The spring compresses if it is an elevator accelerating upwards at 3g is Option A. a)16x
Acceleration is the rate of change of the velocity of an item with appreciation to time. Accelerations are vector portions. The orientation of an item's acceleration is given by the orientation of the net pressure appearing on that object.
Calculation:-
Gravitational acceleration = g
Spring constant of the spring = k
Mass of the first block = m1
Compression of the spring due to the first block = X1
m1g = kX1
Mass of the second block = 4m1
Upward acceleration of the elevator = 3g
The force from the spring on the second block = F
Compression of the spring due to the second block in the elevator = X2
From the free-body diagram of the 4m1 block,
(4m1)(3g) = F - 4m1g
F = 16m1g
kX2 = 16m1g
kX2 = 16(kX1)
X2 = 16X1
Compression of the spring due to a 4m1 block placed on it in an elevator accelerating upwards at 3g = 16X1.
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the energy of a photon is 6.78 x 10-19 j. what is the wavelength of the radiation? 3.41 x 106 m incorrect response 3.26 x 10-24 m correct answer 2.93 x 10-7 m 3.41 x 10-3 m
The wavelength of the radiation is 2.93×10⁻⁷ m
Given,
The energy of photon E=6.78×10⁻¹⁹
now, E=hc/λ
λ=hc/E
=6.626×10⁻³⁴×3×10⁸/6.78×10⁻¹⁹
=2.93×10⁻⁷ m
Radiation is the emission or transmission of energy through a material medium or across space in the form of waves or particles.
According to the energy of the radiated particles, radiation is frequently classified as either ionizing or non-ionizing. Ionizing radiation has an energy level of more than 10 eV, which is sufficient to ionize atoms and molecules as well as rupture chemical bonds. Due to the significant difference in how destructive it is to living things, this is a crucial distinction. Ionizing radiation is frequently produced by radioactive substances that release radiation in the form of helium nuclei, electrons or positrons, or photons, respectively.
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You land on an unexplored foreign planet, and have with you a 2.5 tool. You determine that the force of gravity acting on the tool
is 19.5. What is the gravitational acceleration of the planet?
Based on the value of the mass of the tool and the force of gravity on that planet, the gravitational acceleration of the planet is 7.8 m/s².
What is the gravitational acceleration of that planet?The mass and force of gravity acting on a body are related by the formula given below:
Force of gravity = mass * gravitational acceleration
The mass of a body is constant but the force of gravity acting on a body or the weight of the body varies depending on the value of the gravitational acceleration.
Considering the given values:
Mass of tool = 2.5 kg
Force of gravity acting on the tool = 19.5
gravitational acceleration = force of gravity / massgravitational acceleration = 19.5 / 2.5
gravitational acceleration = 7.8 m/s²
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how much heat is lost when a 640g piece of copper cools for 375°C to 26°C? the specific heat is 0.09 cal/g°C≈
The heat energy lost during the cooling of metal can be calculated using calorimetric equation. The heat lost here during cooling of copper is 20102.4 Cal.
What is calorimetry?Calorimetry is an analytical tool used to determine the heat energy released or absorbed from a chemical reaction or physical change. The heat energy q is related to the mass m of the substance, specific heat capacity c and the temperature difference ΔT as follows:
q = m c ΔT.
It is given that the mass of copper metal is 640 g having specific heat of 0.09 Cal/g° C cooled from 375 to 26 degree Celsius. The heat lost from the metal can be calculated as follows:
q = 640 g × 0.09 Cal/g° C × (375 - 26 ° C )
= 20102.4 Cal.
Therefore, the heat lost from the metal is 20102.4 Cal.
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if there were no air resistance, how long would it take a free-falling skydiver to fall from a plane at 3100 m to an altitude of 490 m , where she will pull her ripcord? what would her speed be at 490 m ? (in reality, the air resistance will restrict her speed to perhaps 150 km/h .)
