The tuning forks will give rise to a beat frequency are 220 Hz and 260 Hz.
Tuning forks are available in a wide range of frequencies (64 Hz to 4096 Hz); 128 Hz is a commonly used frequency for screening.
Beat frequency formed by the tuning fork is given by: \(f_{beat} = f_1 \pm f_2\).
Here, the beat frequency, \(f_{beat} = 20 Hz\).
The frequency of a tuning fork, \(f_2 = 270\ Hz\).
If \(f_{beat} = f_1 + f_2\),
\(f_1 = 20-240\)
\(f_1 = 220\ Hz\)
If \(f_{beat} = f_1 - f_2\),
\(f_1 = 20+240\)
\(f_1 = 260\ Hz\)
So, the tuning forks will give rise to a beat frequency are 220 Hz and 260 Hz. Hence, this is the required solution.
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--The complete question is, Two tuning forks are sounded at the same time. which tuning forks will give rise to a beat frequency of 20 hz when sounded together with a 240 hz tuning fork?--
the image represents a sound wave as it goes through several changes. Describe how the waves changes. where does it get louder? where does it get softer?how does the pitch change? how do you know?
someone please help me TvT
Answer:
At point A. it gets kinda loud then at point B. it gets very loud than at point C. it gets quieter than at point D. it gets more silent.
Explanation:
Because you can tell when the waves get large it gets louder and then when the waves get more far apart then it get more quiet. Hope this helped!
¿Cuál de las siguientes no es un tipo de fuerza de roce
the coefficient of static friction between the floor of a truck and a box resting on it is 0.29. the truck is traveling at 68.2 km/hr. what is the least distance in which the truck can stop and ensure that the box does not slide?
We know that the coefficient of static friction between the floor of a truck and a box = μ = 0.29.
Truck is traveling at 68.2 km/hr (v), where v is the velocity of the truck.
Let us now find the least distance in which the truck can stop and ensure that the box does not slide by:
The formula for stopping distance is :d = v² / 2μgd
where v = velocity, μ = coefficient of static friction and g = acceleration due to gravity
Therefore d = 68.2² / 2 * 0.29 * 9.8= 168.47 meters.
Hence the least distance in which the truck can stop and ensure that the box does not slide is 168.47 meters.
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A car started from rest and moved along a straight road with constant acceleration of 2.0m/s-² for 6s.Calculate the speed of the car 6s after starting to move.
Answer:
The speed of the car 6 s after starting to move is 12 m/s.
Explanation:
A car started from rest and moved along a straight road with constant acceleration of \(2\ m/s^2\) for 6 seconds.
It is required to find the speed of the car 6 s after starting to move. Let v is the final speed of the car.
The relation between speed, acceleration and time is given by :
\(v=u+at\)
u = 0
\(v=at\\\\v=2\ m/s^2\times 6\ s\\\\v=12\ m/s\)
So, the speed of the car 6 s after starting to move is 12 m/s.
An air conditioner uses a compressor to raise the temperature and pressure of _____. A. The outside air
B. The refridgerant
C. The inside air
Answer:
B. The refridgerant
Explanation:
this allows the refrigerant to absorb or release heat
To sustain laser action it is usually necessary to place the lasing material between the two mirrors of an optical cavity. Why? a. The Pauli exclusion principle requires that the photons have different quantum numbers. The cavity guaranties this. b. This is required by the uncertainty principle.c. The mirrors produce thin-film interference, which enhances laser action. d. Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission. e. We have to confine the photons, because confinement leads to energy quantization.
Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission. The correct answer is d.
Placing the lasing material between the two mirrors of an optical cavity allows the photons to bounce back and forth through the lasing medium, increasing the probability of stimulated emission and amplifying the light to produce a laser beam. This process is essential for the sustained laser action. The Pauli exclusion principle and energy quantization may be relevant to the behavior of atoms and electrons in the lasing material, but they do not directly explain the need for an optical cavity. The uncertainty principle and thin-film interference are also not directly related to the function of an optical cavity in laser operation.
To sustain laser action, it is usually necessary to place the lasing material between the two mirrors of an optical cavity because:
d. Photons are reflected back and forth through the lasing medium, which greatly increases the probability of stimulated emission.
The optical cavity allows photons to travel back and forth through the lasing medium, increasing the chances of interacting with excited atoms and causing stimulated emission. This process amplifies the light, leading to the production of a coherent laser beam.
