This table shows the weights of four different objects that are sitting on the floor. A person tries to lift each object with a force of 18 N, upward. Which
statement is supported by the data in the table?
Answers
Answer: A
Explanation:
The guy above me was right
Motion is caused by the forces acting on a body. A body will move in the direction of in which the net force is greater. Therefore, objects 1 and 2 will not move but 3 and 4 will accelerate upward.
From the table ; the upward force of 18N is lesser than the force maintained by the objects at rest. Hence, objects 1 and 2 will not move.
However, objects 3 and 4 have forces 16N and 8N respectively which are lesser than the upward force, hence, the body will move upward since the upward force is greater.
Therefore, objects 1 and 2 will not move but 3 and 4 will accelerate upward.
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Related Questions
explain why the two methods are likely to give different results?
Answers
Explanation:
Averaging uses estimation to find the answer and is likely close to the answer, but not exact, especially if it's decimals. Calculating gives exact answers, which gives a difference in the two answers or results.
What is the difference between a comet and an asteroid?.
Answers
Answer:
What is the difference between a comet and an asteroid?
Well, the difference between them is the composition which means what they're made of.
Asteroids are made of metals and rocky material.
Comets are made of Ice, dust, and again rocky material.
Hope this helps at least a little:) Have a nice day<3
What process changes light energy to heat?
refraction
absorption
reflection
Answers
Answer:
Absorption and reflection is correct
Explanation:
Answer:
absorption
Explanation:
a good example of this is black tar that's been sitting in the sun for hours, over time it gets more and more hot until it starts burning your feet it's mostly because it absorbs the light and heat from the sun and doesnt release it. hope my example helped :)
Another good example of light getting absorbed from the sun is solar pannels :D
A friend tells you that a different size of ball bearing might make your skateboard move faster. You try three different sizes and keep track of the time to roll 50 feet. You write down exactly how you tried the ball bearings on your skateboard and make a chart of the time it took to roll the 50 feet for each size ball bearing.
Answers
Answer:
Experimental variablr
Explanation:
I just did it:)
1. The radius of Earth is 6.40 x 10° km. The moon is about 3.84 × 10' km away
from Earth and has a diameter of 3475 km. The Pacific Ocean surface, which
can be considered a convex mirror, forms a virtual image of the moon. What is
the diameter of that image?
Answers
Answer: 28.71 km
Explanation:
For the convex mirror (ocean):
Radius of curvature = 6.4*10^3 km
Focal length (f) = R/2 = 3.2*10^3 km
Object distance (u) = -3.84*10^5
Mirror formula: [tex]\frac{1}{u} + \frac{1}{v} = \frac{1}{f}[/tex]
[tex]\frac{1}{u} + \frac{1}{v} = \frac{1}{f}[/tex]
[tex]\frac{-1}{3.84*10^5} + \frac{1}{v} = \frac{1}{3.2*10^3}[/tex]
v = 3173.55km
Magnification, [tex]m = \frac{-v}{u} = \frac{-3173.55}{-3.84*10^5} = \frac{h_{i} }{h_{o} }[/tex]
So, height of image/height of object = 3173.55/3.84*10^5
Diameter of image = 3173.55/3.84*10^5 * 3475
Diameter of image = 28.71 km
Therefore, the diameter of the image is 28.71 km
Analyze Is it possible for an
object that has a constant
negative acceleration to
change the direction in which
it is moving? Explain why or
why not.
Answers
Answer:
Yes it is possible. An object can have a negative acceleration (deceleration) and change its direction. Take for example a car decelerating from 5 m/s to a speed of 1 m/s and then taking a right turn. It changed its direction while still maintaining a negative acceleration.
Which is a characteristic of the image formed between F and the center of the lens? The image is located between F and the center of the lens, on the other side of the lens. The image is real. The image is upright. The image is bigger than the actual object.
Answers
Option C is correct. The image is located between F and the center of the lens, on the other side of the lens the upright than the actual object.
What is the upright image?Virtual and imaginary image is the type of upright image. A virtual picture is generated when light rays appear to meet at a certain spot following reflection from a mirror.
The picture that appears right-side-up is called an erect image. Unlike a virtual image, it is created by the real junction of light beams.
The lens in the illustration is a concave lens. The light rays that fall from the item onto the lens diverge, making it a diverging lens.
The item is held between the focus and the lens's center. At the same side of the item, an image would form between the focus and the lens's center.
The picture would be simulated, shrunk, and centered. As a result, the correct answer is: "The picture is upright."
Hence option C is correct
To learn more about the upright image refer to the link;
https://brainly.com/question/1490476
Which does not utilize the gyroscope effect? question 12 options:
a spiral pass in football
a spinning top
a flying plastic disk
a magnetic compass
Answers
A spinning top (also called easily a top) is a specific toy that does not utilize the gyroscope effect during its movement.
What is the gyroscope effect?The gyroscope effect refers to the characteristic that allows an object to maintain a constant direction of axis rotation when it is rotating.
This effect (gyroscope effect) mainly depends on the velocity of the object and its direction.
The gyroscope effect is exploited by many applications such as in missiles or satellites when they are in orbit.
Learn more about the gyroscope effect here:
https://brainly.com/question/5073075
Two identical spheres are attached to opposite ends of a thin rod of negligible mass, as shown in the figure. The
spheres-rod system is thrown straight upward and is rotating counterclockwise as it moves through the air. Which of
the following is correct about the angular momentum of the spheres-rod system while it is in the air? What is a valid
justification?
(A) The angular momentum remains constant because there is never a net torque acting on the system.
(B)
The angular momentum remains constant because there is a changing net torque acting on the system that
averages to zero over time.
(C) The angular momentum constantly decreases because there is a constant net torque acting on the system.
(D) The angular momentum constantly increases because there is a constant net torque acting on the system.
Answers
The angular momentum remains constant because there is a changing net torque acting on the system that averages to zero over time.
What is principle of conservation of angular momentum?This principle states that If the external torque acting on a system is zero, then the angular momentum of the system is constant.
When the spheres-rod system is thrown straight upward and it rotates counterclockwise, the net torque acting on the system averages to zero over time.
Thus, we can conclude that, the angular momentum remains constant because there is a changing net torque acting on the system that averages to zero over time.
Learn more about angular momentum here: https://brainly.com/question/7538238
State the five important assumptionns of the kinetic theory of matter
Answers
A student has begun training for tryouts for cross country by running a two mile loop through
her neighborhood every evening. Part of the run is a very steep hill. One evening, the
student is running down the hill at a very quick pace when she notices a dog lying in the
middle of her path. To avoid hitting the dog, she tries to stop but has difficulty. With
effort, she is able to stop right before running into to the dog.
Explain why it was so difficult for the student to stop. In your response, be sure to
include:
○ the role of Newton’s first law in making it difficult for the student to stop.
○ the correct use of the term inertia.
○ why some objects in motion have more inertia than others.
Be sure to consider the completeness of your response, supporting details, and accurate
use of terms
Answers
Answer:cause they running down a steep hill
Explanation: that's a confusing question
What is the density of a cube of iron that is 3 inches on each side and has a mass of 13g?
Answers
Answer:
[tex]\boxed {\tt 0.481481481 \ g/in^3}[/tex]
Explanation:
Density can be found by dividing the mass by the volume.
[tex]d=\frac{m}{v}[/tex]
The mass is 13 grams. Let's calculate the volume. This is a cube, so the volume formula is:
v=s³The side length (s) is 3 inches v=(3 in)³= 3 in * 3 in * 3in = 27 in³The volume is 27 cubic inches.
[tex]m= 13 \ g\\v= 27 \ in^3[/tex]
Substitute the values into the formula.
[tex]d=\frac{13 \ g}{27 \ in^3}[/tex]
Divide.
[tex]d=0.481481481 \ g/in^3[/tex]
The density is 0.481481481 grams per cubic inch.
At one point in the rescue operation, breakdown vehicle A is exerting a force of 4000 N and breakdown vehicle B is exerting a force of 2000 N.
(i) Using a scale of 1 cm = 500 N, make a scale drawing to show the resultant force on the truck.
Answers
Cecily is inflating one of her bicycle tyres with the pump below. When she pushes the plunger down, does the volume of the gas in the
cylinder increase, decrease or stay the same?
Answers
Answer:
See the explanation below
Explanation:
This problem can be better understood graphically, so in the attached image we will use a diagram of a positive displacement air pump.
We can see that when she pushes the plunger, we see that the volume decreases.
Why is an absorption spectrum especially useful for astronomers?.
