Answer:
it's A
Explanation:
I JUST A FROM THE TOPIC
The pressure of a gas produces a net force (the sum of all the forces) at ____ angles to the wall of a container.
Answer: RIGHT angles
Explanation:
The pressure of gas produces a net force, i.e., the sum of all the forces at right angles to the wall of a container.
What is Pressure?A key idea in physics is pressure, which is measured as the amount of force per unit area acting perpendicular to a surface.
Imagine holding a tack between your forefinger and thumb, with the head on your forefinger and the pointy end on your thumb, and lightly pressing it there to comprehend pressure. The forefinger will not experience discomfort, but the thumb will feel it right away. The thumb is under the same amount of pressure as the forefinger due to the tack's limited surface area, but the pressure on the thumb is significantly greater.
A net force pressing on the container walls is created as a result of collisions with the container. Gas pressure is a result of this force acting perpendicular to the container walls. A pressure gauge can be used to measure this pressure.
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A 150 kg box requires a force of 200 N to be pushed across the floor at a constant velocity 2.0 m/s. What is the Normal Force acting on the box?
Answer:
normal force = mg
= 159× 9.8=1470N
Identify the sentence When you can see both sides of an issue equality we'll, you find it difficult to take a stand , but some people insist that you take one side or another .
Answer:
Compound-Complex sentence
Explanation:
compound-complex sentence is a type of sentence that is comprised of atleast two independent clauses also it is characterised by having one or more dependent clauses.
Among all types of sentences, compound-complex sentences are usually the most complicated as well as the longest. This is usually the point because it is made up of two sentence structures; compound and complex sentence structure.
An example of a compound complex sentence below;
Though Mike prefers watching high school films, he rented the latest spy thriller, and he enjoyed it very much.
what do you meaningful by ma of a levers is 3 vr of a lever is 4 and effect of a machine is 60%?
Answer:
To do this, you divide the distance from the fulcrum, the point at which the lever pivots, to the applied force by the distance from the fulcrum to the resistance force.
Which kind of investigations allow for the control of variables
Answer:
An experimental investigation allows you to control the variables.
An asteroid is hurtling towards Earth with a large amount of kinetic energy. When it enters the atmosphere it creates a small amount of gravitational energy. Once the asteroid hits the Earth, the asteroid breaks apart. What happens to the gravitational energy?
Answer:
All the gravitational energy is converted mostly to the kinetic energy of the debris of the asteroid as they scatter everywhere. Also, some of it is converted to the sound energy of the impact that will be heard and heat energy.
velocity is a vector quantity, and speed is a scalar quantity. The speed
Answer:
Speed is a scalar quantity – it is the rate of change in the distance travelled by an object, while velocity is a vector quantity – it is the speed of an object in a particular direction.
How can different objects interact when they are not even touching?
Answer: Magnetic and gravitational force
Explanation: When a magnet and an iron nail are kept at a distance,the magnet attracts the nail without touching using magnetic force. In this example, the magnet and the nail are interacting.
The earth pulls the moon towards it and keeps it in orbit without touching it, using gravitational force. In this example,the moon and the earth are interacting.
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What is the net force required to give an automobile with a mass of 1,600 kg an acceleration of 4.5 m/s2
Answer:
Fnet=7200 N
Explanation:
Fnet=mass x acceleration
mass= 1600kg acceleration=4.5m/s^2
Answer:
Net force= 7200 N or 7200 N*m/s^2 (It just depends)
Explanation:
1600 kg x 4.5 m/s^2 = 7200 kg*m/s^2 or 7200 N*m/s^2
Yuri built a model of the Solar System on his desk. But, it is not exactly the same as the real Solar System. What limits his model from being exactly the same? A. The Sun is a big star, and he cannot make a model of a star. B. It would be hard to make a model that shows the real sizes and distances between planets. C. Yuri is not able to use a model to show all eight of the planets. D. He would not be able to make a model that shows the colors of the planets.
