Mass of the given volleyball was 0.32 kg.
What is delivered impulse?Impulse is a measure of instantaneous change. The total momentum of an object is determined from the total change in object mass and object velocity.
Since momentum is equal to the delivered impulse,
J = m (v- u)
Where,
J = impulse delivered (-9.3kg m/s)
u = Initial speed of the ball (4.2 m/s)
v = Final speed of the ball (-24 m/s)
m = mass of the object
-9.3 = m (-24 - 4.2)
-9.3 = m × -28.2
m = 9.3 ÷ 28.2
m = 0.32 kg
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what does a profilometer do? question 11 options: measures the wavelengths of light emitted or absorbed by an object separates items for chemical analysis uses a laser to measure the heights and depths of toolmarks allows the examiner to see the evidence toolmark and the reference toolmark simultaneously
An instrument called a profilometer is used to gauge a surface's profile and surface finish.
What is a Profilometer & Why is it Used?A profilometer is a tool used to gauge a surface's profile and polish. Surfaces on a small scale can be made up of a series of peaks and valleys that vary in height, depth, and spacing. The surface's ability to create a seal, look glossy or matte, feel smooth or rough, or be used as a wear surface depends on minute variations in these characteristics. Surface roughness or surface finish specifications are frequently specified on technical drawings in industries that manufacture mechanical parts, and profilometers are used to confirm that the specifications have been met.The method of profilometry is used to extract topographical information from a surface.To Learn more About profilometer refer to :
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One group approached their investigation by dropping a mass so it fell
vertically downward. They planned to measure the position of the mass as it
descended using a motion detector. They checked whether the motion
detector that they were using was sensitive enough to capture the motion
during the fall, and they were satisfied.
Given that they are measuring the motion (position, velocity, and
acceleration) of the mass, the students can only measure gravitational
potential energy and kinetic energy; any other form of energy is
undetectable. If they hope to see that energy is conserved in this system,
which of the following assumptions must be true (or approximately true)?
Air resistance is negligible. This must be
true.
The initial vertical velocity of the mass is negligible. [Select ]
It's true that air resistance is really low. Energy must not be gained or lost during the experiment if they expect to demonstrate that energy is conserved. In other words, there must be little loss from air resistance.
Describe the mechanism of air resistance.Air is the source of the force known as air resistance. An object travelling through the air experiences the force in the opposite direction. A sports vehicle with a streamlined form will face less air resistance than a lorry with a flat front, enabling the latter to travel faster.
The force of air resistance changes depending on the velocity. This implies that the acceleration is not constant and neither is the force. That is a serious issue.
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fixing the brakes on your bicycle, you have the bicycle turned upside down. to test the brakes, you spin the wheel to a high speed in a counter-clockwise direction from your perspective. what is the direction of the angular displacement of the wheel?
The direction of the angular displacement of the wheel is -Toward you.
What does angular displacement refer to?The definition of angular displacement is "the angle, expressed in radians (degrees, revolutions), through which a point or line has been rotated in a particular sense about a certain axis." It is the angle at which a body travels around in a circle.
A vector quantity, angular velocity has both a magnitude and a direction. The direction matches the direction of the angular displacement, which is where we derived the angular velocity.
The rate at which angular velocity changes over time is referred to as angular acceleration. Typically, it is stated in radians per second per second. As a result, d = d t. The term "rotational acceleration" also applies to the angular acceleration.
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Question 3 of 5
The image shows a school of fish being located using sonar.
Which two measures are needed to calculate the distance between the fish
and the ship?
A. The number of sound waves emitted from the ship
B. The speed of sound waves
C. The amount of time it takes sound waves to travel to the fish and
back
D. The size of the ship
Answer:
Explanation:
b
Answer: The correct answers are B and C. :)
Explanation:
If you shot your catapult on the moon, what are at least two ways this would affect how your catapult launches?
There is gravity on the Moon, just not as much as on Earth. So a catapult would be able to throw it's ammunition about six times farther than the same catapult on the Earth.
There may be gravity at the Moon, simply not as much as on the planet. So a catapult could be able to throw it's ammunition about six instances farther than the same catapult on this planet. things do not waft at the Moon. They fall, however they do fall slowly, slower than they do on the earth.
Catapults take advantage of elastic force, regarding stretched, compressed, bent, or twisted cloth. To prepare a catapult to launch a rock, it takes paintings to twist a rope, to stretch a rubber band, or bend wood.
Catapults operate the usage of projectile movement, that is a form of science referred to as Physics. Catapult physics is essentially the usage of stored strength to hurl a projectile. The three primary strength storage mechanisms are tension, torsion, and gravity.
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in a certain experiment, a radio transmitter emits sinusoidal electromagnetic waves of frequency 125.0 mhzmhz in opposite directions inside a narrow cavity with reflectors at both ends, causing a standing wave pattern to occur. part a how far apart are the nodal planes of the magnetic field? express your answer in meters.
Distance between nodal planes is calculated to be 2.4m, when given frequency is 125MHz .
What do you understand by radio transmitter?A radio transmitter is an electronic circuit that transforms electric power from a power source into a radio frequency alternating current to the antenna and then the antenna radiates the energy from this current as radio waves.
As we know that, F= c/λ
where c -->speed of light and λ --> wavelength
λ = 2L/n
where; L --> length and n -->nodes
Given frequency = 125 MHz
λ = c / F
= 3 * 10⁸/ 125 *10⁶
λ= 2.4
Hence, distance between nodal planes is 2.4m
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The pressure of the gas is 112 kPa when its temperature is 35 °C.
The gas is heated to 340°C using some different apparatus.
Calculate the pressure of the gas when its temperature is 340 °C.
Assume the gas has a constant volume.
Pressure =
kPa
Answer:
Pressure = 223 kPa
Explanation:
Given:
p₁ = 112 kPa = 112 000 Pa
t₁ = 35°C; T₁ = 273 + 35 = 308 Pa
t₂ = 340°C; T₂ = 273 + 35 = 613 Pa
V - const
___________
p₂ - ?
Charles' law:
p₁ / T₁ = p₂ / T₂
The pressure:
p₂ = p₁·T₂ / T₁
p₂ = 112 000·613 / 308 ≈ 223 000 Pa or p₂ = 223 kPa
Drag the item from the item bank to its corresponding match.
Match the situation with the energy transformation
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
Elastic potential energy transformed into kinetic energy
kinetic energy transformed into electric energy
Gravitational potential energy transformed into kinetic energy
Electrical energy transformed into radiant energy
Chemical potential energy transformed into radiant energy
Electrical energy transformed into kinetic energy
Kinetic energy being transformed into thermal energy
Chemical potential energy transformed into thermal energy
Each situation should be match with the correct energy transformation as follows:
A boy shooting a rubber band across the classroom: elastic potential energy transformed into kinetic energy. A child going down a slide on a playground: gravitational potential energy transformed into kinetic energy. Rubbing your hands together to warm them on a cold day: kinetic energy being transformed into thermal energy. Turning on a battery operated light: chemical potential energy transformed into radiant energy.Using a DC electric motor: electrical energy transformed into kinetic energy.Using a gas power heater to warm a room: chemical potential energy transformed into thermal energy. Using a hand crank generator to produce electric current: kinetic energy transformed into electrical energy. Using the light in your room that is plugged into the wall: electrical energy transformed into radiant energy.What is energy?Energy can be defined as a measure of the ability of a physical body to do work. This ultimately implies that, energy must be possessed or transferred to a physical object or physical body before it can be used in doing a work or heating a system.
What is the law of conservation of energy?The law of conservation of energy states that the energy possessed by a physical body (object) can neither be created nor destroyed, but it can only be transformed from one form to another such as the gravitational potential energy possessed by a child on a slide that is transformed into kinetic energy.
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Complete Question:
Match the situation with the energy transformation.
A boy shooting a rubber band across the classroom
A child going down a slide on a playground
Rubbing your hands together to warm them on a cold day
Turning on a battery operated light
Using a dc electric motor
Using a gas power heater to warm a room
Using a hand crank generator to produce electric current
Using the light in your room that is plugged into the wall
Elastic potential energy transformed into kinetic energy
kinetic energy transformed into electric energy
Gravitational potential energy transformed into kinetic energy
Electrical energy transformed into radiant energy
Chemical potential energy transformed into radiant energy
Electrical energy transformed into kinetic energy
Kinetic energy being transformed into thermal energy
Chemical potential energy transformed into thermal energy
what is the underlying principle of seismograph construction? what is the underlying principle of seismograph construction? a heavy weight suspended within a moving box needs to overcome inertia, resulting in a slight delay in the motion of the box after the weight moves. a heavy weight suspended within a moving box needs to overcome inertia, resulting in a slight delay in the motion of the weight after the box moves. a moving box containing a heavy weight needs to overcome inertia, resulting in a slight delay in the motion of the box after the weight moves. a moving box containing a heavy weight needs to overcome inertia, resulting in a slight delay in the motion of the weight after the box moves.
A heavy weight suspended within a moving box needs to overcome inertia, resulting in a slight delay in the motion of the weight after the box moves. Option B.
The principle underlying the construction of a seismometer is to have a heavy weight suspended from a spring on a pedestal or inside a movable box. A seismograph is an instrument that records and measures the details of an earthquake. A seismograph uses a seismograph to record data.
Elastic deformation bends an object, whereas repulsion returns it to its original shape. This instrument is nothing more than an oscillating rod or pendulum that begins to vibrate when a tremor occurs. The vibration system has a pin. The pen records seismic waves on a sheet of paper that moves underneath. By studying these waves scientists can create a complete map of earthquakes.
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Deuterium is more abundant on venus than elsewhere in the solar system. What do we think this fact tells us about venus?.
We think that it once had huge amounts of water content in its atmosphere.
What is meant by solar system?The Solar System is the gravitationally bound system that includes the Sun and the objects that orbit it. It was formed by the gravitational collapse of a massive interstellar molecular cloud 4.6 billion years ago. The Sun contains the vast majority (99.86%) of the system's mass, with Jupiter holding the majority of the remaining mass. Mercury, Venus, Earth, and Mars are all terrestrial planets made mostly of rock and metal. The four outer system giant planets are significantly larger and more massive than the terrestrials. Jupiter and Saturn are gas giants, composed primarily of hydrogen and helium; Uranus and Neptune are ice giants, composed primarily of volatile substances with relatively high temperatures.
Hence, If Deuterium is more abundant on Venus than elsewhere in the solar system, I think that it once had huge amounts of water content in its atmosphere.
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what is the length between two poles if the hanging cable is 80m long, poles are 50m tall, and the distance between the hanging cable and ground is 10m?
The distance between the poles is 46 m.
Given information indicates that the two towers are 50 meters tall and that the cable is 80 meters long. The midpoint of the cable, designated as h, is 10 meters above the ground.
Let the height be y and the distance from the midpoint to either tower be x. therefore by catenary equation, we get,
y=hcos(x/h)
=>50=10cos(x/10)
Therefore 5=cosx/10
By the tabulated value from the hyperbolic cosine function, we get the value of
cos⁻¹(5)=x/10
=>2.3=x/10
=>x=23
Therefore the distance between the poles is 2x = 2 x 23 = 46 m.
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which factor is not usually considered by physicians when determining how much to charge for a procedure
The charge for a procedure or accepting fees that are predetermined by the plan is dependent on the patient's ability to pay.
What does a physician do?Doctors and surgeons deal with maintaining health as well as diagnosing and treating illnesses and injuries. In addition to conducting physical examinations and medical history inquiries, doctors also order, carry out, and interpret diagnostic tests. Patients frequently receive advice from them on food, cleanliness, and preventative healthcare.
Physician labor is the part of the Medicare Physician Fee Schedule that represents the overhead expenses related to a service.
Mistaken cost.practice cost.Factor of conversion.While precertification gives the provider permission to provide the medical service, preauthorization specifically establishes the dollar amount approved for the medical procedure.
The main distinction between doctors and physicians is that doctors typically specialize in a field of practice while physicians typically have a more general background.
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A 0. 0850-kg arrow is fired horizontally. If the bowstring exerts an average force of 89. 0 n on the arrow over a distance of 0. 782 m, with what speed does the arrow leave the bow?.
40.47 m/s is the speed of the arrow leaving the bow. When 0.0850 kg arrow fired horizontally, and If bowstring exerts average force of 89.0 N on the arrow over distance of 0. 782 m.
What is velocity?The primary indicator of object's position and speed is its velocity. It is distance that object travels in one unit of time. Displacement of item in one unit of time is definition of velocity.
By Newton's second law of motion,
F = ma
m is the mass of the arrow (kg) = 0.0850 kg
a is the acceleration of the arrow (m/s²)
F is the force applied (N) = 89.0 N
F= ma
a = F/m
a = 89.0/ 0.0850
∴ a= 1,047.059 m/s²
Now, object have acceleration, and the object will move in non-uniform motion. so the formula applied is:
[tex]v_{t}[/tex] = [tex]v_{0}[/tex] + at
[tex]v_{t}^{2}[/tex] = [tex]v_{0}^{2}[/tex] + 2×a×d
∴ d = [tex]v_{0}[/tex]×t +1/2× a ×t²
here,
[tex]v_{0}[/tex] = initial speed (m/s) = 0 m/s (arrow stationary in bowstring)
[tex]v_{t}[/tex] = final speed (m/s)
a = acceleration (m/s²) = 1,047.059 m/s²
t = interval (s)
d = distance (m) = 0.782 m
[tex]v_{t}^{2}[/tex] = [tex]v_{0}^{2}[/tex] + 2×a×d
[tex]v_{t}^{2}[/tex] = 0² + 2 × 1,047.059 × 0.782
[tex]v_{t}^{2}[/tex] = 1637.6
[tex]v_{t}[/tex] = [tex]\sqrt{1637.6}[/tex]
[tex]v_{t}[/tex] = 40.47 m/s
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Using the data collected from the motion detector, the group of students is
able to calculate both initial and final velocities. The initial velocity is
measured when the mass is released, and the final velocity is measured just
as the mass hits the floor. Using these velocities, they calculate the initial and
final kinetic energies. They also calculate the initial gravitational potential
energy by measuring the initial height when the mass is released. The final
gravitational potential energy is taken to be zero at the floor. When they
compare the final (kinetic) energy value to the initial energy value (that is, the
sum of the initial kinetic and gravitational potential energies), which of the
values is greater...
if the assumptions presented in the previous problem are true?
The initial and final energies a
if the assumptions presented in the previous problem are not true?
[ Select ]
Unless the above assumptions are clear, the initial and final energies are equal.
What is kinetic energy?Kinetic energy is the form of energy that an object or a particle possess due to its motion. If work, that transfers energy, is done on an object by applying a net force, the object accelerates and thereby gains kinetic energy. Kinetic energy is a property of a moving object or particle and depends on its motion as well as its mass. The type of motion may be translational (or motion along a path from one place to another), rotational, vibrational, or any combination of motions. Translational kinetic energy is one-half the product of its mass (m) and the square of its velocity (v) or 1/2mv².
Given,
Initial and final velocities = v₁ and v₂
Initial kinetic energy = [tex]\frac{1}{2} mv_{1} ^{2}[/tex]
Final kinetic energy = [tex]\frac{1}{2} mv_{2} ^{2}[/tex]
Gravitational potential energy is calculated = mgh
As the assumptions are not clear, this question assumes no air resistance. As a result, no energy is consumed by work.
then
Initial Kinetic Energy = Final Kinetic Energy
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What are some applications of the field of spectroscopy? Select 5 options.
O for identifying elements in a sample
O for determining the distance and velocity of galaxies
O for producing neon lights
O for determining types of chemical bonds
O for use in medical imaging devices
O for killing bacteria in foods
Answer:
for identifying elements in a sample
for determining the distance and velocity of galaxies
for producing neon lights
for determining types of chemical bonds
for use in medical imaging devices
Explanation:
I hope this helps. :)
What is The reason at which carbon dating works?
how do you predict that the amplitude of alpha waves recorded from a subject tested alone, in a darkened room, differ from subjects tested in a lab full of students? what might account for this?
The subject tested alone would yield better findings and higher alpha values than the subject evaluated in a lab with several pupils.
How are alpha waves recorded?Electrophysiological and closely related techniques, such as electroencephalography (EEG) or magnetoencephalography (MEG) can detect and quantify some types of brain waves, including alpha waves (qEEG).Alpha brainwaves have a higher amplitude and are slower.They oscillate between 9 and 14 cycles per second.An alpha state is frequently experienced by someone who has finished a task and is taking a break.When someone takes some time to think or meditate, they are typically in an alpha state.To learn more about Alpha brainwaves refer,
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a skateboard rolls down a hill and the wheels do not slip against the pavement. does the static friction force of the pavement on the wheels do any work on the skateboard? g
The static friction force of the pavement on the wheels will not do any work on the skateboard.
Static friction is a variable resisting force that is equal and opposite to the external force until it exceeds the motion threshold when sliding begins.
It is also called as self adjusting force.If the skateboard is rolling at a constant speed without any other forces acting on it, then there is no tendency to slip between the wheel and the surface, so there is no frictional work. Friction will only try to prevent slipping between the 2 surfaces.
On an inclined plane, the wheels will tend to slide down, and if there were no friction, it would again slide between the wheels and the inclined surface. Perhaps friction will always try to counteract the slip, so here it acts upward on the slope to try to prevent the skateboard from sliding down the slope. This has the effect of applying a moment to the skateboard causing it to roll.
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gravitational potential energy is always measured group of answer choices relative to the ground. relative to the center of the earth. relative to the center of the sun. relative to an arbitrary reference level.
The gravitational potential energy is always measured relative to the ground.
The gravitational potential energy of a system is related as.
PE = MgH
Where,
M is the mass of body,
g is the acceleration due to gravity,
H is the height of the body with respect to the ground.
As we know, for a particular surface on earth, the mass and g is always constant.
Only the height of the body is changing with respect to the ground, Hence we can conclude here, that gravitational potential energy of a body is measured with respect to the ground.
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Also Giving BRAINLIEST!!
2. In Fig. 2-7 a mass m of 12.00 kg is pulled, at constant speed, along an inclined plane which makes an angle with the horizontal.
(a) What is the value of angle A if we want to raise the mass m to a height of h = 2.00 m?
(b) What is the mechanical advantage produced by the inclined plane? We assume that the inclined plane is frictionless.
Answer:
As P is increased from mg(sinθ−μcosθ) to mg(sinθ+μcosθ) frictional force will change from mgcos ( upwards parallel to inclined plane) to 0 to mgcos (downwards parallel to inclined plane). Under the approximation of linear variation of P the correct option is A.
1.what did you observe about the motion of objects during and after collisions? 2. based on the velocity change of each object, what did you infer about the direction of forces during a collision?
1.When two objects collide, both objects experience forces that are equal in magnitude and opposite in direction. Such forces often cause one object to accelerate (gain speed) and another object to slow down (lose speed).
2. The effect of the forces experienced on the objects during the collision is different if the masses of the objects are different. The same force causes different changes in velocity for objects with different masses. An object with a smaller mass has a greater change in velocity when the same force is applied.
What is collision?A collision means that two objects collide with each other for a very short time. In other words, a collision is the interaction of two masses in a very short period of time, where the momentum and energy of the colliding masses change.
The law of conservation of momentum usually applies to collisions between two masses, but some collisions may involve kinetic energy. Depending on the conservation of energy there can be two types of conservation:
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fiona is trying to describe the location of some of the brightest set of stars in the northern sky, betelgeuse and rigel, to a friend. what could she have her friend look for to help find the stars?
What Fiona did, so her friend could find the stars was to give her friends knowledge about the contents of the sky, such as the shape of planets and stars. Then when you want to see the stars, you have to stay away from light pollution, so the stars can be seen clearly.
Stars are celestial bodies that emit light caused by nuclear fusion reactions that produce energy that occurs in their cores. It should be noted that 'pseudo stars' are not stars, but planets that reflect light from other stars and appear to glow in the sky like a star. A planet or planetary star is an astronomical body orbiting a star or stellar remnant that is massive enough to have its own gravity.
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eighteen-month-old annabelle looks in the mirror, sees that the reflection in the mirror has a mark on her nose, and touches her own nose. what can we conclude?
We can conclude that Recognizing herself. The process of reflecting light rays that fall on a polished surface is known as reflection of light.
What is Reflection?
It assists us in gaining understanding and determining how to proceed. The wave front returns to the medium from which it originated is referred to as reflection. Reflection of light, sound, and water waves are common examples.
Reflection is the process of investigating and analyzing oneself, one's perspectives, characteristics, experiences, and actions / interactions. It assists us in gaining understanding and determining how to proceed.
The process of reflecting light rays that fall on a polished surface is known as reflection of light. The angle of reflection is always equal to the angle of incidence, according to reflection laws. (ii) The incident, reflected, and normal rays all lie in the same plane.
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Recognizing herself, we can infer. Reflection of light is the process of reflecting light rays that strike a polished surface.
What is Reflection?It helps us understand and make decisions about how to move forward. Reflection is the process by which the wave front returns to the original medium. Examples of reflection include the refraction of light, sound, and water waves.The act of reflecting involves looking within and examining one's perspectives, traits, experiences, and behaviors and relationships. It helps us understand and make decisions about how to move forward.Reflection of light is the process of reflecting light rays that strike a polished surface. According to reflection laws, the angle of reflection is always the same as the angle of incidence. (ii) The same plane is shared by the incident, reflected, and normal rays.To learn more about Reflection refer to:
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the movement of sand parallel to the shore: question 3 options: is created by waves approaching at an oblique angle to the shoreline. is achieved by longshore currents, causing longshore drift. is caused by deep ocean currents. none of these choice are correct.
It is the oblique angle of the waves breaking on the beach that causes longshore drift, which is the movement of sand parallel to the shore. The development of cavities on the coast, like bays and deltas, can be filled in by this phenomenon, causing the beach to cross into the mainland. Spits are narrow, outgrowths of the beach. A barrier island is formed when a storm, such as a hurricane, cuts inward through the spit.
Beaches formed along the low coastal plains during the last eras when sea levels were lower. Large dune ridges of beach sand were piled up in a shoreward direction. The coastal plains became inundated due to a rise in sea levels caused by the melting ice caps. The crests of the submerged dunes offshore eventually formed the island's heart. The dune ridges were later reshaped and enlarged into a barrier island by wave action and longshore drift.
The coastlines that the aforementioned islands protect are less likely to be damaged/disturbed by waves and storms. Barrier island beaches are not heavily secured, so storm waves can easily crash into them. The side of the land of a barrier island is where most of the action is, even though beaches and dunes tend to get the most attention.
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a light bulb consumes energy at a rate of . how long in will it take for the light bulb to consume in energy?
It will take the lightbulb 2875 seconds to use 2.3×10⁵J of energy.
Why does power matter?Power is the amount of work completed in a given amount of time, or time spent working. The joules per second (J/s)-based SI unit of power is the Watt (W).
Given,
Power (P) = 80 J/s
Energy (E) = 2.3×10⁵ J
Time (t) = ?
The pace at which energy is utilized is a straightforward definition of power. Power can be mathematically stated as:
Energy x time equals power
P = E/t
We can calculate the time it takes for the bulb to use 2.3 105 J using the formula above. This is attainable as follows:
Power (P) = 80 J/s
Energy (E) = 2.3×10⁵ J
Time (t) = ?
Power = Energy / time
P = E/t
80 = 2.3×10⁵ /t
80 × t = 2.3×10⁵
Divide both side by 80
t = 2.3×10⁵ / 80
t = 2875 s
As a result, it will take the lightbulb 2875 seconds to use 2.3×10⁵J of energy.
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Complete question is "A light bulb consumes energy at a rate of 80joules per second . How long in seconds will it take for the light bulb to consume 2.3×10⁵in energy?".
spring a is stiffer than spring b (ka > kb). the spring force of which spring does more work if the springs are compressed (a) the same distance and (b) by the same applied force?
Given that A was stiffer than B (KA > KB), the force given to both springs is the same for A, whose spring constant is higher than B's but whose expansion is smaller, and whose work will thus be less than B's.
What does physics' ideal spring look like?The equilibrium length of a perfect spring exists. When a spring is squeezed, a force pushing each end apart has a magnitude proportional to the length drop from the equilibrium length.
What is the Spring-Hooke law?Hooke aimed to show how a spring's elasticity and the forces acting on it are related. According to Hooke's Law, a spring's extension is proportional to the load placed on it. As long even as load does not exceed a material's elastic limit, a variety of materials abide by this rule.
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2. Hot-air balloons are a fun way to travel around the globe.
A. In what layer can a hot-air balloon travel?
B. Why can't a hot-air balloon go to higher layers?
20points
The layer that the hot-air balloon can travel to, in the layer of the atmosphere is troposphere. its can't a go to higher layers because it would be affected by density.
What is troposphere?The troposphere servesv as the lowest layer of Earth's atmosphere however it has the mass (about 75-80%) of the atmosphere and most of tthe types of clouds can be seen in the troposphere, then the weather occurs within this layer.
It should be noted that the troposphere has the highest density, as well as the greatest air pressure, however the water vapor, and a temperature range from 62, layer that the hot-air balloon can travel to, in the layer of the atmosphere is troposphere.
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An 80kg woman jumps from a wall and lands stiff-legged in soft sand. The woman's downward speed just as she touches the sand is 6m/s. She is stopped after sinking 0.05m into the sand. Calculate the net force on the woman while she is being stopped by the sand. Round to nearest whole number
The net force on the woman while she was stopped by the sand is 28800 N.
What is force?Force can be defined as the product of the mass of a body and its acceleration.
To calculate the net force on the woman, we use the formula below.
Formula:
F = m(v²-u²)/2s........... Equation 1Where:
m = Mass of the womanF = Force on the womanv = Final velocityu = Initial velocitys = DistanceFrom the question,
Given:
m = 80 kgv = 6 m/su = 0 m/ss = 0.05 mSubstitute these values into equation 1
F = 80(6²-0²)/(2×0.05)F= 80×36/0.1F = 28800 NHence, the net force on the woman is 28800 N.
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spherical sound waves are emitted from a 0.80-w source. assuming that the energy of the waves is conserved, what is the intensity at 0.40 m from the source?
The intensity of the sound at a distance of 0.40 m from the source is 0,398 W/m²
Sound wavesSound waves are classified as a longitudinal wave where the direction of propagation is parallel to the direction of vibration.
Sound intensity is formulated as follows:
I = P / A
I = Sound Intensity (W/m²)
P = Power of the Sound Source (W)
A = Area of the field through which the sound wave passes (m²)
Since the sound wave propagates in all directions, the area of the field traversed by this sound wave will form the surface area of the sphere, then:
I = P / (4πR²)
R = Surface radius (m)
So, The intensity of the sound at a distance of 0.40 m from the source is:
I = P / A
I = P / ( 4π . R² )
I = 0,80 / ( 4π . (0,4)²)
I = 0,398 W/m²
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In several sentences, describe one example of classical conditioning you have experienced or witnessed in everyday life (ex. training a pet, food dislikes due to illness, conditioned fears, etc.). Identify the unconditioned stimulus, unconditioned response, neutral/conditioned stimulus, and conditioned response in your example.
The dog that leans to associate the bell with salivation and food is a case of classical conditioning.
What is classical conditioning?The idea of classical conditioning is that the individual is able to link up the unconditioned stimulus to the conditioned stimulus. This implies that the organism has been taught to link up a particular stimulus with another.
Let us at this point recall the famous experience in the experiment of Pavlov. In this case, we know that a dog would always salivate if the dog smells the approach of food coming towards it.
Imagine that we now have to ring a bell when we are bringing the food to the dog. So much so that the dog has been able to link up the bell with the fact that the food is approaching.
It comes to a point that the dog would now salivate just at the sound of the bell even when the food is not in sight.
Hence, in this case, the unconditioned stimulus is the salivation while the conditioned stimulus is the bell that causes the salivation.
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