Her speed be at 490 m will be 226 m/s
What is speed?Speed is the rate at which an object moves along a path in time, whereas velocity is the rate and direction of movement. In other words, velocity is a vector, whereas speed is a scalar value. For example, 50 km/hr (31 mph (ca. 50 km/h)) describes the speed of a car traveling along a road, whereas 50 km/hr west describes the velocity.Calculation
a) initial height, [tex]h_{i}[/tex] = 3100 m
[tex]h_{f}[/tex] = 490 m
time taken, t
Using the second equation is motion
3100–490 = 0.5 × 9.8 ×[tex]t^{2}[/tex]
solving for t
t = 23.07 s
b) let the speed is u
u =[tex]\sqrt{2*g*(h_{i} -h_{f} )}[/tex]
u = [tex]\sqrt{(2*9.8 * (3100-490))}[/tex]
u = 226 m/s
Hence, her speed is 226 m/s
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Her speed be at 490 m will be 226 m/s.
What is speed?Speed is the rate at which an object moves along a path in time, whereas velocity is the rate and direction of movement.In other words, velocity is a vector, whereas speed is a scalar value.For example, 50 km/hr (31 mph (ca. 50 km/h)) describes the speed of a car traveling along a road, whereas 50 km/hr west describes the velocity.initial height,[tex]h_i[/tex] = 3100 m
[tex]h_f[/tex] = 490 m
time taken, t
Using the second equation is motion
3100–490 = 0.5 × 9.8 ×
solving for t
t = 23.07 s
b) let the speed is u
[tex]&\mathrm{u}=\sqrt{2 * g *\left(h_i-h_f\right)} \\[/tex]
[tex]&\mathrm{u}=\sqrt{(2 * 9.8 *(3100-490))}[/tex]
u = 226 m/s
Hence, her speed is 226 m/s
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A crane is shown below. It is lifting a load of 5000N. The counterweight weighs 4400N and distance y is 9m. What must distance x be if the crane is balanced? Give your answer to one decimal place.
The distance x must be 7.92 m for the crane to be balanced according to principle of conservation of energy.
What is the distance x?The distance x can be determined by applying the principle of conservation of energy as shown below.
According to this principle of conservation of energy;
the input work (energy) = output work (energy)
F₁d₁ = F₀d₀
where;
F₁ is the input forced₁ is the input distanceF₀ is the output forced₀ is the output force(4400) x (9) = 5000x
39600 = 5000x
x = 39600/5000
x = 7.92 m
Thus, the crate a balanced condition, the output work must be equal to the input work.
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Explain the relationships you see in your data tables, and whether they agree with Newton’s Second Law of Motion (Fnet=ma).
3rd and 6th row in second table do not agrees with the equation ( Force = mass * acceleration ) , rest follows the equation
There is a relation between force , mass and acceleration of the body , in a such a way that it agrees with newton's third law which is Force = mass * acceleration
All the given data in the table follows this relation except where
mass = 150 kg
a = 0.67 [tex]m/s^{2}[/tex]
F (given ) = 100 N
calculated force = ma = 150 * 0.67 = 100.5 N
mass = 300 kg
force (given) = 100 N
a = 0.33 [tex]m/s^{2}[/tex]
calculated force = ma = 300 * 0.33 = 99 N
rest of the data completely follow the equation F = ma
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Manuel was watching his younger siblings on the swing set. He had just learned about kinetic and potential energy in school. He wondered about energy's role in the back-and-forth movement of a swing. Which statement do you think explains the energy of the swing best
A.When a person is at the highest point of a swing, there is no energy, because he is not moving
B. A person has the most energy at the lowest point of the swing,because there he is moving fastest
C.The total amount of energy remains the same. It just changes from one form to another as the person swings back-and-forth.
Explain your thinking about the energy of the swing.
The total amount of energy remains the same. It just changes from one form to another as the person swings back-and-forth. Statement (C) is true.
What is energy?Energy is the ability to perform work in physics. It could exist in several different forms, such as potential, kinetic, thermal, electrical, chemical, radioactive, etc. Additionally, there is heat and work, which is energy being transferred from one body to another.
When Manuel was watching his younger siblings on the swing set; the motion of swinging is a kind of simple harmonic motion where total energy remains conserved. But kinetic and potential energy are continuously exchanged in simple harmonic motion.
Potential energy is at its peak and kinetic energy is zero when you are farthest from the equilibrium point. The kinetic energy is at its peak and the potential energy is zero at the equilibrium point. The oscillating body's kinetic and potential energy values change at other points in its motion. So, the total amount of energy remains the same. It just changes from one form to another as the person swings back-and-forth.