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Define atomicity and valency.
Answer:
Atomicity →The number of atoms in the molecules of an element.Valency → The property of an element that determines the number of other atoms with which an atom of the element can combine.A 1210-kg car travels 1. 20 km up an incline at constant velocity. The incline is 15° measured with respect to the horizontal. The change in the car's potential energy is
The change in the car's potential energy is approximately 3,615,124 joules.
The change in the car's potential energy can be calculated using the formula:
ΔPE = m * g * h
where:
ΔPE = change in potential energy
m = mass of the car (1210 kg)
g = acceleration due to gravity (approximately 9.8 m/s²)
h = change in height
In this case, the change in height can be determined by calculating the vertical displacement of the car as it travels up the incline.
The vertical displacement (h) can be calculated as:
h = d * sin(θ)
where:
d = distance traveled along the incline (1.20 km = 1200 m)
θ = angle of the incline (15°)
Substituting the values:
h = 1200 m * sin(15°)
h ≈ 308.41 m
Now, we can calculate the change in potential energy:
ΔPE = (1210 kg) * (9.8 m/s²) * (308.41 m)
ΔPE ≈ 3,615,124 J (joules)
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Why does the Moon orbit Earth?
a
There is magnetic attraction between the Earth and
the Moon
b
There is gravitational attraction between the Earth
and the Moon
с
There is chemical attraction between the Earth and
the Moon
d
There is mechanical attraction between the Earth
and the Moon
Answer:
B
Explanation:
Gravity, the attractive force between all masses, is what keeps the planets in orbit. Newton’s universal law of gravitation relates the gravitational force to mass and distance
The force of gravity is what gives us our sense of weight. Unlike mass, which is constant, weight can vary depending on the force of gravity (or acceleration) you feel. When Kepler’s laws are reexamined in the light of Newton’s gravitational law, it becomes clear that the masses of both objects are important for the third law, which becomes a3 = (M1+ M2) × P2. Mutual gravitational effects permit us to calculate the masses of astronomical objects, from comets to galaxies.
how much does the angle of refraction change from 380nm to 700nm when the incident angle is 80?
Answer:
35 degrees
Explanation:
The incident angle, an 80-degree angle, and as the angle of incidence increases, the amount of refraction also increases. So, we can expect a significant change in the angle of refraction from blue to red light at an 80-degree angle of incidence.
What is refraction?Refraction refers to the bending of light when it passes from different mediums.The amount of refraction that occurs at an interface between two materials depends on the wavelength of light, the angle of incidence, and the properties of the materials. The relationship between these factors is described by Snell's law:
n1 sinθ1 = n2 sinθ2
where n1 and n2 are the refractive indices of the two materials, θ1 is the angle of incidence, and θ2 is the angle of refraction.
For a given angle of incidence, the amount of refraction that occurs is greater for shorter wavelengths (i.e., blue light) than for longer wavelengths (i.e., red light). This effect is known as dispersion, and it is why we see rainbows when sunlight is refracted through water droplets.
In the absence of any information about the properties of the materials involved, we can assume that the amount of refraction will increase as the wavelength decreases.
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A piece of metal of ma 50g heated to 100degree i dropped into 200g of water at 14 degree in copper calorimeter weighing 80g and raie the temperature to 70degree what i the pecific heat capacity of the metal
The specific heat capacity of the metal is 32427.7 J/kg/°C if the mass of a metal is 50 gm.
The specific heat capacity of a substance is the heat required to increase the temperature of the substance of unit mass by one degree. Its SI unit is J/kg/°C.
Mass of the metal= 50 g= 0.05 kg
Temperature of the metal = 100°C
Mass of the water = 200 g = 0.2 kg
Mass of the calorimeter = 80 g =0.08 kg
Temperature of the calorimeter and water combined= 14°C
Equilibrium temperature = 70°C
Specific heat capacity of the copper = 390 J/kg/°C
Specific heat capacity of the water = 4187 J/kg/°C
Heat lost by the metal = heat absorbed by the water and calorimeter
0.05×S×(100-70) = (0.2×4187+0.08+390) × (70-14)
1.5×S = 48641.6
S= 32427.73 J/Kg/°C
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1. A race car accelerates uniformly from 19.5 m/s to 50.1 m/s in
2.47 seconds. Determine the acceleration of the car.
The acceleration of the car is 79.8.
Answer:
12.39m/s²
Explanation:
use the formula a=v-u
t
What is the length of the x-component of the vector shown below?
