Answers
Answer:
Mass = 2154 grams
Explanation:
Given the following data;
Acceleration = 520m/s²
Force = 11.2N
To find the mass;
Force = mass * acceleration
Mass = force/acceleration
Substituting into the equation, we have;
Mass = 11.2/520
Mass = 2.154 kg
Therefore, the value of mass in grams;
1000 grams = 1 kilograms
x grams = 2.154 kilograms
Cross-multiplying, we have;
2.154 * 1000 = 2154 grams.
Mass = 2154 grams.
Therefore, the mass of the model rocket is equal to 2154 grams.
Related Questions
Between steel and iron which is more suitable for making permanent magnets electromagnet and magnetic screen give reason for your answer
Answers
Answer:
steel is suitable for making permanent magnet
as still has hi factor coercity.
iron is for electromagnet and magnetic screen as iron loses its magnetism as soon as the switch is open and a current is switched off.
Steel is better suitable for making permanent magnets than soft iron since it has higher retentivity and lower coercivity. Compared to soft iron, steel has a lower retentivity and higher coercivity. Compared to soft iron, steel is more resilient and coercive.
What is retentivity and coercivity ?Retentivity : The ability to retain the generated magnetization in a magnetic material when the magnetizing force is removedCoercivity : A measure of the ability of a material to withstand an external magnetic field without becoming demagnetized.What is Permanent magnet and Electromagnet?Permanent magnet : To be suitable for permanent magnet, material should retain its magnetism for longer time, since steel have high retentivity and coercivity . Electromagnet : To be suitable for electromagnet , material should have magnetization and demagnetizing property .
Since , steels have high remanence which means it will remain magnetized even after magnetic field is removed which is not suitable for electromagnetic . iron has high permeability so magnetization is larger and have low retentivity so that material will not retain the magnetic properties . Magnetic screen , Iron has high permeability hence it can shield better than steel
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If a machine exerts a force of 250N on an object and no work is done, what must have occurred?
Answers
value of x
Guys plz answer
and get marked as brainliest :)
Answers
Answer:
80⁰
Explanation:
triangle AOB = 180
So, a = 50
triangle CAB = a+a+x=180
CAB = 50+50+X=180
CAB = X = 180-100
X=80
HOPE IT HELPS
Answer:
Explanation:
Since OA = OB (Radius of a circle)
angle OAB = angle OBA = 50
I'm not sure what to do beyond this...
I hope this piece of information was helpful.
How to calculate the refraction of light from air to water
Answers
Answer:
hope it would be helpful
A spring with a spring constant of 40 N/m is compressed 0.15 m. How much energy is stored in the spring?
Answers
Answer: Energy is conserved.
Explanation: Energy stored in spring = Potential energy gained by object at maximum height
What happens when an object becomes cold?
Energy is added to it.
Mass is removed from it.
Cold is added to it.
Heat is removed from it.
Answers
Answer:
Heat is removed from it.
Explanation:
A object will become cold when it loses its heat to its surroundings. I would look up the 3 Principles of Heat Transfer.
I hope this helped! :)
Why is an electromagnet used instead of a permanent magnet in magnetic cranes?
Answers
Answer:
an electromagnet is a metal which has the ability to turn into a magnet on passing electricity through it .
But once the electric flow is withdrawn the circuit breaks and it no more behaves like a magnet.
but this is not so in permanent magnets
Explanation:
thus electromagnet is used in magnetic cranes bcoz their magnetism can be controlled conveniently.
According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational force depends on the masses of the objects and their distance from each other.
Many stars have planets around them. If there were no gravity attracting a planet to its star, the planet's motion would carry it away from the star. However, when this motion is balanced by the gravitational attraction to the star, the planet orbits the star.
Two solar systems each have a planet the same distance from the star. The planets have the same mass, but Planet A orbits a more massive star than Planet B.
Which of the following statements is true about the planets?
A.
Planet B is more attracted to its star than Planet A.
B.
Planet B will keep orbiting its star longer than Planet A.
C.
Planet A orbits its star faster than Planet B.
D.
Planet A has a longer year than Planet B.
Answers
Answer:
C. Plant A orbits its star faster than Plant B
Explanation:
Did it on study island
write down the expressions for the heat produced per second in a resistor in terms of current and resistance
Answers
Answer:
Heat,[tex]H=I^2 R[/tex]
Explanation:
Let H be the heat produced
Time, t=1 sec
I=Current
R=Resistance of resistor
We have to write down the expressions for the heat produced per second in a resistor in terms of current and resistance.
We know that
Heat, [tex]H=I^2 Rt[/tex]
Using the formula
Heat,[tex]H=I^2R\times 1[/tex]
Heat,[tex]H=I^2 R[/tex]
Hence, the the expressions for the heat produced per second in a resistor in terms of current and resistance is given by
Heat,[tex]H=I^2 R[/tex]
Write two characteristics of an educated society
Answers
Answer:
Different and better?
