The halo of galaxy expand from the bulge out to the edge of the disk. The correct option is b.
What is universe?Universe is the whole cosmic system of matter and energy. The Earth, the Sun, the Moon, the planets, the stars along with the ,dust , gases, rocks forms the universe.
It went on expanding and stretched to grow as large as possible. It is still now expanding.
The universe consist of fully dark matter, interstellar gases or dust. The This universe began with a big bang , also known as the massive explosion. This universe is still on it way of expanding more.
The formation of stellar halos occurs naturally in a cold dark matter. Universe has halos which occurs from the bottom-up or the large structure of galaxies is formed starting with small objects.
Thus, the correct option is b.
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What is the best reason for having a strong hypothesis?
O A. It can generate public interest in science.
OB. It can help answer a scientific question.
OC. It can help reinforce common knowledge.
D. It can make a business more profitable.
Answer:
the answer is C
Explanation:
i did this
what is momentum help ASAP
Momentum is the rate of increase in speed or decrease in speed after application of force
The formula is given by
p=mvp is momentum
m is mass
v is velocity
Nepal has high potential for producing hydroelectricity however it is difficult too.
give one reason of each.
Answer:
I'm not a scholar of hydroelectric power in Nepal, so consider my answers carefully, below.
Explanation:
High Potential: Hydroelectric power comes from the potential energy stored in a mass that is above Earth's surface. As the word "hydro" implies, the mass in this case is water. Water from snow and glacier melt, and from normal precipitation (rain) in mountainous regions eventually cascades down the mountains in fast-flowing rivers or waterfalls. Often, there are lakes or man-made reservoirs to collect and store the water before it flows down. Mt. Everest is 8848 meters tall (about 29,000 feet). If a lake forms at just 2,000 meters, one can calculate the amount of energy in each kilogram of water stored in the lake that represents the potential energy available at that altitude. 1 kg of water at 2,000 meters has potential energy, PE, according to the equation: PE = mgh, where m is the mass in kg, g is Earth's acceleration due to gravity (9.8 m/sec^2), and h is height, in meters.
PE = mGH
PE = (1 kg)*(9.8 m/sec^2)*(2,000 meters) = 19,000 kg*m/sec^2
1 kg*m/sec^2 is the SI unit for 1 Joule, a measure of energy.
This potential energy can be converted into electrical energy by releasing the water so that it can flow down to a water-powered turbine that spins magnets and coils of wire that produce electricity. The 19,000 Joules of water potential energy can be converted to electrical power, less any inefficiency in the system, such as friction.
Nepal has the natural advantage in that it has many high mountain ranges with water flows that can be used for generating electrical power. The result is low operating costs (the fuel is the flowing water) and no greenhouse gas emissions
The difficulty in developing hydroelectric power in Nepal is due to the same factor that gives it an advantage: it is difficult constructing large hydroelectric plants in such rough terrain, and the power lines that are needed to transport the power to its destination are expensive and difficult to maintain and repair.
The volume in the pump when the pump piston is all the way down represents the _______
The volume in the pump when the pump piston is all the way down represents the end systolic volume.
What is systolic volume?
End systolic volume is the volume of blood in a ventricle at the end of contraction, or systole, and the beginning of filling, or diastole.
End systolic volume is the lowest volume of blood in the ventricle at any point in the cardiac cycle.
Thus, the volume in the pump when the pump piston is all the way down represents the end systolic volume.
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PLEASE ANSWER THESE FAST
AND CORRECT PLEASE
Against the park ranger's advice, a visitor at a national park throws a stone horizontally off the edge of a 86 m high cliff and it lands a distance of 89 m from the edge of the cliff, narrowly missing a visitor below.
What was the initial horizontal velocity of the rock, in m/s? You can round your answer to the hundredth place and use g ≈ 10 m/s2.
The initial horizontal velocity of the rock, in m/s is 21.241 m/s.
What is projectile?When an object is thrown at an angle from the horizontal direction, the object is said to be in projectile motion. The object which follows the projectile motion.
Time taken by the stone to reach the ground is
t = √2h/g
t = √(2x 86)/9.81
t = 4.19s
The horizontal velocity is
V(x) = Horizontal distance traveled / Time taken t
Put the values, we get
V(x) = 89 m/4.19 s
V(x) = 21.241 m/s
Thus, the horizontal velocity is 21.241 m/s
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The mercury thermometer operates on the principle of
The mercury thermometer operates on the principle of dilation.