The length of the x-component of the vector is approximately 48.55 units.
What is the length of the x-component of the vector?To find the length of the x-component of the vector, we need to use trigonometry.
We can use the angle and the magnitude (length) of the vector to find the x-component using the formula:
x-component = magnitude x cos(angle)
Plugging in the values given, we get:
x-component = 52 units x cos(21⁰)
x-component = 52 units x 0.9336
Multiplying these two numbers, we get:
x-component ≈ 48.55 units
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Oxygen is needed for the reactions that cause artifacts to decay in the ocean.
Some ancient shipwrecks have been well-preserved deep in the ocean.
Review the information in the data table. Which statement about the
relationship between rates of reaction and concentration of reactants is true?
Object
Location
Decay time
Average
concentration of
oxygen
Wooden ship
Deep ocean
Very low
1,000 years
Wooden rowboat Shallow beach
High
1 to 2 years
O A. Reactions are faster when there is a lower concentration of
reactants.
Answer: The answer is C.
Explanation:Just took the quiz
The statement about the relationship between rates of reaction and concentration of reactants true is reactions are slower when there is lower concentration of reactants.
What is chemical reaction?The chemical reaction is the reaction between two reactants which led to the formation of products.
The products are substances which forms after reaction. The reactants are the substances which are original materials.
Oxygen is needed for the reactions that cause artifacts to decay in the ocean.
Some ancient shipwrecks have been well-preserved deep in the ocean.
Reviewing the information in the data table, we conclude that reactions are slower when there is lower concentration of reactants.
Thus, the correct option is C.
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A teacher conducts an experiment in class to show the importance of physical properties in classifying matter. You have six samples of different materials with the same mass of 12 grams(g). Some samples are larger than others, but they all have the same mass. The teacher classified the samples into two groups based on a single physical property. Then, he asked the students: Which physical property would you most likely have used to classify the samples into these two groups?
Physical and chemical qualities are present in all matter.
What are Physical properties?Physical qualities, such as mass, color, and volume, are characteristics that may be measured by scientists without modifying the makeup of the sample being studied (the amount of space occupied by a sample).
Chemical characteristics, such as flammability and susceptibility to corrosion, define a substance's distinctive capacity to reacted to generate new substances. A pure substance's chemical and physical properties are the same in all samples.
Extensive or intensive physical properties are both possible. The substance's extensive attributes, such as mass, weight, and size, change with the amount present.
Therefore, Physical and chemical qualities are present in all matter.
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A resistor is a device that converts chemical energy into electrical energy. Is this true or false?
The device that converts chemical energy into electrical energy is a battery.
On the other hand, the resistor is a passive element that is mainly used to limit the current in a circuit.
A resistor doesn't convert chemical energy into electrical energy.
Therefore, we can conclude that the given statement is false
What will the phase of the moon be in the diagram?
what will be the acceleration of vehicle if it started to move from rest and its velocity reached 12m/s after 4 second
Answer:
First of all, what is acceleration? — Acceleration is the rate of change of velocity per unit of time.
Now, we know that velocity is a vector quantity i.e we need both magnitude and direction to define it and so is acceleration. We can now say that in acceleration, the direction of motion is very important or to define acceleration we need both the magnitude of motion (here it is the speed) and its direction.
Now coming to your question. There are two possible answers to this question.
more
,Case 2 — When the body is not moving in a straight line or is constantly changing its direction. In this cas the speed still is constant but the direction is constantly changing, for example in the case of a circular motion the direction of motion constantly changes (the direction of a moving body in a circular path at any point is the direction of the tangent of the circle at that point). Hence the velocity changes as the body move along the circular or curved path.
Now, as I earlier mentioned to define acceleration we need to know it's magnitude and it's direction, and acceleration is the rate of change of velocity per unit of time — the speed remaining constant the direction constantly changing, and the velocity changes at different time intervals or rate of change of velocity is ≠ 0 unlike in case 1. Since there is the of and a change in velocity (speed constant but the direction is changing) there is some acceleration.
