Answer:
1/3 M
I hope this helps :) sorry its late
Answer:
1/3 m
Explanation:
does coefficient of thermal expansion vary with temperature?
Answer:
yes
Explanation:
Le he regalado a mi hijo un coche de plástico para que se entretenga lanzándolo por el suelo. Lo lanza a una velocidad de 12 m/s, y el coche tan solo es capaz de recorrer 9 metros hasta detenerse. Si el coche tiene una masa de 2kg. ¿Cuál es la fuerza de rozamiento?
Answer:
16 N
Explanation:
Initial speed of a car, u = 12 m/s
Finally, it stops, v = 0
The car covers a distance of 9 meters.
The mass of a car is 9 kg
We need to find the friction force. Friction force always acts in the opposite direction to the direction of motion. It is given by :
F = ma
a is the acceleration of the car. We can find it using third equation of motion as follows :
[tex]v^2-u^2=2as\\\\a=\dfrac{-u^2}{2s}\\\\a=\dfrac{-(12)^2}{2\times 9}\\\\a=-8\ m/s^2[/tex]
Net force is given by :
F = ma
[tex]F=2\times (-8)\\\\=-16\ N[/tex]
So, the force of friction has a magnitude of 16 N.
I weigh 790 N. If my feet make contact with a 303 cm2 patch of ground, what pressure do I make with the floor?
Answer:
A person's shoe has area of 44cm2 on the ground, their weight is 650N. What is their pressure (in N/cm2) A piece of glass can withstand a pressure of 21000 N/m2, what is the minimum force needed to break the glass with a special hammer of surface 3 cm by 4cm.Ice cracks if the pressure on it is more than 3000 N/m2. If a man of mass 800N wants to safely walk over the ice what area do each of his snow boots need to be in m2.
Explanation:
14. Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of
40.0 m/s.
Answer:
200,000 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 1000 \times {40}^{2} \\ = 500 \times 400[/tex]
We have the final answer as
200,000 JHope this helps you
Hello!!
Sorry to contradict the before answer, but he's wrong.
The formula is correct:
k = 1/2 * mv²
If we replace it with our data:
k = 1/2 * (1000 kg) (40 m/s)²
Here is the problem, 40^2 is = 1600, so the result is wrong:
k = 500 Kg * 1600 m²/s²
And if we resolve it:
k = 800 000 Joules
Then the kinetic energy of the roller coaster car is 800 000 Joules.
Which is an example of convection currents
Marshmallows toasting over a campfire
A pot being heated by an electric burner
Feet getting hot when stepping across sand
A radiator emitting want air and drawing in cool air
Answer:
A radiator emitting warm air and drawing in cool air is an example of convection current
Explanation:
I am guessing you meant "A radiator emitting warm air and drawing in cool air'
Answer:
A radiator emitting warm air and drawing in cool air
Explanation:
Preliteracy skills help a child:
Be ready to do math.
Be ready to sit and work in school.
Be able to listen effectively.
Be ready to learn to read.
Be ready for physical tasks, like jumping and skipping.
Answer:
Be ready to learn to read.
Explanation:
Because all of the other choices have nothing to do with literacy and literacy means reading or writing
What is the amount of energy required to raise the temperature of a 2.5 kg block of ice at
-25°C to steam at 100°C?
Answer:
to melt 2 kg of ice 835.48 KJ of heat is required.
Explanation:
i hope this helps in anyways lol
Three women push a stalled car. Each woman pushes with a 425N force. What is the mass of the car if the car accelerates at 0.85m/s2?
A wave with a frequency of 14H has a wave length of 3 meters. At what speed will this wave travel
A ball of mass 0.05 kg is strike a smooth wall normally for 4time in2 second with velocity 10 metre per second is time the ball rebounds with the same speed of 10 metre per second calculate the average force of the wall
DATA:
m = 0.05 kg
Vf = 10 m/s
Vi = -10 m/s
t = 4 times hits in 2 second
_____________________________________SOLUTION:The momentum ρ is given by,
ρ = mV
where,
m = mass
V = velocity
_____________________________________The Equation for average force is given by,
F = Δρ/Δt
where,
Δt = time taken
Δρ = change in momentum. Which is given by,
Δρ=[tex]MVf-Mvi[/tex]
Vf = final velocity which is the rebound velocity here
Vi = Initial velocity which is the velocity before striking the wall
So Substitute the equation of momentum in the equation of force
F = [tex]\frac{MVf - MVi}{t}[/tex]
_____________________________________SUBSTITUTING THE VARIABLES IN THE EQUATIONF = [tex]\frac{MVf - MVi}{t}[/tex]
F = [tex]\frac{(0.05x10) - (0.05x-10)}{2}[/tex]
F = [tex]\frac{(0.5 + 0.5)}{2}[/tex]
F = [tex]\frac{1}{2}[/tex]
F = 0.5N
__________________________________________________0.5 NEWTON is the average force on the wall_____________________________________The job of a nucleolus is to build ribosomes.
True or False
Answer:
true
Explanation:
Answer: the job of the nucleus is to actually combine into complete ribosomes not make them .
Explanation: ribosomes make protein . so the nucleuses job is to make protein .
What ideas from the American Revolution inspired leaders of the French Revolution
Answer:
The newly-formed government of the United States also became a model for French reformers. Ideas that were once just abstract thoughts – such as popular sovereignty, natural rights, constitutional checks and balances and separation of powers – were now part of an actual political system that worked
Answer:
The newly-formed government of the United States also became a model for French reformers. Ideas that were once just abstract thoughts – such as popular sovereignty, natural rights, constitutional checks and balances and separation of powers – were now part of an actual political system that worked.
I hope that helped you sorry if not-
A ball is thrown up with a speed of 15m/s. How high will it go before it begins to fall? ( g = 10m/s2 )
Answer:
Height is 11.25m
Explanation:
Given the following data;
Initial velocity, u = 0
Final velocity, v = 15m/s
Acceleration due to gravity, g = 10m/s²
To find the height, we would use the third equation of motion;
[tex] V^{2} = U^{2} + 2aS [/tex]
Where;
V represents the final velocity measured in meter per seconds. U represents the initial velocity measured in meter per seconds. a represents acceleration measured in meters per seconds square. S represents the displacement (height) measured in meters.[tex] V^{2} = U^{2} + 2aS [/tex]
Making S the subject, we have;
[tex] S = \frac {V^{2} - U^{2}}{2a}[/tex]
But a = g = 10m/s²
Substituting into the equation, we have;
[tex] S = \frac {15^{2} - 0^{2}}{2*10}[/tex]
[tex] S = \frac {225 - 0}{20}[/tex]
[tex] S = \frac {225}{20}[/tex]
S = 11.25m
Therefore, the ball will reach a height of 11.25m before it begins to fall.
describe the energy transfers of an electron around a circuit when the switch is closed
Answer:
When a switch is closed, electrons move through a circuit from the negative side of a battery to the positive side
Explanation:
Note that current is marked to flow from positive to negative on circuit diagrams, but that's for historical reasons only. Benjamin Franklin did a fabulous job of understanding what was going on, but no one yet knew about protons & electrons, so he assumed current was flowing from positive to negative.
However, what really happens is electrons flow from negative (where they repel each other) to positive (where they are attracted).
As electrons flow through a circuit, they need 'something to do'. In many cases, that something is to light a bulb or heat an element, such as an element on a stove. So, the energy of an electron can be converted to heat or light.
I hope I'm understanding your question correctly
Amya was only able to calculate her ....
Answer:
Speed
Explanation:
distance/time = speed
Can an object moving with a speed of 1000 m/s be in equilibrium? Explain
Answer:
Yes
Explanation:
A system is said to be in equilibrium when the state of the system is balanced such that there is an equal amount of powers acting in opposite direction
For an object moving at a constant speed of 1000 m/s, given that, according to Newton's first law of motion, a body will continue in motion or at rest unless acted by a force, the object continue moving indefinitely, then the motion in the object is in equilibrium or balanced or in agreement with the general external surrounding of the object.
Question 2 of 30 The government needs to provide public goods for what reason? A. They are necessary for raising the standard of living. B. Citizens demand government regulation to protect their freedom. C. Private companies cannot profit by providing them. D. The government can reduce taxes by profiting from public goods. SUBMIT
Answer:
Either C or D.
Explanation:
Either one of them.
Round 1468.12277 to the nearest whole number
12. The atmosphere is composed of five _____
Answer:
The atmosphere is composed of five layers.
Explanation:
The five layers the atmosphers is made up of are: the exosphere, the thermosphere, the mesosphere, the stratosphere, and the troposphere.
A net force of magnitude 10 N acts on a 1 kg
object.
What will be the magnitude of the object’s
acceleration?
Answer:
The answer is 10 m/s^2
Explanation:
Newtons Second Law is: F=ma
Taking into account the Newton's second law, the object’s acceleration is 10 m/s².
Newton's Second Law, also called the Fundamental Law of Dynamics, establishes the relationship that exists between the forces that act on an object and the acceleration it experiences.
This law indicates that: "The change in motion is directly proportional to the printed motive force and occurs according to a straight line along which that force is printed."
This means that the acceleration of a moving object depends on the amount of force applied to it at a given moment.
Mathematically, Newton's second law is expressed by:
F= m×a
where:
F = Force [N] m = Mass [kg] a = Acceleration [m/s²]In this case, you know:
F= 10 N m= 1 kg a= ?Replacing:
10 N= 1 kg× a
Solving:
a= 10 N÷ 1 kg
a= 10 m/s²
Finally, the object’s acceleration is 10 m/s².
Learn more about the Newton's second law:
brainly.com/question/23845187?referrer=searchResults brainly.com/question/13959891?referrer=searchResults2. A 1,100 kg car comes uniformly to a stop. If the vehicle is accelerating at -1.2 m/s ², which force is closest to the net force acting on the vehicle? (8.6A) *
Answer:
Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force whose magnitude is equal to 1320 N.
Explanation:
The force acting on the vehicle is given:
[tex] F = ma [/tex]
Where:
m: is the mass = 1100 kg
a: is the acceleration = -1.2 m/s²
We can find the magnitude of the net force:
[tex] F = ma = 1100 kg*1.2 m/s^{2} = 1320 N [/tex]
Since the car comes uniformly to a stop, the force that acts on the vehicle is the net force calculated above.
I hope it helps you!
Answer: its d because it said net force meaning the sum of the forces equaling to d
Explanation:
Help please and thank you
Answer:
A.
Explanation:
Low interest rates are better than high interest rates when borrowing money with a card or loan. Low-interest are beneficial for people who need to carry a balance from time to time, because less interest means less opportunity to slide into unmanageable debt.
B and D would be the lower interest rates.
Compound interest allows funds to grow at a faster rate than they would in an account with a simple interest rate. Compound interest include calculating the annual percentage yield, the annual rate of return or the annual cost of borrowing money. The cost of compound interest is not always apparent and if investments are not managed, making interest payments can cost money. Simple interest is calculated based on the principal amount and the earned interest is not compounded.
C gains less interest than A.
The higher the interest rate, the more money earned or the more money owed.
explain how the colors of the rainbow are formed
Explanation:
a ray of light pass through raindrops which acts like prism and split the light into its 7 constituent...which when seen by our eyes , we presume it to be a rainbow
reliable definition
Answer:
Reliable, infallible, trustworthy apply to persons, objects, ideas, or information that can be depended upon with confident certainty. Reliable suggests consistent dependability of judgment, character, performance, or result: a reliable formula, judge, car, meteorologist.
Explanation:
ANSWER ASAP
identify whether each of the following is a form of mechanical energy: elastic potential energy, chemical potential energy, gravitational potential energy.
Answer:
I'm not great at science, but I believe that the answer is elastic potential energy.
Explanation:
Components of mechanical systems store elastic potential energy if they are deformed when forces are applied to the system. Energy is transferred to an object by work when an external force displaces or deforms the object.
Please help me, this school work is not the easiest for me.
Answer:
A = mm2
M = km2
F = mg
Explanation:
8- How can you use distance and displacement to describe an objects' motion?
Answer:
Distance is a scalar quantity that refers to "how much ground an object has covered" during its motion. Displacement is a vector quantity that refers to "how far out of place an object is"; it is the object's overall change in position
Explanation:
change it up a bit if you're worried about it being copy/pasted
Write the answer in scientific notation, using the wanted unit.
(1.26 x 10^4 kg) + (2.5 x 10^6 g)
write the answer in kilograms.
Answer:
1.51 x 10^4 kg
Explanation:
(1.26 x 10^4 kg) + (2.5 x 10^6 g)
= 12600 kg + 2500000 g
= 12600 kg + (2500000 g / 1000 )
= 12600 kg + 2500 kg
= 15100 kg
= 1.51 x 10^4 kg
Can someone define 'work' for me please? I looked it up but there are a lot of different answers. The physics type, not a job :)
Answer:
in physics, work is the energy transferred to or from an object via the application of force along a displacement. In its simplest form, it is often represented as the product of force and displacement.
What was discovered in 1965 and is believed to be leftover thermal energy from the Big Bang?
A. Red shift
B. The Eagle Nebula
C. The Doppler effect
D. Background Radiation
Answer
this is what i found. it might be D
Explanation:
dunno if helps/
The Cosmic Microwave Background (CMB) are a type of electromagnetic radiation which were believed to be the remnant of thermal energy from the big bang. ... The radiation is known to be the remnant leftover of the big bang
Answer:
D
Explanation:
several sites say background radiation
