Explanation:
gas vibrate and move freely at high speeds, liquid vibrate, move about and slide past each other. solid vibrate (jiggle) but generally do not move from place to place
why does a fast working machine possess more power? Clarify your answer
Plz help by answering
Power can be defined as the rate at which energy is converted per unit time
and the formula is given below
Power = Force × Velocity
In a machine, there are series of energy conversion which takes place to
ensure work is done to achieve a goal. When the machine works fast, the
energy conversion increases with time.
The increase in energy conversion depicts that more work is done and the
machine has more power.
Read more about Power here https://brainly.com/question/16566374
what is the relationship between frequency and wavelenghts of an EM wave?
A.as wavelengths decreases, the frequency of the waves increases.
B.as wavelengths decreases,the frequency also decreases
C.the wavelength and the frequency has a direct relationship
D.there is no relationship existing between wavelength and frequency
Answer:
a...as wavelengths decreases ,the frequency of the waves increases.dimension for weight
Answer:
What is meant by
Explanation:
Dimensions
Answer:
The dimension of weight is MLT−2: mass times acceleration, that is, a force.
Explanation:
hope this will help you
how would our lives be different if we didnt have the technology based on the other parts of the EM Spectrum
Answer:
it would be horrible
Explanation:
yeah
I was walking down the street and collapsed. My heart was racing and I struggled with
breathing. As I lay there, I watched as people walked by me not offering to help. At
one point I thought a young lady was looking towards me but when she noticed
everyone else's behavior, she turned and walked on past me. This scenario shows:
O the mere exposure effect.
O the fundamental attribution error,
O social loafing.
the foot-in-the-door phenomenon.
O the bystander effect.
Answer:
O the bystander effect.
Explanation:
In psychology, bystander effect is a theory that explains the unwillingness of a person to render help due to the presence of others. This theory explains that there is every tendency to help a victim in need when others are not there but act contrarily in the presence of others.
This is the case in this question where someone collapsed and laid helplessly on the floor due to difficulty in breathing. People walked past this victim without rendering assistance, however, a young lady who was about to help also walked past when she noticed that others were there and not offering help. This young lady has just portrayed the "BYSTANDER EFFECT".
why does a typhoon hit a location twice?
A helium-filled balloon in the room of a house suddenly bursts.
State and explain, in terms of atoms, what happens to the helium from the
balloon after the balloon has burst.
What is the impulse on a 45,000 kg airplane when it changes its velocity
from 242 m/s to 258 m/s?*
Answer:
=720000kgm/s
Explanation:
The impuse is equivalent to the rate of change of momentum which is expressed below as
Impulse= mv2 - mv1
=m(V2 - V1)
V1= initial velocity= 242 m/s
V2=final velocity= 258 m/s?
m= mass of the plane =45,000 kg
Then if we input the values, we have,
= 45000(258-242)
=720000kgm/s
Hence,the impulse on a 45,000 kg airplane is 720000kgm/s
20 pts !!!!
Four identical pallets of bricks, each with a mass of 40 kg with a square cross-sectional area of 0.50 m2, are stacked on the floor. What is the change in height of the pallet at the bottom of the stack if the pallets are 5.0 m tall when not stacked?
a.
1.04 μm
b
0.78 μm
c
0.26 μm
d
0.16 μm
A car of mass 700 kg and movie at a speed of 30 m per 2nd collides with a stationary truck of mass 1400 kg and the 2 vehicles locked together on impact and the combined velocity of the car and the truck after the collision is what
Answer:
10m/s
Explanation:
(m1)(v1)+(m2)(v2)= (m1+m2)(v[final])
(700)(30)+(1400)(0)= (700)(v)+(1400)(v)
21000= 2100v
v=10m/s
In this activity, you will research how scientists developed historical
models of the atom and present your findings. In the process, you
will draw evidence from texts to support analysis, reflection, and
research
Answer: Bohr's model (1913)
Niels Bohr improved Rutherford's model. Using mathematical ideas, he showed that electrons occupy shells or energy levels around the nucleus. The Dalton model has changed over time because of the discovery of subatomic particles.
Bohr's model (1913)
Niels Bohr improved Rutherford's model. Using mathematical ideas, he showed that electrons occupy shells or energy levels around the nucleus. The Dalton model has changed over time because of the discovery of subatomic particles
Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.
John Dalton
The idea that everything is made of atoms was pioneered by John Dalton (1766-1844) in a book he published in 1808. He is sometimes called the "father" of atomic theory, but judging from this photo on the right "grandfather" might be a better term.
