Please answer two of the following questions. Remember,
completeness and accuracy are important and will be used to
determine you grade! Make sure to read the rubric!!
Describe neutron stars, includi
Answers
Neutron stars are so dense that a sugar-cube-sized piece of neutron star matter would weigh around 100 million tonnes. Pulsars are a type of neutron star that emits electromagnetic radiation. They have a radius of about 10 km, but their mass is around 1.4 times that of the Sun. When neutron stars rotate, they emit radiation that is visible in the radio frequency range. Pulsars spin rapidly, emitting radiation in a regular pattern that can be detected and studied.
Relativity and its unusual properties. Time and space are relative and depend on the speed of the observer. Some of the unusual properties of relativity include time dilation, length contraction, and mass-energy equivalence.Time dilation occurs when time appears to pass more slowly for objects in motion than for objects at rest. Length contraction means that an object appears to be shorter when it is moving than when it is at rest. Mass-energy equivalence is the idea that mass and energy are equivalent, and that matter can be converted into energy.
Three interesting things about black holes
Black holes are regions of space where gravity is so strong that nothing, not even light, can escape.Black holes can form when massive stars run out of fuel and collapse under the force of their own gravity.Black holes can have different sizes and properties, depending on their mass and spin.They can be classified as stellar, intermediate, or supermassive black holes.
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Related Questions
what is the relationship between force, velocity, and mass?
( try to make it detailed and a 8th grade level ish.)
Answers
Answer:
The slower the intended velocity, the closer the force expressed comes to equalling the linear inertia of the load (i.e. the amount of force needed to hold the weight motionless). From Equation 1, force is inversely proportional to time
Answer:
It states that the time rate of change of the velocity
An aeroplane flies in a vertical circular path of radius 200m at a constant speed.The passengers feel weightless just above the floor when the plane is at the top of a circular path.a)At what speed must the plane be travelling?b)Explain why the passengers feel weightless?.c)if the plane travelled along the same path with a higher velocity,what would happen to the passengers?
Answers
The speed of the airplane at the top point during the circular motion is 44.27 m/s.
The passengers feel weightless, because they are experiencing a free fall at that point.
Radius of the circular path, r = 200 m
Acceleration due to gravity, g = 9.8 m/s²
The passengers feel weightless just above the floor when the plane is at the top of the circular path, because they are experiencing a free fall at that point.
So, the centripetal force is given by,
mv²/r = mg
v²/r = g
Therefore, the speed at the top point is,
v = √rg
v = √(200 x 9.8)
v = √1960
v = 44.27 m/s
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HEY CAN ANYONE ANSWER DIS PLS!!!
Answers
Answer:
Multiplied.
Explanation:
I have a positive feeling about my answer. If I'm wrong, I am terribly sorry!!!
Answer:
B. Subtract
Explanation:
To multiply two numbers in scientific notation, multiply their coefficients and add their exponents. To divide two numbers in scientific notation, divide their coefficients, and subtract their exponents. In either case, the answer must be converted to scientific notation.
I hope this helped!
So Which is studied by physical scientists?
animals
Answers
Answer: zoologist
Explanation: hope this helps!!
An ocean wave usually occurs at a frequency of 0.2 Hz. What is the period of each wave.
Answers
5 seconds
Explanation
A wave is a disturbance in a medium that carries energy without a net movement of particles, the frequency is the number of waves that pass a fixed point in unit time
it is written as:
\(\begin{gathered} frequency=\frac{number\text{ ofwaves\lparen1\rparen}}{time\text{ \lparen second\rparen}} \\ \frac{1}{s}=\text{ 1 Hert \lparen1Hz\rparen} \\ the\text{ unit ofr frequency is hertz} \end{gathered}\)and the wave period is the time it takes to complete one cycle ,it is inversely proportional to the frequency of a wave, we can find the period using the formula
\(\begin{gathered} Perido\text{ \lparen T\rparen=}\frac{1}{Frequency(f)} \\ T=\frac{1}{f} \end{gathered}\)Step 1
given:
\(Frequency\text{ =0.2 HZ}\)now, replace in the formula
\(\begin{gathered} T=\frac{1}{f} \\ T=\frac{1}{0.2\text{ HZ}} \\ T=5\text{ seconds} \end{gathered}\)therefore, the Period is 5 seconds
I hope this helps you
What is the wavelength of a sound wave if the air is 20 degrees Celsius, and the frequency is 100 Hz?
Question 9 options:
41. 16 m
3. 52 m
None of these.
3. 43 m
2000 m
Answers
The wavelength of a sound wave at 20 degrees Celsius and a frequency of 100 Hz is approximately 3.4 meters.
Sound waves are mechanical waves, which means they require a medium to propagate. In the case of sound waves, this medium is usually air. The speed of sound in air depends on various factors, including temperature, humidity, and pressure. At 20 degrees Celsius, the speed of sound in air is approximately 343 meters per second.
The wavelength of a sound wave is defined as the distance between two successive points in the wave that are in phase, or the distance over which the wave repeats itself.
It is determined by dividing the speed of sound by the frequency of the wave, using the formula λ = v/f, where λ is the wavelength, v is the speed of sound, and f is the frequency of the wave.
Substituting the values of v and f given in the question, we get λ = 343/100, which simplifies to approximately 3.4 meters. Therefore, the wavelength of the sound wave in this scenario is approximately 3.4 meters.
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A playground slide is inclined 40°. If a boy with a mass of 32 kg slides down for -3meters. How much work is done by gravity on the boy?
Answers
Answer:
the work done by gravity on the boy is 604.62 J
Explanation:
Given;
distance the boy slides, d = 3 m
angle of inclination of the playground, θ = 40⁰
mass of the boy, m = 32 kg
The vertical height, h, above the ground through which the boy falls represents the height of the triangle which is the opposite side.
The distance through which the boy slides, d, represents the hypotenuse side of the right triangle.
\(sin \theta = \frac{opposite }{hypotenuse} \\\\sin \theta = \frac{h}{d} \\\\h = dsin\theta\\\\h = 3 \times sin(40^0)\\\\h = 1.928 \ m\)
The work done by gravity on the boy is calculated as;
W = P.E = mgh
= 32kg x 9.8m/s² x 1.928m
= 604.62 J
Therefore, the work done by gravity on the boy is 604.62 J
PLS FAST WILL GIVE BRAINLIEST Describe why atoms can be neutral when they contain charged subatomic particles.
Answers
Answer:
Atoms are neutral if they have the same number of charged protons and electrons, balancing positive and negative charges. As long as the numbers of electron and protons are the same, the charges will balance.
A lamp that plugs into a wall socket draws energy which flows through a thin wire in the bulb causing it to glow. What energy transformation are taking place
Answers
Answer:
Electrical>thermal>light
Explanation:
wave motion that is parallel to wave direction describes a_ wave
Answers
A longitudinal wave is a wave in which the motion of the medium's particles is parallel to the wave's direction of propagation.
What is the name of a parallel wave?Longitudinal waves are waves in which the displacement of the medium is in the same (or the opposite) direction as the wave propagation and the medium vibration is parallel ("along") to the direction the wave travels.
What wave moves parallel to another?Two categories of mechanical waves exist: In longitudinal waves, the movement of the particles is parallel to the motion of the energy, meaning that the medium is displaced in the same direction as the wave.
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Water is a powerful solvent because it is a polar molecule true or false
Answers
Answer:
True
Explanation:
Current
A) is the flow of voltage along a conducting path and is mesured in volts
B) is the flow of charges along a conducting path and is
measured in amperes
Answers
Current is the flow of charges along a conducting path and is measured in amperes. So the correct option is B.
Current is the flow of electric charge along a conducting path, typically in the form of electrons moving through a wire or other conductive material. The unit of current is the ampere, which is defined as the flow of one coulomb of charge per second. It's abbreviated as "A".
Voltage, on the other hand, is the electrical potential difference between two points in a circuit or electrical system. It's measured in volts and represents the force that drives the flow of current. Voltage is often compared to the pressure in a water pipe - just as water will flow from a high-pressure area to a low-pressure area, electrical charge will flow from a high-voltage area to a low-voltage area.
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a 90 kg fullback running east with a speed of 5.00 m/s is tackled by a 95.0 kg opponent running north with a speed of 3 m/s. if the collision is perfectly inelastic, calculate the speed and direction of the players just after the tackle and determine the mechanical energy lost as results of the collision. account of the missing energy
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TRUE / FALSE. which of the following are equivalent to 652 mmhg? select all that apply.
Answers
None of the given options (a, b, c) are equivalent to 652 mmHg.
To determine which of the following options are equivalent to 652 mmHg, we need to compare them and check if they represent the same pressure value. Here are the options:
a) 871 Pa
b) 0.881 atm
c) 17.89 psi
To determine if any of these options are equivalent to 652 mmHg, we can use the following conversion factors:
1 atm = 760 mmHg
1 psi = 51.71 mmHg
1 Pa = 0.0075 mmHg
Now, let's check each option:
a) 871 Pa:
To convert mmHg to Pa, we can use the conversion factor of 1 Pa = 0.0075 mmHg.
652 mmHg × 0.0075 Pa/mmHg ≈ 4.89 Pa
The value of 871 Pa is not equivalent to 652 mmHg, so this option is not correct.
b) 0.881 atm:
To convert mmHg to atm, we can use the conversion factor of 1 atm = 760 mmHg.
652 mmHg ÷ 760 mmHg/atm ≈ 0.858 atm
The value of 0.881 atm is not equivalent to 652 mmHg, so this option is not correct.
c) 17.89 psi:
To convert mmHg to psi, we can use the conversion factor of 1 psi = 51.71 mmHg.
652 mmHg ÷ 51.71 mmHg/psi ≈ 12.61 psi
The value of 17.89 psi is not equivalent to 652 mmHg, so this option is not correct.
In conclusion, none of the given options (a, b, c) are equivalent to 652 mmHg.
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1)
How much time does it take to lift a box using 18.0 J of work and 20.89 Watt of power?
Answers
Answer:.
Explanation:
Z
From the mass-luminosity relation we can conclude that Group of answer choices all stars have the same ages. all stars have equal life spans. none of the above. the more mass a star has, the shorter its main sequence life. the more mass a star has, the longer its main sequence life.
Answers
The more a star has, the shorter its main sequence life. "The mass-luminosity relation, which is used to describe the relationship between a star's mass and its luminosity, tells us that the more massive a star is, the brighter it is.
However, the mass of a star also determines how long it spends on the main sequence. A star spends most of its life in the main sequence, a stage during which it fuses hydrogen in its core to produce helium. The amount of time a star spends on the main sequence is determined by its mass, with more massive stars having shorter lifetimes than less mass stars.
As a result, the more massive a star is, the shorter its main speed life, which means that option D, "the more mass a star has, the shorter its main sequence life," is the correct answer. The other options, "all stars have the same ages," "all stars have equal life spans," and "none of the above," are all incorrect because they do not accurately describe the relationship between a star's mass and its main sequence lifetime.
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Identify the career that matches the description.
Runs the front desk at a hotel or motel: Hotel/Motel Clerk
Oversees other employees at a hotel or motel: Hotel/Motel Supervisor or Manager
Cleans the interior of buildings: Housekeeper/Cleaning Worker
Helps guests at places of lodging with personal services: Concierge
Handles luggage for travelers: Porter/Bellhop
The answers to them are in each line behind the :'s.
Answers
Answer: 1.Hotel/Motel Clerk 2.Hotel/Motel Supervisor or Manager 3.Housekeeper/Cleaning Worker 4.Concierge 5.Porter/Bellhop
What is profession?
A successfully professionalized field of employment is referred to as a profession.
It can be characterized as a disciplined team of people, professionals, who uphold ethical standards, present themselves as, and are recognized by the public as possessing, special knowledge and skills in a widely acknowledged body of learning derived from research, education, and training at a high level, and who are prepared to apply this knowledge and exercise these skills in the interest of others.
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What does a simple pulley do?
A. It makes you have to pull harder on the rope.
B. It increases the force.
O O O O
C. It redirects the force.
D. It makes the load heavier.
Answers
Answer:
C. It redirects the force
A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has ___________energy. Calculate it.
Answers
Answer:
8.9*10^5
Explanation:
as we know that
K.E =1/2 mv²
where m is mass and v is velocity
given mass= 1120 kg
given velocity =40 m/s
so K.E=1/2 (1120)(40)²
K.E=1792000/2
K.E=896000
K.E=8.9*10^5
Answer:
8.9* 10^5
Explanation:
How much net force must Mrs. McD’s 30,000 kg jet plane develop to achieve an acceleration of 1.5 m/s2?
Answers
Answer:
F = 45000 [N]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
ΣF = m*a
Where:
F = force [N] (units of Newtons)
m = mass = 30000 [kg]
a = acceleration = 1.5 [m/s²]
\(F = 30000*1.5\\F = 45000 [N]\)
the brakes applied to a car produces an acceleration of 6m/s^2 in the opposite direction to the motion. if the car takes 2s to stop after the application of brakes. calculate the distance it travels during this time .
Answers
Answer:
acceleration= -6ms^-2
Explanation:
\(v = u + at \\ 0 = u + ( - 6 \times 2) \\ u = 12m {s}^{ - 1} \)
distance
\(s = ut + \frac{1}{2} a {t}^{2} \\ s = 12 \times 2 + \frac{1}{2} \times ( - 6) \times {2}^{2} \\ s = 12m\)
therefore distance = 12mwhat is the source of energy that directly drives atp synthase in its production of atp?
Answers
The sun's thermal energy serves as the primary energy source for producing atp during the photosynthesis process. Essentially, it serves as the primary catalyst for all metabolic processes in plants. Protons diffusing through the F0 section of ATP synthase
What is adenosine triphosphate?All living things contain the energy-carrying molecule adenosine triphosphate (ATP) in their cells. When food molecules are broken down, chemical energy is released that is captured by ATP and used to power other cellular operations.
To drive metabolic events that would not happen naturally, to transfer necessary molecules across membranes, and to do mechanical labor, such as moving muscles, cells need chemical energy.
Chemical energy cannot be stored by ATP; lipids and carbohydrates such as glycogen serve this purpose. ATP is created when energy from storage molecules is required by the cell.
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What is the thoery of Newton?
Answers
Answer:
apple fall on his head, then he discovers gravity. Law of motion
Explanation:
Answer:
gravity is the theory of Newton.
Explanation:
The reason for this is because one day he was sitting under the apple tree and an apple fell on top of his head. So he wanted to figure out what had caused the apple to fall on his head.
The Coulomb force between two charges q1 and q2 at separation r in air is F. If half of the separation is filled with medium of dielectric constant 9, what will be the value of new coulomb force?
Answers
Answer:
The new Coulomb force is q₁q₂/9πε₀r²
Explanation
The coulomb force between the two charges q₁ and q₂ at a distance r in air is given by F = q₁q₂/4πε₀r².
Now, let us assume the material of dielectric constant κ = 9 is placed between them on the side of the q₁ charge. The value of its effective charge is now q₃ = q₁/κ at a distance of d = r/2 from the q₂ charge.
Since we have air between q₂ and q₃, the coulomb force between them is
F' = q₂q₃/4πε₀d²
= q₂(q₁/κ)/4πε₀(r/2)²
= 4q₂q₁/κ4πε₀r²
= 4/κ(q₂q₁/4πε₀r²)
= 4/9 × (q₂q₁/4πε₀r²)
= q₁q₂/9πε₀r²
So, the new Coulomb force is q₁q₂/9πε₀r²
A vehicle starts from rest and accelerates uniformly for 12 seconds to a
velocity of 10ms1. It then runs at a constant velocity and is finally came to rest
in 66m with constant . The total distance covered by the vehicle is
580m. Find the value of acceleration and the time taken.
Answers
The value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.
Acceleration of the vehicleThe acceleration of the vehicle before coming to rest is calculated as follows;
v² = u² + 2as
where;
v is the final velocityu is the initial velocitya is the accelerations is the distance traveled before stoppingthe car came to rest with constant velocity attained after 12 seconds.
the initial velocity of the car before 12 seconds is zero.
v² = 0 + 2as
a = v²/2s
a = (10²)/(2 x 66)
a = 0.76 m/s²
Time of motion of the vehicled = ut + ¹/₂at²
where;
d is the total distance traveledt is the time of motiona is accelerationu is initial velocity of the vehicle580 = 0 + ¹/₂(0.76)t²
580 = 0.38t²
t² = 580/0.38
t² = 1,526.3
t = √1,526.3
t = 39 seconds
Thus, the value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.
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Can anyone tell the answer
Answers
more force will be needed to stop a skater if they have ___mass, ___ momentum, or ___stopping distance
Answers
More force will be needed to stop a skater if they have more mass, more momentum, or a shorter stopping distance.
Mass: A skater with a higher mass will have greater inertia, meaning they will require more force to change their motion (stop in this case).
Momentum:
Momentum is the product of mass and velocity.
A skater with more momentum will need a greater force to stop since momentum needs to be reduced to zero for the skater to come to a complete stop.
Stopping distance:
A shorter stopping distance means that the force applied to stop the skater must be greater in order to quickly decelerate the skater and bring them to a stop within the shorter distance.
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Look up how much power a typical light bulb uses/produces. Then look up how much power a typical microwave uses/produces. How do these appliances compare to your physical activities?
Answers
The current drawn by a microwave is greater than the amount of current used by an electric bulb, hence the microwave consumes more power.
Energy dissipated by electrical applianceThe amount of energy dissipated by an electrical appliance is the calculated using the following formulas;
P = I²R
where;
P is powerI is currentR is resistanceThe current drawn by a microwave is greater than the amount of current used by an electric bulb, hence the microwave consumes more power.
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Convert 5 (mi/hr) to [m/s]
Answers
Answer:
2.2352 m/s
Explanation:
divide the number of meter in a mile by the number of second in an hour
Acceleration is the change of velocity over some
time. Is it true or false