Answer:
When a body moves along a straight line with uniform speed or steady speed is called Uniform motion. When a body moves along a straight line but with variable or change in speed is called non-uniform motion.Hope this answer helps.
Answer:
. When a body moves along a straight line with uniform speed or steady speed is called Uniform motion. When a body moves along a straight line but with variable or change in speed is called non-uniform motion
The rotor of an electric motor has an angular velocity of 3600 rpm when the load and power are cut off. the 125-lb rotor, which has a centroidal radius of gyration of 9 in., then coasts to rest. knowing that kinetic friction results in a couple of magnitude 2.5 lb·ft exerted on the rotor, determine the number of revolutions that the rotor executes before coming to rest. (round the final answer to its nearest whole number.)
Answer:
θ '= 4975 rev
Explanation:
For this exercise let's use the relationship between work and the change in kinetic energy
W = ΔK
the expression for work is
W = - τ Δθ
where the negative sign indicates that the torque is in the opposite direction to rotation
kinetic energy
K = ½ I w²
we substitute
- τ Δθ = 0 - ½ I w²
θ = [tex]\frac{1}{2} \ \frac{I w^2}{\tau}[/tex]
if we approach the rotor to a cylinder with an axis of rotation through its center
I = ½ m r²
we substitute
θ = ½ (½ m r²) [tex]\frac{w^2}{\tau}[/tex]
How the measurements are in the English system, the weight
W = m g
m = W / g
let's reduce to the english system
w = 3600 rev / min (2pi rad / 1rev) (1 min / 60s) = 376.99 rad / s
r = 9 in (1 ft / 12in) = 0.75 ft
let's calculate
m = 125/32 = 3.91 slug
θ = ¼ 3.91 0.75² 376.99² / 2.5
θ = 3.126 10⁴ rad
let's reduce to revolutions
θ’= 3.126 10⁴ rad (1rev / 2π rad)
θ’= 4974.9 rev
θ '= 4975 rev
A student lifts their 5 kg backpack 2 meters off the floor. How much work does the student do on the backpack?
5/2= 2.5 J
5 x 2 = 10 W
5/2 = 2.5 W
5 x 2 = 10 J
Answer:
the answer is 10 w because it multiples 5x2 and the answer is 10 w because (w stands for work)
A car of mass 800 kg goes round a corner of radius 65 m at a
speed of 10 m/s
b) Suggest how this force is likely to be obtained.
Answer:
Centrifugal force = 1230.77 Newton.
Explanation:
The force associated with the car is generally referred to as centrifugal force and it can be calculated using the formula;
Centrifugal force = mv²/r
Given the following data;
Mass = 800kg
Radius = 65m
Velocity = 10m/s
To find the force;
Centrifugal force = (800*10²)/65
Centrifugal force = (800*100)/65
Centrifugal force = 80000/65
Centrifugal force = 1230.77 Newton.
A
is done by lifting the ball without prior swing of the leg.
A. Dodge
B. Kick
C. Scoop
D. Remove up
I’ll give brainless
you can swing your leg so it can't be kick, and remove up doesn't make sense and dodging it won't get you anywhere, so scooping it
1) A plane whose airspeed is 220 km/h heads due
north. It suddenly encounters a 150 km/h cross wind
blowing due east. What is the resulting velocity of
the plane with respect to the ground?
Answer:
=(220^2 +150^2)
/
put this on a square root
for you to get 266.2705391
round it to a whole number =266km/h
Explanation:
p
580 nm light shines on a double slit
with d = 0.000125 m. What is the
angle of the third dark interference
minimum (m = 3)?
(Remember, nano means 10-9.)
(Unit = deg)
Explanation:
Given that,
The wavelength of light = 580 nm
Slit separation, d = 0.000125 m
We need to find the angle of the third dark interference. For the dark fringe,
[tex]d\sin\theta=(m+\dfrac{1}{2})\lambda[/tex]
Put m = 3 and other values also.
[tex]d\sin\theta=(3+\dfrac{1}{2})\lambda\\\\d\sin\theta=\dfrac{7\lambda}{2}\\\\\sin\theta=\dfrac{7\lambda}{2d}\\\\\theta=\sin^{-1}(\dfrac{7\lambda}{2d})\\\\\theta=\sin^{-1}(\dfrac{7\times 580\times 10^{-9}}{2\times 0.000125 })\\\\\theta=0.93^\circ}[/tex]
So, the angle is 0.93°.
Answer: 0.665 deg
Explanation:
m=3
lambda= 580
d (converted to nanometers)= 125000
Using the equation of angle=arcsine of m-1/2 times lambda divided by d, filled in it would be arcsine of 3-1/2 times 580 over 125000.
What produces the Coriolis Force on the movement of Earth's air masses?
O Warm, light air from the Equator moves north.
The rotation of the Earth from east to west.
O Heavy, cool air from the north moves south.
o The rotation of the Earth from west to east.
Answer:
rotation of earth from West to East
Why concave lens is called diverging lens
When a parallel beam of light passes through a convex lens, the rays become farther from one another when the come out. This process of rays is called ''to diverge''. The concave lens makes rays of light diverge, so it is called diverging lens.
A thin beam of light of wavelength 625 nm goes through a thin slit and falls on a screen 3.00 m past the slit. You observe that the first completely dark fringes occur on the screen at distances of ±8.24 mm from the central bright fringe, and that the central bright fringe has an intensity of 2.00 W/m² at its center. What is the intensity of the light at a point on the screen that is one-quarter of the away from the central bright fringe to the first dark fringe?
Answer:
I = 1.62 w/m^2
Explanation:
wavelength = 625 nm
position of screen = 3.00 m past the slit
Determine the intensity of the light
I = [tex]I_{0} ( sin\frac{\beta }{2 } /\frac{\beta }{2} )^2[/tex]
β = 2π*Dsin∅ / л
[tex]I_{0}[/tex] = 2
Attached below is the remaining part of the solution
which of the following is true about Electromagnets?
When the current is shut off, the magnetic field disappears.
they do not easily lose their magnetism.
they are naturally-occurring magnets
All of the above
None of the above
Answer:
A. When the current is shut off, the magnetic field disappears.
Explanation:
Electromagnetism is a method in which magnetism is obtained from an electric current. It is an artificial way of producing a strong magnetic fields due to the flow of current.
Since the magnetic effect observed is due to the flow of an electric current, so when the current is shut off, the magnetic field disappears.
It has a wide range of applications in manufacturing industries, electric bells, induction coil etc.
What is the coefficient for Magnesium Chloride?
Answer:
Magnesium Chloride =MgCl 2
Explanation:
Hope I helped✌
I WILL MAKE U BRAINLIEST ! HELP PLS
Signals are digitized during transmissions over wireless networks. The chart lists possible features of digital communication.
Which features are correct?
1 and 2 only
3 and 4 only
1, 2, and 3
2, 3, and 4
Answer:
you got to add the chart my g
Explanation:
Answer:
You didn't add the chart fam
Explanation:
what is the speed of the pulley A if pully D is moving at a speed of 8 km/h
Answer:
hey I know the answer for this
Explanation:
it will be reduce the speed of A
the answer is 7.
this is the exact answer.
if you don't like this answer means pls comment me
What is the impulse (change in momentum) from a 2N force acting on an object for 2 seconds?
Answer:
Impulse = 4Ns
Explanation:
Given the following data;
Force = 2N
Time = 2 seconds
To find the impulse experienced by the object;
Impulse = force * time
Impulse = 2*2
Impulse = 4Ns
Therefore, the impulse experienced by the object is 4 Newton-seconds.
What type of chemical reaction is shown here? *
-Captionless Image
-Synthesis
-Decomposition
-Single Replacement
-Double Replacement
Answer:
single replacement reaction
What is the matching nitrogen base sequence for the gene below?
A- T- C-
A) T- G- T-
B) G- C- A-
C) T- A- G-
D) G- G- A-
Answer:
A
Explanation:
T-G-T is the answer .
the matching Nitrogen base sequence for gene ATC is A
what is The splitting of white light into its component colours is termed as?
Answer:
dispersion
As per your query the splitting of white or visible light into its component colours is known as dispersion. The splitting of white light when it passes through a glass prism into its constituent spectrum of colours is hereby known as dispersion.
What would happen if you didn't have chemical energy in your body? Choose the best answer.
A You wouldn't be able to think.
B You wouldn't be able to move.
C You wouldn't be able to sleep.
D You wouldn't be able to sit.
ill give a thanks
Answer:B
Explanation:
Because chemical energy fuels your body with energy so without it u wont have enough energy to move.
A student wants to design an investigation to determine if an object contains potential energy. What are some questions the student could ask to determine if the object contains potential energy?
Does the object have kinetic energy?
Does the object move when it is released from a rest position?
Does work have to be done to hold the object in place?
Does a force act on the object?
