R = R₁ + R₂ + R₃ + R₄ + R₅ + R₆ + R₇ + R₈ + R₉ + R₁₀ + R₁₁
R = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2
R = 22Ω
Thus, we can conclude that the equivalent resistance is 22 Ω
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Which of the following provided the best definition as to what is gravity? Group of answer choices What goes up must come down Everything with mass is attracted to everything else with mass Only small things are attracted to larger things Only larger things are attracted to smaller things
The statement that everything with mass is attracted to everything else with mass is the best definition of gravity.
What is gravity?In the field of physics, gravity is a basic interaction that causes all objects with mass or energy to attract one another. This force is present everywhere in the universe, and is the reason why all the planets in the solar system orbit around the sun.
From the group of answer choices, "Everything with mass is attracted to everything else with mass" is correct, since it describes the natural phenomenon by which all objects in the universe are attracted to one another.
The statement "What goes up must come down" is a simple observation of gravity's effects on objects on Earth, but it does not provide a complete definition of the force itself.
"Only small things are attracted to larger things" and "Only larger things are attracted to smaller things" are incorrect, as gravity acts on all objects with mass, regardless of their size.
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PHYSICAl SCIENCE : How do jewelers detectives antique dealer or other scientist could use electromagnetic waves to determine the composition of unknown materials in the course of their jobs?
Answer: It detects any waves or any substance.
Explanation: Don't really know how to explain it but it detects specific stuff on every material, like a demand for Example, if it is real then it could scratch glass but glass couldn't scratch it.
Carlos was playing on a slide on a sunny summer day. Which property of the slide tells Carlos how much energy the slide absorbed from the Sun?
O the mass
O the color
O the height
O the temperature
Answer:
Its D
Explanation:
just did It :)
Calculate the velocity of a 9.3 kg object that has 5.4 kgm/8
Answer:
To calculate the escape velocity: Find the object's mass in kilograms, m, and its radius in meters, r. Multiply m by the gravitational constant (6.674 × 10 −11) and then by 2. Divide the result of step 2 by r. Raise the result of step 3 by 0.5. The result is the escape velocity
Explanation:
8. Inferring When cars pass one another in
opposite directions on the highway, they tend
to be forced together. Use Bernoulli's principle
to explain why this happens.
someone help please
Bernoulli's principle can be used to explain the motion of cars on the highway as the cars moving fast create areas of low pressure around them, causing them to be pushed together by the higher pressure.
What is Bernoulli's principle?Bernoulli's principle can be formulated by Daniel Bernoulli. The principle states that as the speed of a moving fluid increases such as liquid or gas, the pressure within the fluid decreases through it. Although, Bernoulli deduced this law, it was Leonhard Euler who derived the Bernoulli's equation in its usual form in the year 1752.
When the two cars passes one another in opposite directions on the highway, then they tend to be forced together. Use the Bernoulli's principle to explain why this happens with the cars. The cars moving fast on the highway create areas of low pressure around them, causing them to be pushed together by the higher pressure.
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help as soon u can pls! due in 45 mins!!
Which statement correctly represents a mineral?
1. any naturally forming substance made from one element
2. any chemical substance which forms naturally in the Earth
3. an element which is made into an object
4. any substance which develops in the ground
Minerals are any chemical substance which forms naturally in the Earth
Define mineral.
Minerals are those substances found in foods and in the earth that our systems require for healthy growth and development. Calcium, phosphate, potassium, sodium, chloride, magnesium, iron, zinc, iodine, chromium, copper, fluoride, molybdenum, manganese, and selenium are among the nutrients that are crucial for good health.
Compounds found only in living creatures are typically not considered minerals according to geological definitions. However, some minerals, like calcite, are frequently biogenic or, in terms of chemistry, are organic molecules (such as mellite). Additionally, living things frequently produce inorganic crystals (like hydroxylapatite), which are also found in rocks.
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1. A ball is thrown horizontally at a height of 4.91 m above the ground. It has an initial speed of 16.0 m/s. How long will it take to drop to the ground? How far, measured horizontally from the launch point, will it strike the ground?
It will take the ball 1 s to drop to the ground
The distance from the launch point where the ball will strike the ground would be 16.0 m.