To sum everything up — in the case of linear motion i.e motion in a straight line when the speed is constant and direction is not changing, velocity will be zero and hence acceleration would be zero. In case of a non-linear motion i.e motion not in a straight line, in a circle or any path where the speed is constant but the direction is constantly changing, velocity will not be zero and hence the acceleration would not be equal to zero. Either it would be greater or less than zero.
to pass a slow-moving truck, you need your 1300 kg car to accelerate from 13.4 m/s to 17.9 m/s in 3 seconds. what is the power required to pass
Answer:
P = E / t definition of power
P = (1/2 m v2^2 - 1/2 m v1^2) / t
P = m / (2 * t) * (v2^2 - v1^2)
P = 1300 kg / 6 sec * (17.9^2 - 13.4^2)
P = 217 * 141 = 30,600 J/sec
The power required to pass the slow-moving truck is 34,905 watts.
What is power?Power is a physical quantity that measures the rate at which work is done or energy is transferred. It is defined as the amount of energy transferred or work done per unit time. The SI unit of power is watts (W), which is equivalent to joules per second (J/s).
In simpler terms, power is the rate at which energy is used or work is done. It is a measure of how quickly something can accomplish a certain task or transfer energy. The greater the power of a system, the faster it can perform a given amount of work.
Power = Work done / time taken = Force x distance/time taken
Here in the Question,
To calculate the power required to pass the slow-moving truck, we need to use the formula:
Power = Force x Velocity
where Force is the net force acting on the car and Velocity is the final velocity of the car after acceleration.
To find the force, we can use Newton's second law of motion:
Force = mass x acceleration
where mass is the mass of the car and acceleration is the change in velocity over time.
Given:
Initial velocity, u = 13.4 m/s
Final velocity, v = 17.9 m/s
Time, t = 3 s
Mass of car, m = 1300 kg
The acceleration can be calculated using the formula:
Acceleration = (Final velocity - Initial velocity) / Time
Acceleration = (17.9 m/s - 13.4 m/s) / 3 s
Acceleration = 1.5 m/s^2
Now we can calculate the force:
Force = mass x acceleration
Force = 1300 kg x 1.5 m/s^2
Force = 1950 N
Finally, we can calculate the power required to pass:
Power = Force x Velocity
Power = 1950 N x 17.9 m/s
Power = 34,905 W
Therefore, the power required to pass the slow-moving truck is 34,905 watts (or approximately 35 kW).
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which two changes would increase the electric force between two charged particles
In electrostatics, the electrical force between two charged objects is inversely related to the distance of separation between the two objects. Increasing the separation distance between objects decreases the force of attraction or repulsion between the objects.
hope this helped
Drag each tile to the correct box. Arrange the steps in order to describe what happens to a gas when it cools. The particles of gas move slower. The gas changes to a liquid. The gas loses thermal energy. The space between the gas particles decreases. ↓ ↓ ↓
Answer:
Ok, as the gas starts to cool down, the kinetic energy of the particles starts to decrease, so the first thing that happens is:
"the gas loses thermal energy" (as the gas cools down, the temperature decreases, so it loses thermal energy)
Now, the kinetic energy must decrease, so now:
"the particles of gas move slower".
Then, as the particles start to move slower, they start to get closer to eachother, then we have:
"The space between the gas particles decreases."
As the particles start to get close to eachother, the density of the gas starts to increase, until a point where we get to the condensation point, here we have a change of phase and the gas changes to a liquid, so here we have:
"The gas changes to a liquid."
Answer:
a
Explanation:
How can water boil without heat?
Answer:
Put water at room temperature into a vacuum chamber and begin removing the air. Eventually, the boiling temperature will fall below the water temperature and boiling will begin without heating. Or if you want to be easy but messy, add dry ice to a bowl of water and watch how the water starts to boil.
A spring (k= 100 N/m) that is initially compressed launches a solid small toy ball of mass 0.250 kg from rest along a horizontal surface as shown. the ball does not slip ( meaning it is moving to the right and also rolling) as it moves to the right. If the balls final linear speed is 6.8 m/s find the initial compression distance of the spring
Given data:
The mass of the ball is m=0.25 kg.
The spring constant is k=100 N/m.
The speed of the ball is v=6.8 m/s.
The amount of energy stored in the spring in the form of elastic potential energy will equal to the kinetic energy of the ball. It can be applied as,
\(\begin{gathered} PE=KE \\ \frac{1}{2}kx^2=\frac{1}{2}mv^2 \end{gathered}\)Here, x is the compression in the spring.
Substitute the given values in above equation,
\(\begin{gathered} \frac{1}{2}(100)x^2=\frac{1}{2}(0.25)(6.8)^2 \\ x=0.34\text{ m} \end{gathered}\)Thus, the initial compression of the spring is 0.34 m.