What is the working principle of a mercury thermometer?Like all liquids, mercury expands as it is heated, so it moves along the thermometer tube, determining the temperature. Its expansion rate is calibrated on the glass scale, expansion is linear and can be accurately calibrated.
Mercury allows it to be used in a thermometer by its liquid expansion fast enough to measure something so that it still maintains an accurate measurement.
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2) A skier stands at rest and begins to ski downhill with an acceleration of 3.0 m/s² {downhill). What is
her displacement after 15.0 seconds?
Answer:
337.5m
Explanation:
Kinematics
Under constant acceleration, the kinematic equation holds:
[tex]s=\frac{1}{2}at^2+v_ot+s_o[/tex], where "s" is the position at time "t", "a" is the constant acceleration, "[tex]v_o[/tex]" is the initial velocity, and [tex]s_o[/tex] is the initial position.
Defining Displacement
Displacement is the difference in positions: [tex]s-s_o[/tex] or [tex]\Delta s[/tex]
[tex]s=\frac{1}{2}at^2+v_ot+s_o[/tex]
[tex]s-s_o=\frac{1}{2}at^2+v_ot[/tex]
[tex]\Delta s=\frac{1}{2}at^2+v_ot[/tex]
Using known information
Given that the initial velocity is zero ("skier stands at rest"), and zero times anything is zero, and zero plus anything remains unchanged, the equation simplifies further to the following:
[tex]\Delta s=\frac{1}{2}at^2+v_ot[/tex]
[tex]\Delta s=\frac{1}{2}at^2+(0)*t[/tex]
[tex]\Delta s=\frac{1}{2}at^2+0[/tex]
[tex]\Delta s=\frac{1}{2}at^2[/tex]
So, to find the displacement after 15 seconds, with a constant acceleration of 3.0 m/s², substitute the known values, and simplify:
[tex]\Delta s=\frac{1}{2}at^2[/tex]
[tex]\Delta s=\frac{1}{2}(3.0[\frac{m}{s^2}])(15.0[s])^2[/tex]
[tex]\Delta s=337.5[m][/tex]
Anita knows that she is one of the best basketball players on her team. Several colleges have been interested in recruiting her. One has offered her the opportunity to work with a specialist in biometrics once she joins the team. Anita does not think that this is really necessary since she is already a very skilled athlete. What is the BEST advice to give Anita?
A.
If everyone else on the team is doing it, she probably should too.
B.
Even the most skilled athletes can benefit from attention to biometrics.
C.
Using biometrics will help with her overall fitness but probably not her game.
D.
She probably already has all of the necessary skills since colleges are scouting her.
Anita has to pay attention to biometrics since even the most accomplished athletes may benefit from it.Option B is correct.
What is biometrics?Biometrics is the measurement of physiological traits that may be used to identify a person, including but not limited to fingerprint, iris pattern, and face features.
Anita is aware that she is one of her team's top basketball players. She has drawn interest from several colleges.
One has offered her the chance to collaborate with a biometrics expert once she joins the company. Since she is already a very accomplished athlete.
Anita does not believe that this is truly essential. The best piece of advice I can give Anita is to pay attention to biometrics since even the most accomplished athletes may benefit from it.
Hence,option B is correct.
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how are magneted fields generated?
Answer:
Moving electrons
Explanation:
The magnetic force is a force that is perpendicular to the direction of a moving charge. When two charges are not moving, the electrostatic force is along the line joining them (or the relative spacing). The effects of the static (Coulomb) force change direction due to the finite speed c, giving birth to a 'component' normal to the direction of the relative motion of the two charges (very much like the rain changing direction when you run or drive). When the speed of light c is reached, all electrostatic force becomes magnetic. When the relative separation distance is equal to zero, all forces become electrostatic. This is akin to linear acceleration (and the forces associated with it) shifting direction from being along the motion to normal to the motion as the route becomes totally round, giving birth to centrifugal forces. The magnetic force may be calculated in its general and relativistic forms using just the delayed potential form of the static Coulomb force. R3tarded potential Whereas two non-moving electrons repel electrostatically, two moving electrons can either repel or attract magnetically depending on their motion direction. When the speed of two electrons approaches c, they will generally attract with minimal likelihood of repulsion. It is also stated here that for some combinations of relative velocity and separation distances, the repulsion force can equate the attraction force, resulting in an asymptotic freedom condition in which the electrons are free from these two opposing forces. The electron possesses an inherent magnetic field, which may be mathematically represented as the outcome of a moving charge. The value and radius of the motion (the loop area) to form the magnetic dipole moment p=i a = (e v) an are not known as separate values, but only as a product p(the magnetic dipole moment), where e,v,a are the electron charge, speed, and motion loop area, respectively. The total of the magnetic field's effects equals zero for two electrons at rest with opposing polarity, known as paired electrons. This state is stable in matter because the total energy is lower. The magnetic field of a permanent magnet is the consequence of the chemical composition locking all of the lone electrons in a permanent magnetic material in their place. In a typical magnetic material, such as iron, such electrons only unify their pole orientation due to the action of an applied magnetic field. That is why adding an iron core to a coil produces a larger magnetic field. In diamagnetic materials, such alignment occurs (also governed by the chemical composition), resulting in repulsion and levitation rather than typical attraction. The velocity of electrons in wire currents is very modest, as is the generated magnetic force, because the phenomena is of second order (depends on the change of the separation distance rather than the distance itself as in the electrostatic case). However, due to the massive number of electrons involved (Avogadro number size), the magnetic force can become quite strong. The impact is amplified if you use many loops. This is used to power a large engine, for example. It is important to note that gravity is far less than magnetism, yet it may be extremely big owing to the number of particles involved—especially because gravity is always naturally orientated for attraction alone, and there is no cancellation of the gravity field by altering orientation.
1. kilogram
2. matter
3. meter
4. Sl system
standard unit of length in the SI
system
an international standardized
system of units used to communicate
scientific results
base unit for measuring mass in the
SI system
anything that has mass and
occupies space
Explanation:
1). Kilograms : base unit for measuring mass in the S.l system .2). Matter: Anything that has mass and occupies space.3). Meter: Standard unit of length in the Sl system.4). S.l system: system of units used to communicate scientific results.Hope this helps .
Good luck ✅.
write a beta decay equation for the
transmutation of a radioactive isotope of Rutherfordium, which has 104 protons
and 183 neutrons.
PLS HELP ASAP!!!!
The beta decay equation for the transmutation of a radioactive isotope of Rutherfordium has been explained above will be,[tex]\rm Re_{104}^{287} + \beta_0^{-1} \rightarrow Re_{104}^{286}[/tex]
What is the rate of decay?The reduction in the number of radionuclides per unit time is the rate of decay.
The beta decay equation for the transmutation of a radioactive isotope of Rutherfordium has 104 protons and 183 neutrons.
Atomic weight = 104+183 = 287
Atomic number = 104
The beta decay equation is;
[tex]\rm Re_{104}^{287} + \beta_0^{-1} \rightarrow Re_{104}^{286}[/tex]
Hence the beta decay equation for the transmutation of a radioactive isotope of Rutherfordium has been explained above.
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A force of 30 N is exerted on an object on a frictionless surface for a distance of 6.0 meters. If the object has a mass of 10 kg, calculate its velocity.
Answer:The velocity of the object will be 5[tex]\sqrt7[/tex]m/s or 13.23m/s
Explanation:
force exerted by the object= 30N
distance displayed by the object by the action of force=6.0m
mass of object=10kg
velocity gained by the object=?
[tex]\frac{1}{2}mv^{2}= forcexdisplacement\\\frac{1}{2}10v^{2} = 30x6\\ 5v^{2}=180\\ v^{2}= 180-5\\ v^{2} =175\\v=\sqrt{175} \\v=5\sqrt{7} or 13.23[/tex]
Which best describes the difference between internal and thermal energy?
A. Internal energy is the total potential energy in a substance, and thermal energy is the total kinetic energy in a substance.
B. Thermal energy is the total potential energy in a substance, and internal energy is the total kinetic energy in a substance.
C.Internal energy is the total potential and kinetic energies in a substance, and thermal energy is the part of internal energy that can be transferred to another substance.
D. Thermal energy is the total potential and kinetic energies in a substance, and internal energy is the part of internal energy that can be transferred to another substance.
ITS C!!!!!!!!!!!!!!!
.Internal energy is the total potential and kinetic energies in a substance, and thermal energy is the part of internal energy that can be transferred to another substance. Thus, option "C" is correct.
What is the thermal energy Meaning?Thermal energy, is internal energy present in a system in a form of thermodynamic equilibrium probity by its temperature.
Thermal energy cannot be transformed to useful work as easily as the energy of systems that are not in conditions of thermodynamic equilibrium.
Thus, option "C" is correct
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What is the smallest time interval in which a 5.7 T magnetic field can be turned on or off if the induced emf around the patient's body must be kept to less than 0.12 V ?