Projectile motionWe can use the kinematic equations of motion to solve this problem. The vertical motion of the ball can be described using the equation:
h = vit + 1/2g*t^2
where h is the initial height, vi is the initial vertical velocity (which is zero), g is the acceleration due to gravity (9.8 m/s^2), and t is the time taken to fall to the ground. Solving for t, we get:
t = sqrt(2h/g) = sqrt(2*4.91 m/9.8 m/s^2) = 1 s
The horizontal motion of the ball is uniform, since there is no horizontal acceleration. We can use the equation:
d = v*t
where d is the distance traveled, v is the initial horizontal velocity (which is 16.0 m/s), and t is the time taken to hit the ground (which is 1 s). Solving for d, we get:
d = v*t = 16.0 m/s * 1 s = 16.0 m
So the ball will strike the ground 16.0 meters away from the launch point, measured horizontally.
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A 50g
block is attached to a
horizontal spring with spring
constant k = 3600 N/m
The spring is compressed by 5 cm,
as shown in the figure.
When the spring is released, will the
block be able to cross the top of the hill with
h =10m?
The spring can not cross the hill.
What is the elastic potential energy?Elastic potential energy is the potential energy stored in an object when it is deformed, or stretched or compressed, by a force. When an elastic object is stretched or compressed, it has the potential to return to its original shape and size, and the work done to stretch or compress it is stored as elastic potential energy.
We know that;
E = 1/2Ke^2
E = 0.5 * 3600 * (5 * 10^-2)^2
E = 4.5 J
Now the GPE of the hill is;
mgh = 50 * 10^-3 * 10 * 9.8
= 4.9 J
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Gravitational potential energy is the energy stored in an object due to its height
above a reference level. Which of the following choices best describes the
correct formula of gravitational potential energy?
ΔU = mgh is the expression to Gravitational Potential Energy for Height (h).
What kind of energy from gravitational potential is that?A book on even a high shelf, for instance, has more energy potential than a book here on bottom shelf since it requires a longer distance to fall. Items having gravitational potential energy can also include the following: a heavier burden. water retentive to a dam.
Why does kinetic energy differ from gravitational potential energy?The energy held within an item as a result of its height above the ground is known as gravitational potential energy. The object's height, gravitational acceleration caused by the Earth, and mass all play a role in this. The energy an item possesses as a result of its motion is known as kinetic energy.
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Help quick.
Two objects, m1 and m2, have an elastic collision. The initial velocity of m1 is +6.0 m/s and of m2 is +4.0
m/s. After the collision, the velocity of m1 is +5.0m/s. What is the velocity of m2?
Answer:
u
1
=
6.0
m
/
s
u
2
=
4.0
m
/
s
v
1
=
5.0
m
/
s
Explanation:
Sonu is observing his image in a plane mirror. The distance between the mirror and his image is 4 m. If he moves 1 m towards the mirror, the distance between Sonu and his image will be: (a) 3 m (b) 5 m (c) 6 m (d) 8 m
Answer:
Originally Sonu and image is 8 m (4 m to mirror and 4 m to image)
If he moves 1 m towards the mirror the image distance will be reduced to (c) 6 m
Answer question in photo
The potential energy of an object is the product of its mass, acceleration due to gravity and height of the object from the surface. Here, the potential energy of the object is 3118.2 J.
What is potential energy ?Potential energy of an object is the energy generated by virtue of its position. It is the energy stored on the object when it is at rest. When the object starts moving its potential energy starts to convert to kinetic energy.
the potential energy of an object is related to its mass, acceleration due to gravity g and height from the surface h as:
P = mgh.
then, m = 26.21 Kg
h = 12.14 m
g = 9.8 m/s²
p = 26.21 Kg × 9.8 m/s² × 12.14 m = 3118.2 J.
Therefore, the potential energy of the object is 3118.2 J.
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Answer question in the photo
A weight lifter does 1700.44 Joules of work to lift the barbell from the floor to a height of 9.90 meters.
How to solve for work done?To calculate the work done by the weightlifter, we need to use the formula:
Work = force x distance x cos(theta)
where force is the weight of the barbell, distance is the height it is lifted, and theta is the angle between the force and the direction of motion. Since the weightlifter is lifting the barbell straight up, theta is 0 degrees and cos(theta) is 1.
