Answer:
a. 4 m/s b. 0.2 V
Explanation:
a. Find the flow rate through a 3.00-cm-diameter pipe if the Hall voltage is 60.0 mV.
The hall voltage V = vBd where v = flow-rate, B = magnetic field strength = 0.500 T and d = diameter of pipe = 3.00 cm = 0.03 m
Since V = vBd
v = V/Bd given that V = 60.0 mV = 0.060 V, substituting the values of the other variables, we have
v = 0.060 V/(0.500 T × 0.03 m)
v = 0.060 V/(0.015 Tm)
v = 4 m/s
b. What would the Hall voltage be for the same flow rate through a 10.0-cm-diameter pipe with the same field applied?
Since the hall voltage, V = vBd and v = flow-rate = 4 m/s, B = magnetic field strength = 0.500 T and d' = diameter of pipe = 10.0 cm = 0.10 m
Substituting the variables into the equation, we have
V = vBd
V = 4 m/s × 0.500 T × 0.10 m
V = 0.2 V
A 23cm hammer is used to pull a nail. If 42.5 N of force is applied to it at a 45° angle, how much torque is applied?
Answer:6.91 Nm
Explanation:
The strength of an electromagnet CANNOT be increased by?
Answer:
reversing the current
Explanation:
2. The motion of roller coasters depends upon the conversion of potential
and kinetic energy. A 200 kg car starts from rest at the top of a hill with a
height of 30 m.
Which of the following is this car's kinetic energy at the bottom of the hill?
Answer:
58,800 Joules
Explanation:
I used the formula for Potential energy which is PE = mgh
200 kg x 9.8 m/s^2 x 30 m = 58,800 J
At the very tops of the rollercoaster is maximum PE which is 58,800 J and 0 J of KE, but at the very bottom is maximum KE (kinetic energy) which is 58,800 Joules but 0 J of PE. This is because energy can not be destroyed ONLY converted
A pendulum is swinging. It swings 85 complete swings and this takes 102 seconfs. What is the frequency? A. 0.83 Hz B.17Hz C.187 Hz D.1.2 Hz
Answer:
A: 0.83 Hz
Explanation:
Frequency can be calculated in a multitude of ways. The one way that is going to help you solve this problem is (# of times/seconds)
so you would divide 85 swings/102 seconds
= 5/6 or 0.8333 Hz
so your answer is A
A 0.17 kg ball on a 0.70 m string rotates in a circular path in a vertical plane. If the angular speed of the ball at the bottom of the circle is 7.0 rad/s, what is the force that maintains circular motion?
A. 5.6 N
B. 7.5 N
C. 1.7 N
D. 1.2 N
Suppose the coefficient of static friction is 0.55 rather than 0.61. is the weight of the pail and sand necessary to start the pumpkin moving in this case greater than, less than or equal to 11 N? calculate the required weight.
The weight of the pail and sand necessary to start the pumpkin moving in this case is less than 11 N.
What is the force of friction acting the pumpkin?The force of friction acting on the pumpkin depends on the weight of the pumpkin and the coefficient of static friction.
F = μW
where;
μ is the coefficient of static frictionW is the weight of the pumpkinThe weight of the pumpkin is calculated as follows;
W = mg
where;
m is the mass of the pumpkin = 1.8 kgg is acceleration due to gravityW = 1.8 kg x 9.8 m/s²
W = 17.64 N
The static friction force preventing the pumpkin from moving is calculated as follows;
F = μW
F = 0.55 x 17.64 N
F = 9.7 N
Thus, the minimum force required to move the pumpkin is 9.7 N which is less than 11 N.
Learn more about static friction force here: https://brainly.com/question/13680415
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The complete question is blow:
Suppose the coefficient of static friction is 0.55 rather than 0.61. is the weight of the pail and sand necessary to start the pumpkin moving in this case greater than, less than or equal to 11 N? calculate the required weight. mass of the pumpkin is 1.8 kg.
Simple explanation of string theory, please don’t plagiarize.
Solve for x in the diagram below.
(4.2 + 50°
150
T =
Answer:
x = 25
Explanation:
Find the diagram attached
From the diagram,
4x + 50 = 150 (vertically opposite angle)
4x = 150 - 50
4x = 100
x = 100/4
x =25
Hence the value of x is 25
Longitudinal waves
Transverse waves
Answer:
In a transverse wave, the particles are displayed perpendicular to the direction the wave travels . in a longitudinal wave the particles are are displayed parallel to the direction the wave travels. an example of longitudinal waves in compressions moving along a slinky.
At which location does a skateboarder have the most kinetic energy at least potential energy?
Answer:The skater has the lowest amount of kinetic energy at the top of the track and lowest potential energy at the lowest point of the track. Kinetic energy is the speed a object is going, and potential energy is the energy a object has when its not moving. While the skater moves up the ramp the potential energy increases, and the kinetic energy decreases because it slows down while moving up the ramp. Hope this helps have a nice day ❤️
Explanation:
First recognize that the total energy of the skater is conserved: this means that the total energy of the skater is constant. The total energy (E) consists of the kinetic energy (KE) and gravitational potential energy (Ug).