An engineer is designing a runway for an airport. Several planes will use the runway and the
engineer must design it so that it is long enough for the largest planes to become airborne before the
runway ends. If the largest plane accelerates at 3.30 m/st and has a takeoff speed of 88.0 m/s, then
what is the minimum allowed length for the runway?
The minimum allowed length for the runway is 1170m.
a=3.30m/s2 is the acceleration of the plane
v=88.0 m/s is the final velocity of the plane
u=0m /s is the initial velocity of the plane
The acceleration of the object is the slope of the v-t graph, therefore,
Slope=Change in y component / Change in the x component
a = u- v / T f - T i
T f - T i = v/a
T f - T i = 88/3.3
T f - T i = 26.67 s
The displacement,
d=1/2 b h
d=1/2(T f - T i ) * v
d = 1/2 * 26.67 s * 88.0 m / s
d = 1173.33
= 1170m nearest three significant figures
Hence, the minimum allowed length for the runway is 1170m answers.
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If a football player hits the ball with a force of 50 N, determine the reaction force.
Answer: 60
Explanation: if u hit it it will have impact and the impact added 10n
Your friend's car is stuck in the snow. You push very hard and become very 1 tired but the car won't move. Did you do work?
Yes, work was done
No, work wasn't done
Answer:
Yes you worked
Explanation:
You may have not seen a good outcome but you did put effort in.
When a force is applied on the car and it doesn't move then it simply means
work wasn't done.
The formula for work is given below:
Work = Force ₓ Displacement
For work to have been done , the applied force must cause the object to
change its position(displacement).
In situations where the force applied doesn't cause a change in position then work can't be calculated. This means no work was done on the car despite the applied force causing him to be tired.
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if the temperature of a given object is doubled (as expressed in kelvin, for example from 300 k to 600k), by what factor will the total radiation (electromagnetic) energy emitted by the object change?
If the temperature becomes double, the total radiant energy becomes 16 times of the initial value
What is stefan Boltzman's law?stefan Boltzman's law. state that According to the Stefan-Boltzmann law, the total radiant heat power emitted by a surface is proportional to the fourth power of its absolute temperature
the total radiant Object energy emitted by is directly Propotional to the fourth Power of its temperature. the
The Stefan-Boltzmann law expresses the power radiated by a black body as a function of temperature. The Stefan-Boltzmann law states that the total energy radiated per unit surface area of a black body across all wavelengths per unit time jstar (also known as the black-body radiant emittance) is directly proportional to the fourth power of the thermodynamic temperature T of the black body.
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You are pulling your friend on a sled with a constant velocity using a rope held horizontally in the snow. Using a spring scale attached to the rope, you measure the tension to be 0.5000 N. The combined mass of the sled and your friend is 64.00 kg. Determine the magnitude of the surface force the ground exerts on the sled.
Answer:
627.2 N
Explanation:
The Normal Force (N) is the force the ground exerts on the sled, which is equal to the weight (W) of the sled. These forces act in the y direction. The other forces, Tension, Applied Force, Force of Friction all act in the x direction.
N = W = mg = (64.0 kg)(9.8 m/s²) = 627.2 N
Question 61 Marks: 1 The amount of color in water should be less thanChoose one answer. a. 5 color units b. 10 color units c. 20 color units d. 15 color units
The amount of color in water should be less than 5 color units. The amount of color in water is measured in color units (CU) and indicates the level of organic material present in the water. The correct answer is a.
The maximum allowable color level in drinking water is typically set by regulatory agencies and may vary depending on the source and treatment process. However, in general, the amount of color in water should be less than 5 color units to ensure that the water is aesthetically pleasing and does not contain excessive amounts of organic material.
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Which object will accelerate less if the
same force is applied to both--an
apple or a couch? Why
If we apply same force to both-an apple or a couch, the object which will accelerate less is couch.
What is acceleration?
Acceleration is the term used to describe the pace at which speed and direction of velocity vary over time. Something is said to be accelerating when it starts to move faster or slower. Even when the speed is constant, motion on a circle accelerates because the direction is always keeps shifting. Both impacts cause all other motions to speed up.
The couch will accelerate less because
F = m a
where, F = force, m = mass, a = acceleration.
This equation can also be written as
a = F/m
It tells us that the acceleration is inversely proportional to mass.
so, in the question given the mass of couch will greater as compared to an apple so the acceleration of the couch will be lesser as compared to apple.
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