Answer:
It would be hard to make a model that shows the real sizes and distances between planets ( B )
Explanation:
Yuri building a model of the solar system will face the difficult of replicating the correct distances between the planets and the real sizes of the planets, because in model building the key factors of the Model must be represented properly.
The size of the planets and the distance between the planets are key factors when trying to model the solar system. but the distance between the planets depends on the position of the planets on their orbits which means the distances are not constant ( fixed ) hence that would be the limitation of his model.
In what ways are electromagnetic waves differed from mechanical waves?
A. Electromagnetic waves can only travel through matter.
B. Electromagnetic waves transfer matter through empty space.
C. Electromagnetic waves are longitudinal waves
D. Electromagnetic waves can travel through empty space
Answer:
D. Electromagnetic waves can travel through empty space
Explanation:
After a few Google searches, this answer seems the most correct
Electromagnetic waves differ from mechanical waves by the fact that electromagnetic waves can travel through empty space.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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A particle starts with an initial velocity 3.5m/s and it accelerates uniformly at the rate 0.5m/s². The displacement in the first 3 seconds. *
pls help me
Answer:
final speed is (3.5 + 1.5) = 5 m/s
Explanation:
If it accelerates for 3 seconds with 0.5m/s² What will be the new speed?
An acceptation of 0.5 m/s² means that every second the speed increases by 0.5 m/s. After 3 * seconds you gain in speed by 3 * 0.5 = 1.5 m/s So the final speed is 3.5 + 1.5 = 5 m/ s
Here is another method:
u =3.5m/s
Make use of
a = (v-u) / t
where:
a is acceleration in m/s² =0.5
v is final velocity in m/s = ?
u is initial velocity in m/s = 3.5
t is time in s = 3
Rewrite so it starts with v =....
a = (v)/t - (u) / t
v/t = u/t + a
multiply left and right of the = sign by t
v = u + a * t
Substitutie the known numbers
v = 3.5 + 0.5 * 3
final speed is (3.5 + 1.5) = 5 m/s
Carrying Capacity is...?
Maximum individuals that a space can hold
Least individuals that a space can hold
Maximum number of different materials a space can hold
Least number of materials a space can hold
Which term best describes the phrase "something that happens"?
A. Experiment
B. Observation
C. Hypothesis
D. Phenomenon
The phenomenon is the term that best describes the phrase "something that happens", therefore the correct answer is option D.
What is science?The deliberate, scientifically justified quest and utilization of knowledge and comprehending of the natural and improvements in living standards are what is known as science.
As given in the problem,
Which term best describes the phrase "something that happens"?
A. Experiment
B. Observation
C. Hypothesis
D. Phenomenon
The phenomenon is the term used to define the process of happening things that may be natural or anthropologic.
Thus, The phrase "something that happens" is best described by the word "phenomenon," hence option D is the appropriate response.
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Body 1 has a mass m, and its moving in a circle with a radius r at a speed v. It has a centripetal force. F acting on it. If body 2 has a mass 2m and its moving in a circle of radius 4r at a speed 4v, what is the centripetal force acting on it
Answer:
The centripetal force on body 2 is 8 times of the centripetal force in body 1.
Explanation:
Body 1 has a mass m, and its moving in a circle with a radius r at a speed v. The centripetal force acting on it is given by :
[tex]F=\dfrac{mv^2}{r}[/tex]
Body 2 has a mass 2m and its moving in a circle of radius 4r at a speed 4v. The centripetal force on body 2 is :
[tex]F'=\dfrac{2m\times (4v)^2}{4r}\\\\F'=\dfrac{2m\times 16v^2}{4r}\\\\F'=8\dfrac{mv^2}{r}\\\\F'=8F[/tex]
So, the centripetal force on body 2 is 8 times of the centripetal force in body 1.
Which of the following best describes the circuit shown below?
A. Parallel
B. Open
C. Series
D. Short
Answer:
short circuit
Explanation:
the current will not pass through the lamp, but it will go through the small wire (less resistance than the lamp)
Which best contrasts Newton's and Einstein's ideas?