So, we have:
Work = 171.60 N x 9.90 m x 1
Work = 1700.44 Joules
Therefore, the weightlifter does 1700.44 Joules of work to lift the barbell from the floor to a height of 9.90 meters.
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An object is moving at a velocity of 11.5 m/s to the left. How far does it move in
312.24 seconds?
Answer:
[tex]\huge\boxed{\sf d = 3590.76\ m}[/tex]
Explanation:
Given data:Velocity = v = 11.5 m/s
Time = t = 312.24 s
Required:Displacement = d = ?
Formula:d = v × t
Solution:d = 11.5 × 312.24
d = 3590.76 m[tex]\rule[225]{225}{2}[/tex]
Identify What limits the speed at which the ball will leave the racket?
The maximum speed at which the racket can move is limited by the physical ability of the player.
What limits the speed at which the ball will leave the racket?The speed at which a ball leaves a racket is determined by several factors, including the speed of the racket at impact, the angle of the racket face, and the properties of the ball itself.
The maximum speed at which the racket can move is limited by the physical ability of the player. A player can only swing the racket so fast before they reach their physical limits. Additionally, the angle at which the racket strikes the ball affects the ball's speed. If the racket face is angled too steeply or too shallowly, it can decrease the speed of the ball.
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How does changing the distance influence the force between the two charges?
As the distance __________, the absolute value of the force ___________.
increases; increases
increases; decreases
increases; does not change
decreases; does not change
Explanation:
As the distance increases, the absolute value of the force decreases. Therefore, the correct answer is "increases; decreases". This is in accordance with Coulomb's Law, which states that the force between two charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them. As the distance between the charges increases, the force between them decreases because the inverse square relationship causes the force to weaken rapidly with distance.
pls help i need it for tomorrow
An unexpected result is examined a lot more closely, since it must disagree with some currently accepted theory to be accepted as unexpected.
What is an example of a hypothesis ?A scientist may develop the hypothesis that a given type of tomato will be red if it carries the gene for the colour red. The scientist then discovers that every tomato of this variety is red during investigation.
Hypotheses are frequently employed to promote scientific research and enhance knowledge. These clear declarations serve as the cornerstone for all research experiments.
Therefore, a problem in the creation of a hypothesis may lead to errors in the design of a whole experiment.
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Heat is defined as
A.
the average kinetic energy of the particles that make up an object.
B.
the energy stored in an object due to the position of its particles.
C.
the sum total of all the kinetic energy of the particles within an object.
D.
the amount of thermal energy transferred from one object to another.
Reset Next Question
The kinetic energy of an object is the energy that is associated with its motion. The average kinetic energy of the particles that make up an object is a measure of the temperature of the object.
What is kinetic energy?
Kinetic energy is the energy that an object possesses due to its motion. Any object that is moving has kinetic energy. The amount of kinetic energy that an object has depends on its mass and its velocity. The equation for calculating the kinetic energy of an object is KE = 0.5 * m * v^2, where KE is the kinetic energy, m is the mass of the object, and v is the velocity (speed) of the object.
The correct answer is A: the average kinetic energy of the particles that make up an object.
The kinetic energy of an object is the energy that is associated with its motion. The average kinetic energy of the particles that make up an object is a measure of the temperature of the object. The higher the temperature of an object, the greater the average kinetic energy of its particles.
Option B describes potential energy, which is the energy stored in an object due to the position of its particles. This energy can be converted into kinetic energy if the object is allowed to move.
Option C describes thermal energy, which is the total energy of all the particles within an object, including both kinetic and potential energy.
Option D describes heat transfer, which is the transfer of thermal energy from one object to another due to a temperature difference.
