Which of the following statements are true?A. The decrease in the amplitude of an oscillation caused by dissipative forces is called damping. B. The increase in amplitude of an oscillation by a driving force is called forced oscillation. C. In a mechanical system, the amplitude of an oscillation diminishes with time unless the lost mechanical energy is replaced. D. An oscillation that is maintained by a driving force is called forced oscillation.
Answers
Statements that are right as regards oscillation are:
A. The decrease in the amplitude of an oscillation caused by dissipative forces is called damping.
B. The increase in amplitude of an oscillation by a driving force is called forced oscillation.
C. In a mechanical system, the amplitude of an oscillation diminishes with time unless the lost mechanical energy is replaced.
D. An oscillation that is maintained by a driving force is called forced oscillation.
- Amplitude can be regarded as magnitude of change that is been experienced by oscillating variable with each oscillation.
- When there is a decrease in the amplitude of an oscillation as a result dissipative forces, then it is regarded as damping.
- When there is increase in amplitude of an oscillation as a result of driving force then it is termed forced oscillation.
Therefore, the options are correct.
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Answer:
right A, B, C, D
Explanation:
They ask which statements are true
A) Right. The decrease in amplitude is due to the dissipation of energy by friction and is called damping
B) Right. In resonant processes the amplitude of the oscillation increases, being a forced oscillation
C) Right. In a system with energy loss, the amplitude must decrease, therefore energy must be supplied to compensate for the loss.
D) Right. It is a resonant process the driving force keeps the oscillation of the system
Related Questions
A rock is thrown vertically upward from some height above the ground. It rises to some maximum height and falls back to the ground. What one of the following statements is true if air resistance is neglected? The acceleration of the rock is zero when it is at the highest point. The speed of the rock is negative while it falls toward the ground. As the rock rises, its acceleration vector points upward. At the highest point the velocity is zero, the acceleration is directed downward. The velocity and acceleration of the rock always point in the same direction.
A neutral metal ball is suspended by a string. A positively charged insulating rod is placed near the ball, which is observed to be attracted to the rod. This is because:____________. a. the ball becomes negatively charged by induction b. the ball becomes positively charged by induction c. the string is not a perfect insulator d. there is a rearrangement of the electrons in the ball e. the number of electrons in the ball is more than the number in the rod
The rms speed of the molecules in 1.3 g of hydrogen gas is 1600 m/s.Part A. What is the total translational kinetic energy of the gas molecules? Part B. What is the thermal energy of the gas? Part C. 500J of work are done to compress the gas while, in the same process, 2000J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules?
Two charged particles attract each other with a force of magnitude F acting on each. If the charge of one is doubled and the distance separating the particles is also doubled, the force acting on each of the two particles has magnitude (a) F/2, (b) F/4, (c) F, (d) 2F, (e) 4F, (f) None of the above.
Answers
Answer:
2.0 amps
Explanation:
Current is the ratio of voltage to resistance:
I = V/R = (3.0)/(1.5) = 2.0
The current in the wire is 2.0 amps.
F = 75 N
7
.
A. 0.67 m/s2
B. 1.50 m/s2
C. 6.70 m/s2
D. 25.0 m/s2
Answers
Answer:
1.50 m/s²
Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
f is the force
m is the mass
From the question we have
We have the final answer as
1.50 m/s²
Hope this helps you
Answers
by angular momentum conservation we will have
angular momentum of child + angular momentum of merry go round = 0
angular momentum of child = mvR
m = mass of child
R = radius of child
v = speed = 2 m/s
now let's say moment of inertia of merry go round is I
so we will have
so merry go round will turn in opposite direction with above speed
1.
the noun that follows the verb and answers the questions
whom or what
linking verb
2. a word that expresses action
sentence
3. who or what the sentence is about
predicate noun
4.
a noun that indicates to or for whom or what something is
done
predicate adjective
5. follows a linking verb and renames the subject
direct object
subject
6. follows a linking verb and describes a subject
verb that joins a subject and a predicate noun or predicate
7.
adjective
indirect object
8. expresses a complete thought
verb
Answers
Answer:
Explanation:
No 1 is linked to the option provided at no 5.
