Answer: It is a vector quantity because it involves magnitude and direction.
Explanation:
momentum has magnitude and direction
Magnitude is a Scalar quantity
direction is a vector quantity
scalar times a vector is a vector
The type of quantity momentum has is that of a vector and it is denoted as option D.
What is a Vector quantity?
This is the type of quantity which has magnitude and direction present in it and momentum has the both.
The formula is mass × velocity in which velocity is a vector quantity which makes it that too.
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When a mass suspended from a spring is in its equilibrium position, the upward force exerted by the spring is equal to
the downward force exerted by gravity acting on the mass.
True
False
Answer:
True as according to Newtons 3rd law the spring must exert a equal force to gravity in order to stay in equilibrium position
Explanation:
Given the resistivities below, which material is best described as an insulator?
A. 4.5 22•m
B. 2.8 x 10-8
12.m
C. 1.7 x 10-8 2•m
D. 3.2 x 108 2.m
Answer: D) 3.2 × 10^8
Explanation: Insulators are best described as materials which are poor conductors of electricity and hence do not allow passage of electricity through them. Resistivity are hence used to describe property or characteristic of a material which does not allow the flow or passage of electric current.
In summary, materials which high resistivity values are referred to as Insulators. Conversely, those with low resistivity or high conductivity values are called conductors while those with intermediate values are named semiconductors.
In the question given above, the material with a resistivity value of 3.2 × 10^8 - - - has a very high resistivity value (320000000Ω), the other options given have very low resistivity values ; 0.0000000017, etc and are most likely to be conductors due to their excessively low resistivity values.
In a closed system, _____ energy is equal to potential energy plus kinetic energy. A. mechanical B. electrical C. thermal D. chemical
Answer:
Well, Your answer is Mechanical. Because, The Mechanical energy is the sum of the kinetic energy and the potential energy. In the closed systems, The mechanical energy is equel to potential energy plus kinetic energy.
Good Luck!!~
By Itsbrazts
Answer: Mechanical Energy
Explanation: The Mechanical energy of an object is equal to Potential energy plus Kinetic energy.
In which of the following situations or places would you want to reduce the
force of friction?
I A. Skiing down a hill during a race.
B. Walking down a steep hill.
C. Sitting in the bed of a pickup truck while it turns a corner
D. In the axle of the wheels while you ride your bicycle.
Answer:
D
Explanation:
The correct answer would be in the axle of the wheels while you ride your bicycle.
Options A, B, and C requires that the forces of friction is increased in order to have more control.
However, option D requires that there is a minimal frictional force in the axle of the wheels of a bicycle while riding so that a little effort would be required to keep the bicycle moving.
The lesser the friction, the lower the effort that would be needed to keep the bicycle moving and vice versa.
an inclined plane makes work easier by increasing the distance and decreasing the____.
Answer:
force
Explanation:
Answer:
force
Explanation:
What are data?
A. Pieces of information recorded in an experiment
B. Sources that summarize a primary source
C. Educated guesses about the outcome of an experiment
D. Variables that are adjusted by the experimenter
SUBNIIT
Answer:
Data is pieces of information recorded in an experiment because data are individual pieces of factual answer recorded and used for the analysis
Explanation:
I hope this will help you :)
you are on the airplane, about to fly to an exotic location. How do acceleration, speed and inertia work to overcome the forces of gravity and air resistance during the take-off?
Answer:
Make a paper airplane and have him toss it. his arm would be the thrust, the wings would provide lift, the shape of it would minimize drag (air resistance). However, if he put an engine on the same airplane, it would do the same thing as your arm would do.
So thrust, lift, shape.... Inertia is just a by product of the force that pushing you into your seat.
A camera lens focuses on an object 75.0 cm from the lensThe image forms 3.50 cm behind the lens. What is the magnification of the image?
Answer:
7/150
Explanation:
The following data were obtained from the question:
Object distance (u) = 75cm
Image distance (v) = 3.5cm
Magnification (M) =..?
Magnification is simply defined as:
Magnification (M) = Image distance (v)/ object distance (u)
M = v /u
With the above formula, we can obtain the magnification of the image as follow:
M = v/u
M = 3.5/75
M = 7/150
Therefore, the magnification of the image is 7/150.
Answer:
-0.0466
Explanation:
What statement describes earthquakes?
Answer:
A
Explanation:
it is cause When the stress on the edge overcomes the friction, there is an earthquake that releases energy in waves that travel through the earth's crust and cause the shaking that we feel
Which of the following is a scalar quantity?
O A. 8 km/hr down
O B. 45 ft to the right
O C. 100 ft/min
O D. 25 m/s south
why doesn't the skateboarder rolls as high up the ramp each time you go down the ramp
Answer:
Some of her energy transforms to thermal energy.
Explanation:
A negative externality:
A) is a cost to a bystander.
B) is a cost to the buyer.
C) is a cost to the seller.
D) exists with all market transactions.
Answer:
A) is a cost to a bystander.