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A constant force is applied to an object, causing the object to accelerate at 6. 00 m/s2. What will the acceleration be if
The rate of acceleration if force is doubled is same, if the objects mass is doubled it is halved, if both the object mass and force are doubled the acceleration will be same , d- acceleration will be quadrupled
Newton's second law of motion states that force is equal to mass multiplied by acceleration: F = m * a, where F is the applied force, m is the object's mass, and an is the acceleration produced.
a- When the force is doubled, the acceleration doubles as well. Using the formula, we get:
F' = 2F
a' = F' / m = (2F) / m = 2F / (2m) = F / m = a
B- If the mass is doubled, the acceleration will be halved. Using the equation, we get:
m' = 2m
a' = F / m' = F / (2m) = a / 2
C- If both the force and the mass are doubled, the acceleration will remain the same. Using the equation, we get:
F' = 2F
m' = 2m
a' = F' / m' = (2F) / (2m) = F / m = a
D- If the force is doubled and the mass is halved, the acceleration will be quadrupled. Using the equation, we get:
F' = 2F
m' = m / 2
a' = F' / m' = (2F) / (m/2) = 4F / m = 4a
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The complete question is:
When a constant force is applied to an object, it accelerates at 6.0 m/s2. What will be the rate of acceleration if
the force doubled?
the object's mass doubled?
Both the force and the mass of the object are doubled?
The force is doubled, but the object's mass is cut in half?
On Saturday nights, Greg, likes to go to the Frisco Disco, where he can dance under the strobe light. The strobe contains a 200, u capacitor that stores charge over a 1000 V potential difference. If the strobe flashes 4 times each second, what is the current flow created by the strobe's capacitor?
Explanation:
The current flow created by the strobe's capacitor can be calculated using the formula:
I = C * (ΔV / Δt)
where I is the current flow, C is the capacitance, ΔV is the potential difference, and Δt is the time interval between flashes.
Substituting the given values, we get:
I = 200 * 10^-6 F * (1000 V / 1 s) * 4
Simplifying this expression, we get:
I = 0.8 A
Therefore, the current flow created by the strobe's capacitor is 0.8 amperes
If an object with a charge of 0.08 C experiences an electric force of 5.0 what is the electric field strength ?
Please show your work this is due today. Giving out brainliest.
Answer:
The electric field strength 62.5 N/C.
Explanation:
The electric force (F) on an object with charge q in an electric field with strength E can be calculated using the formula:
F = qE
Rearranging this formula, we can solve for the electric field strength:
E = F / q
In this case, the object has a charge of q = 0.08 C and experiences an electric force of F = 5.0 N. Substituting these values into the formula, we get:
E = 5.0 N / 0.08 C
E = 62.5 N/C
So, the electric field strength is 62.5 N/C.
A caterpillar climbs 1.3 m up a tree, then 0.72 m right, out onto a limb to eat a leaf. What is the magnitude of the resultant displacement of the caterpillar? A 2.2 m , B1.4 m ,C 1.5 m ,D 1.1 m
The magnitude of the resultant displacement of the caterpillar is 1.4m. Therefore, option B is correct.
What is displacement?The change in the position of an object is called displacement, it is the distance between starting and endpoints. It has both magnitude and direction, it is a vector quantity.
If a caterpillar climbs 1.3 m up a tree, then 0.72 m right, the magnitude of resultant displacement is given by:
H² = P² + B²
H² = (1.3)² + (0.72)²
H² = 1.69 + 0.51
H = [tex]\sqrt2.2[/tex]
H = 1.4m
Thus, the magnitude of the resultant displacement of the caterpillar is 1.4m. Therefore, option B is correct.
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What would be its orbital velocity if Ingenuity is on the surface of Mars?
For the answer, type in your answer (in standard notation, not scientific
notation). Do not write units.
Include two numbers after the decimal (the hundredths place).
The orbital velocity, if Ingenuity is on the surface of Mars is 3549.67 m/s
What is Orbital Velocity ?Orbital velocity is also called as critical velocity. It is minimum velocity must be given to the satellite or the body, so that it can revolve around the planet. i.e. orbital velocity is minimum velocity of body to revolve in stable orbit around a planet.
Orbital velocity is given by,
[tex]v_{c} =\sqrt{\frac{GM}{R+h}}[/tex] where G = Gravitational constant (6.673×10⁻¹¹ Nm²/kg²)
M = Mass of the planet
R = Radius of the planet
h = height of the object(satellite)
Orbital velocity depends on mass of the planet, radius of the planet and height of the object(satellite). It is independent of mass of the body(satellite).