Explanation:
i dont think that helps lol
An educated person has the ability to think clearly and independently and has good judgement.
What is Education?Education is defined as purposeful activity directed towards achieving some objective, such as the dissemination of knowledge or the promotion of skills and character traits, whose aims include the development of understanding, rationality, kindness and honesty.
There are three main types of education which are as follows:
Formal, Informal and Non-formal.
The specialty of education is that it is pre-determined and pre-planned. It is regular and spatial i.e. time bound and regulated by the institutional. Proper education improves people's understanding of the world around them which make them less susceptible to the influence of others
Thus, an educated person has the ability to think clearly and independently and has good judgement.
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an object that is accelerating may be
Answers
It must be either speeding up, or slowing down, or turning. There are no other possibilities.
001)
9. A ball is rolled at a velocity of 12 m/s. After 36 seconds, it comes to a stop. What is the acceleration of the ball?
Answers
Answer:
0.33333333333
Explanation:
a = v/t
= 12/36
= 1/3
= 0.3333
Answer:
3
Explain
36/12
two homogeneous bodies of the same volume
Answers
Answer:
No, it is not necessary for them to have same mass.
Explanation:
Let both bodies have a density d1 and d2 respectively.
Since their volumes are equal V1 = V2
we know that, https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bvolume%7D
Hence, d1 = and d2 =
Taking the ratio of densities,we get
This implies that unless the bodies have same densities, the mass of the two bodies will not be same.
*Urgent*
(Part 1)
A merry-go-round rotates at the rate of 0.4 rev/s with an 99 kg man standing at a point 2.5 m from the axis of rotation. What is the new angular speed when the man walks to a point 1 m from the center? Consider the merry-go-round is a solid 73 kg cylinder of radius of 2.5 m. Answer in units of rad/s.
(Part 2)
What is the change in kinetic energy due to this movement? Answer in units of J.
Answers
Answer:
6.5 rad/s
11.695 kJ
Explanation:
Using the principle of conservation of momentum, we have
L1 = L2 and
I1w1 = I2w2, with I being the moment of inertia and w being the angular velocity.
w1 = 0.4 rev/s = 0.4 * 2π = 2.51 rad/s
Moment of Inertia, I = ½MR² + mr²
I1 = ½ * 73 * 2.5² +99 * 2.5²
I1 = 73 * 3.125 + 99 * 6.25
I1 = 228.125 + 618.75
I1 = 846.875 kgm²
The man has been said to have walked 1 m away from his position, so then
I2 = ½ * 73 * 2.5² + 99 * 1²
I2 = 228.125 + 99
I2 = 327.125 kgm²
From the formula stated above,
w2 = I1w1 / I2
w2 = (846.875 * 2.51) / 327.125
w2 = 2125.65725 / 327.125 rad/s
w2 = 6.5 rad/s
2
K = Iw²
K = 846.875 * 2.51²
K = 2125.65725 J
K'= Iw²
K' = 327.125 * 6.5²
K' = 13821.03125 J
Change in energy is given as, K' - K, so that
Energy, E = 13821.03125 - 2125.65725
Energy, E = 11.695 kJ
Work out the current through a television with a power of 0.8 kW if it uses the 230 V mains supply. Give your answer to 1 decimal place.
Answers
Answer:
the current is 3.5 A
Explanation:
The computation of the current is shown below:
As we know that
Current [A] = Electrical power [W] ÷ Potential difference [V]
Now convert KW TO W = × 1000
So, the current is
= 800W ÷ 230V
= 3.5 A
Hence, the current is 3.5 A
Eiman connects eight 12Ω lamps in series. What is
the total resistance of the circuit?
Answers
Answer:
Total resistance = 96 Ohms
Explanation:
Given the following data;
Resistance = 12 Ohms
Number of resistors = 8
To find the total resistance;
Method I.
Since the resistors are connected in series, we would simply multiply the resistance by the number of resistors.
Total resistance = 12 * 8
Total resistance = 96 Ohms.
Method II.
We would add the resistance of all the eight resistors together.
Total resistance = 12 + 12 + 12 + 12 + 12 + 12 + 12 + 12
Total resistance = 96 Ohms.
The total resistance of the circuit will be "96 Ω".
Resistance and Current:Resistance: The amount of resistance to current flow throughout an electrical circuit.
Current: The movement of electrical charge carriers such as electrons has been referred to as current. The flow of current seems to be from negative (-) to positively (+) locations.
According to the question,
Resistance = 12 Ω
No. of resistor = 8
The total resistance be:
= [tex]Resistance\times Number \ of \ resistors[/tex]
By substituting the values,
= [tex]12\times 8[/tex]
= [tex]96 \ \Omega[/tex]
Thus the above answer is right.