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find the moment of inertia of a point of mass of 0.005g at a perpendicular distance of 3m from its axis of rotation.
Answer:
Explanation:
Given:
m = 0.005 g = 5·10⁻⁶ kg
R = 3 m
__________
J - ?
J = m·R² = 5·10⁻⁶·3² ≈ 45·10⁻⁶ kg·m²
Answer:
The snapshot of idleness of given point mass still up in the air by,
Where,
- snapshot of idleness
- mass = 0.005 g = ( 0.005/1000 ) = 5 × 10⁻⁶ kg
- opposite distance = 3 m
Put the qualities in the equation,
Hence; the snapshot of idleness of given point mass is 4.5 × 10⁻⁵ kgm².
To find out about snapshot of idleness,
Explanation:
Snapshots of dormancy can be found by adding or coordinating over each 'piece of mass' that makes up an article, increased by the square of the distance of each 'piece of mass' to the hub. In vital structure the snapshot of latency is I=∫r2dm I = ∫ r 2 d m .
For a planar item, the snapshot of idleness about a hub opposite to the plane is the amount of the snapshots of dormancy of two opposite tomahawks through a similar point in the plane of the article. The utility of this hypothesis goes past that of computing snapshots of rigorously planar items.
Picture result for track down the snapshot of idleness of a mark of mass of 0.005g at an opposite distance of 3m from its hub of revolution.
What is snapshot of inactivity of an empty circle about a hub going through its middle ? Arrangement : 'I = (2)/(3) MR^(2)', where 'M' is the mass and 'R' is sweep of the empty circle.
a projector has a focal length of 10.0 cm. after focusing, the lcd object is 10.5 cm from the lens. how many cm is the image screen from the lens?
The image screen is 10.5 cm from the lens.
The focal length of the lens is 10.0 cm, so once the lens focuses, it will be 10.0 cm from the object. In order to find how many centimeters away from the lens the image screen is, we need to use trigonometry and Pythagorean theorem.
Where x is the distance between our object and our projector in meters, and y is the distance between our projector and our image screen in meters. We know that y = 10.5 cm, or 0.105 m; we also know that x = 0 meters because our object is placed directly on top of our projector (therefore it's at 0 m).
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a wooden bucket filled with water has a mass of 56 kg and is attached to a rope that is wound around a cylinder with a radius of 0.060 m. a crank with a turning radius of 0.35 m is attached to the end of the cylinder. what minimum force directed perpendicularly to the crank handle is required to raise the bucket? the acceleration of gravity is 9.81 m/s 2 . answer in units of n.
The acceleration of gravity is 9.81 m/s 2 . answer in units of n. The minimum force required was 93.20N.
What is force?
Force is a quantitative representation of an interaction that creates a change in the motion of an item. In reaction to a force, an item may accelerate, slow down, or change direction. In other words, force is any action that tends to maintain or alter the motion of a body or distort it.
Total mass=56Kg
tied radius=0.060m
turning radius=0.35m
g=9.81m/s2
T=0.35F
where F is the force that we want
W=mg
=68Kg
W(0.060)=T=0.35F
0.060/0.35=0.171
F=0.171W
0.171(56)=9.576Kg
=93.20N
So here by the force required is=93.20N
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among the four galilean satellites of jupiter (io, europa, ganymede, and callisto), which one is the biggest satellite in our solar system and which one does not have a core?
Ganymede is one of the biggest satellites in the solar system.
All four satellites have the core but the Callisto has the smallest core.
Ganymede is the only moon known to have its own magnetic field, discovered in 1996 by NASA's Galileo spacecraft. Magnetic fields cause auroras, bands of hot, electrically charged, glowing gas in the regions orbiting the Moon's north and south poles.
Callisto is his second-largest moon on Jupiter and his third-largest moon in the solar system. Its surface is the most cratered body in the solar system. An image of Callisto taken from a passing spacecraft shows bright white patches contrasting with dark areas
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A 0.1 kg ball is kicked from the edge of a cliff so that it attains a launch speed of 20 m/s at an angle of 37 to the horizontal, as shown above. On the axes below, sketch a graph of the vertical component of the ball's velocity as a function of time for the first 3 s of motion.
The graph of the vertical component of the ball's velocity is in the attachment
What is speed?Speed is the distance moved per unit time.
What is velocity?Velocity is the total displacement per unit time of an object.
How to sketch a graph of the vertical component of the ball's velocity as a function of time for the first 3 s of motion?Since a 0.1 kg ball is kicked from the edge of a cliff so that it attains a launch speed of 20 m/s at an angle of 37 to the horizontal, as shown above. To determine the vertical component of velocity,we use the equation of motion
v = u - gt where
v = final vertical component of velocity, u = initial vertical component of velocity = u'sinФ where u' = initial launch speed = 20m/s and Ф = angle above horizontal = 37°, g = acceleration due to gravity = 9.8 m/s² and t = timeSo, substituting the values of the variables into the equation, we have
v = u - gt
v = u'sinФ - gt
v = (20 m/s)sin37° - (9.8 m/s²)t
v = (20 m/s) × 0.6018 - (9.8 m/s²)t
v = 12.04 m/s - (9.8 m/s²)t
So, for the first 3 seconds, we have
for t = 0 s
v = 12.04 m/s - (9.8 m/s²) × 0 s
v = 12.04 m/s - 0 m/s
v = 12.04 m/s
for t = 1 s
v = 12.04 m/s - (9.8 m/s²) × 1 s
v = 12.04 m/s - 9.8 m/s
v = 2.24 m/s
for t = 2 s
v = 12.04 m/s - (9.8 m/s²) × 2 s
v = 12.04 m/s - 19.6 m/s
v = -7.56 m/s
for t = 3 s
v = 12.04 m/s - (9.8 m/s²) × 3 s
v = 12.04 m/s - 29.4 m/s
v = -17.36 m/s
So, we plot the graph of the vertical component of the ball's velocity using the equation v = 12.04 m/s - (9.8 m/s²)t
Find the graph in the attachment
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2. There is a bell at the top of a tower that is 45m high. The bell weighs 190N.
The bell has
energy. Calculate it:
Answer:
4,275
Explanation:
formula:1/2mv square
1/2×190×45=4,275
when there is no wind, an airplane is flying 70 m/s with its nose pointed due north. a wind begins blowing toward the west with a constant speed relative to the ground of 18 m/s. what is the direction and speed of the plane relative to the ground?
The relative velocity of the plane with respect to the ground will be 72.57 at an angle of tan⁻¹(0.25) from the north.
The speed of the airplane when there is no wind is 70 m/s in the north direction.
The speed of the wind is 18m/s related to the ground in the direction of West.
As we know, that both west and north are perpendicular to each other, the resultant speed by the observer on the ground will be observed in the direction of the resultant of both the speeds.
Let us say that we is the resultant of both the speeds,
Because the two speeds are perpendicular to each other the resultant is given by,
R = √((70)²+(18)²)
R = 72.27m/s.
The angle with north,
Tan A = 18/70
Tan A = 0.25
So, the speed of the airplane from the ground will be observed as 72.27 degrees and at an angle of tan ⁻¹(0.25) from the north.
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A man-hour is defined as "a unit of one hour's work by one person". describe how the unit of man-hour is similar to the kilowatt hour, the unit of electrical energy. then explain how the two units are different.
We can assume that man-hour is a unit of power. Both man-hour and kilowatt-hour are units for power. The difference between them is that the second one can be quantified while the first one cannot.
What is power?Power has a wide range of meanings in everyday life, but in physics, it has a very specific meaning. Power is defined to be work over elapsed time. This can be mathematically expressed as P = W/t where P is power, W is work, and t is elapsed time.
If work is done faster, the power is higher. Power is smaller when work is done slower.
The standard unit used to measure power is watt (symbolized W, not to be confused with work which is a quantity, not a unit). 1 kilowatt-hour is equal to 1,000 watts. Another widely-used unit of power is the horsepower (symbolized hp).
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a ball tied to the end of a string is being whirled around in a circle at constant speed. what can you say about the work done by the tension in the string on the ball?
The work done by the tension in the string on the ball - tension does no work at all is the correct answer.
What is tension in the string?The forces tugging on the rope from either end cause the tension in a particular strand of string or rope. Keep in mind that force is defined as mass times acceleration. If the rope is stretched tightly, any change in the mass or acceleration of the objects it is supporting will result in a change in the tension of the rope.
A force known as tension is particularly effective on medium-length materials like rope and cable that are also flexible. A gravitational force still exists in tension. When the body is traveling upward, the tension is denoted by the formula T = W + ma. The thickness is the same as T = W - ma when the body descends.
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what is the relationship between gauge pressure and true pressure? what is the relationship between gauge pressure and true pressure? gauge pressure is larger than true pressure. gauge pressure is smaller than true pressure.
The relationship between gauge pressure and true pressure is Pg + Patm = Pabs
The pressure that is relative to atmospheric pressure is known as gauge pressure. Gauge pressure is regarded to be positive for pressures above atmospheric pressure and stated to be negative for pressures below atmospheric pressure. Atmospheric pressure is used as the reference point for gauge pressure.
It is possible to define gauge pressure as the difference between absolute pressure and atmospheric pressure.
Pg + Patm = Pabs
A pressure gauge is a device used to measure the pressure exerted by a fluid, which can be liquid or gas, per unit area. This pressure is expressed in terms of Newton per square meter or pounds per square inch. Absolute pressure is denoted as Pabs, atmospheric pressure as Patm, and gauge pressure as Pg.
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an at-filled, parallel-plate capacitor has a capacitance of 1.32 pf. the separation of the plates is doubled and wax 1s inserted between them. the new capacitance is 2.57 pf. find the dielectric constant of the wax.
The dielectric constant of the wax is 4.
The energy stored in a capacitor is proportional to the square of the charge divided by the capacitance but doubling the plate spacing halves the capacitance. Capacitance is directly proportional to the electrostatic force field between the plates. This magnetic field gets stronger the closer the plates are to each other. Therefore, the capacitance increases as the distance between the plates decrease.
Therefore, we can conclude that doubling the area and distance between the plates of a parallel plate capacitor does not change the capacitance. A capacitor consists of two conductive plates separated by an insulator and is used to store an electrical charge. When you apply a voltage to a capacitor, one plate will be negatively charged and the other plate will be positively charged.
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A charging bull has a kinetic energy of 3,848 J and a mass of 267kg. How much work has to be done to stop the bull?
3848 J work has to be done to stop the bull.
The kinetic energy of an item is the energy that it possesses due to its movement. it's miles defined because the work had to accelerate a body of a given mass from relaxation to its said velocity. Having won this power in the course of its acceleration, the frame continues this kinetic energy unless its velocity adjustments.
Kinetic energy is the electricity an item has due to its movement. If we need to boost up an item, then we have to apply pressure. applying a force requires us to do paintings. After paintings have been achieved, strength has been transferred to the item, and the item may be transferred with a new consistent speed.
Calculation:-
work done = change in kinetic energy
= final kinetic energy - initial kinetic energy
= 1/2mVf² - 1/2mVi²
= 0 - (3,848 )
= 3848 J
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Light travels approximately 982,080,000 ft/s, and one year has approximately 32,000,000 seconds. A light year is the distance light travels in one year.
State the speed in mi/s, using scientific notation. (1 mile = 5280 feet exactly, by definition; i.e., this is not a measurement.)
The speed of light in miles per second (mi/s) is 186,000 mi/s.
What is the distance travelled by light in a year?The distance travelled by light in a year is known as light-year. This distance travelled by light in a year depends on the speed of light.
The speed of light in a year is given as 982,080,000 ft/s. The unit of this speed of light in feet per seconds can be converted into miles per second.
The speed of light in miles per second (mi/s) is calculated by using the following conversion factor.
1 mile = 5280 feet
982,080,000 ft/s = 982,080,000 ft/s x 1 mile/5280 ft
982,080,000 ft/s = 186,000 miles/s
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Can someone please solve and explain this for me
a) The interval with the greatest rate of change is between the points (4.9, 40) and (5.6, 50).
b) This rate in the above interval was of 14.3 m/s.
How to obtain the average rate of change of a function?The average rate of change of a function is obtained by the change in the output divided by the change in the input. Hence, over an interval [a,b], the average rate of change is obtained as follows:
[tex]r = \frac{f(b) - f(a)}{b - a}[/tex]
For each interval, the rates are given as follows:
0 sec to 1.9 sec: 10/1.9 = 5.26 m/s.1.9 sec to 3.1 sec: 10/1.2 = 8.33 m/s.3.1 sec to 4.1 sec: 10/1 = 10 m/s.4.1 sec to 4.9 sec: 10/0.8 = 12.5 m/s.4.9 sec to 5.6 sec: 10/0.7 = 14.3 m/s. -> Greatest rate.5.6 sec to 6.5 sec: 10/0.9 = 11.1 m/s.6.5 sec to 7.4 sec: 10/0.9 = 11.1 m/s.7.4 sec to 8.2 sec: 10/0.8 = 12.5 m/s.8.2 sec to 9.0 sec: 10/0.8 = 12.5 m/s.9.0 sec to 9.84 sec: 10/0.84 = 11.90.More can be learned about the rate of change at https://brainly.com/question/24313700
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what is the direction of the induced current in the loop when the loop is above the solenoid, moving downward?
The direction of the induced current in the loop will be clockwise.
What is induced current?The current brought on by the electromagnetic induction phenomena is known as the induced current.Electric power generation depends heavily on electromagnetic induction. It can be used for many things. After conducting numerous tests in his London lab for more than ten years, Michael Faraday made his discovery of electromagnetic induction in 1831.The size of the induced EMF is proportional to the rate of change of the magnetic field in which the wire is situated, according to Faraday's second law of induction.[tex]e = -N*\frac{1}{dt}[/tex]ФWhere "e" denotes the intensity of the induced emf, "Ф" denotes the quantity of magnetic flux connecting the coil, and "N" is the coil's number of turns. The induced current will flow in a direction that opposes the change in the magnetic field, according to the negative sign.To learn more about induced current, refer to
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Nuclear power plant meltdowns can be hazardous. Which of these is a result
related to the meltdown of a nuclear power plant?
O significant changes in sea level in the region
O change in weather conditions in a widespread area
O increased production in carbon dioxide as air pollution
O dangers to the health of people and the environment Science
(a) if the kinetic energy of a baseball is doubled, by what factor has its speed increased? (b) if its speed is doubled, by what factor does its kinetic energy increase?
Due to the fact that kinetic energy is proportional to the square of the speed, doubling the speed results in a four-fold increase in kinetic energy.
As a result, the object's kinetic energy doubles to become four times as much as its initial kinetic energy when its speed doubles.
Speed squared determines kinetic energy. The kinetic energy of an item increases by a factor of four with speed.
Because an object's motion is dependent on both its velocity and its mass, though velocity plays a larger role in motion.
Thus, the relationship between kinetic energy and mass and velocity is direct. Since kinetic energy is exactly proportional to both the square of velocity and mass, its value increases by an order of eight.
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a hybrid electric vehicle is submerged under water. a rescue squad member consults automotive technicians for information regarding safety precautions. technician a says that there is no danger of electrical shock from touching the body of the vehicle or the frame in or out of the water. technician b says that the vehicle will detect a ground fault and open the hv relays. which technician is correct?
All lines carrying current to and from a motor are passed through the window of a specialized current transformer known as a ground fault sensor in order to detect ground fault current.
Explain about the ground fault detected?Ground fault relays (or sensors) are used to detect ground faults with low magnitude. The control system instructs the circuit disconnect to open when the G.F. relay pick up setting is reached by the ground fault current magnitude and time.
An overvoltage relay can therefore be fitted to either directly monitor the voltage at the wye point or to detect the secondary voltage of a transformer that has been installed between the wye point and ground in order to identify the fault
No appreciable current will be created in the sensor secondary if all of the current to the motor returns through the lines in the sensor window.
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what is the magnification of an astronomical telescope whose objective lens has a focal length of 79 cm and whose eyepiece has a focal length of 2.9 cm ? follow the sign conventions.
The magnification of an astronomical telescope is -27.24 .
The magnification of a telescope is actually a relationship between two independent optical systems: the telescope itself and the eyepiece that is being used.
To determine the power, divide the focal length of the telescope (in mm) by the focal length of the eyepiece (in mm)Magnification is denoted by MMathematically it is M = -(T/E)Focal length of the telescope = T = 79 cm = 790mm
Focal length of the eyepiece = E = 2.9 cm = 29mm
M = -[tex]\frac{T}{E}[/tex]
M = -[tex]\frac{79}{2.9}[/tex]
M = -27.24
Therefore, the magnification of an astronomical telescope is -27.24.
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A hospital engineer finds an unidentified radioactive source using his Geiger counter in the nuclear medicine department. explain how the engineer could identify what type of radiation is being emitted from the source.
.
Any Idias?
Ionising radiation such as alpha and beta particles or gamma rays are detected using the Geiger-Müller (GM) tube. The radiation enters the tube through a very thin window at one end.
A radioisotope used for diagnostics must generate enough gamma rays to escape from the body and have a short enough half-life to decay away shortly after imaging is concluded. Tc-99 is the most often used radioisotope in medicine, accounting for approximately 80% of all nuclear medicine treatments.
Nuclear imaging is used to study the function of organs and tissues. During the operation, a trace amount of a radioactive chemical is used to aid in the examination. Body tissue absorbs the radioactive substance, known as a radionuclide (radiopharmaceutical or radioactive tracer).
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a 280 g bird flying along at 6.0 m/s sees a 11 g insect heading straight toward it with a speed of 30 m/s. the bird opens its mouth wide and enjoys a nice lunch. what is the bird's speed immediately after swallowing?
The bird's speed immediately after swallowing is 6.91 m/s
The conservation of momentum states that, within a few problem domains, the quantity of momentum remains regular; momentum is neither created nor destroyed, but best modified through the movement of forces as described by means of Newton's laws of motion.
Calculation:-
Mass of bird m₁ = 280 g = 0.28 kg
velocity v₁ = 6 m/s
mass of insect m₂ = 11g = 0.011 kg
velocity = 30 m/s
applying conservation of momentum considering bird and insect as a close system
m₁v₁ + m₂v₂ = m₁v₁ + m₂v₂ V
V = m₁v₁ + m₂v₂ /m₁ + m₂
= (0.28 × 6 + 0.011 × 30) / 0.28 +0.011
= (1.68 + 0.33) / 0.291
= 2.01 / 0.291
= 6.91 m/s
The regulation of conservation of momentum states that in an isolated machine the full momentum of or more bodies appearing upon each other stays regular except an outside force is applied. therefore, momentum can neither be created nor destroyed.
A 'closed device' is something that isn't laid low with outside forces. that is known as the principle of conservation of momentum. Momentum is conserved in collisions and explosions.
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four amperes of current exist in the primary coil of a transformer. the voltage across the primary coil is 120 v. what is the power output of the secondary coil?
480 W is the power output of the secondary coil.
primary coil current = ip = 4A
primary coil voltage = vp = 120v
power out put of secondary coil
p = vi
= 120v * 4A = 480W.
What is power?Power is the amount of work completed in a given amount of time. Watt (W), which is derived from joules per second (J/s), is the SI unit of power. Horsepower (hp), which is roughly equivalent to 745.7 watts, is a unit of measurement sometimes used to describe the power of motor vehicles and other devices.
The rate at which work is performed on an object is referred to as its power. Power is a temporal concept. It has to do with how quickly a task gets completed. The power equation is described below.
Power = Time + Work
P = W / t
The standard metric unit for power is a Joule/second, which is defined as the product of the standard metric units of work (the Joule) and time (the second).
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Can a spectrophotometer be used to measure the absorption of a particular wavelength of light that is not visible to the human eye?.
Yes, a spectrophotometer can be used to measure the absorption of a particular wavelength of light that is not visible to the human eye.
What is a spectrophotometer?A spectrophotometer is an instrument used to measure the intensity of electromagnetic radiation at different wavelengths.
Spectrophotometry is a standard biological technique used to measure light absorption or the amount of chemicals in a solution. This technique uses a light beam which passes through the sample, and each compound in the solution absorbs or transmits light over a certain wavelength.
Spectrophotometry is the quantitative analysis of electromagnetic spectra by use of a spectrophotometer; especially in order to determine the structure or quantity of a substance.
Using the spectrophotometer, absorption of light can be measured, even if we cannot observe it unaided.
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