The smallest time interval in which the magnetic field can be turned on or off to induced the emf is 47.5 s.
Emf induced in the coil
The emf induced in the coil is calculated as follows;
emf = dФ/dt
where;
dФ is change in fluxdt is change in time0.12 = 5.7/dt
dt = 5.7/0.12
dt = 47.5 s
Thus, the smallest time interval in which the magnetic field can be turned on or off to induced the emf is 47.5 s.
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as the mass of the central star increases, the distance to the habitable zone __________ and the size (width) of the habitable zone __________.
As the mass of the central star increases, the distance to the habitable zone increases and the size (width) of the habitable zone increases.
How the does the size and mass of a star affect its habitable zone?A star is a large luminous object found in space which produces heat and light energy as well as electromagnetic radiation.
The habitable zone of a star is the zone or area where liquid water can be found.
The distance habitable zone of a star increases with increase in mass of the star.
Therefore, as the mass of the central star increases, the distance to the habitable zone increases and the size (width) of the habitable zone increases.
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Which is the most accurate description of how the coolant works in an engine?
Coolant absorbs thermal energy.
Combustion absorbs thermal energy.
Coolant absorbs chemical energy.
Combustion absorbs chemical energy.
Answer:
Coolant absorbs thermal energy
Explanation:
Since the coolant is used to refrigerate the engine, it have to absorb the thermal energy
1. George is traveling to Boston from Springfield. Springfield is 144
kilometers from Boston. If speed-(distance)/(time), how fast was he
going if it took him 3 hours to get to our state capital?
Answer:
48 kilometers per hour
Explanation:
144/3 = 48 km/h
4.Which of the following is the best description of combustion. Combustion is when you ___________________.
A. Use carbon dioxide and light energy to make oxygen and heat energy.
B. Use oxygen to convert a fuel to heat and light energy.
C. Use carbon dioxide and a fuel to produce water vapor and energy.
D. Use oxygen and a sugar to make energy and carbon dioxide.
Answer:
B. Use oxygen to convert a fuel to heat and light energy.
What is combustion?
Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer.
The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid.
For example, charcoal is combining with oxygen.
Combustion is commonly called burning, and the substance that burns is usually referred to as fuel.
To summarize,
For combustion to occur three things must be present:
a fuel to be burned.a source of oxygen a source of heat.As a result of combustion, exhausts are created and heat is released. You can control or stop the combustion process by controlling the amount of the fuel available, the amount of oxygen available, or the source of heat.
Therefore,
Combustion is when you use oxygen to convert a fuel to heat and light energy.
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A velocity-time graph can give you
A. Displacement of the moving object
B. Acceleration, displacement, and velocity.
C. Velocity of the moving object
D. Acceleration of the moving object
Answer:
A). Velocity time graph gives displacement..The area under V-t graph gives displacement.
More to know -
Velocity = speed/ time
it's speed with direction.
acceleration = rate of change of velocity
A velocity-time graph provides information about the motion of an object over time Acceleration, displacement, and velocity. The correct option is option (B).
Acceleration: The slope of the velocity-time graph represents the object's acceleration. A positive slope indicates positive acceleration (speeding up), a negative slope indicates negative acceleration (slowing down or decelerating), and a flat line indicates zero acceleration (constant velocity).
Displacement: The area under the velocity-time graph represents the displacement of the object. By calculating the area between the graph and the time axis, we can determine the total displacement.
Velocity: The graph directly shows the object's velocity at different points in time. The vertical position of the graph at any given time represents the object's instantaneous velocity.
Therefore, a velocity-time graph can provide information about the acceleration, displacement, and velocity of the moving object. The correct option is option (B).
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A car accelerates at a rate of 8.8 m/s² with a force from the tires of 15,840 N.
What is the mass of the car?
Answer:
1,800kg
Explanation:
Force = Mass x Acceleration
F = m x a
15840N = m x 8.8
8.8 x m = 15840
m = 15840/8.8
= 1,800kg
Answer:
[tex]\displaystyle 1800\:kg.[/tex]
Explanation:
[tex]\displaystyle am = F_{net} \\ \\ \frac{15840}{8,8} = \frac{8,8m}{8,8} \\ \\ \boxed{1800 = m}[/tex]
I am joyous to assist you at any time.
force of 5000N is acting on a body of mass 50kg if force of friction on the body is 100N. Calculate how long it takes for the body to gain the velocity of 50m/s from rest
Answer:
.5102 s
Explanation:
Net force acting to accelerate the body is 5000- 100 = 4900 N
F = ma
4900 N = 50 kg * a then a = 98 m/s^2
v= at
50 m/s = 98 m/s^2 t then t = 50/98 =.5102 s
When is a secondary source more helpful than a primary source?
A. When you want to know the exact data values
B. When you do not need to know the conclusion of the experiment
C. When you do not need many details about the experiment
D. When you are an expert in the field being studied in the experiment
Answer:
I think the answer is C.
Explanation:
A primary source is a first hand account of an event while a secondary source is a retelling or second hand account meaning as many details will be prevalent.
in permanent waving, the size of the curl is determined by the
In permanent waving, the size of the curl should be determined based on the size of the rod.
What is permanent waving?Permanent waving can be defined as a hairstyle that is typically made by setting a person's hair in waves or curls while treating it with chemical solutions such as thio, so as to make it last for a long period of time.
In permanent waving, the size of the curl should be determined based on the size of the rod that would be used for the hairstyle.
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If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would
If an object is neutrally buoyant (does not sink or float) in fresh water, the same object placed into salt water would float.
What is Buoyancy?Buoyancy is the force through your fluids or total or submerged bodies. Also known as Archimedes' theorem. The fluid of the direction on the body produces a resultant force but with the direction of the weight, with the opposite direction, upwards.
In this case, we have salt water that is denser, allowing almost no objects to sink, so the buoyant force is greater that acts on the object.
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Explain the meaning and use of the following acronyms: HELIOS, Exo-FMS, HAZMAT, NIRSpec.
Answer:
HELIOS- The god of the sun in
HAZMAT-Hazardous materials
NIRSpec- Near Infrared Spectrograph
Explanation:
The acronyms will be:
HELIOS: personification of the SunExo-FMS: EXO flexible manufacturing ystemHAZMAT: hazardous materialsNIRSpec.: Near-infrared spectroscopyHow to explain the acronyms?HAZMAT is an abbreviation for “hazardous material that is the substances in quantities or forms that may pose a reasonable risk to health, property, or the environment.
Near-infrared spectroscopy (NIRS) is a brain imaging method that measures light absorbance to calculate oxy-hemoglobin (oxy-HB) and deoxy-hemoglobin.
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What are two models of light? how does each model explain part of the behavior of light?
The two most successful theories of light were the corpuscular (or particle) theory of Sir Isaac Newton and the wave theory of Christian Huygens. Newton's corpuscular theory stated that light consisted of particles that travelled in straight lines.
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The satellites of Jupiter, Ganymede and Europa, orbit the planet in 7.1 days and 3.5 days. About what is the ratio of the orbit period of Europa to Ganymede expressed as a simple fraction involving the numbers 1,2,3 or 4 in the numerator or denominator
Answer:
1/2
Explanation:
Europa = 3.5 days
Ganymede = 7.1 days
E/U = 3.5 / 7.1 ~~ 1/2
modern observations have shown that the geometry of the universe is ____.
Modern observations have shown that the geometry of the universe is flat and the universe mist be infinite.
What is geometry?Geometry refer to a branch of mathematics that encapsulates measurements of lines, shapes, dimensions, points and shapes.
Therefore, Modern observations have shown that the geometry of the universe is flat and the universe mist be infinite.
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A ball is thrown vertically upward with an initial speed of 50 m/s. if air resistance does affect motion, then what would be its speed upon returning to its starting point?
Answer:
your answer would 50 m/s I do believe
The correct answer for the speed of the ball upon resting to it's starting point is [tex]50[/tex] m/s.
Given:
Initial speed: [tex]u = 50[/tex] m/s
To calculate the speed upon resting position, Calculate the time requires to reach starting position:
Time required to reach starting point = 2 * (Time require to reach the maximum height)
Time required to reach the maximum height:
[tex]v = u+(-a )t[/tex]
Final velocity([tex]v[/tex]) is [tex]0[/tex] m/s.
Negative sign indicates negative acceleration:
[tex]t= \dfrac{50}{9.8}\\\\ = 5.10[/tex]seconds
Time for start point = [tex]2 * 5.8[/tex]
[tex]=10.6[/tex] seconds
From equation of motion:
[tex]v= u+at[/tex]
[tex]= 50 -9.8* 10.2[/tex]
[tex]= -50.2[/tex] m/s
Negative sign indicates downward direction.
Speed when ball return is is [tex]50[/tex] m/s.
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