Given,
M = 6.42×10²³ kg
R= 3.4×10⁶ m
h= 0 m (our body is on surface of the mars so)
Putting these values in the equation.
[tex]v_{c} =\sqrt{\frac{GM}{R}}[/tex] = [tex]\sqrt{\frac{(6.673*10^{-11}) (6.42*10^{23}) }{3.4*10^{6}}}[/tex]
[tex]V_{c}[/tex]= 3549.67 m/s
Hence Orbital velocity of Ingenuity on the surface of Mars 3549.67 m/s
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As shown in the diagram, two metal-coated pith balls are suspended by a thread and given a charge so they are held apart by a force of repulsion. Which diagram best shows the position of the pith balls after they are both touched by an experimenter's finger?
The pith balls are having same charge and that is why they are held apart by the force of repulsion. When they both touched by the experimenter's finger they both gets attracted to the finger and comes in contact as in B.
What is electrostatic force ?Electrostatic force between two charges are arise when the charged bodies comes in contact. There are both force of attraction and repulsion. The electrostatic force of attraction results from the two unlike charges and the force of repulsion arise between two like charges.
Here, the pith balls are charged alike, hence they will get repelled. Ig they are negatively charged, the electrons will flow from them to the other body in touch.
When the experimenter touch his finger on the charged ball, the finger gets polarized and attracted to the ball , they gets in contact as in figure B.
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PLEASE HELP!! HURRYY
If a step down transformer has 220 V coming into the primary coil of 30 turns and 140 V is coming out of the second coil, how many turns in are in the secondary coil?
a.) 30
b.) 19
c.) 0.05
d.) 7
Answer:
We can use the formula for the transformer voltage ratio, which states that the ratio of the number of turns in the primary coil to the number of turns in the secondary coil is equal to the ratio of the output voltage to the input voltage:
Np/Ns = Vp/Vs
where Np is the number of turns in the primary coil, Ns is the number of turns in the secondary coil, Vp is the input voltage, and Vs is the output voltage.
We know that Vp = 220 V and Vs = 140 V, and we are trying to find Ns. We also know that Np = 30, since that is the number of turns in the primary coil. Substituting these values into the formula, we get:
30/Ns = 220/140
Simplifying the right side of the equation, we get:
30/Ns = 11/7
Cross-multiplying, we get:
11Ns = 210
Dividing both sides by 11, we get:
Ns = 19
Therefore, the answer is b.) 19.
Which two statements describe force?
A. A force can be a push or a pull
B. Force cashes an objects motion to remain constant
C. Force is the ability to change an objects motion
D. A force can have mass or weight
Answer:
A. A force can be a push or pull
D. A force can have mass or weight
How much heat is needed to change 7.2 kg of solid ethyl alcohol at "-211*C" to liquid at 50.0*C?
Please show all work! Thank you!
There is a requirement for 1,638,000 Joules of heat.
How do you convert joules into heat?Q=I2Rt provides the Joule's heating formula. Joule's heating formula states that the amount of heat produced is proportional to the length of time that the electrical resistance and current are both constant.
The following equation must be used:
Q = m × Lfus + m × Cp × ΔT
Ethyl alcohol has a heat of fusion of 105 J/g and a specific heat capacity of 2.44 J/g°C.
The amount of ethyl alcohol is specified as 7.2 kg, or 7,200 g.
The ethyl alcohol must be melted at a temperature of:
Q1 = m × Lfus =
7,200 g × 105 J/g
= 756,000 J
In order to raise the temperature of the liquid ethyl alcohol from 0°C to 50°C, we must determine the amount of heat needed:
ΔT = 50°C - 0°C
= 50°C
The amount of heat required to raise the temperature of the liquid ethyl alcohol is:
Q2 = m × Cp × ΔT
= 7,200 g × 2.44 J/g°C × 50°C
= 882,000 J
As a result, the total amount of heat needed to transform 7.2 kg of solid ethyl alcohol from -211°C to 50.0°C into a liquid is:
Q = Q1 + Q2 = 756,000 J + 882,000 J
= 1,638,000 J
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a sound wave strikes a wall normally what is the angle of reflection of sound wave
a 90°
b 60°
c 45°
d 0°
Answer:
C
Explanation:
