Answer:
Explanation:
im sorry i coudnty help
What is the mass of a box with a weight of 200 N?
200 kg
20.4 kg
0.05 kg
2000 kg
Answer:
F =mg
200= m ×10
200/10 =m
20kg= m
Which of the following best describes how sound is produced?
A. Vibrating materials generate particles.
B. Vibrating materials generate beams.
C. Vibrating materials generate waves.
D
Vibrating materials generate rays.
Option C best describes how sound is produced. Vibrating materials generate waves ia the reason sound is produced.
What are vibrating materials?Vibrating items produce noise and induce further vibrations. The vibrations of the tuning fork caused the salt to move.
Vibrations produce sound, which is a sort of energy. When an item vibrates, it causes the molecules in the air around it to move.
These molecules collide with nearby molecules, forcing them to vibrate as well. As a result, they collide with more surrounding air molecules.
Vibrating materials generate waves ia the reason sound is produced.
Hence option C best describes how sound is produced.
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NEED HELP ASAP
The distance from the midpoint to the height of a crest is known as the____
1) amplitude
2)crest
3)wavelength
4)frequency
Answer:
Wavelength!
Explanation:
At least I think? Or wavelength might be crest to crest! Sorry if I'm incorrect. Let me know how I did!
The pressure inside a blimp is 506 Pa, if the area is 3,000cm2 then what is the force?
Answer:
151.8 NExplanation:
The force acting on the blimp can be found by using the formula
f = p × ap is the pressure
a is the area
3000 cm² = 0.3 m²
From the question we have
f = 506 × 0.3
We have the final answer as
151.8 NHope this helps you
When a 15.00 kg mass is attached to a vertical spring, the spring is stretched 2.0 m such that the mass is 6.0 m above the table. The spring constant is 400.0N/m? What is the total potential energy associated with this system?
Answer:
idk
Explanation:
idk
With the water trap being used, all the possible sources of error would be eliminated.
True
False
Answer:
True
Explanation:
What is the average power output pf a weight lifter who can lift 250 kg 2.0 m in 2.0 s
Answer:
Power = 2.45Kw or 2450 Watts.
Explanation:
Given the following data;
Mass, m = 250kg
Height, h = 2m
Time, t = 2secs
We know that acceleration due to gravity, g is equal to 9.8m/s²
Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
[tex] Power = \frac {Energy}{time} [/tex]
But Energy = mgh
Substituting into the equation, we have
[tex] Power = \frac {mgh}{time} [/tex]
[tex] Power = \frac {250*9.8*2}{2} [/tex]
[tex] Power = \frac {4900}{2} [/tex]
Power = 2450 Watts
To convert to kilowatt (Kw), we would divide by 1000
Power = 2450/1000
Power = 2.45Kw.
Therefore, the average power output of the weightlifter is 2.45 Kilowatts.
The average power output of the weight lifter who can lift the given mass is 2450 Watts.
Given the data in the question;
Mass; [tex]m = 250kg[/tex]Displacement; [tex]d = 2.0m[/tex]Time taken; [tex]t = 2.0s[/tex]Power is the amount of energy transferred per unit time. It is expressed as:
[tex]P = \frac{W}{\delta t}[/tex]
Where W is work done and t is elapsed time.
So, we find the work done
Work done = Force × Displacement
Since Force = Weight = m × g
Where g is acceleration due to gravity ( [tex]9.8m/s^2[/tex] )
Hence
[tex]Work\ done = mg * d\\\\Work\ done = 250kg\ *\ 9.8m/s^2\ *\ 2.0m\\\\Work\ done = 4900kg.m^2/s^2[/tex]
We substitute our value into the previous equation
[tex]P = \frac{Work\ done}{\delta t}\\\\P = \frac{4900kg.m^2/s^2}{2.0s} \\\\P = 2450kg.m^2/s^3\\\\P = 2450J/s\\\\P = 2450W[/tex]
Therefore, the average power output of the weight lifter who can lift the given mass is 2450 Watts.
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What is the average income of an osteologist? (Anatomy)
Where does the negative charge come from?
negative charge come from the gain of electron
Answer:
An electrical charge is created when electrons are transferred too or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged.
From G00gle
Explanation:
Karina strikes a match to light a candle. Explain what type of reaction the burning match represents in terms of energy.
Answer:
Exothermic
Explanation:
A burning match represents an exothermic reaction. The chemicals release energy in the form of heat and light as the reaction progresses.
Answer:
A burning match represents an exothermic reaction. The chemicals release energy in the form of heat and light as the reaction progresses.
Explanation:
Its the sample response.
Why does the friction force stay the same when the applied force is increasing?
Answer:
When we increase the applied force (push harder), the frictional force will also increase until it reaches a maximum value. When the applied force is larger than the maximum force of static friction the object will move. ... For kinetic friction the value remains the same regardless of the magnitude of the applied force.
You're riding in an elevator as it is reaching the top floor of a building and then leaving the top floor to go down again. During this time:
Select one:
a. Your apparent weight is greater than your weight.
b. Your apparent weight is less than your weight.
c. Your apparent weight is equal to your weight.
Answer:
Your apparent weight would be less since your velocity is changing from positive to negative (using up as positive).
If you were in free fall then your acceleration would equal g and the apparent weight would be zero.
The wavelengths for visible light rays correspond to which of these options?
A.
about the size of a pen
B.
about the size of a virus or a large molecule
C.
about the size of an amoeba
D.
smaller than an atom
E.
about the size of a football field
Answer:
sorry about the other person but its b
Explanation:
Answer:
this is the correct answer
Explanation:
A family drives north for 30km then turns east for 20km. The family then decided to turn west for 5km before finally stopping to take a break. Which of the following is true?
A) the distance driven is more than the displacement.
B) the displacement is more than the distance driven.
C) the distance driven and the displacement are the same.
Answer:
A
Explanation:
They drove 30km north. The displacement adds up to 25km therefore making the distance greater
Hope this helps!
8. A tank shoots a projectile at an angle of 67* above the horizon and at a speed of 53 m/s
toward an enemy tank. How far away will the enemy be located for a direct hit?
I
Answer:
Explanation:
We are tp calculate the range of the projectile. This is expressed as;
R = 2Usin theta/g
Given
U = 53m/s
Theta = 67°
Substitute;
R = 2(53)sin67/9.8
R = 106sin67/9.8
R = 106(0.9205)/9.8
R = 97.57/9.8
R = 9.96m
Hence the enemy is 9.98m located for a direct hit.
One object has a negative charge. The other object has a positive charge.
The objects will _____.
neither repel nor attract each other
repel each other
both repel and attract each other
attract each other
Answer:
attract each other
Explanation:
attract each other, opposite charges attract each other, similar charges repel.
Select all that apply. There MIGHT be more than one.
Earthquakes are concentrated along:
Mid-Atlantic ridge
ocean shorelines
deep ocean trenches
lithosphere plate boundaries
areas of sedimentation
. You are standing at the top of a high cliff. You drop a rock and it hits the ground 4
seconds later. How fast was it going when it hits the ground?
Answer:
V = -39.2m/s
Explanation:
Given the following data
Time, t = 4secs
Since the rock is falling, we know that the initial velocity = 0
Acceleration due to gravity = 9.8m/s²
To find the final velocity, we would use the first equation of motion
V = U + at
Substituting into the equation, we have
V = 0 + (-9.8*4)
V = -39.2m/s
During a demonstration of Newton's laws of motion, a student used the setup shown in Figure 1. The
student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as
shown in Figure 2.
ontage
werdana 10... 19
11162030
TAG Teste
Figure 1
Figure 2
Which of these best explains why the coin feil straight down into the cup instead of remaining on the
index card?
F. The coin was at rest until the card was removed, so it tended to remain in the same location.
Once the card was gone, the unbalanced force of gravity caused the coin to fall.
6. Moving the card applied an action force on the coin. Since the card was gone, gravity applied a
reaction force on the coin.
H. The card had less mass than the coin, so a smaller force of gravity acted on the card. The
larger force of gravity on the coin made it fall.
J. The acceleration of the coin falling into the cup was equal and opposite to the acceleration of
the card.
Answer:
The answer is f
Explanation:
I don't have one
If a rocket engine is started and pushes its fumes at the ground with a force of 30,000N, how much force is the ground exerting on the rocket?
Answer:
watch over the moon and you will get your answer.
Explanation:
if 1.5kg block is pulled across a horizontal surface that has a coefficient of kintic friction of 0.60. if a block is pulled by a 12n force, what is the net force acting on the block
Answer:
3.2N
Explanation:
Given parameters:
Mass of block = 1.5kg
Coefficient of kinetic friction = 0.6
Force of pull on block = 12N
Unknown:
Net force on the block = ?
Solution:
Frictional force is a force that opposes motion:
Net force = Force of pull - Frictional force
Frictional force = umg
u is coefficient of kinetic friction
m is the mass
g is the acceleration due to gravity
Frictional force = 0.6 x 1.5 x 9.8 = 8.8N
Net force = 12N - 8.8N = 3.2N
In order for acceleration to occur, something must be..
Determine the components of reaction at the fixed support
a. the 400 n, 500 n, and 600 n forces are parallel to the x, y, and z axes, respectively
Complete Question
The complete question is shown on the first uploaded image
Answer:
The components of reaction at the fixed support are
[tex]A_{(x)} = 400 \ N[/tex] , [tex]A_{(y)} = -500 \ N[/tex] , [tex]A_{(z)} = 600 \ N[/tex] , [tex]M_x = 1225 \ N\cdot m[/tex] , [tex]M_y = 750 \ N\cdot m[/tex] , [tex]M_z = 0 \ N\cdot m[/tex]
Explanation:
Looking at the diagram uploaded we see that there are two forces acting along the x-axis on the fixed support
These force are 400 N and [tex]A_{(x)}[/tex] [ i.e the reactive force of 400 N ]
Hence the sum of forces along the x axis is mathematically represented as
[tex]A_{(x)} - 400 = 0[/tex]
=> [tex]A_{(x)} = 400 \ N[/tex]
Looking at the diagram uploaded we see that there are two forces acting along the y-axis on the fixed support
These force are 500 N and [tex]A_{(y)}[/tex] [ i.e the force acting along the same direction with 500 N ]
Hence the sum of forces along the x axis is mathematically represented as
[tex]A_{(y)} + 500 = 0[/tex]
=> [tex]A_{(y)} = -500 \ N[/tex]
Looking at the diagram uploaded we see that there are two forces acting along the z-axis on the fixed support
These force are 600 N and [tex]A_{(z)}[/tex] [ i.e the reactive force of 600 N ]
Hence the sum of forces along the x axis is mathematically represented as
[tex]A_{(z)} - 600 = 0[/tex]
=> [tex]A_{(z)} = 600 \ N[/tex]
Generally taking moment about A along the x-axis we have that
[tex]\sum M_x = M_x - 500 (0.75 + 0.5) + 600 ( 1 ) = 0[/tex]
=> [tex]M_x = 1225 \ N\cdot m[/tex]
Generally taking moment about A along the y-axis we have that
[tex]\sum M_y = M_y - 400 (0.75 ) + 600 ( 0.75 ) = 0[/tex]
=> [tex]M_y = 750 \ N\cdot m[/tex]
Generally taking moment about A along the z-axis we have that
[tex]\sum M_z = M_z = 0[/tex]
=> [tex]M_z = 0 \ N\cdot m[/tex]
A swimmer starting from rest has a final velocity of 2.0 m/s after 20 seconds. What is her average acceleration?