Newton believed that mass tells objects how to move. Einstein believed that the curvature of space-time tells force how to
move objects.
Newton believed that force tells mass how to move. Einstein believed that the curvature of space-time tells velocity how to
change.
Newton believed that distance tells gravity how much force to exert. Einstein believed that distance tells space-time how to
curve.
Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.
Answer:
Newton believed that mass tells gravity how much force to exert. Einstein believed that mass tells space-time how to curve.
Explanation:
Isaac Newton believed that bodies on earth had a force of gravity pulling them down as a result of their masses.
Albert Einstein believed that the bodies were not pulled down but were moving around in a circular sphere/manner.
This confirms Newton believing that mass tells gravity how much force to exert and Einstein believing that mass tells space-time how to curve.
Answer:
first one is for the assignment second is for the quiz
Explanation:
Assignment - C.
Quiz - D.
/3
Mickey He hits the puck
when it has an initial
velocity of 3.5 m/s [East].
The stick touches the puck
for 0.250 seconds and
changes the velocity to
6.75 m/s [East]. What is
the acceleration? show
your work below
Question 2
13
Matt plays badminton. He
serves the birdie with a
velocity of 4.25 m/s [right]
covering a displacement of
5.2 m [forward]. How much
time does this birdie's trip
take? show your work
below
Answer:
130m/s^2 and 1.22s
Explanation:
From V = u+at
Where V, u, a, and t are the final velocity, initial velocity, acceleration and time respectively.
v = 6.75m/s
u = 3.5m/s
t = 0.250secs
a = ?
V = u+at
6.75= 3.5+a(0.250)
6.75-3.5 = 0.250a
3.25=0.250a
Divide both sides by 0.250
3.25/0.250= 0.250a/0.250
a = 130m/s^2
The acceleration of the will be 130 meter per second
Question 2
Speed = distance/time
Given that speed= 4.25m/s
Distance = 5.2m and time = ?
4.25m/s = 5.2m/t
Cross multiply
4.25×t = 5.2
Make t the subject by dividing both sides by 4.25
4.25t/4.25 = 5.2/4.25
t = 1.22s
Hence the time taken will be 1.22 seconds
How much does it cost to operate a TV for a month if the TV uses 110 V in a 0.33 amp circuit and is operated for 6 hours a day. The cost per KWH is $0.08
Answer:
$0.52
Explanation:
Assuming 1 month = 30 days:
110 V × 0.33 A × 6 h × 30 = 6534 Wh
6.534 kWh × $0.08/kWh = $0.52
liquid can flow but solid cannot give reason
Answer:
well..
Explanation:
Liquid can flow but solid cannot because of differences in their properties
property of liquid which lets it flow:
inter-particular space is largeinter-particular attraction is small these properties tend to make the molecules of liquid free to flowproperty of solid which tends to obstruct flow:
inter-particular space is small and so it's compactinter-molecular attraction is strong hence no tendency to flowHope this helps!
(b) The speed of the vehicle is written as 90 km/h. State the speed in SI unit. Show your working in the space below.
Answer:
Explanation:I don't say you to mark my ans as brainliest but if it has really helped you plz don't forget to thank me...
Answer:
90 km/h = 25 m/ s
Explanation:
to understand
1 km = 1000 m
1 h = 60 minutes and since 1 minute = 60 s you can see that 1 h = 60 * 60 s
90 km / h = 90 1000m / 3600 s
90 *1 / 3.6
90/ 3.6
25 m/ s
so 90 km/h = 25 m/ s
(by the way 90 m/s = 3.6 * 90 = 324 km/ h )
what is one basic need that both monkey and a tree have in common
Answer:
water
Explanation:
both a monkey and a tree need water to survive.
Have a great day
Please do these please do all of them and no fake stuff
Answer:
1. d
2. g
3. b
4. h
5. i
6. e
7. c
8. a
9. j
10. f
Circuits can be closed or open; if closed, by a switch perhaps, electricity can flow, and if open it cannot. When components are wired in series, they are one after the other, which is often inefficient. When components are wired in parallel, there are two separate tracks, two paths for the current to flow through. Conductors like electricity, insulators do not.