Answer:
does work have to be done to hold the object in place
Answer:
Does the object move when it is released from a rest position? and Does a force act on the object?
Explanation:
i had the same quiz today and the other 2 are wrong
Which statement is the best interpretation of the ray diagram shown below?
A. A concave lens forming a larger, virtual image
B. A concave lens forming a larger, real image
C. A concave mirror forming a larger, virtual image
O D. A concave mirror forming a larger, real image
Answer:
a concave lens forms a smaller, real image. { a p e x :)) }
Explanation:
hey, friend! this is the answer, but make sure that, next time, you include the diagram to make it easier for us to help you, okay?
A concave lens forming a larger real or virtual image and Concave mirrors form both real and virtual images. therefore all statements are correct. Therefore these can be interpreted by using Ray diagram.
What is Ray diagram ?A ray diagram is a diagram that shows path taken by light in order to see a point on the image of an object. Ray diagram uses lines with arrows to show reflected and incident ray.
A concave lens is a lens that diverges a straight light beam from the source to a diminished, upright, virtual image. It can form both real and virtual images. concave lens has curve on both side. The lens having only one side plane and other is curved inside, the les is called as planoconcave lens.
Concave mirror can form both virtual and real image that depends on the distance between the mirror and object. We get virtual and magnified image When the object is placed very close to the mirror. when distance between the object and mirror is increased, image gets diminished and real.
Both concave lens and mirror form both real and virtual images that's depend on the distance.
Hence all statements are correct.
To know more about ray diagram click :
https://brainly.com/question/12013737
#SPJ7.
PLEASE HELP!!
16. Carol views a specimen under the microscope and notices that it has no nucleus. What
must she be looking at?
A. Animal cell
B. Plant cell
C. Bacteria
D. Protist
Answer:
C. Bacteria
Explanation:
Bacteria and archaea are the two domains which consist of organisms with prokaryotic cells. Prokaryotic cells are cells without nuclei or membrane-bound organelles.
Please Help ASAP!!!
What/Where is the direction of wind during launch of a paper aeroplane? (Bernoulli's Principle)
Answer:
The Forces of Flight
At any given time, there are four forces acting upon an aircraft.
These forces are lift, weight (or gravity), drag and thrust. Lift is
the key aerodynamic force that keeps objects in the air. It is the
force that opposes weight; thus, lift helps to keep an aircraft in
the air. Weight is the force that works vertically by pulling all
objects, including aircraft, toward the center of the Earth. In order
to fly an aircraft, something (lift) needs to press it in the opposite
direction of gravity. The weight of an object controls how strong
the pressure (lift) will need to be. Lift is that pressure. Drag is a
mechanical force generated by the interaction and contract of a
solid body, such as an airplane, with a fluid (liquid or gas). Finally,
the thrust is the force that is generated by the engines of an
aircraft in order for the aircraft to move forward.
Explanation:
ball hit with bat is example of?
Answer:
batmintan ......
.
.
.
.
.
.
.....
.
thanks
A 0.49 kg squirrel jumps from the ground to a tree branch that is 2.1 m high.
What is the gravitational potential energy of the squirrel in the tree? Show your
work
Answer:
9882.516J
Explanation:
49kg*9.8m/s2*2.1m=9882.516 J
Someone please help I’m so confused
Explanation:
the switch and the battery
Acceleration due to gravity is stated as a constant which is given 9.8 m/s2. Many scientists have planned and design experiments to investigate if this value is true or false, and most of the results have concluded that the values of acceleration due to gravity ranges from 9.8 m/s2 to 10 m/s2.
What process is used to make food safer for consumption by killing bacteria within the food ? A. freezing B. fermentation C.antibiotic treatment D. pasteurization
To increase an impulse:
A. increase the change in momentum.
B. decrease the change in velocity.
C. increase the distance.
D. decrease the mass.
Calculate the kinetic energy of a moving 4 kg object traveling at a velocity of 3 m/a
Answer:
Explanation:KE = 18 J
Radio waves travel at the speed of light. Marsha listen to radio station at 91.3 mHz, which is a frequency of 9.13*10^ 7 H2 What is the wavelength of this radio signal in a vacuum?
Answer:
3.29 meters
Explanation:
c = λ f
c = speed of light = 3 * 10^8 m/s
λ = wavelength
f = frequency
3 * 10^8 m/s = λ * (9.13 * 10^7 1/s)
λ = (3 * 10^8 m/s) / (9.13 * 10^7 1/s)
λ = 3.29 m