Answer:
d
Explanation:
(a)The weight of two metallic spheres, each of 200 g and radius 4 cm and
10 cm respectively are measured in water and vacuum How will the ratio
of their weights change in water and in vacuum? Explain
a uniform beam 6.0 metre long and weighing 4kg rests on support at p and q placed left and right 1.0 metres from each end of the beam weights of mass 10 kg and 8kg are placed near p and q respectively one each end of the beam.calculate the reaction at p and q?
Answer:
Explanation:
I need the answer me too
Answer:
p and q are 4.0 m apart
moments around q
4 p = (10 * 5) + (4 * 2) - (8 * 1)
p = 12.5
Rp = 12.5 g
moments around p
4 q = (8 * 5) * (4 * 2) - (10 * 1)
q = 9.5
Rq = 9.5 g
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Explanation:
a mother and a daughter are sitting on park swings. they ask you to push them so they can swing to the same height. which will require you to push with more force?
Answer:
the mother
Explanation:
the child is smaller and has less mass so it would be easier to push the baby rather than the mother. so you would put more force into pushing the mother
If a car has traveled 24 km in 2 hours, what is its average speed?
Answer:
12km per hour
Explanation:
The formula is distance/time.
24km/2 hours = 12km/1 hour
Explanation:
average speed = distance / time
= 24km/ 2 hr
= 12 km/ hr
Hope this will be helpful to you .
What is the average speed between 5 seconds and 15 seconds?
Answer:
10 seconds
Explanation:
We can calculate the average speed by finding the total distance traveled divided by the elapsed time: Average speed=–s=Total distance Elapsed time
if a runner is going 600 miles in 6 minutes what is his speed?
What if he is still going 600 miles in 7 minutes?
A 50.0 kg child is riding in a 120.0 kg bumper car at an amusement park. The child drives the bumper car at 4.5 m/s head-on into the wall of the ride and rebounds at the speed. What is the magnitude of the change in momentum of the child in the bumper car?
Answer:
Explanation:
Total mass of child and car = 50 + 120 = 170 kg .
initial velocity u = 4.5 m/s
initial momentum = mass x velocity = 170 x 4.5 = 765 kg m/s
final velocity = - 4.5 m/s [ - ve is due to reversal of direction ]
final momentum = - 765 kg m/s
change in momentum = final momentum - initial momentum
= - 765 - ( 765 )
= - 1530 kg m/s .
Momentum of a body is the product of mass and the velocity of the body.
The magnitude of the change in the momentum of the child in the bumper car is 1530 kg-m/s.
What is change in momentum?The change in momentum of a object is the difference of the final momentum to the initial momentum.
Given information-
The mass of the child is 50 kg.
The mass of the bumper car is 120 kg.
The initial velocity of the bumper car is 4.5 m/s.
Momentum of a body is the product of mass and the velocity of the body. The initial momentum of the child in the bumper car is,
[tex]p_i=(m_c+m_b)u[/tex]
Here, [tex]m_c[/tex] is the mass of child and [tex]m_b[/tex] is the mass of the bumper car. Also [tex]u[/tex] is the initial velocity,
[tex]p_i=(50+120)\times4.5\\p_i=765[/tex]
Thus the initial momentum of the child in the bumper car is 765 kg-m/s.
When the bumper car head-on into the wall of the ride then it rebounds at the speed. Thus the final momentum will be opposite in the direction. Thus final momentum is,
[tex]p_f=-p_i\\p_f=-765[/tex]
As the change in momentum of bumper car is the difference of the its final momentum to the initial momentum. thus,
[tex]\Delta p=pf-pi\\\Delta p=-765-765\\\Delta p=-1530[/tex]
Hence the magnitude of the change in the momentum of the child in the bumper car is 1530 kg-m/s.
Learn more about the change in momentum here
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A horse pulls on a wagon. The reaction force is the wagon pulls on the horse.
true or false?
Answer:
True
Explanation:
the horse pull on the wagon but friction and the wight + gravity make the wagon pull on the horse ( newton's 2ed law)
Need help ASAP please and thank you
Answer:
253
Explanation:
He stands at 50 so you keep counting by 50 until you get it to add three.
discuss main features of series combination of resistors and determine the equivalent resistance also .
Answer:
Let's briefly summarize the major features of resistors in series:
Series resistances add together to get the equivalent resistance (Equation 10.3. 2): RS=R1+R2+R3+... ...
The same current flows through each resistor in series.
Individual resistors in series do not get the total source voltage, but divide it.
What is the easiest way to add energy to matter? Heating it Cooling it Decreasing pressure Decreasing temperature
Answer:heating it
Explanation:
Answer:
Heating it
Explanation:
i took the k12 test and got a A
The internal carrying force of the 4 volts of the cell in the enclosed circuit is negligible. Find out
1 total resistance
2nd circuit
3 Differential difference between a and c points
Answer:
thaYeah, I kinda dont have an answer for you either... sorry -__-
Explanation:
A CIRCULAR COIL OF 20 TURNS OF RADIUS 10.0 cm IS PERPENDICULAR TO A 0.30 tesla MAGNETIC FIELD. HOW MUCH INDUCED emf IS CREATED WHEN THE COIL IS ROTATED IN 0.12 s, SO ITS FACE IS PARALLEL TO THE FIELD?
Answer:
1.57 V
Explanation:
The induced emf ε = -ΔΦ/Δt where Φ = magnetic flux = NABcosθ where N = number of turns of circular coil = 20, A = area of coil = πr² where r = radius of coil = 10.0 cm = 0.1 m , B = strength of magnetic field = 0.30 T,θ = angle between normal to are and magnetic field and Δt = change in time = 0.12 s
Now ΔΦ = change in magnetic flux through circular coil = Φ' - Φ
Φ = magnetic field when A is perpendicular to B , that is θ = 90°. So, Φ = NABcos90 = 0 and Φ' = magnetic field when A is parallel to B , that is θ = 0°. So, Φ' = NABcos0 = NAB
So, ΔФ = Ф' - Ф
= 0 - NAB
= -NAB
= -Nπr²B
= -20 × π(0.1 m)² × 0.30 T
= -0.19 Wb
So, ε = -ΔΦ/Δt
= -(-0.19 Wb)/0.12 s
= 1.57 Wb/s
= 1.57 V
The induced EMF in the coil is 1.57 V
Induced EMF:The induced EMF is produced due to the changing magnetic flux through a coil. Mathematically EMF is the rate of change of flux.
E = -ΔФ/Δt
where ΔФ is the change in the magnetic flux, and
Δt is the time period
Initial magnetic flux through the coil is:
Ф = NABcosθ ,
N = 20, number of turns
A = area of the coil = πr² = 3.14 × (0.1)² = 0.0314 m²
B = 0.30 T, magnetic field
here θ = 90°
so , Ф = 0
Final magnetic flux through the coil is:
Ф' = NABcosθ, here θ = 0°, so
Ф' = 20 × 0.0314 × 0.30 × 1
Ф' = 0.1884 Wb
ΔФ = Ф - Ф'
ΔФ = -0.1884 Wb
given that Δt = 0.12s
E = -ΔФ/Δt
E = 0.1884 / 0.12
E = 1.57 V
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Athlete mesert defar runs at 10m/s. how long will it take her to go 1 minute
Answer:
600 metres
Explanation:
1 minute = 60 seconds
1 second = 10 metres
60 seconds = 60 x 10 = 600
Athlete Mesert Defar runs 600 m in 1 minute. The speed of an object is equal to the distance traveled divided by time elapsed.
What is the relationship between Speed and Distance?The speed of an object is equal to the distance traveled divided by time elapsed.
[tex]s = \dfrac dt \rm \ \ \ or[/tex]
[tex]d = s \times t[/tex]
Where,
[tex]d[/tex] - distance
[tex]t[/tex] - times = 1 minute = 60 sec
[tex]s[/tex] - speed = 10 m /s
Put the values in the formula,
[tex]d = 10 \times 60 \\\\ d = 600 \rm \ m[/tex]
Therefore, Athlete Mesert Defar runs 600 m in 1 minute.
Learn more about Speed and Distance:
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Sometimes you wish you could go back in time and fix your mistakes but you can’t you can say sorry but it’s never enough what more do they want what is a true friend it’s someone who pulls you away when something isn’t right someone who cares about you and will go out of there way to help you but I guess that dosent mattter bc apparently I’m a fake friend goodbye forever
Answer:
very true
Explanation:
u ok?
(their* not there)
But- WHOAH- You don't need to say "Goodbye forever" you could find new friends who love and support you. People say things, they do things, but they're still human, just like you are. Mistakes will be made. You just gotta fight the bad and look for a brighter future. Not everyone or everything is gonna be sunshine and rainbows. It's gonna be bumpy and rough, you just gotta work out the kinks of it and move on.
UGH PLSSSS HELP WILL GIVE BRAINLIEST, AND 20 POINTS
A nonpolar bond is formed when two atoms share electrons unequally.
Please select the best answer from the choices provided
T
F
Answer:
false
Explanation:
the answer is false bc for a non-polar bond to form the electrons are shared equally...
What is it called when a sound wave transfers its energy to a new medium?
a. Reflection
b. Transmission
c. Echo
d. Absorption
Answer:
c. eco
ya que hay trasmisión de energía de un lado al hacer ecos
What two factors affect the strength of a magnetic field
Answer:
Factors Affecting the Strength of the Magnetic Field of an Electromagnet: Factors that affect the strength of electromagnets are the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core.
Explanation:
I HOPE I HELPED :)
Abdul works at the planetarium where he is responsible for creating a show on stars. His show is entitled "A Star is Bom," and it will explain the
forces that create a star.
Abdul is creating a timeline of a star's life including its beginning, middle, and end. Abdul found a picture to include of the region around a star
before its formation begins. What does it look like?
Answer:
dust cloud
Explanation:
Stars are formed from the accumulation of the dust as well gases in the solar system. The dust and the gases collapses due to the the gravity forces and the stars are formed.
They are formed within the clouds of the dust and gases and are scattered in the galaxies. The stars are formed in a million of years from the dust clouds.
In the context, Abdul have a picture of a dust cloud which looks smoky and dusty which is the initial stage of the stars formation due to the gravity. It is the region of the star that looks like a cloud of dust before the formation of the star.
In order for us to see the red apple, where do the wavelengths of light have to go?
Answer:
Explanation:650
colour* wavelength (nm) energy (eV)
red 650 1.91
orange 600 2.06
yellow 580 2.14
green 550 2.25
Answer:
A red apple appears red because when white light illuminates the red apple all of the colors in
the white light are absorbed except the red light which is reflected. Since blue light one of the primary colors (and does not contain red light), when it illuminates a red apple the apple would appear black since there is no red light to be reflected back.
Explanation:
Which is a unit of length in the International System of units?
A inch
B. foot
C. millimeter
D. mile
Answer:
Source: National Bureau of Standards Wall Chart. 1 inch, = 25 millimetres. 1 foot, = 0.3 metre. 1 yard, = 0.9 metre. 1 mile ...
Explanation:Source: National Bureau of Standards Wall Chart. 1 inch, = 25 millimetres. 1 foot, = 0.3 metre. 1 yard, = 0.9 metre. 1 mile ...
What is the equation for impulse?
PLS AWSNER FAST AND CORRECT I WILL GIVE BRAINLEST
On this document, explain to me using your OWN WORDS how a baby’s carseat turned backwards (also called rear-facing carseat) is safer for babies in the event of a sudden stop in a vehicle. You must include the words force and inertia in your explanation. If you don’t know right away, try doing some research (watch some videos, read about infant carseat safety, etc.). This should show me that you understand how Newton’s 1st Law: Inertia works in a very real-life situation
Answer:
When a car stops suddenly, the inertia the keeps you moving forward will finally stop and give you whiplash, which could seriously injure or even kill a baby. With the seat turned back, the force will be decreased dramatically, and prevent any fatal harm.
Can someone help me answer this??
Answer:
3,2 oky na dekh Lena ek bar2,5I WILL GIVE BRAINLEST, PLZ HURRY!!!
Answer: its b because as soon as you go far away from light it get red and dents
Explanation:
what do you think explains the pattern of planet density in the solar system
Answer:
If density is greater, the object sinks. Saturn is mainly composed of the lightest two gases known, hydrogen and helium. It is the only planet in our solar system whose density is less than water
Explanation:
Planet density are uneven they all have different density.
What is density?Mass per unit of volume is referred to as density. Although the Latin letter D can also be used, the sign most frequently used for density is. Mass divided by volume is how density is mathematically defined:
If density is greater, the object sinks. Saturn is mainly composed of the lightest two gases known, hydrogen and helium. It is the only planet in our solar system whose density is less than water
Planet density are uneven they all have different density.
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In which direction does an applied force move an object?
Question 1 options:
independent of the force
in the opposite direction of the force
in the same direction as the force
perpendicular to the force
Answer:
in the opposite direction of the force
Answer:
The force applied moves the object in the direction of the force. Suppose if the force is applied to the moving object in that case object moves in the direction of the stronger force. Thus, according to the given question the applied force moves the object in its direction.
that means it's the 2nd option( in the opposite direction of the force
Which projectiles will be visibly affected by air resistance when they fall?
balloon
leaf
brick
rock
Answer:
Balloon, leaf
Explanation:
Objects that are light and have a relatively large surface that Is affected by the friction with air.
Answer:
Leaf and Baloon
Explanation:
Which type of energy transfer is responsible for the movement of magma in Earth's interior? A)conduction B)convection C)radiation D)melting
Answer:
B. Convection.
Explanation:
Convection is an energy transfer process which typically involves the transfer of heat as a result of the movement of mass. Convection is generally considered to be a more effective and efficient means of heat transport in the Earth when compared to conduction. The movement of tectonic plates is caused by the convection current because the heat gains pressure underneath the crust.
Hence, the type of energy transfer which is responsible for the movement of magma in Earth's interior is convection.
Additionally, subduction zone is a zone which represents the collision between the two (2) tectonic plates of planet earth. Subduction zone occurs in countries such as Japan, Canada, Indonesia, Russia, Alaska, and around the Pacific Ocean.
Generally, subduction zones are responsible for high intensity earthquakes, volcanoes and tsunamis around the world.
11) mWhich of the following sets of three units are all metric measurements
of length?*
A) inch, foot, yard
B) kilometer, centimeter, millimeter
C) kilogram, gram, centigram
D) kilometer, foot, decimeter
Answer:
Answer is B.
Explanation:
I hope it's helpful!