E=KE+Ug
Now we know that the gravitational potential energy depends on the distance from the zero of potential (or in simpler terms: how high the skater is from the ground). Now, we are ready to answer the question.
The skater possesses the most KE at point B: remember total energy is a constant and at point B the skater has the least amount of potential energy (since they are at their lowest point above the ground). This means that the skater must have more kinetic energy at point B.
Similarly, at points A and C, the skater possesses the most potential energy since they are at their highest point above the ground.
As the skateboarder moves then it will have the maximum kinetic energy at the lower most portion of the track and will have the zero potential energy at the same point and at the maximum height of the track the skater will have maximum potential energy and zero kinetic energy.
What will be the KE and PE of the skater at maximum and minimum positions of the track?As the skater moves on the track his kinetic and potential energy converts into each other but the total energy remains constant.
Total Energy = KE+PE
At maximum height the kinetic energy will totally convert into the potential energy and becomes zero.and the potential energy becomes maximum at this point.
At Max height (Total energy=Max Potential energy) KE=0
Similarly at the lower most portion of the track the Potential energy completely convert into the kinetic energy and becomes zero. And kinetic energy becomes max at this point.
At lower point (Total energy= Max Kinetic Energy) PE=0
Thus the skater will have the most kinetic energy at the lower most point of the track and least potential energy at the same point.
To know more about energy follow
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1. A Zambeef delivery track travels 18 km north, 10 km east, and 16 km south. What is its final displacement from the origin?
Answer:
10.2 km
Explanation:
Displacement is the shortest distance from your original position after movement.
Now, the Zambeef delivery truck moves 18 km north and then 10 km east and then 16 km south.
This means that vertically the truck is 2km short of the 18 km he travelled north..
So we can find the displacement using pythagoras theorem..
Let d be the distance from the current position to the initial position.
Thus;
d² = 2² + 10²
d² = 4 + 100
d = √104
d ≈ 10.2 km
I have attached a diagram showing the direction of this displacement
HELP PLZ I will give you 10 points
An electric field of 3 × 1016 Newtons over Coulombs. is needed to create a spark in the air. If the charged particles in the field are separated by a distance of 1 mm, how many coulombs of charge are needed for a spark? (Round to the nearest whole number.)
Answer:
3
Explanation:
edge 2021
Answer:
3 is correct
Explanation:
While hammering a nail, you put in 30 Joules of work. The hammer then puts out 10 J of
work on the nail. What is that hammer's efficiency?
A. 300%
B. 40%
С. 33%
D. 33 J
Answer:
C Don't worry if you thought it was D. I almost answered that.
Explanation:
Remark
You can get this just by learning the vocabulary.
Efficiency = Work Out / Work In * 100%
Work in = 30J That's you swinging the hammer.
Work out = 10 J That's how much of the hammer's work gets to the nail.
Efficiency = (10/30)*100
Efficiency = 1/3 * 100
Efficiency = 33%
Answer:
I think its 40%, pls correct me if I am wrong :(
Explanation:
Gravitational potential energy is
O the energy that an object has when it is at a
certain elevation, h
the energy of an object at rest
O the energy that an object has because it is in
motion
The cnone of the above
In some areas, hydroelectric power is not geographically appropriate and a different renewable energy source would be a better option. A conservation group is looking for renewable energy sources other than hydroelectric energy that could be used to generate electricity in grassland ecosystems, such as in the midwestern United States or in a savanna in Africa.
Required:
a. Propose a different renewable resource to use that would be a realistic solution to generating electricity without using fossil fuels or hydroelectric power in a grassland ecosystem.
b. Justify the solution proposed above by explaining a potential advantage of using a different renewable resource to generate electricity.
Answer:
a) wind power system, turbines powered, solar power system
b) the possibility of creating jobs for the local workforce and of maintaining the environment without damaging it.
Explanation:
In a grassland system it may not have great changes in height or mountain system where it is easy to represent a river, therefore a hydroelectric power system is not very feasible.
a) You can have several alternative energy systems.
* If there is a fairly constant air current, a wind power system could be implemented.
* If there is a river with an acceptable flow, a generation system can be implemented with turbines powered by the river flow.
* Another system is a solar power system
b) To select any of the possible systems proposed, the current and future energy requirements of the region must be analyzed.
The amount of energy that each proposal can supply
Analyze the installation costs and the economic benefits of a given system.
Study the possible problems for the maintenance of each system.
A great advantage of these systems is the possibility of creating jobs for the local workforce and of maintaining the environment without damaging it.
The most plausible renewable energy source in a grassland is wind energy.
Renewable energy refers to energy that is obtained from wind, water biomass or underground heat. All of these sources of energy are inexhaustible and hold great prospect to solving the current energy deficit is many parts of the world.
In grasslands, the most plausible renewable source of energy is wind. Winds are abundant in grasslands . It is more plausible than hydroelectric power because it does not create any adverse environmental impact. It is the cleanest energy source.
Learn more about renewable energy: https://brainly.com/question/4038933
When conducting research,
are unintentional factors that creep into your experiment and have the potential to affect or even spoil your results.
a. confounding variables
b. replication digits
c. extrapolating factors
d. independent variables
Answer:
a. confounding variables.
Explanation:
An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).
This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.
In an experiment , the variable being manipulated by an experimenter is known as an independent variable while the dependent variable is the event expected to change when the independent variable is manipulated.
A confounding variable can be defined as a variable that generally influences both the independent and dependent variable in an experiment or research study. Thus, it creates an association between the two variables in an experiment.
Hence, when conducting research, confounding variables are unintentional factors that creep into your experiment and have the potential to affect or even spoil your results.
How are particles behaving in solid vs gas when it comes to sound?
Answer:
Sound waves have to travel through solids, gases, and liquids. Sound waves vibrate through the air in matter. Molecules in solids are packed tightly. This allows sound to travel faster through a solid than gas.
Weight is the amount of matter in an object.
True or False
Answer:
False
Explanation:
The mass of an object is normally known as the weight of the object. but mass is the amount of matter in the object. Weight is the force exerted on an object by gravity
Answer: False
Explanation: mass is the amount of matter in an object
Why do other stars look much dimmer than the sun?
What happens when weathering and erosion work together?
A. New mountains are created
B. The climate changes overnight
C. Metal objects become rusty
D. They change the earths surface
Plssss help
Answer:
A. New mountains are created
magnetic induction cannot be done in a wood why
Answer:
Magnetic induction cannot be done in a wood because it is not a magnetic person like iron , nickel,and cobalt
A ray diagram is shown.
A flower is an object in front of a convex mirror. A ray parallel to the principal axis reflects away from the focal point. The second ray goes to the mirror toward the focal point and reflects parallel to the principal axis. The reflected rays are continued onto the other side of the mirror as dashed lines. At the intersection of the two dashed lines is a small upright image of the object in front of the focal point.
Which describes the image?
It is virtual and in front of the mirror.
It is virtual and behind the mirror.
It is real and in front of the mirror.
It is real and behind the mirror.
Answer:
B. Its virtual and behind the mirror.
Explanation:
Answer: (B) Virutal, (D) Upright, (E) Smaller.
Explanation:
Edge Physics B
convertion of unit 8.28x10^-2ft m
Answer:
yes
Explanation:
no
How many atoms are represented by the formula CaF2? A. Four B. Five C. Two D. Three
Answer:
C?
Explanation:
There's 2 different atoms, Ca and F. Unless it's counting the whole thing... then three? (Ca + 2 F atoms)
What are three common fossil fuels?
A. coal, oil, natural gas
B. iron, lead, carbon
C. coal, gold, silver
D. solar, wind, water
Answer:
A. coal, oil, natural gas
Explanation:
this is because those three are related to fossil fuels.
Answer:
A:Coal,Oil,Natural gas
Explanation:
that pfp tho
BRAINLEST FOR CORRECT ANSWER
Which has more momentum: a 3 kg sledgehammer swung at 1.5 m/s OR a 4 kg sledgehammer swung at 0.9 m/s? SHOW YOUR WORK FOR BRAINLEST
Answer:
3kg sledgehammer swung at 1.5 m/s
Explanation:
Small Sledgehammer:
Mass:3.0
Velocity:1.5
MASS×VELOCITY=MOMENTUM
3.0×1.5= 4.5 (momentum)
Large Sledgehammer:
Mass:4.0
Velocity:0.9
4.0×0.9=3.6 (momentum)
higher momentum is the smaller Sledgehammer.
an
N
What is the sum & in Unit
Vector of the 2
& Vectors
a=4. oi + 3.0j and
vector b=- 13.oi +7.0j What are thee
magnitude and direction of a+bالا
Explanation:
Given that,
Vector a = 4i+3j
Vector b = -13i+7j
We need to find the magnitude and direction of (a+b). So,
(a+b) = (4i+3j) + (-13i+7j)
= (4i-13i)+(3j+7j)
= -9i+10j
Magnitude of (a+b).
[tex]|a+b|=\sqrt{(-9)^2+10^2} \\\\=13.45[/tex]
Direction of (a+b),
[tex]\tan\theta=\dfrac{10}{-9}\\\\\theta=\tan^{-1}(\dfrac{-10}{9})\\\\\theta=-48.01^{\circ}[/tex]
Hence, this is the required solution.
HELP ME PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
further from I didn't know the answer
Answer:
it might be b, good luck
Explanation:
not too sure
https://photos.app.goo.gl/wAXjG9NxWP2Wb55YA
17. The four points built into the camera to ensure that each exposure can be oriented
to the camera calibration are called?
A.
Nodal points
B.
Focal points
C. Focus
D. Fiducial marks
E. None of the above
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