Answers
Answer:
It has dark lines in it that allow astronomers to determine what elements are in the star. red-shifted (shifted toward the red end of the light spectrum).
Explanation:
A number of compounds containing the heavier noble gases, and especially xenon, have been prepared. One of these is xenon hexafluoride (XeF6), which can be prepared by heating a mixture of xenon and fluorine gases. XeF6 is a white crystalline solid at room temperature and melts at about 325 K. A mixture of 0.0600 g of Xe and 0.0310 g of F2 is sealed into a 100.0-mL bulb. The bulb contains no air or other gases. The bulb is heated, and the reaction above goes to completion. Then, the sealed bulb is cooled back to 20.0°C. What will be the final pressure in the bulb, expressed in torr?
Answers
Answer:
The answer is "82.2 torr"
Explanation:
moles of Xe:
[tex]= \frac{0.06}{131.293} \\\\ =0.00045699313 \ \mol[/tex]
moles of [tex]F_2[/tex]:
[tex]= \frac{0.0274}{38} \\\\= 0.00072105263\ \ mol[/tex]
moles of produced [tex]XeF_2:[/tex]
[tex]= 0.00024[/tex]
moles of left [tex]Xe[/tex]:
[tex]= 0.00021[/tex]
Calculate the Pressure:
[tex]= \frac{(0.08206\times 0.00024 \times 293)}{(.1)} + \frac{(0.08206\times 0.00021 \times 293)}{(.1)} \\\\= 0.10819611 \ \ atm \\\\ = 0.10819611 \times 760 \\\\ = 82.2 \ \ torr[/tex]
Can someone please help meee
Answers
Answer:
I think your answer might be letter C
Explanation:
If it is wrong I am so sorry forgive me if it is wrong let me know please ok.
Wendy runs 800m East on a straight road and then she turns west and runs back 200m back. What would be the distant she travelled and her displacement.
Answers
Answer:
Answer is C
Explanation:
I took it already
A long wire carrying a 5.5 A current perpendicular to the xy-plane intersects the x-axis at x=−2.0cm . A second, parallel wire carrying a 2.5 A current intersects the x-axis at x=+2.0cm . Part A At what point on the x-axis is the magnetic field zero if the two currents are in the same direction? Express your answer in centimeters. x x = nothing cm SubmitRequest Answer Part B At what point on the x-axis is the magnetic field zero if the two currents are in opposite directions? Express your answer in centimeters. x x = nothing cm SubmitRequest Answer Provide Feedback Next
Answers
Answer:
a
The point on the x-axis where the magnetic field will be zero is [tex] d = 2.8 \ cm [/tex]
b
The point on the x-axis where the magnetic field will be zero is [tex]Z = 5.333 \ cm [/tex]Explanation:
From the question we are told that
The first current is [tex]I_1 = 5.5 \ A[/tex]
The point of x- axis intersection is [tex]x = -2.0 \ cm[/tex]
The second current is [tex]I_2 = 2.5 \ A[/tex]
The point of intersection of the x-axis is [tex]x = 2 .0 \ cm[/tex]
Generally given that the current of the two wires are same direction it means that the magnetic field in -between the wires will cancel out giving zero
So
[tex]B_1 - B_2 = 0[/tex]
=> [tex]B_1 = B_2 [/tex]
=> [tex]\frac{\mu_o * I_1 }{2 * \pi * d } = \frac{\mu_o * I_2 }{2 * \pi * (4 -d) }[/tex]
Here d is the of one wire to the point where the magnetic field is 0
and given that the total distance in-between the wire is D = 2 = 2 = 4
Hence the distance of the other wire to the point where magnetic field is zero is (4 - d)
So
[tex]\frac{5.5}{ d} = \frac{2.5}{4-d}[/tex]
=> [tex] 8d = 22 [/tex]
=> [tex] d = 2.8 \ cm [/tex]
So the point on the x-axis where the magnetic field will be zero is [tex] d = 2.8 [/tex]
Generally given that the current of the two wires are opposition direction it means that the magnetic field at a position which is not in-between the wire will be zero
Let that position be k
Let the distance from the middle of both wires to k be Z
So
[tex]\frac{\mu_o * I_1 }{2 * \pi * ( 2 + Z) } = \frac{\mu_o * I_2 }{2 * \pi * (Z -2) }[/tex]
=> [tex]5.5 Z - 11 = 5+ 2.5 Z[/tex]
=> [tex]3Z = 16[/tex]
=> [tex]Z = 5.333\ cm[/tex]
which object will require the greatest amount of force to change its motion? a: a 63kg object moving 27 m/s b: a 75kg object moving 22 m/s c: a 72kg object moving 25 m/s d: a 55kg object moving 32 m/s
Answers
Answer:
A 72 kg object moving 25m/s
Explanation:
Answer:
C. a 72kg object moving 25 m/s
Explanation:
I just did it on A pex
Compare and contrast aerobic physical activity with anaerobic physical activity.
simple, please :)
Answers
Answer: ompare and contrast aerobic physical activity with anaerobic physical activity. ... Aerobic physical activity is better for the cardiovascular system than it is for strength endurance, while anaerobic physical activity is better at building strength endurance than it is at increasing cardiorespiratory fitness.
Explanation: hopefully this helped ;)
Answer:
Aerobic physical activity is actvity with motion. Anaerobic activity is the opposite. This means that it is an activity without motion.
Why did they compare the DNA to words in a language?
Answers
Answer:
to go to get a bike
Explanation:
What kind of question can be asked upon reflection.
Answers
Answer:
Explanation:
When dealing with optics, there is an incident wave, a reflected wave, and a transmitted wave. An incident wave is the initial wave coming out from the source, like a flashlight.
Then the reflected wave is created when the incident wave encounters an interface like a piece of glass. The reflected wave will reflect like you would expect.
Then, the transmitted wave is the wave which passes through the interface and continues.
So, a good question would be to ask for the value of the reflected wave function given an initial incident wave.
Another example entirely would be to look at the reflected wave on a tensioned string. If you shake a string up and down, a wave will be sent through it. Once hitting the wall, the wave will reflect back. A good question there is asking how the amplitude of the wave changed.
2 examples of all 7 wave behaviors
Answers
Answer:
radio waves
microwaves
A cyclist travels from A to B along the arc of a circle of radius 25 m as shown.
0 Calculate the distance travelled by the cyclist.
(ii) Calculate the displacement undergone by the cyclist.
A
4
25 m
12nn41
Answers
The displacement of the cyclist from point A to B is 39.3 m.
Displacement of the cyclist
The displacement of the cyclist is equal to the change between the final position and initial position of the cyclist. This can also be described as the shortest distance between two positions.
From the given image, the displacement of the cyclist from point A to B can be determined by formula for calculating length of arc,
D = (θ/360) x 2πr
D = (90/360) x 2π x 25
D = 39.3 m
Thus, the displacement of the cyclist from point A to B is 39.3 m.
Learn more about displacement here: https://brainly.com/question/2109763
What factors does the speed of a wave depend on?
The amplitude
The frequency
The wavelength
The medium
Answers
Answer:
I think 3 options are correct
The speed of a wave is dependant on three factors: wavelength, frequency, medium..
Hope it helpz~
Answer:
wavelength, frequency, medium
Explanation:
amplitude is the only one not correct.
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Undigested and unabsorbed materials from the
small intestine pass into the
a. gall bladder
b. stomach
c. colon
d. liver
Answers
what is sound? what are the types of sound?
Answers
Answer:
Sound can be of different types—soft, loud, pleasant, unpleasant, musical, audible (can be heard), inaudible (cannot be heard), etc. Some sounds may fall into more than one category. For instance, the sound produced when an aeroplane takes off is both loud and unpleasant.
.
.
Please mark me as brainlist
Explanation:
sound is a form of energy which produces a sensation of hearing in our ears.
we are different types of sound around us everyday we are the sun for our making parents and friends to sound of Baker's running on the road the barking of dog the sound of elephant the clutter of pants in the kitchen.
radio television guitar animals battles machines Ekta some examples of sound
hope it helps
The toaster is switched on for 120 seconds the power of the toaster is 850 watts calculate the energy transferred by the toaster. Use the equation energy transferred = power x time
Answers
Explanation:
E=PT
so E= 850×120 so E = 102000
A roller coaster is moving at 20 m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10 m/s. What was the acceleration of the roller coaster? SHOW YOUR WORK!
Answers
Answer:
acceleration equal to 0.5 m / s
Explanation:
since 20 x 0.5 = 10