Answer:
Velocity = 20.18 m/s
Explanation:
Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.
Mathematically, velocity is given by the equation;
[tex]Velocity = \frac{distance}{time}[/tex]
[tex]V = \frac{d}{t}[/tex]
Given the following data;
Distance, d = 3330m
Time, t = 165 secs
*To find the velocity*
Substituting into the equation, we have;
[tex]V = \frac{3330}{165}[/tex]
Velocity = 20.18 m/s
How is a pitch that is heard when waves are closely spaced together described?
A.the same as when waves are spaced far apart
B.high
C.low
Answer:
The answer is high
Explanation:
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Higher frequency and higher pitch are produced by sounds with shorter wavelengths. So, long waves sound low and short waves sound high.
What are wave properties?Physical characteristics of waves, such as transmission, reflection, polarization, diffraction, and refraction, are examples of wave attributes.
Waves are described mathematically using terms like wavelength, frequency, and amplitude.
Sound and light are two examples of common waves we encounter. Whether you're discussing waves or vibrations.
All of them may be classified according to the following four factors: amplitude, wavelength, frequency, and speed.
According to the graph, pitch perception is influenced by tone strength; below 1000 Hz, pitch tends to decrease with increasing loudness, and beyond 1000 Hz, pitch tends to increase.
Therefore, high pitch that is heard when waves are closely spaced together.
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A plastic rod is rubbed with a piece of wool, and a glass rod is rubbed with a piece of silk. An object is placed near the plastic rod, and an attractive force is detected. How will the object react when near the glass rod?
.A repulsive force will occur
.B.An attractive force will occur
.C.A neutralization will occur
.D.An electric discharge will occur
Answer:
B
Explanation:
An attractive force will occur between the plastic rod and nearby object.
What happen when opposite charged bodies come close together?An object is placed near the plastic rod, and an attractive force is detected then the object react when near the glass rod due to presence of attractive force between them. Attraction occurs between two bodies or objects when there is presence of opposite charges on both objects.
So we can conclude that an attractive force will occur between the plastic rod and nearby object.
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20 POINTS & GIVING BRAINSLET IF ITS CORRECT.
DUE IN LESS THAN 5 MINUTES PLEASE HELP AND EXPLAIN.
sorry for the quality.
Answer:
it is d all of the above your welcome
what is weight training
Answer:
You lift weights and train on a daily basis?
Explanation:
Help please and thank you
Answer:
B.
Explanation:
A. Is a no, because they the person still has a loan to pay and usually banks will not let people take another loan until the last one was paid in full.
B. This is true, if a person misses a month they get charged with warnings, tax, and fees.
C. This is a chose they don't have to spend their savings.
D. It is not the person's responsibility to take another loan unless it's the pay for the last one.
What notecard word is defined: a substance or particles that a wave travel through.
outer space
electromagnetic
medium
mechanical
Answer:
medium
Explanation:
A substance or particle that wave travel through is called medium. There are two main types of such medium, some contains particles and some are vacuums.
Waves can travel through a vacuum which contains no particles. Some can also contain particles. Waves can interact in different ways with the medium.
Calculate the speed for a car that went a distance of 254 km in 4 hours
time. *
s=d/t
63.5 km/h
36.5 km/hr
84.6 km/hr
Answer:
speed = 63.5 km/hr
Explanation:
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Una mujer sale de su casa, camina 650 m al Oeste y luego 500 m al Norte hasta llegar al centro comercial donde va a realizar sus compras. Calcular: a) distancia total recorrida y b) magnitud y dirección de su desplazamiento resultante.
Answer:
Explanation:
De la información dada:
La distancia total recorrida= 650 m + 500 m
La distancia total recorrida= 1150 m
La magnitud se puede calcular utilizando el teorema de Pitágoras.
a² = b² + c²
a² = 500² + 650²
a² = 250000 + 422500
a² = 672500
a = [tex]\sqrt{672500}[/tex]
a = 820 m
La dirección del desplazamiento resultante es la dirección noreste desde el punto de partida.
Which phase changes are endothermic?
Calculate the force needed to bring a 1,019-kg car to rest from a speed of 29 m/s in a distance of 118 m
A quantity that has both direction and magnitude is known as what
Answer:
A vector is a quantity that has both magnitude and direction. DEF: A scalar is a quantity that has magnitude but NO direction.
Explanation:
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A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?(1 point)
18.8 m/s
15.9 m/s
37.5 m/s
22.5 m/
The answers to this test are:
1. What is the maximum speed when the conditions are mass = 450 kg, initial height = 30 m, and the roller coaster car is initially at rest?
24.2 m/s
2. A computational model predicts the maximum height that a roller coaster car can reach when the lowest height of its journey is at ground level, where it has a speed of 20 m/s. Given these conditions, what is the maximum height?
20.4 m
3. A computational model predicts the speed of a roller coaster car at different heights given its speed at the lowest height of its journey, which is at ground level. The speed at the lowest point is 30 m/s. What is the prediction for its speed when it is at a height of 20 m?
22.5 m/s
4. A computational model predicts the maximum potential energy a roller coaster car can have given its mass and its speed at the lowest point of its journey. Its mass is 350 kg, and it speed at a height of 0 m is 25 m/s. What is the prediction for its maximum potential energy?
109,375 J
5. What is the benefit of using simple computational models in a spreadsheet application, like the one used in this course, to predict mechanical energy and related values?
It is easy to calculate new scenarios.
The predicted speed of roller coaster at the given height is 22.5 m/s. Hence, option (d) is correct.
Given data:
The speed of roller coaster at the lowest point is, v = 30 m/s.
The height of coaster is, h = 20 m.
We need to predict the speed at the given height. So for that purpose, we can use the law of conservation of energy. As per the conservation of energy :
Total energy at height of 20 m = Total energy at bottom
PE + KE = PE' + KE'
Here,
PE and KE are the potential and kinetic energies at respective points.
So,
[tex]mgh + \dfrac{1}{2}mv'^{2}=0 + \dfrac{1}{2}mv'^{2}[/tex]
At bottom, the potential energy is zero.
Solving as,
[tex]gh + \dfrac{1}{2}v'^{2}=\dfrac{1}{2}v^{2}\\\\(9.8 \times 20) + \dfrac{1}{2} \times v'^{2}=\dfrac{1}{2} \times 30^{2}\\\\v' = 22.5 \;\rm m/s[/tex]
Thus, we can conclude that the predicted speed of roller coaster at the given height is 22.5 m/s. Hence, option (d) is correct.
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Which sequence does
the energy transformation in an automobile engine.
Answer:
Mechanical
Explanation:
A generator is known to have 30V of potential difference with a charge of 8.5C. What is the energy produced by the generator?
Answer:
255J
Explanation:
Given parameters:
Potential difference = 30V
Charge = 8.5C
Unknown:
Energy produced by the generation = ?
Solution:
The energy produced by the generator can be derived using the expression below;
Energy = qV
q is the quantity of charge
V is the potential difference
Insert the parameters and solve;
Energy = 8.5 x 30 = 255J
I need this in by tomorrow please help-
Name one or more ways the laws of thermodynamics being harnessed or fought against at the power plant you studied. (A dam) This should be at least two full sentences.
Answer:
Two fundamental concepts govern energy as it relates to living organisms: the First Law of Thermodynamics states that total energy in a closed system is neither lost nor gained — it is only transformed. The Second Law of Thermodynamics states that entropy constantly increases in a closed system.
Explanation:
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2.
Wind Energy Is Actually An
Indirect Form Of
magnetic energy
solar energy
nuclear energy
electric energy
When a wave is absorbed by a medium, its energy is transferred to the medium. The energy is most often transformed into thermal energy. What measurement could you make to confirm the transfer and transformation of wave energy?
Answer:
TEMPERATURE
Explanation:
When a wave is absorbed by a material medium, different phenomena occur, but the collisions with the other particles causes the energy to be transformed into internal energy in the atoms and molecules of the material, with TEMPERATURE measurements the increase in the internal energy of the material.
Given that on the moon g = 1.6 m/s2, and on Earth g = 9.8 m/s2, if a car on the moon weighs 3.8 N, what is its mass on Earth?
Weight = m • g
On the moon, 3.8N = m • 1.6 m/s^2
m = 3.8 / 1.6
m = 2.38 kg
Anywhere !
Everywhere !
A example of an energy conversion from kinetic to thermal energy would be....
A. friction
B. television
C.flower
D.gravity
Answer:
I would have to say C, friction
Explanation:
Thermal means heat, and friction causes heat. Good luck!
4.
If you lift a 30 kg weight 0.5 meters. How much Potential energy has it
gained?
Note:- Use g = 10 m/s?
a 150 J
b 60 J
C 180 J
d 100 J
Answer:
150 J
Explanation:
here, m= 30kg
height = 0.5 m
so
potential energy = mgh
= 30×10×0.5= 30×5
= 150 J
An increase in the energy of the wave________the amplitude of the wave.
Answer:
Increases the amplitude of the wave.
pls help me i’m begging u
Answer:
First one: False. Second one: decrease. Third one: decreased
Explanation:
For the first one, potato chips will make the floor more slippery than just regular tile. Second one, if the force holding the 2 things together decreases, the friction will decrease as well. For the third one, if water is over the floor, it makes it even more slippery.
Hope this helps!
Answer:
1:False 2:Decrease 3:Decrease
If a function consumes current velocity (v) and acceleration (a), then the next velocity (next-v) can be calculated.
v + a
v * a
a / delta-t
v + (a * delta-t)
Answer:
v+(a*delta-t)
Explanation:
Answer:
v+(a*delta-t)
Explanation:
3. What factors can contribute to an infant's ability to develop sensory competencies?
Answer:
Explanation:
Here's how to stimulate your baby's senses in age-appropriate ways:
Decorate the nursery with colorful, bold patterns. ...
Play hand games. ...
Use "baby talk." Studies have shown that the sing-song, fluctuating tones mothers use to talk to their babies are important for language development. ...
Hold your baby as much as possible.
A child is sitting on a merry-go-round 2.8 m from the
center. If the tangential velocity of the ride is 0.89 m/s,
what is the centripetal acceleration of the dragonfly?
A. 0.11 m/s2
C. 0.32 m/s2
B. 0.28 m/s2
D. 2.2 m/s2
pls help me pls i’m begging u
Answer: Rolling Friction
Explanation:A rolling ball stops because the surface on which it rolls resists its motion. A rolling ball stops because of friction.
1. Horses with the greatest linear speed on a merry-go-round are located
A) near the center.
B) near the outside.
C) anywhere, because they all move at the same speed.
Max and his friend want to ride in the front car of a roller coaster. What happens to the car's kinetic energy as the roller coaster car is pulled to the top of the first big hill?
A.
Its kinetic energy is released into the air at the top of the hill.
B.
Its kinetic energy is added to the potential energy to give it twice as much speed.
C.
Its kinetic energy is converted to potential energy at the very top of the hill.
D.
Its kinetic energy is transferred to the wheels so it can roll quickly down the hill.
Answer:
KE =1/2mv^2
Explanation:
KE depends upon movement of the body
. Since the man is walking at a constant velocity, he has what acceleration