A. 0.10 m/s2
B. 22 m/s2
C. 18 m/s2
OD. 40 m/s2
Answer:
0d.40m/s2
Explanation:
because it said what is the average of the acceleration so i said it will be d
A swimmer starting from rest has a final velocity of 2.0 m/s after 20 seconds, her average acceleration .1 m/sec².
What is acceleration?The rate at which an item changes its velocity is known as acceleration, a vector quantity. If an object's velocity is changing, it is acceleration.The net acceleration that objects get as a result of the combined action of gravity and centrifugal force is known as the Earth's gravity, or g. It is a vector quantity whose strength or magnitude is determined by the norm and whose direction correlates with a plumb bob.
Given a swimmer starting from rest has a final velocity of 2.0 m/s after 20 seconds acceleration of the girl = 2.0/20 = 0.1 m/sec²
A swimmer starting from rest has a final velocity of 2.0 m/s after 20 seconds, her average acceleration 0.1 m/sec².
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URGENT: Two horizontal forces act on an object on a surface. There is a 20 Newton applied force to the left and a sliding frictional force of 5 Newtons to the right.
What is the net force on the object?
Answer:
xbzcfhkuvy
Explanation:
dvdvxvdzdx
Mary Jo went on riding her horse through the trails. Her pace was 8 km/hr. She left at 8:30 am and got back to the barn at 9:00 am. How far did she go?
16 m/s
4 m/s
4 km
16 km
Nutrition is a common topic in the media, whether it’s a new diet plan or a new “superfood” on the market to benefit our health. Some of these products are scientifically sound, while others aren’t. How do we tell the difference?
Answer: Plato
Explanation: To find out whether a product is scientifically sound, check the FDA standards for the product. Another option is to ask a medical expert, such as a doctor or a nutrition scientist, whether the product is scientifically sound.
hope this helps
We can check the superfood or diet plan whether it is complying FDA standard or not. Another way is to send it to lab for testing which will gives information about the nutrient content used and its benefits as well as effects.
What is FDA standards?FDA is Food and Drug Administration that coordinates the evaluation, development, maintenance, and adoption of health and regulatory data standards to ensure that common data standards are used throughout the agency.
What is superfood?Superfood is a marketing term for food claimed to confer health benefits resulting from an exceptional nutrient density.
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How much energy must be absorbed by water with a mass of 0.5 kg in order to raise the temperature from 30°C to 65°C? Note: Water has a specific heat of 4,190 J/kg °C
Answer:
Q = 73325 J or 73.325 KJ
Explanation:
According to specific heat capacity, 73,325 J of energy must be absorbed by water with a mass of 0.5 kg in order to raise the temperature from 30°C to 65°C.
What is specific heat capacity?Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.
It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.
It is given by the formula ,
Q=mcΔT
In the given example, substitution in above formula gives,Q=0.5×4190×35=73,325 J.
Thus, 73,325 joules of energy must be absorbed by water with a mass of 0.5 kg .
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Consider a train car being pulled along a track by the engine. What are four forces acting on the train car?
Answer:
kinetic & potential
Explanation: whats the other 2 tho?
How much time does it take a trucker to deliver his shipment 480 km away travelling at an average speed of 120 km/hr?
Answer: time=4 hours
Explanation:
formula:
speed = [tex]\frac{distance}{time}[/tex]
time = [tex]\frac{distance}{speed}[/tex]
time= x
speed = 120km/hr
distance = 480 km
x = [tex]\frac{480 km}{120km/hr\\}[/tex]
=[tex]\frac{48km*hr}{12km}[/tex]
cut the zeros
and remove the signs
then
[tex]\frac{48}{12}[/tex] = 4
therefore, time taken to deliver the shipment by trucker is 4 hours