A direct object is the noun that follows the verb and answers the question.
No 2 is linked to the option provided at no 8.
A verb is a word that expresses action.
No 3 is linked to the option provided at no 5.
The subject is what or whom the sentence is about.
No 5 is linked to the option provided at no 3.
A predicate noun follows a linking verb, and renames the subject.
No 6 is linked to the option provided at no 4.
A predicate adjective follows a linking verb, and describes a subject.
No 7 is linked to the option provided at no 1.
A linking verb joins a subject and a predicate.
No 8 is linked to the option provided at no 2.
A sentence expresses a complete thought....
Final answer:
The terms like direct object, verb, subject, indirect object, predicate noun, predicate adjective, and sentence are explained in the context of English grammar and matched to their definitions.
Explanation:
Here are the correct matches for the terms:
- The noun that follows the verb and answers the questions whom or what is typically referred to as the direct object.
- A word that expresses action is a verb.
- Who or what the sentence is about is known as the subject.
- A noun that indicates to or for whom or what something is done is an indirect object.
- Follows a linking verb and renames the subject is a predicate noun.
- Follows a linking verb and describes a subject is a predicate adjective.
- Expresses a complete thought is the definition for a sentence in the context of English grammar.
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Answers
Answer:
Time = 1.61 seconds
Explanation:
Using the equation displacement of a trajectory motion in the y plane
Y = u t sin ů - ½gt²....equation 1 where
Y= vertical displacement =4.1
U = initial velocity = 15m/s
g = acc. Due to gravity = 10m/s
Ů = angle of trajectory = 45
t = time to reach fan on its way down
Sub into equ 1
4.1 = 15t sinů - ½ * 10t²
4.1 = 10.61t - 5t²
Solve using quadratic formula
t =[-B±( -B² -4AC)^½]/2A....equation 2
Where A = 5, B=10.61, C =4.1
Substitute A,B,C into equ2
t = (10.61±5.53)/10
t = 0.508seconds or 1.61seconds
Since it is on its way down t= 1.61 seconds
Answers
Answer:
69.69 g
Explanation:
Evaporation of water will take out latent heat of vaporization. Let the mass of water be m and latent heat of vaporization of water be 2260000 J per kg
Heat taken up by evaporating water
= 2260000 x m J
Heat lost by body
= mass x specific heat of body x drop in temperature
60 x 3500 x .750 ( specific heat of human body is 3.5 kJ/kg.k)
= 157500 J
Heat loss = heat gain
2260000 m= 157500
m = .06969 kg
= 69.69 g
Final answer:
Approximately 78 grams of water would need to evaporate from a 60.0-kg person to lower their body temperature by 0.750ºC. This calculation is based on the principles of thermodynamic heat transfer and the specific body temperature, latent heat of water vaporization, and specific heat capacity of the human body.
Explanation:
To calculate the amount of water mass from an individual's body that would need to evaporate to reduce their body temperature, we can use the principle of thermodynamic heat transfer. The basic equation is Q = mLv, where Q is the heat absorbed or lost, m is the mass, and Lv is the latent heat of vaporization.
In this case, knowing that at body temperature of 37.0°C, the latent heat of water vaporization (Lv) is approximately 2430 kJ/kg, we substitute these numbers. Given our desire to reduce body temperature by 0.750°C in a 60 kg human, we first calculate the amount of heat to dissipate (Q) using Q = mcΔT, where c is the specific heat capacity of the human body (roughly equivalent to that of water, 4.184 kJ/kg°C), m is the mass, and ΔT is the change in temperature.
The calculation is as follows:
Q = (60 kg)(4.184 kJ/kg°C)(0.750°C) = ~189 kJ
Next, we substitute Q into the Q = mLv equation to determine the mass m:
m = Q / Lv = 189 kJ / 2430 kJ/kg = 0.078 kg, or 78 grams
Hence, around 78 grams of water would need to evaporate from a 60.0-kg person to lower their body temperature by 0.750ºC.
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