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pennies used to be called coppers. how do you suppose they got this nickname?
Answers
Answer:
because pennies are made from copper
Explanation:
Need help as fast as possible please
I will mark BRAINLIST only for correct answers babes :)
Thank you!
Answers
Diffuse reflection: occurs when light reflects off a rough surface and forms a blurry image or no image at all.
Similarities: they both hit the surface, but the difference is one of them give clear image the other one gives blurry image or no image at all.
Hope this helped!
which of these is NOT a metamorphic rock?
Basalt
Slate
Marble
Answers
Explanation:
Basalt is not a metamorphic rocks
If an object has a velocity of 15 m/s and a momentum of 30 kg m/s, what is its mass?
Answers
Answer:
30kgm/s/15m/s=2kg
Explanation:mass=momentum/velocity
The mass of the object is 2 kg.
What is momentum?The product of a particle's mass and velocity is its momentum. Momentum is a vector quantity, meaning it has both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on a particle equals the time rate of change of momentum.
Given that:
Velocity of the object: v = 15 m/s.
Momentum of the object: p = 30 kg m/s.
Let the mass of the object = m.
From the definition of momentum; we get:
momentum = mass × velocity
30 = 15 m
m = 2 kg.
Hence, mass of it is 2 kg.
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What is the blank? (physics)
The total energy of a system is equal to the energy added to the system plus the work and the ____ that is produced.
Answers
Answer:
Heat???
Sorry I am not at all sure
Which type of energy can be sensed by the eyes?
OA. electrical energy
B.
sound energy
OC. thermal energy
D. light energy
Answers
Answer:
light energy..
........
Answer:
light energy
Explanation: that is the only type of energy you can actually see.
2. a) A student obtained ice at 0°C from a refrigerator and placed it in a beaker on a
bench. After 4 minutes, the temperature rose to 4°C. State the changes that would be observed in the water in terms of;
(i) volume
(ii) mass
(iii) density
(b) Sketch a graph of density against temperature if the ice is warmed from 0°C to
8°C.
Answers
Answer:
2 4
Explanation:
because
Why is it safer to collide with a soft cushion than a hard surface?
Answers
Answer:
Impulse is force multiplied by time; and together, the product must be 1 unit. A collision with soft ground will result in the 1 unit of impulse by a larger time and a smaller force (compared to the small time and a large force for the hard floor).
Explain why background radiation is a mixture of contamination and irradiation
Answers
Answer:
People are exposed to sources of radiation in all aspects of everyday life. Radioactive sources can be very useful but need handling carefully to ensure safety.
Explanation:
which natural disaster comes from powerful thunderstorms that originate over land
a hurricane
b cyclone
c tornado
d typhoon
Answers
Hope this helps!
Answer:
Typhoons form over landmasses, typically after a period of very warm weather. Desert areas are known to have flash floods. Flash floods are normally widespread over large areas, rising and dissipating slowly. Violent, whirling wind that moves in a narrow path over land, forming a highly destructive funnel is called a .
Explanation:
I hope this helps and pls mark me brainliest :)
What term is defined as speed with a specific direction?
velocity
position
distance
displacement
Answers
Answer:
Velocity
Explanation:
I took the test.
The acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the
ball. This example best illustrates what law?
A.Newton's first law of motion
B.Newton's second law of motion
C.Newton's third law of motion
D.Newton's law of universal gravitation
Answers
Answer:
B. Newton's second law of motion
Explanation:
Newton's Second Law of Motion states that the acceleration of a physical object is directly proportional to the net force acting on the physical object and inversely proportional to its mass.
Mathematically, it is given by the formula;
[tex] Net \; Force = mass * acceleration [/tex]
Making acceleration the subject of formula, we have;
[tex] Acceleration = \frac {Net \; Force}{Mass} [/tex]
In this scenario, the acceleration of a baseball after it is hit by a bat depends on the mass of the ball and the net force on the ball. Thus, this example best illustrates Newton's second law of motion.
Are stairs a type of inclined plane?
Answers
Answer:
Inclined planes are simple machines used to make work easier. Ramps, ladders, and staircases are all inclined planes.
Explanation:
Answer:
imma say yes
Explanation:
The brakes of a lorry are in a poor condition
What effect will the condition of the brakes have on thinking distance and the braking
distance of the lorry?
Answers
Answer:
friction
Explanation:
Her brakes will squeak and possibly slide or skid on concrete due to her brakes.
BUT it really depends on the condition of the wheels. Now it matters on the surface as well. Has the road been eroded? what has happened with her brakes? and what texture are the wheels? can seismic waves travel through them?
Answer:
thinking distance stays the same and the braking distance increases
AQA Approved.✅
Explanation:
