Explanation:
No. Centripetal force is a not a force itself, but rather a sum of forces. From Newton's second law:
∑F = ma
∑F = m v²/r
So centripetal force does not get used on a free body diagram.
6. The peak value of an AC sine wave is
120 V. What's the effective value
(rounded)?
A. 65 V
B. 85 V
C. 200 V
D. 140 V
Answer:
B. 85 V
Explanation:
E(rms) = E(peak-to-peak) / squareroot(2)
E(rms) = 120V / 1.414 = 84.9 V
(When rounded) = 85 V
The correct option about peak value and effective value of AC sine wave is, “85 V”.
What are the differentiating factors between peak value and effective value?Peak value is also known as maximum value.Effective value is also known as RMS (Root Mean Square) value.Maximum value attained by Alternating quantity is defined as Peak value.The square root of average of the square of quantity during a complete cycle is defined as Effective Value. How to do the conversion between peak value and effective value?To convert peak value to effective value, divide the peak value by √2 and the result will be the effective value.To convert effective value to peak value, multiply the effective value with √2 and the result will be the peak value.How to solve this question?Peak value = 120 V (Given)
Effective value = Peak value ÷ √2
Effective value = 120 ÷ √2
Effective value = 85 V (approximately)
Thus, we can conclude that by dividing the peak value by √2, we will get effective value and multiplying the effective value with √2 will give peak value as result.
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What is the velocity of a bobsled that travels 100 meters in 8.9 seconds in m/s
Answer:
11.2 m/s
Explanation:
Average velocity = displacement / time
v = 100 m / 8.9 s
v = 11.2 m/s
I am literally so confused on what the question is asking halp :(
Answer: B
Explanation: Distance/Time but if u want it easier its Velocity=Distance/Time or (Final Velocity -Starting Velocity)/Time
A wave is traveling from one medium to another.If the wave is partially transmitted an partially reflected from the boundary,what will happen to the amplitude of the reflected wave?
Answer: the answer is C
Explanation:
Heat always flows from a what place to a what place
Answer:
Heat is always the transfer of energy from an object at a higher temperature to an object at a lower temperature.
Explanation:
Answer:
Heat flows from high temperature to low temperature
Explanation:
the answer also may vary it can also be the heat flows from a warmer to colder place
hope this helped!
What is the mass of an object that has a weight of 80.0 N?
Explanation:
SUPONIENDO QUE LA ACELERACIÓN DE LA GRAVEDAD ES [tex]9.80 m/s^{2}[/tex]
USANDO LA SEGUNDA LEY DE NEWTON:
m = 80.0 N/[tex]9.80 m/s^{2}[/tex] = 8.16 kg
Answer:
8kg
Explanation:
using the formula Force(F)=mass(m)×acceleration(a),
since we are finding the mass of the object,we will make m the subject by dividing both sides by a.
you will now get m= f/a
the acceleration on Earth is usually 10m/s
m= 80/10
m= 8/1 which is also 8kg
If the billing cycle length for a credit card is one calendar month, which of the
following months will result in the greatest periodic interest rate?
O A. December
B. June
C. April
!!!2O D. September
Answer: A.) December
Explanation:
December has the highest number of days in the options given above, with 31 days compared to the others with 30 days within a calendar month. The billing cycle is used to refer to a time interval between the end and the next billing or statement date. In the scenario above, the billing cycle length is monthly, meaning the periodic interest will be paid over a 31 day span time before thre beginning of another cycle.
For example, if periodic interest is $1 per day, this amount totals ($1 × 31) in december compared to the ($1 × 30) Interest in the June, April and September billing cycle.
A golfer is teeing off on a 130.0 m long par 3 hole. The ball leaves with a velocity of 35.0 m/s at 35.0° to the horizontal. Assuming
that she hits the ball on a direct path to the hole, how far from the hole will the ball land (no bounces or rolls)?
Answer:
The ball will land 12.5m before that hole.
Explanation:
The motion of the golf ball can be considered as a projectile motion, where first its height is 0, then it keeps increasing to a maximum point, after which its height starts decreasing again and hits the ground (height becomes 0 again).
We need to calculate the Range (horizontal distance) of the ball which is given as:
[tex]R=\frac{v_i^2{\cdot}sin2\theta}{g}[/tex]
Where
v(i) = initial velocity = 35 m/s
θ = Initial angle = 35°
g = gravitational acceleration = 9.8 m/s
Substitute in the given formula to find Range:
[tex]R=\frac{(35)^2\cdot{sin}(2)(35)}{9.8}\\R=\frac{(1225)(0.94)}{9.8}\\R = 117.5~m[/tex]
Distance between the hole and position where ball lands = 130m - 117.5m = 12.5m
A group of students gather for some fun during their summer break from school. Kendall and Jacoby have a water balloon fight during one of those “lazy” days of summer.