Explanation:
A negative externality is defined as the difference between the social cost and an economic agent from the private cost of an action.
A negative externality is a cost to a bystander as negative externality occurs when a transaction between a buyer and seller affects third party with a loss, which has no involvement in the transaction.
Hence, the correct option is A.
A scientist adds different amounts of salt to 5 bottles of water. He then measures how long it takes for the water to boil. what is the dependent variable in this experiment?
The graph below shows the conservation of energy for a skydiver jumping out
of a plane and landing safely on the ground. Which energy is represented by
line B?
A. Elastic energy
B. Kinetic energy
C. Light energy
D. Potential energy
Answer:
The correct option is:
B) Kinetic Energy
Explanation:
We know that if a body is placed at a certain height, it possesses Potential Energy, which is represented by 'mgh'. In this case, when the skydiver is present in the plane, before jumping, he has potential energy as he is at height 'h'.
As Kinetic energy is given as '(1/2)mv²' dependent on velocity of the object, when the skydiver jumps of the plane, his height starts decreasing, which decreases his Potential Energy. As energy can neither be created or destroyed, but is converted to one form or another, all this Potential energy starts to convert into Kinetic energy. As Potential Energy decreases with distance, Kinetic energy increases. Hence, line B represents Kinetic Energy.
Describe the extent of the swing !
Answer:Definition of swing it. informal. : to do or manage something successfully If he can swing it, he'll visit next
hydrogen bonding is a strong attractive force. T OR F
Answer:
F
Hope it helps you!
____________ interference occurs when two waves are out of phase
[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Wave Optics.
Whenever the waves are out of phase they form a DESTRUCTIVE interference.
thus,
Destructive Interference occurs when two waves are out of phase.
What constant horizontal force is required to drag a 5 kg block along a
horizontal surface with an acceleration of 1 ms-2 if the coefficient of
sliding friction between the block and the surface is 0.5.
Answer:
25N
Explanation:
formula=> Frictional force= coefficient of friction x normal reaction
normal reaction is mass x gravity(10N/kg)
so Frictional force= 0.5x5x10
=25N
but that is the Frictional force not the constant force
to get the constant force, subtract the Frictional force from the weight of the block
weight= mass x gravity
= 5x10
= 50N
50N-25N
=25N
The general kinematic equations of motion for vertical displacement can also be simplified significantly. Write the simplified
equation for y in this case. Explain how you have been able to simplify it from this general displacement equation:
Answer:
Δy = v₀t + (1/2)gt²
where g = 9.81 m/s if the body is moving downwards and g = -9.81 m/s if the body is moving upwards
Explanation:
The general kinematic equation for horizontal displacement is gives as:
Δx = v₀t + (1/2)at²
Where
Δx = change in the x direction
v₀ = initial velocity
t = time
a = acceleration
If the body is vertically instead of horizontally, Δx is changed to Δy
Δy = v₀t + (1/2)at²
For a vertical moving body, the acceleration it experiences is the gravitational accerelation of the earth 'g'
So the equation becomes:
Δy = v₀t + (1/2)gt²
where g = 9.81 m/s if the body is moving downwards and g = -9.81 m/s if the body is moving upwards
The general kinematic equations of motion for vertical displacement is written as [tex]h = v_0_yt - \frac{1}{2} gt^2[/tex].
The general kinematic equations of motion for vertical displacement is written as follows;
[tex]h = v_0_yt - \frac{1}{2} gt^2[/tex]
where;
h is the vertical displacement of the object[tex]v_0_y[/tex] is the initial vertical velocity of the objectg is the acceleration due to gravityt is the time of motion of the objectThus, the general kinematic equations of motion for vertical displacement is written as [tex]h = v_0_yt - \frac{1}{2} gt^2[/tex].
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Mary is allergic to cats. Mary's friend, Sue, has a roommate who has cats. Whenever Mary visits Sue, Mary sneezes even before she enters Sue's house. Mary's sneezing persists even after Sue's roommate and his cats have moved out. After a while, Mary stops sneezing before she enters Sue's house. The point at which Mary's sneezing stopped is an example of _____.
Answer: Extinction
Explanation: Extinction simply means cessation. A condition whereby an action or behavior exhibited by an individual or organism eventually stops. In psychological parlance, extinction is usually attributed to the discontinuance of a certain behavior usually due to non - reinforcement or eventual absence of the conditioned stimulus.
In the scenario above, the point at which Mary stopped sneezing is called extinction which is due to the removal of the cat which is the cause of Mary's sneezing behavior.
An overhead projector lens is 32.0 cm from a slide (the object) and has a focal length of 30.1 cm. What is the magnification of the image? (Unit=cm) PLS HELP
Answer: M = 14.3
Explanation:
Given the following :
Object distance (u) = 32cm
Focal length (f) = 30.1 cm
Magnification = image distance (v) / object distance (u)
Recall ; 1/f = 1/u + 1/v
1/30.1 = 1/32 + 1/v
1/v = 1/30.1 - 1/32
1/v = (32 - 30.1) / 963.2
1/v = 2.1 / 963.2
1/v = 0.0021802
v = 1/0.0021802
v = 458.66666 cm
Therefore, Magnification 'M' = v / u
M = 458.66666 / 32
M = 14.333333
M = 14.3
Answer:
M = -15.8
Explanation:
object distance = 32cm
focal length = 30.1 cm
To find M we first need to find di or image distance
I will use the equation: 1/f = 1/di + 1/do
By changing the equation to 1/f - 1/di = 1/do we get 0.0019725
equation with numbers plugged in:
1/30.1 - (1/32) = 0.0019725
To change 1/do to do we divide 1 by 0.0019725
You should get 506.97
Now use the equation
M = -(di/do)
M = -(506.97/32)
You should get M = -15.8
If the period of a certain wave (wavelength = 4.5 m) is 2 seconds, what is the speed of the wave?
0.44 m/s
1.1 m/s
9.0 m/s
2.3 m/s
Answer:
2.25m/s
Explanation:
wavelength=4.5m
period=2sec
frequency= 1/period
=1/2
speed= wavelength×wave frequency
=4.5×1/2
=2.25 m/s
so, none of the options are correct
Answer:
2.3 m/s
Explanation:
I took the test.
Is popcorn a object
Eatable is frequently used to define something that has some level of acceptable flavour, whereas edible is typically used to describe something that is safe to eat, regardless of taste.
What thing best defines as object?The portion of a sentence that the verb directs an action toward is known as an object. In a sentence written in standard English, the order is usually subject-verb-object. The action is performed by the subject, which is represented by the verb, and is received by the object.
Anything that humans can safely eat is considered to be edible. “Edible” differs from “eatable” because it solely considers if an object is suitable for consumption, rather than how it tastes. The term “edible” refers to naturally occurring, non-poisonous objects, such as some mushrooms, insects, seaweed, and so forth.
Therefore, popcorn is defined as an object.
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What is indicated by the slope of an acceleration vs. time graph?
A. The velocity of an object
B. The total displacement of the object
C. The change in position of the object
D. The maximum speed of the object
Answer:
Option A is tge correct answer.
Explanation:
The reason for above answer is the slope of acceleration vs time graph shows the velocity as when the acceleration gets positive , the velocity gets increased and when the acceleration gets negative tgen velocity also decreases.
hope it helps..
Answer:
no value was assigned to the slope of an acceleration vs. time graph
Explanation:
The voltage in a lightbulb is given by the equation V = IR. In this equation, Vis
the voltage, / is the current, and Ris the resistance. What is the resistance in a
lightbulb with a voltage of 25 V and a current of 0.2 A?
Answer:
R = 125 ohms
Explanation:
V = i * R
R = V / I
V = 25
I = 0.2
R = 25 / 0.2
R = 250 / 2
R = 125 ohms
An object is held 24.8 cm from a lens of focal length 16.0 cm. What is the magnification of the image?
Answer: 1.8
Explanation:
You are given
the object distance U = 24.8 cm
Focal length F = 16.0 cm
First find the image distance by using the formula:
1/f = 1/u + 1/v
Where V = image distance
Substitute u and f into the formula
1/16 = 1/24.8 + 1/v
1/ v = 1/16 - 1/24.8
1/v = 0.0625 - 0.04032258
1/v = 0.022177
Reciprocate both sides by dividing both sides by one
V = 45.09 cm
Magnification M is the ratio of image distance to the object distance. That is,
M = V/U
Substitute V and U into the formula
M = 45.09/24.8
M = 1.818
Magnification of the image is therefore equal to 1.8 approximately
Answer:
-1.82
Explanation:
the first answer process was actually somewhat correct but the signs were switched.
Answer it plz the answer is easy but cant undersatand
Answer:
2.
a. 3 meters^3 is the volume.
Explanation: This is when we find the volume of a rectangular prism which is whl so, 2*1.5*1=3^3.
b. 3000 is the mass.
Explanation: Density is calculated by mass/volume so, 1000=m/3. When we multiply 3 to both sides, we get 1000*3 which is 3000. So, 1000=3000/3.
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A stone is thrown up from the top of a tower. It reaches the ground in 5.64 seconds. A second stone is thrown down from the same tower. They have the same initial velocity. This stone reaches the ground in 3.6 seconds. The height of the tower and the initial velocities aren't given. You need to find them.
Answer:
9.25
Explanation:
Guy received his home loan for $200,000. Determine which of the following was the mortgage company’s most important reason for giving him his loan. budget plan of how the payments will be made the total value of current assets and all income the referral from other clients of the company the neighborhood in which the home is located NEXT QUESTION
Answer: The answer is "the total value of current assets and all income"
Explanation:
A 51-kg woman runs up a vertical flight of stairs in 5.0 s. Her net upward displacement is 5.0 m. Approximately, what average power did the woman exert while she was running?
Answer:
510
Explanation:
Power= Rate of doing work i.e work done\time
=force*displacement\time
=mass*g*d\t
=51*10*5/5
=510watt