Explanation:
HELP If a skater has a mass of 55 kg and the maximum height the skater can reach is 10 m, then what will be the velocity of the skater if they skate down to a height of 5 m?
please if someone could explain this to me, that'd be appreciated :)
Hello, for this applicate formula:
Vf² = Vo² + 2gh
Data:
Vf = Final Velocity = ¿?
Vo = Initial veloctiy = 0 m/s
g = Gravity = 9,81 m/s²
h = Height = 5 m
Replacing according our data:
Vf² = 0 m/s² + 2(9,81 m/s²)(5 m)
Vf² = 98,1 m²/s²
Vf = √98,1 m²/s²
Vf = 9,9 m/s
The final velocity will be 9,9 meters per second.
The answer is 9.9 m/s
a car drives at a velocity of 12 [m/s] for 9 [s]. what distance does the car drive?
Answer:
The car drives 108 m
A star has ______________________________________________; it appears to be moving across the sky as a night progresses.
Answer:
Apparent Motion
Explanation:
Apparent Motion of a star is a scientific term that describes the phenomenon that is observed as a result of the earth's rotation which is based on the area or where the observer is situated, and then the point at which the star is found comparable to the rotation axis of the earth.
This often makes the start to appear like it's moving across the sky.
Hence, A star has APPARENT MOTION; it appears to be moving across the sky as the night progresses.
Please help me with this question
Explanation:
I think the answer is 3/5
Un vagón de 250 kg situado en la cima de una montaña rusa inicia su descenso por una rampa inclinado 60º sobre la horizontal. Si no tenemos en cuenta el rozamiento: a. Dibuja todas las fuerzas que actúan sobre el vagón. b. Calcula la fuerza y la aceleración con que desciende.
Name ten scalar quantity and explain them
Answer:
A scalar is a quantity that is fully described by a magnitude only. It is described by just a single number. Some examples of scalar quantities include speed, volume, mass, temperature, power, energy, and time.
Examples of scalar quantity are:
Distance.
Speed.
Mass.
Temperature.
Energy.
Work.
Volume.
Area.
Explanation:
please mark me as brainliest thank you
What is the resulting acceleration when a net force of 18 N is applied to a 3.0 kg mass?
The resulting acceleration is 6m/s^2 , when a net force of 18 N is applied to a 3.0 kg mass.
Fnet = 18N
m= 3kg
Fnet = ma
18 = 3a
6m/s^2 = a
What is acceleration ?"Acceleration is the rate of change of the velocity of an object with respect to time. Accelerations are vector quantities. The orientation of an object's acceleration is given by the orientation of the net force acting on that object."
What is force ?"A force is an influence that can change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity."
Know more about acceleration here
https://brainly.com/question/14701568
#SPJ2
A 747 requires a takeoff speed of 270 meters per second if it is to get off the
ground. Calculate the acceleration required for the 747 that begins from rest
to takeoff on a 1000 meter long runway.
Answer:
a = 36.45[m/s²]
Explanation:
We can calculate the acceleration value by means of the following expression of kinematics.
[tex]v_{f}^{2} =v_{o}^{2} +2*a*x[/tex]
where:
vf = final velocity = 270 [m/s]
Vo = initial velocity = 0 (begins from rest)
a = acceleration [m/s]²
x = distance required by the plane = 1000 [m]
[tex](270)^{2} =0+2*a*1000\\72900=2000*a\\a=36.45 [m/s^{2} ][/tex]
The amount of current flowing through a conducting material when 360C charge flows for 3min
Answer:
Amount of current (I) = 2 Amperes
Explanation:
Given:
Coulomb charge = 360 C
Time = 3 min = 3 x 60 sec = 180 sec
Find:
Amount of current
Computation:
Amount of current (I) = Coulomb charge / Time
Amount of current (I) = 360 / 180
Amount of current (I) = 2 Amperes
a 100kg car travels at 2m/s. what is the momentum in kg
Answer:
200 kg.m/sExplanation:
The momentum of an object can be found by using the formula
momentum = mass × velocity
From the question we have
momentum = 100 × 2
We have the final answer as
200 kg.m/sHope this helps you
What is the net work done to lift a 6 kg block a height of 5.3 meters and then lower it back to the ground where it started?
Answer:
636 J
Explanation:
The weight of the block is =mg = 6kg × 10 ms-2 = 60 N
Since it was raised and dropped back to it's original position, distance = 5.3 × 2 = 10.6 m
Work done = 60N × 10.6 m = 636 J
6. Find the acceleration of a 25kg crate man pushing it with 45N force?
Answer:
1.8m/s2
Explanation:
force=mass x acceleration
so,
acceleration=force /mass
=45/25
=1.8
3. a stone thrown up is caught by the thrower after 6 seconds how high did it go and where was it 4 seconds after start (g = 9.8m/s2)??
Answer:
here, v = 0, a = - 9.8 m/sec^2, t = 3 sec
v = u + at
0 = u + (-9.8) * 3
0 = u - 29.4
u = 29.4 m/sec
here, u = 29.4m/s, t = 3sec, a= -9.8m/s^2
s = ut + 1/2 a t^2
s = 29.4 * 3 + 1/2 * - 9.8 * 3^2
s = 88.2 - 4.9 * 9
s = 88.2 - 44.1
s = 44.1 m
here, u = 0, a = 9.8m/s^2, t = 1 sec, s = ?
position after 4sec :
s = ut+ 1/2 at^2
s = 0 * 1 + 1/2 * 9.8 * 1^2
s = 4.9m
please mark me as a brainelist
What is the mechanical advantage of the lever shown below?
Answer:1.35
Explanation:
The mechanical advantage of the lever shown in the question is 1.27. Mechanical advantage is the force amplified by a mechanical tool. Thus, the correct option is B.
What is Mechanical advantage?Mechanical advantage is the measure of the force amplification which is achieved by using a tool such as, a mechanical device or machine system. The mechanical device trades off input forces against the movement to obtain a desired amplification in the output force of the system.
Mechanical advantage of the lever is simply the ratio of the effort arm to the load arm. Effort arm is the distance from the pivot to the point of application of the force while the load arm is the distance of the lord from the pivot point.
Therefore, the effort arm is 0.27m while the load arm is 0.2 m. Mechanical advantage is calculated through the formula:
MA=effort arm/load arm
MA = 0.27/0.2
MA = 1.35 which is close to 1.27
Therefore, the correct option is B.
Learn more about Mechanical advantage here:
https://brainly.com/question/16617083
#SPJ2
Your question is incomplete, most probably the complete question is:
What is the mechanical advantage of the level shown below?
A. 0.79
B. 1.27
C. 2.6
D. 3.67
A toy rocket fires its engines to launch it straight up from rest. After a short time, the engine turns off and the
rocket continues before falling back to the ground. The velocity - time graph for the rocket's complete
journey is shown
At what time after launch does the engine turn off?
Answer:
at 10 seconds.. b/c that's when the velocity stops increasing..
Explanation:
Identify the physical property of a material that plays an important role in determining if the collision is elastic or not based on your air tracks simulation data.
Answer:
They are spherical and hollow (not compact or dense)
Explanation:
An elastic collision is a form of a collision where kinetic energy and momentum are conserved in the process. When there is zero loss of kinetic energy and momentum, it is called a perfectly elastic collision.
This form of collision is observed in atmospheric gases and colliding balls which happens to be spherical and hollow.
How did unarmed defense techniques develop? Why were they needed? Why not just use a knife or a sword?
Answer:
Buddhist monks traveled from india to china and because of their beliefs they weren't allowed to use weapons.
Explanation:Ez
The brakes on a 15,680 N car exert a stopping force of 640 N.
The car's velocity changes from 20.0 m/s to 0 m/s. What is the
mass of the car? (Estimate 10 N/kg for g.)
Answer:
1568 Kg is the answer
Explanation:
The point of a nail has an area of 0.25cm squared, and an average person has a weight of 700 N. Explain in detail why it is possible to lie on a bed of 4000 nails, but not on one single nail. Thanks
Answer:
It is possible to lie on a bed of 4000 nails, but not on one single nail because a bed of 4000 nails exerts lesser pressure than a bed of one single nail .
Explanation:
Given;
weight of an average person, W = F = 700 N
area of the nail, A = 0.25 cm² = 0.25 x 10⁻⁴ m²
The pressure exerted by a single nail is given as;
P = F / A
P = 700 / (0.25 x 10⁻⁴)
P = 2.8 x 10⁷ N/m²
The pressure exerted by 4000 nails is given as;
Total surface area of 4000 nails = 4000 x 0.25 x 10⁻⁴ m² = 0.1 m²
P = F / A
P = 700 / 0.1
P = 7,000 N / m²
From the calculated values, 4000 nails exerts less pressure on the person than one single nail because pressure decreases with increase in surface area of an object.
Thus, it is possible to lie on a bed of 4000 nails, but not on one single nail because a bed of 4000 nails exerts lesser pressure than a bed of one single nail .