Marie, Gary, and Lois remember a video about work that their science teacher, Ms. Lewis, showed them before they left for vacation.
Marie says: “If Kendall throws a water balloon at Jacoby, there is no work being done. It’s just boys being boys.”
Gary says: “If Kendall throws a water balloon at Jacoby, there is work being done by Jacoby because he has to run.”
Lois says: “If Kendall throws a water balloon at Jacoby, there is work being done because Kendall had to exert a force that made the water balloon travel a certain distance to hit Jacoby.”
Which one of them is correct and why? Answer in complete sentences! You can type on this document and turn in.
Answer:
lois is right because throwing the water balloon is exerting a force running is not
Which situation will the lowest resistance occur
The correct choice is ' C '.
-- Shorter wire has less resistance than longer wire.
-- Thicker wire has less resistance than thinner wire.
-- Colder wire has less resistance than hotter wire.
can someone help m e
Answer:
A.when the distance is very close from the source
Explanation:
Answerwhen the distance is very close from the source
Explanation: A
What is D ?
Its name the wave diagram.
B: Crest
A: Trough
C: wavelength
I think can someone check that. I think D might be amplitude but i don’t know.
Answer:
wave height ( H)
Explanation:
it is the total summation of crest and trough
What is special relativity
Answer:
In physics, special relativity (also known as the special theory of relativity) is the generally accepted and experimentally confirmed physical theory regarding the relationship between space and time.
We need special relativity in order to solve for quantum gravity. ... The earth was expanding (thus, it's mass was expanding) through space in all directions in order to create gravity **OOPS** forgot, specifically at an accelerating rate… OR… The space must be pushing toward or down on the earth, from every direction.
Answer:
The theory of special relativity explains how space and time are linked for objects that are moving at a consistent speed in a straight line. ... The theory of special relativity was developed by Albert Einstein in 1905, and it forms part of the basis of modern physics.
Explanation:
hi:) is question 6 correct?
-- When you see the words "uniform speed", that means the car's speed is not changing.
-- Right under those words in the picture, there's a note to remind you that "uniform speed" also means "acceleration is zero".
-- The whole key to this question is to find out if you remember that acceleration and net force always go together.
.==> If there's net force, then there's acceleration.
.==> If there's acceleration, then there's net force.
.==> If there's NO net force then there's NO acceleration.
.==> If there's no acceleration, then there's no net force.
-- In this picture, there's no acceleration, so there's no net force.
-- The driving force on the car is 2000N forward.
-- But the car's speed is not changing, so the net force on the car must be zero.
-- So that 'resisting' force pulling the car backwards must be 2000N. Then the net force on the car adds up to zero.
-- If the resisting force pulling the car backwards is not zero, then the net force on the car would not be zero, and the car's speed would be changing.
helpp me pleassee....
Answer:
The fundamental wavelength of the vibrating string is 1.7 m.
Explanation:
We have,
Velocity of wave on a guitar string is 344 m/s
Length of the guitar string is 85 cm or 0.85 m
It is required to find the fundamental wavelength of the vibrating string. The fundamental frequency on the string is given by :
[tex]f=\dfrac{v}{2l}\\\\f=\dfrac{344}{2\times 0.85}\\\\f=202.35\ Hz[/tex]
Now fundamental wavelength is :
[tex]\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{344}{202.35}\\\\\lambda=1.7\ m[/tex]
So, the fundamental wavelength of the vibrating string is 1.7 m.
Which term best describes this step of the investigative process?
question
communication of results
peer review
experiment control
Answer:
peer review
Explanation:
The investigative process involves the development and inclusion of the steps involved to find an answer or solution to a specific question. Certain steps are followed in the process. The hypothesis is formulated, tested, and modified during the whole process. peer review involves the suggestions, comments, and interpretation of people in similar fields about the hypothesis. The given extract focuses on the investigative process of peer-reviewing. The review of the scientists from different countries has been asked to give their suggestions and advice on the journal before its publication.
How much blood does the average adult have
Remembering the Battle of Bunker Hill what did general Howe and his troops do
Answer:
General Howe and the British regrouped after losing the hill.
Explanation:
British forces marched to Breed's Hill on 17 June under the order of Major General William Howe. When the British Army marched in waves toward the Americans, Colonel William Prescott issued orders to avoid the fire until British troops came to clear sight in an attempt to protect the dwindling supply of ammunition to the Americans. Many British soldiers have been killed or maimed; the remainder has withdrawn down the hill. In a second wave, the British stormed the hill once again but met with the same fate. So they withdrew again, suffering a large number of casualties. Eventually the British took the hill in the third attempt but at a great cost of casualties.
Curtains over a window are an example of _____. A. transmission B. a medium for light C. how light waves do not require a medium D. a substance that does not transmit a wave
Answer:
C
Explanation:
we know that light doesn't need a medium through which to travel because the speed of light is experimentally constant: independent of the movement of the source or detector or the direction in which it travels.
At which point is the potential energy the greatest? At which point is kinetic energy the greatest?
Answer:
Kinetic energy is greatest at the lowest point of a roller coaster and least at the highest point.
hope it helps you make me as brainlylistPotential energy will be greatest at the points A and G, and kinetic energy will be greatest at the point D.
• The energy possessed by an object due to its motion is termed as the kinetic energy. On the other hand, the energy stored within an object because of its position relative to some zero position is known as the potential energy of the object.
• Kinetic energy is highest when the velocity is the highest, in the case of pendulum, this takes place at the bottom. In the given case, that is, at point D.
• If kinetic energy is highest at point D, then at the same point potential energy will be the lowest.
• Therefore, potential energy would be highest at its highest point on each of the side of its motion where it remains stationary for some time, that is, at point G and A.
Thus, kinetic energy would be highest at point D, and potential energy would be highest at the points A and G.
To know more about:
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The mean diameter of the Earth is 12.76 x 103 km. What is the surface area of the Earth in m2 ?
(A) 4.01 x 107
(B) 5.12 x 1014
(C) 1.09 x 1021
(D) 1.68 x 109
(E) 2.05 x 1015
Answer:
The Answer is B
Explanation:
Hope this Helps :D
The direction of a vector that points somewhere between due north and due
east is measured in
A. centimeters
B. degrees
C. hours
D. miles
Answer: B
Degree
Explanation:
The direction of vectors are always measured in angles starting from the north. That is, in an anticlockwise direction. But the unit of angle is degree. Therefore, the direction of a vector that points somewhere between due north and due east is measured in degree.
Answer:degrees
Explanation:
The acceleration due to gravity on the Moon is less than the acceleration due to gravity on the Earth. Which of the following is true about the mass and weight of an astronaut on the Moon's surface, compared to Earth?
(A) Mass is less, weight is the same.
(B) Mass is the same, weight is less.
(C) Both mass and weight are less.
(D) Both mass and weight are the same.
(E) Mass is more, weight is less.
Answer:
(B) Mass is the same, weight is less.
Explanation:
Just took test
what is the momentum of a bowling ball with mass of 8.9 kg and a speed of 6.0 m / s
Answer:
The momentum of the bowling ball is 53.4 kg-m/s.
Explanation:
We have,
Mass of a bowling ball is 8.9 kg
Speed of the ball is 6 m/s
It is required to find the momentum of the ball. The momentum of an object is given in terms of its mass and speed as :
p = mv
[tex]p=8.9\times 6\\\\p=53.4\ kg-m/s[/tex]
So, the momentum of the bowling ball is 53.4 kg-m/s.
Which of the following describes an electric motor? Check all that apply. A. Is found in many appliances with moving parts, like a vacuum cleaner or a blender B. Uses the interaction between a spinning coil of wire and a magnet C. Can be powered by a hand crack D. Changes mechanical energy to electrical energy
Answer:
i believe a
Explanation:
Please help and show workings.
Effective resistance = 2+1.5 = 3.5 ohms
Current in the circuit = 1.2 A
Lost volts in the battery = 1.8V
Current in one of the 3 ohms resistors = 0.6 A
I hope it helps
Isabela is an astronomer studying stars A and B. Star A is farther away from Isabela and yet when Isabela observes the stars, the stars appear to have the same brightness. Which would be the best explanation for this? The stars have the same luminosity. Star A is more luminous than star B. Star B is more luminous than star A.
Answer: star A is more luminous
Explanation:
Answer:
B. Star A is more luminous than star B.
Explanation:
on edg
please i need detailed explanation
Answer:
2Micro Farahds
Explanation:
Its in the picture.
I Hope it helps.
A student dips a strip of metal into a liquid. Which is evidence that only a physical change has occurred?
Answer:
not sure if this is correct but it is what i know
The metal bends more easily. The metal changes color. The metal gives off light. The metal gives off heat.
Explanation:
Select the smallest value from the choices below. (A) 15 x 10-3 (B) 0.15 x 100 (C) 0.00015 x 103 (D) 150 x 10-3 (E) 0.00000015 x 106
Answer:
E
Explanation:
Plug all of them into a graphing calculator and you will see that the last one is the smallest of them all
Answer:
E
Explanation:
Just use comon sense you will get the answer (No offense)