An object starts at position -2m with an initial velocity of -4 m/s and a constant acceleration of +3 m/s^2.
a. In which direction is the object traveling initially?
b. What will be the object's velocity after 1s, 2s, 3s?
c. What will the objects position be after 3s?
Answer:
here is the answer
Explanation:
a) since displacement is given as a negative value, object must travelling i the negative direction (with respect to a cartesian plane).
b) after 1 second
v = u + at
v = -4 + 3× 1
v = -4 + 3
v = -1 m/s
after 2 seconds
v = -4 + 3×2
v = -4 + 6
v = 2 m/s
after 3 seconds
v = -4 + 3×3
v = -4 + 9
v = 5 m/s
c) we need to find the position after three seconds
initial velocity= u= -4m/s
final velocity = v= 5 m/s ( as previously calculated)
acceleration=3m/s²
s = ut + 1/2 × at²
s = -4×3 + 1/2 × 3×(3)²
s = -12 + 1/2 × 27
s = -12 + 27/2
s = 1.5 meters ( in the positive direction; as time has increased and acceleration in positive)
position = -2 + 1.5 = -0.5 meters
(s indicates distance travelled)
why do we need to study physics like how will it help our future
Answer:
It helps us to be aware of some things that guide us and laws or theories to help us learn further
what are the benefits of physical exercises?
Answer:
Manage your weight
Have lower blood pressure
Lower your risk of falls
it reduces your risk of heart attack
Oque ocorre com a velocidade se diminuímos o tempo, mantendo a distância constante? E se aumentarmos o tempo? Que tipo de grandeza sao tempo e velocidade?
How does a sound wave transfer energy to your ears ?
Answer:
A. Particles in air move in circles as the wave moves forward.
B. Particles in air move forward but not backward as the wave moves
forward.
C. Particles in air move up and down as the wave moves forward.
✔ D. Particles in air move forward and backward as the wave moves
forward.
Explanation:
The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. Your ear detects sound waves when vibrating air particles cause your ear drum to vibrate. The bigger the vibrations the louder the sound.
Answer:
Sound waves travel at 342 m/s through the air and faster through liquids and solids. The waves transfer energy from the source of the sound, e.g. a drum, to its surroundings. your ear detects sound waves when vibrating air particles cause your eardrum to vibrate. The bigger vibrations the louder the sound.
Explanation:
A 10 kg cart with a momentum of 10 kg• m/s hits a 20 kg cart at rest. Momentum is calculated by using
the formula p = mv, where m is the mass of an object and vis the velocity of an object.
Change in momentum formula
The change in momentum resulting from an external force is called the impulse (I=mv-mvo) and is related to the force applied through the Impulse-Momentum Theorem: I = F tc = mv - mvo . Here F is the external force applied and tc is the amount of time the force is in contact with the object.
The final velocity ( Vf ) of the cart at rest is : 0.5 m/s
Determine the final velocity of cart at restChange in momentum of the objects = m₁ * ΔV = m₂ * ΔV --- ( 1 )
Given that momentum ( p ) = m * v
where ; m₁ = 10 kg , p = 10 kg.m/s , v = ?
calculate for v
v = p/m = 10 kg.m/s / 10 kg
= 1 m/s
Back to equation ( 1 )
= 10 * ( 1 m/s ) = 20 * ( Vf - )
= 10 = -20 Vf
therefore Vf ( final velocity of cart at rest ) = 10 / 20
= 0.5 m/s
Hence we can conclude that The final velocity ( Vf ) of the cart at rest is : 0.5 m/s
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Which describes the role of the muscular system during physical activity?
Select all that apply.
1: It allows for movement.
2: It controls the breathing rate.
3: It forces venous blood to return to the heart.
4: It controls the heart rate.
Answer:
1.It allows for movement.
2.t controls the breathing rate.
4. It controls the heart rate.
Explanation: