Answer:The work per unit of charge required to move a charge from a reference point to a specified point, measured in joules per coulomb or volts
Explanation:
Answer: electric Potential Energy. Potential energy can be defined as the capacity for doing work which arises from position or configuration. In the electrical case, a charge will exert a force on any other charge and potential energy arises from any collection of charges.
Why can't all people use the exact same corrective glasses to help them
see?
A) The lenses in people's eyes can reflect light by different amounts.
B) The retinas in people's eyes can reflect light by different amounts.
C) The lenses in people's eyes can refract light by different amounts.
D) The retinas in people's eyes can refract light by different amounts.
Answer:
a
Explanation:
The formation of a product in the reaction is based on what
Answer:
c
Explanation:
there is formation of products when t reactants react or collied
Use the following to answer question 46
I . increase the current
II. use a stronger magnet
III. use thicker wire
IV. reverse the battery
V. add more coils of wire inside the magnet
46. To increase the force with which the wire is pushed when the switch is closed, which of
the following things could be done?
a. I and II only
b. II, III, and IV only
C. II and IV only
d. I, II and V only
47. A group of students had built a homemade motor and were in the process of trying to
test it. When they hooked it up to their battery they found that the wires in their coil got hot, but the coil would not turn. Of the following solutions, which would be their best
course of action to make the motor spin?
a. add more wire to the coil
b. use a stronger magnet
C. use a higher voltage battery
d. plug into an AC source
Answer:
46.) A
47.) A
Explanation:
46.) To increase the force with which the wire is pushed when the switch is closed, the current flowing through the wire should be increased and the stronger magnet should be used.
Remember that
F = BIL
The force is directly proportional to magnetic field B and current I
a. I and II only
47.) Since the wires in their coil got hot, and the coil would not turn, this is overheating which may be as a result of to much voltage supply compare to the length of the length of the coil of wire. To correct this, more wire should be added to the coil.
What best describes the act of using senses or tools to gather information
Question 1
A 10 N block is at the bottom of a frictionless incline as shown to the right. How much work must be done against gravity to move it to the top of the incline?
A)600j
B)1000j
C)4800j
D)800j
Answer:
W = 600 J
Explanation:
We have,
According to attached figure,
Height of the inclined plane is 60 m
Force acting on the block is 10 N
It is required to find the work must be done against gravity to move it to the top of the incline. The work done is given by :
W = mgh
or
[tex]W=F\times h\\\\W=10\times 60\\\\W=600\ J[/tex]
So, the work done against the gravity is 600 J.
Vector quantities include what 3 things?
Explanation:
I think ur answer is:
Examples of vector quantities include displacement, velocity, position, force, and torque.
Hope this helps..
Good Luck
Can someone help me??
A car travels 1026 km in 6 hours. Find its average speed.
Answer:
171
Explanation:
To work out average speed, you have to do distance divide by time.
1026 divide by 6= 171
I hope that helped you.
In which direction does a buoyant force act on an object?
O A. Up
O B. Opposite to its motion
O C. Right or left
O D. Down
Answer: I THINK the answer is A - Up.
Explanation: The buoyancy force always points upwards because of the pressure of a fluid increases. If the buoyant force is less than the object's weight, the object will sink. You can calculate the buoyant force on an object by adding up the forces exerted on all of an object's sides.
Spaceship 1 and Spaceship 2 have equal masses of 300kg. They collide. Spaceship 1's final speed is 3 m/s, and Spaceship 2's final speed is 2 m/s in the same direction. What is their combined momentum? A. 600 kg-m/s B. 1,500 kg-m/s C. 1,200 kg-m/s D. 900 kg-m/s
Answer:
B. 1500 kg*m/s
Explanation:
Momentum p = m* v
In any type of collision, the total momentum is preserved!
The total momentum before and the total momentum after the collision is the same. We know the mass and speed after the collision so we can calculate the total momentum.
p1 + p2 =
m1*v1 + m2*v2
m1 = me = 300 kg
v1 = 3 m/s
v2 = 2 m/s
Substitute the given numbers:
300*3 + 300+2
900 + 600
1500 kg*m/s, which is answer B.
If the weight of a submerged object is equal to the buoyant force, what net force acts upon the object?
A.) none
B.) upward
C.) sideways
D.) downward
Answer:
A
Explanation:
The weight is acting downwards where as the buoyant force acting upwards (opposite) direction with equal amount of force. so the opposite forces cancel out each other (because of the force amount being equal) and no net force is acting on the object.
Hope i have helped you
Thanks.
Answer:A.) none
No net force acts on the object, it will neither rise nor sink.
Explanation:
A wave has a wavelength of 15 m and a frequency of 10 Hz. What is the speed of this wave?
Given the values of wavelength and frequency of the wave, the speed at which it was travelling is 150ms⁻¹.
What is Wavelength?Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.
Expression from the wavelength, frequency and speed relation;
λ = v ÷ f
Where λ is wavelength, v is velocity/speed and f is frequency.
Given the data in the question;
Wavelength of wave λ = 15mFrequency f = 10Hz = 10s⁻¹Speed of wave v = ?We substitute our values into the above expression.
λ = v ÷ f
15m = v ÷ 10s⁻¹
v = 15m × 10s⁻¹
v = 150ms⁻¹
Given the values of wavelength and frequency of the wave, the speed at which it was travelling is 150ms⁻¹.
Learn more about Speed, Frequency and Wavelength here: brainly.com/question/27120701
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Calculating the Volume of a Cone
Try it
Calculate the volume of the cone.
What is the volume of a cone with a height of 27 cm
and a radius of 13 cm? Round your answer to the
nearest tenth.
VE
cm)
27 cm
113 cm
Answer:
4778.4 cm³
Explanation:
Which statement correctly describes the differences between positive and negative acceleration?
Positive acceleration describes a change in speed; negative acceleration describes no change in speed.
Positive acceleration describes no change in speed; negative acceleration describes a change in speed.
Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.
Answer:
C
Explanation:
Positive acceleration describes an increase in speed ; negative acceleration describes a decrease in speed.
PLEASE HELP ME IN THIS QUESTION!!!
Answer:
Acceleration is 8.45 and the tension is 2.775
Explanation:
Lets apply the equation F=ma for vertical block,
5-T= 0.5a
foe the frictional force acting on the object,
f=0.11×5 (consider equation no.1)
=0.55N
Applying F=ma for the block which is on surface,
T-0.55=0.5a (consider as equation no.2)
no.1=no.2
5.55=2T
T=2.775
by equation no.1,
4.225=0.5a
a=8.45
Which letter on the diagram below represents the retina of the eye? A) A B) B C) C D) D
Answer:
THE ANSWER IS OPTION C.
Question 14 of 30
1 Point
Which of the following ideas was proposed by the ancient Greeks about 2500
years ago?
O A. Atoms consist of positive and negative charges.
O B. Atoms are indivisible units of matter.
OC. All atoms are alike.
O D. Atoms are composed of protons, neutrons, and electrons.
SUBMIT
Answer: a.
Explanation: i have done this before .. hope this helps (⌐■_■)
Answer:
B
Explanation:
HACE 2500 AÑOS NO SE CONOCÍAN LAS CARGAS ATÓMICAS.
Calculate the amount of work for a car that exerts 10N and travels a distance of 5 meters.
Answer:
50 j
Explanation:
W=Force*distance
W=10N*5M
W=50 NM
n*m = joules so you can say 50joules
Neutrons do not enter into any ordinary electrical activity
Answer:
Neutrons are the particles which are present in the nucleus of an atom. These have a neutral charge, means that the don't have a positive charge like proton or a negative charge like an electron, but these are far more dense than electrons and protons. Under normal reaction, neutron may seem to just exist, as usually electrons are the particles which forms bonds or breaks them.
However, Neutrons play an important role in the weight and Radioactive properties of a material. During radioactive decay, which occurs in radioactive elements, the nucleus of an atom breaks down and releases energy and matter, which is primarily due to the knocking out of a neutron. These knocked out neutrons forms the basis of the nuclear fission and fusion reactions.
List the 2 advantages and 2 disadvantages of wind as a source of electricity.
Answer:
The first 2 advantages of wind a source of electricity is that it provides you wifi and wind. 2 disadvantages of wind as a source of electricity is that to much wind could knock it down or slow down the source of the electricity.
Explanation:
I know this because i read a article on it.
What is the independent variable?
And what is the dependent variable for this experiment
Answer:
Independent variable - temperature
Dependent variable - tablet dissolving affect.
Explanation:
The Independent variable in an experiment is characterized as the variable in the experiment that is not affected by a change in any other variable or factor. It could be changed or manipulated to observe its impact on the dependent variable. While a dependent variable is the one that is affected by any change in the independent variable.
In the given experiment, the 'temperature' is the independent variable as it can be controlled or manipulated to observe the effect in the dependent variable. The 'tablet dissolving effect' would be the dependent variable as it is directly affected by any change in the independent variable(the higher the temperature, the easier the tablet gets dissolved).
Which of the following is not true about centripetal force? Check all that
apply.
A. It's the same as centrifugal force.
B. It's also called an inward force.
C. Centripetal force keeps a car on the road going around a curve.
D. Without centripetal force, an object would continue in a straight
line.
E. Centripetal force is the same as gravity.
multiple answer question
Answer:
A, B Y E
Explanation:
The following is not true about Centripetal Force.
It's the same as centrifugal forceCentripetal force is the same as gravityWhat is Centripetal Force?Centripetal Force is the force that makes a body to move in a curved path. The direction of the force to the motion of the body is orthogonal and it is inward towards the fixed point of the center of rotation.
Therefore, following is not true about Centripetal Force.
It's the same as centrifugal force.Centripetal force is the same as gravity.Learn more about Centripetal Force from the link below.
https://brainly.com/question/20905151
If you had started with a larger mass, how would the half-life change?
A) It would increase.
B) It would decrease.
C) It would remain the same.
Answer:
There is no change, unless your mass is somehow at the quantum level, at which the concept of half-life breaks down.
Half life is a property of the specific radioactive isotope...NOT of the initial sample's mass.
If you had started with a larger mass, the half-life would remain the same. So, option C.
What is meant by half-life of an element ?The amount of time it takes for a radioactive element to decay to half of its original value is known as the half-life of the element.
Here,
Half-life is the interval of time needed for half of a radioactive sample's atomic nuclei to spontaneously decay (transform into different nuclear species while simultaneously emitting particles and energy), or, more precisely, the period of time needed for the material's radioactive disintegrations per second to decrease by half.
The phenomenon of radioactive decay is based on the element itself, not the quantity or mass of the element.
Therefore, the change in mass has no significant effect on the half-life of the element undergoing radioactive decay.
Hence,
If you had started with a larger mass, the half-life would remain the same. So, option C.
To learn more about half-life, click:
https://brainly.com/question/16387602
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Why would physics be used to study the movement of ocean waves?
A. Ocean waves are interesting.
B. Ocean waves are useful.
C. Ocean waves are made of matter.
D. Ocean waves are on Earth.
How do scientists look for black holes in space? Describe what a black hole looks like using one of the different ways of seeing the sky?
Answer:
Scientists can't directly observe black holes with telescopes however we can infer the presence of black holes and study them by detecting their effect on other matter nearby. Scientists look for black holes by using x-rays, visible light and radio waves. By a black hole, the sky looks normal then the stars closer to the black holes look like they are spinning around the black hole.
Jack travelled 360 km at an average speed of 80 km/h. Elaine
took 1.5 hours more to complete the same amount of distance.
What was Elaine's average speed for the whole journey?
km/h
Answer:
Average speed of Elain = 60 km/h
Explanation:
Total Distance covered by Jack = 360km
Average Speed of Jack = 80 km/h
Time taken by Jack to complete his journey = Distance / Average speed = 360 km / 80 km/h
Time taken by Jack to complete his journey = 4.5 hours
As it is given the both Jack and Elain travelled the same amount of distance:
Total distance travelled by Elain = 360 km
It is given that Elain took 1.5 hourse more than Jack to cover the distance, so Time taken by Elain to cover the distance is = 4.5 hours + 1.5 hours = 6 hours
Average speed of Elain = Distance/ time = 360 km / 6 hours
Average speed of Elain = 60 km/h
Which data set has the largest standard deviation?
A. 20, 21, 23, 19, 19, 20, 20
OB. 1.6,3, 15, 4, 12, 8
O C. 3.4.3.4.3.4.3
O D. 12. 14, 13, 14, 12, 13, 12
Answer: B
Explanation:
Given the following data :
A. 20, 21, 23, 19, 19, 20, 20
B. 1, 6,3, 15, 4, 12, 8
C. 3.4.3.4.3.4.3
D. 12. 14, 13, 14, 12, 13, 12
Standard deviation = √[Σ(x - μ) / n]
Where x = scores, μ = mean value of the scores or data, n = number of values in the data.
And mean(μ) = Σx / n
Using the online standard deviation calculator :
For data A: 20, 21, 23, 19, 19, 20, 20
σ = 1.2777531299999
For data B : 1, 6,3, 15, 4, 12, 8
σ = 4.6598589800857
For data C: 3,4, 3, 4, 3, 4, 3
σ = 0.49487165930539
For data D: 12, 14, 13, 14, 12, 13, 12
σ = 0.83299312783504
Therefore data B has the largest standard deviation.
In an isolated system, Bicycle 1 and Bicycle 2, each with a mass of 10 kg,
collide. Bicycle 1 was moving to the right at 5 m/s, while Bicycle 2 was
moving to the left at 3 m/s. What is the magnitude of their combined
momentum before the crash?
Answer: 20 kgm/s
Explanation:
Given that M1 = M2 = 10kg
V1 = 5 m/s , V2 = 3 m/s
Since momentum is a vector quantity, the direction of the two object will be taken into consideration.
The magnitude of their combined
momentum before the crash will be:
M1V1 - M2V2
Substitute all the parameters into the formula
10 × 5 - 10 × 3
50 - 30
20 kgm/s
Therefore, the magnitude of their combined momentum before the crash will be 20 kgm/s
What is the correct interpretation of the formula Mg3B2?
Answer: C. There are 3 magnesium for every 2 bromine
Explanation: The formula Mg3Br2 represents the compound formed from the reaction between Magnesium metal and bromine. The compound is usually called magnesium bromide formed from ionic or eoectrovalent bonding of magnesium and bromine. The compound's could be interpreted to mean for there to attain stability, there are 3 magnesium ions for every 2 bromine.
(Mg^2+) + (Br^-1)
PLZZZ ANSWERRR!!!
Professional cameras have lenses that can be switched out, allowing the photographer to _____. A. convert the camera into a telescope B. change the appearance of the photo C. take pictures just like a disposable camera D. throw away lenses that have been used up
Answer:
i think option (a)
because they need zoom in
A country is deciding what to do about pollution given off by power plants.
Which of the following is an example of how science can be used to make this decision?
A. Scientists know what kind of power plants people want.
B. Scientists can measure how much pollution is given off.
C. Scientists are allowed to pass laws about pollution.
D. Scientists own most of the power plants in the United States.
Answer:
The correct option is B
B) Scientists can measure how much pollution is given off.
Explanation:
A) To determine what kind of plants do people want, a polling or a survey is carried out. It is not the job of a scientist to carry that out.
B) Scientist have derived various techniques to measure different kinds of pollution. For example, air pollution can be derived from the Air Quality Index, which measure the quality of the air. The higher the value of Air Quality Index, more is the pollution.
C) Scientists are not allowed to pass any laws regarding pollution. Any kind of laws, including those related to pollution are passed by the Congress.
D) Most of the powerplants in US are owned by private business, while some are under control of the government.
Answer:
Scientists can measure how much pollution is given off.
Explanation:
