Are stairs a type of inclined plane?
Answers
Answer:
Inclined planes are simple machines used to make work easier. Ramps, ladders, and staircases are all inclined planes.
Explanation:
Answer:
imma say yes
Explanation:
Related Questions
What is work?
A. Force times an object's displacement
OB. The distance an object moves over time
C. The time it takes an object to move a certain distance
O D. The force that distance makes
SUBMIT
Answers
Janice measured the mass and the volume of an object. She then determined the density of the object by dividing
the object's mass by its volume (D =
D=)
Which value would most likely represent the density of the object?
O-1 g/cm
O 4 m/s
0-3 m/s
O 6 g/cm
Answers
Answer:
6 g/\(cm^{3}\)
Explanation:
hope this helps! it's correct on edge.
The value that would most likely represent the density of the object is \(6 \ g/cm^3\)
Density is defined as the ratio of mass to volume of an object.
Density is directly proportional to mass and inversely proportional to volume, that is, density increases with increase in mass and decreases with increase volume.
The unit of density is gram per cubic centimeter (g/cm³).
\(Denisty = \frac{mass}{volume} = \frac{g}{cm^3}\)
Only two options have this unit in the given question.
Also, the value of density is absolute, that is density cannot be negative. The only option that satisfies this is \(6 \ g/cm^3\)
Thus, the value that would most likely represent the density of the object is \(6 \ g/cm^3\)
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What makes water stick to itself and other molecules?
Answers
Water molecules may adhere to itself and to other molecules because of the existence of hydrogen bonds.
A hydrogen bond is a weak electrostatic attraction between a partly positive hydrogen atom in one molecule and a partially negative atom in another (typically oxygen or nitrogen). Each molecule of water comprises two hydrogen atoms and one oxygen atom. The oxygen atom is somewhat negatively charged, while the hydrogen atom is partially positively charged.
When two water molecules come into contact with one other, the partly negative oxygen atom of one water molecule is attracted to the partially positive hydrogen atoms of the other water molecule, resulting in the formation of a hydrogen bond. Water molecules stay together due to hydrogen bonding, giving water its distinctive features such as high surface tension and cohesiveness.
Water can also cling to other molecules with partial charges, such as polar compounds such as salt or sugar. A water molecule's partly negative oxygen atom can attract positively charged sodium or sugar molecules, forming a connection between them.
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what's a formula of velocity?
Answers
\( \boxed{\boxed{ \rm \: Velocity = \dfrac{Displacement}{Time} }}\)
The diagram above shows the process of natural selection. What is X?
Competition
Evolution
Mimicry
Reproduction
Answers
Answer:
Reproduction
Explanation:
because reproduction produces variation within the species allowing the species to survive selection
Answer: D = reproduction
Explanation:
Psychological perspectives exist:
A. to enforce one particular way of looking at problems.
O B. so that there can be different ways of looking at psychological
questions.
O
C. to address the physical properties of the brain.
D. to explain the science of behavior.
Answers
Psychological perspectives exist to explain the science of behavior, it deals with studying the science of cognitive behavior, hence option D is correct.
What are psychological perspectives?The five major psychological perspectives are biological, psychodynamic, behavioral, cognitive, and humanistic.
It generally suggests the behavior of humans both consciously and unconsciously and deals with the humans way of thinking and their behavior so it is the science of behavior.
Therefore, psychological perspectives are to explain the science of behavior.
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The velocity of a bus increases by 20 m/s in 80 seconds. What is the
acceleration of the bus?
A. 0.25 m/s2
B. 4 m/s2
C. 60 m/s2
D. 100 m/s2
Answers
Answer:
A
Explanation:
velocity is measured in m/s
acceleration has units m/s^2
so divide the velocity change by the time change:
20 m/s / 80 s = 20 / 80 = .25 m/s^2
Which are examples of perfectly inelastic collisions? Check all that apply. a baseball bouncing off a bat bumper cars bumping off of each other a cue ball hitting an eight ball and stopping a plane landing on an aircraft carrier rain sticking to a window two train cars coupling together
Answers
Answer:
Following are the option are the correct option to the given question
Plane landing on an aircraft carrier. Rain sticking to a window. Two train cars coupling together.Explanation:
In the inelastic collisions is the kinetic energy is not preserved because of the some internal friction.In the elastic collision there is shortage of the kinetic capacity.
When the airplane is landing it has always been in contact with the surface to relieve the inelastic collision condition.When then rain falls the clinging to the door once it intersect with as well so it is satisfied the condition of inelastic collision.When the two train or cars collide there is loss of kinetic energy so it is satisfied the condition of inelastic collision.All the other option is not the example of inelastic collision that's why they are incorrect option.The examples of perfectly inelastic collisions include;
a cue ball hitting an eight ball and stoppinga plane landing on an aircraft carrierrain sticking to a windowtwo train cars coupling togetherIn a perfect inelastic collision, after the collision of the two objects involved, they will move together with the same velocity.
This process results in conservation of the momentum of the objects but the kinetic energy decreases.
Thus, the examples of perfectly inelastic collisions include the following;
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1. Renu has the following symptoms.
swelling of the feet, loss of feeling in hands and feet
sores in the mouth loss of appetite
The type of diet she needs to eat should be rich in --------
A
vitamin B B
iodine
C
calcium D
vitamin C
Answers
Answer:
A. vitamin B
Explanation:
Lab partner says in newton second law by pushing a 10 KG object with 10 N and then pushed a 20 KG object with 20 in. They wanted to see effect of doubling the force of an object which choice explains why this I cannot be used to show the effect of
Answers
Answer:
must double the force, with the same masses you get twice the acceleration.
Explanation:
Newton's second law establishes a relationship between force and acceleration where the constant of proportionality is mass
F = m a
To prove these relationships you must double the force, with the same masses you get twice the acceleration.
2F = m 2a
The downside is that if you double the mass, the acceleration stays the same.
2F = 2m a
An object experiences a constant acceleration of 2 m/s/s along the -x-axis for 2.7s, attaining a velocity of 18.m/s in a direction 47 degree from the +x-axis. Calculate the magnitude of the initial velocity vector of the object.
Answers
We know that the final velocity of the object is 18 m/s in a direction of 47° from the x-axis; this means that the final velocity as vector is:
\(\begin{gathered} \vec{v}=\langle18\cos 47,18\sin 47\rangle \\ =\langle12.28,13.16\rangle \end{gathered}\)Now, since the acceleration is along the x-axis this means the the y-component of the initial velocity remains constant; hence the y-component of the final velocity is the same as the y-component of the initial velocity. This also means that the x-component is the only one that changes; since the acceleration is constant throught the 2.7 seconds we can use the formula:
\(a=\frac{v_f-v_0}{t}\)To find the x-component of the initial velocity:
\(\begin{gathered} -2=\frac{12.28-v_0}{2.7} \\ -2(2.7)=12.28-v_0 \\ v_0=12.28+2(2.7) \\ v_0=17.68 \end{gathered}\)Therefore the initial velocity is:
\(\vec{v}_0=\langle17.68,13.16\rangle\)Its magnitude is:
\(\begin{gathered} v_0=\sqrt[]{(17.68)^2+(13.16)^2} \\ v_0=22.04 \end{gathered}\)Therefore the magnitude of the initial velocity is 22.04 m/s.
need help in physices please help
Answers
what is the best description of a mechanical wave
Answers
B, A mechanical wave transfers energy through empty space
Explanation:A wave that is an oscillation of matter and is responsible for the transfer of energy through a medium is called a mechanical wave. The distance of the wave's propagation is limited by the medium of transmission.
OrA mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave.
Answer:
A is your answer
Explanation:
I am an former AP Physics student.
A quarterback takes the ball from the line of scrimmage, runs backward for 5 yards, and then runs sideways parallel to the line of scrimmage for 10 yards. At this point, he throws a
45 yard forward pass straight down the field. What is the magnitude of the football's resultant displacement?
(?) yards
Answers
42.72 yards . FULL SOLUTION BELOW IN THE IMAGE ..
How far is the quarterback from the line of scrimmage?In an American football game, the quarterback receives the ball at the line of scrimmage and runs 10.0 yards backward before running 15.0 yards sideways parallel to a line of scrimmage.
What is a line of scrimmage in football?A lines of scrimmage is football is an imaginary line that runs perpendicular to the goal lines & tangent to a nose of the ball when it is placed on the ground. It designates where the ball should be at the beginning of each down.
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The __________ might say that government action need only have a reasonable relation to the achievement of a legitimate government purpose to be constitutional.
Answers
The rational basis test might say that government action need only have a reasonable relation to the achievement of a legitimate government purpose to be constitutional.
How does the rational basis test determine the constitutionality of government action?The rational basis test is a legal standard used by courts to evaluate the constitutionality of government action. Under this test, the government action is considered constitutional if it has a reasonable relationship to a legitimate government purpose.
In other words, the government must demonstrate that there is a rational basis for its action and that it is not arbitrary or discriminatory. Unlike stricter scrutiny tests, such as strict scrutiny or intermediate scrutiny, the rational basis test is more deferential to the government and allows for a wider range of justifications for the action.
It is often applied in cases involving economic regulations or social policies where fundamental rights or suspect classifications are not at issue.
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Body Systems Directly Involved (Give at Least 2)
Cartoon
13. Ouch! You step on a tack and jump away without even thinking. Then you decide to pick up the tack and place it back in a desk drawer.
I need the second one the nervous system and...
Answers
Answer:
Nervous system and immune system
Explanation:
The nervous system is involved because you immediately jumped away, that ur brain and nerves initiating the fight or flight response. The immune system is involved because the tack most likely pierced your skin, so your immune system needs to work to make sure the wound does not get infected.
7. Identify one effect of the events that resulted from the response to this 7 points
letter. "
O (1) lasting peace between Christians and Muslims in the Middle East
O (2) permanent Christian control of Turkey
O (3) the introduction of new ideas and demand for new goods in Europe
O (4) the spread of Christianity throughout the Americas
Answers
One effect of the events resulting from the response to this letter is the spread of Christianity throughout the Americas (option 4). The discovery of the Americas by European explorers and subsequent colonization led to the introduction of Christianity to the indigenous populations. European colonizers, particularly Spanish and Portuguese, undertook missionary efforts to convert the indigenous peoples to Christianity. This resulted in the establishment of Christian institutions, the construction of churches, and the integration of Christian beliefs and practices into the cultures of the native populations. The spread of Christianity throughout the Americas had a lasting impact on the religious, cultural, and social landscape of the region. It influenced the beliefs, customs, and traditions of the indigenous peoples and played a significant role in shaping the history of the Americas.
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what is the definition for speed?
Answers
Explanation:
the rate at which someone or something moves or operates or is able to move or operate.
A light-year is a unit of a. time. c. mass. b. distance. d. density. please select the best answer from the choices provided a b c d
Answers
Answer:
distance
Explanation:
it is the distance traveled by light in one year
A light-year has a bit of a deceiving name. Despite the fact that it seems to imply it is a measure of time, this is not of fact correct. A light-year refers to how far light can travel within a year. One light year is approximately 6 trillion miles. Light years are used to measure extremely far distances such as how far the sun is from other stars, or how far away other exoplanets (planets outside our solar system) are.
A piece of clay was thrown so that it has a momentum of 34 kg·m/s. It hits a 0.25 kg motionless cart and sticks to it. What is the momentum of the clay and cart combined? (ignore friction)
Answers
The momentum of the clay and the cart is 34 kgm/s.
What is momentum?Momentum can be defined as the product of mass and velocity.
To calculate the momentum of the clay and the cart, we use the formula below.
Formula:
M' = M+mu..............................Equation 1Where:
M' = Momentum of the clay and the cartM = Momentum of the claym = Mass of the cartu = Initial velocity of the cartFrom the question,
Given:
M = 34 kgm/sm = 0.25 kgu = 0 m/s (motionless)Substitute these values into equation 1
M' = 34+(0.25×0)M' = 34 kgm/sHence, their momentum is 34 kgm/s.
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Explain how a meteorologist use tools to forecast the weather. Include passages from the text to support your answer.
Answers
Answer:
1. Doppler radar
2.Satellite data
3.Radiosondes
4. Automated surface-observing systems
5.Supercomputers
6.AWIPS
Explanation:
1. Doppler Radar is the meteorologist’s window into observing severe storms. With 159 radar towers across the United States, NOAA’s National Weather Service has comprehensive coverage of the continental U.S. and partial coverage of Alaska, Hawaii, Puerto Rico and Guam. Doppler radar detects all types of precipitation, the rotation of thunderstorm clouds, airborne tornado debris, and wind strength and direction.
2.Weather Satellites monitor Earth from space, collecting observational data our scientists analyze. NOAA operates three types of weather satellites. Polar orbiting satellites orbit the Earth close to the surface, taking six or seven detailed images a day. Geostationary satellites stay over the same location on Earth high above the surface taking images of the entire Earth as frequently as every 30 seconds. Deep space satellites face the sun to monitor powerful solar storms and space weather. NOAA also uses data from satellites operated by other agencies and countries.
3.Radiosondes are our primary source of upper-air data. At least twice per day, radiosondes are tied to weather balloons and are launched in 92 locations across the United States. In its two hour trip, the radiosonde floats to the upper stratosphere where it collects and sends back data every second about air pressure, temperature, relative humidity, wind speed and wind direction. During severe weather, we usually launch weather balloons more frequently to collect additional data about the storm environment.
4.ASOS (automated surface observing systems) constantly monitor weather conditions on the Earth’s surface. More than 900 stations across the U.S. report data about sky conditions, surface visibility, precipitation, temperature and wind up to 12 times an hour. Nearly 10,000 volunteer NWS Cooperative Observers collect and provide us additional temperature, snowfall and rainfall data. The observational data our ASOS and volunteers collect are essential for improving forecasts and warnings.
5.NOAA’s Weather and Climate Operational Supercomputer System (WCOSS) is the backbone of modern forecasting. With 5.78 petaflop computing capacity it can process quadrillions of calculations per second. Our supercomputers are almost 6 million times more powerful than your average desktop computer. Observational data collected by doppler radar, radiosondes, weather satellites, buoys and other instruments are fed into computerized NWS numerical forecast models. The models use equations, along with new and past weather data, to provide forecast guidance to our meteorologists.
6.AWIPS (NOAA’s Advanced Weather Information Processing System) is a computer processing system that combines data from all the previous tools into a graphical interface that our forecasters use to analyze data and prepare and issue forecasts, watches, warnings. This system uses NOAA supercomputers to process data from doppler radar, radiosondes, weather satellites, ASOS, and other sources using models and forecast guidance products. After meteorologists prepare the forecasts, AWIPS generates weather graphics and hazardous weather watches and warnings. All this helps our meteorologists create more accurate forecasts and faster than ever before.
The image shows a landform created by Earth’s forces.
A dip in a mountain range between two plates.
Which describes this landform?
anticline
shearing
syncline
tension
Answers
The term that best describes the landform "dip in a mountain range" is C. Syncline.
Syncline is a term to refer to a fold of the Earth's crust caused by the tectonic effects of the earth's dynamics. A synclinal fold is characterized by being a concave fold, that is, in the shape of a U.
According to the above, answers A, B and D are not correct options because they refer to different shapes of the Earth. Therefore, the landform shown is syncline.
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Answer: C
Explanation: E2022
a ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. it is then turned off and coasts to a stop in an additional 40 s. what is the ratio of the average angular acceleration for the first 20 s to that for the last 40s? a ceiling fan is turned on and reaches an angular speed of 120 rev/min in 20 s. it is then turned off and coasts to a stop in an additional 40 s. what is the ratio of the average angular acceleration for the first 20 s to that for the last 40s?
Answers
The ratio of the average angular acceleration for the first 20s to that for the last 40s is -2.
Here it is given that the angular speed of a ceiling fan is 120 rev/ min
Time = 20s
As the fan comes to rest after the 40s.
Angular acceleration of the first 20s to the last 40s
Angular acceleration for the first 20s
α1 = Δω/ t
α1 = 120 / 20
= 60 rev / s²
Angular acceleration for the last 40s
α2 = Δω/t
= 0-120/ 40
= -3 rev/ s²
The ratio of average angular acceleration is:
α1/ α2 = 6/-3
= -2
Therefore the ratio is -2.
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t/f: The larger the parallax shift, the closer an object is to us
Answers
True. The larger the parallax shift, the closer an object is to us. Parallax is used to measure distances in astronomy.
The larger the parallax shift, the closer an object is to us. Parallax is the apparent shift in the position of an object when viewed from different vantage points. In astronomy, it is used to measure the distance to nearby stars. The parallax shift is inversely proportional to the distance to the object. Therefore, a larger parallax shift indicates that the object is closer to us, while a smaller parallax shift suggests that the object is farther away.
In astronomy, parallax is the apparent shift in the position of an object when observed from different locations. By measuring the angle of this shift, astronomers can calculate the object's distance. A larger parallax shift indicates a smaller distance, as the object appears to move more relative to background objects when observed from different positions.
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a man wants to test a rope. he ties one end to a telephone pole and the other to a horse. the horse pulls as hard as it can, but is not strong enough to break the rope. the man replaces the telephone pole with a second horse of identical strength. assume the two horses pull in opposite directions as hard as they can. will the rope break? explain your answer.
Answers
The rope will not break. Even though the two horses are pulling in opposite directions, their strength is identical and therefore cancels out.
The rope is not subjected to any greater force than when only one horse was pulling. If the rope was not strong enough to withstand the force of one horse, it would have broken when the first horse pulled on it.
This shows that maybe the rope is stronger and perhaps it was actually able to withstand the force than the horses when it is single and when now they are combined to form a greater force.
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Type the correct answer in each box. Round your answer to the nearest hundredth. An illustration depicts a bob with a pendulum at a position labeled A is pulled to a position labeled B with a height of 0 point meters from the ground on the left end and swings to a position labeled C on the right end. The bob (weight) at the end of a pendulum has a mass of 0.3 kilograms. The bob is pulled to position B and allowed to swing. It goes all the way to position C and swings back. The potential energy of the bob at position B is joules. If the maximum height of the bob is 0.45 meters when it swings back, joules of energy was transformed to thermal energy. Use g = 9.8 m/s2 and PE = m × g × h.
Answers
To calculate the potential energy (PE) of the bob at position B, we can use the formula PE = m × g × h, where m is the mass of the bob, g is the acceleration due to gravity, and h is the height.1.323 Joules of energy was transformed to thermal energy
Given:
Mass of the bob (m) = 0.3 kg
Acceleration due to gravity (g) = 9.8 m/s^2
Height at position B (h) = 0 meters (since it is at ground level)
Substituting these values into the formula, we have:
PE = 0.3 kg × 9.8 m/s^2 × 0 m
PE = 0 Joules
Therefore, the potential energy of the bob at position B is 0 Joules.
Next, we need to calculate the energy transformed to thermal energy when the bob swings back to its maximum height at position C.
Given:
Maximum height at position C (h) = 0.45 meters
Using the same formula, we can calculate the potential energy at position C:
PE = 0.3 kg × 9.8 m/s^2 × 0.45 m
PE = 1.323 Joules
Since energy is conserved in this system, the difference in potential energy between positions B and C represents the energy transformed to thermal energy. Therefore:
Energy transformed to thermal energy = PE at position C - PE at position B
Energy transformed to thermal energy = 1.323 Joules - 0 Joules
Energy transformed to thermal energy = 1.323 Joules
Therefore, 1.323 Joules of energy was transformed to thermal energy.
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A cop car’s siren has a frequency of 700. H z. If you are standing on the sidewalk as the cop car approaches you at a speed of 15.0 m/ s, what frequency would you hear if the cop was driving away from you at a speed of 25 m/s. The speed of sound is 343 m/ s.
a. 1166 Hz
b. 732 Hz
c. 652 Hz
d. 1263 Hz
URGENT PLS HELP!!!
Answers
The frequency you hear if the cop was driving away from you at a speed of 25 m/s is 652 Hz. The correct option is C.
What is frequency?It is the number of oscillations per second of the sinusoidal wave.
A cop car’s siren has a frequency of 700. H z. If you are standing on the sidewalk as the cop car approaches you at a speed of 15.0 m/ s.
The cop was driving away from you at a speed of 25 m/s. The speed of sound is 343 m/ s.
The frequency you hear will be calculated using the following formula
f' = f(Vs - Vo)/(Vs +Vc)
Substitute the values into the above equation, we get
f' = 700 x (343 - 0) / (343 + 25)
f' = 652.45 Hz
or f' = 652 Hz
Thus, the frequency you hear when the cop is driving away is 652 Hz.
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According to newtons third law if an eighth grader pushed against a large boulder with a force of 8 N how much force would the boulder exert on the eighth grader
Answers
Answer:
8n
Explanation
Identify the parts of a vector.
Please help. I'm unable to comprehend vector operations.
Answers
The magnitude, direction, components, origin, and terminal points are the key parts of a vector.
How do we calculate?A vector is known to have several components that define its properties and characteristics.
The magnitude or length of a vector represents its size or magnitude and is a scalar quantity that specifies the distance or amount of the vector.
The direction of a vector represents the orientation or angle at which the vector is pointing and indicates the line along which the vector is directed in most cases can be described using angles, unit vectors, or in relation to a coordinate system.
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Applying Physics to Human Geography where Distance = Speed x Time: If humans originated in Africa and migrated to other parts of the world, some time would be required for this to occur. At a modest rate of one kilometer per year, how many centuries would it take for humans originating in Africa to migrate to China, some 10,000 kilometers away? Show your work for full credit.
Answers
Answer:
Explanation:The question is about the diffusion of humans, traveling at a speed of
v
=
1
km/year
, attempting to migrate to China over a distance of
d
=
10000
km
. The time taken is obtained as:
t
=
d
v
=
10000
km
1
km/year
=
10000
years
.
We are asked to provide the answer in centuries. Noting that 1 century is equivalent to 100 years, we write the time required as:
10000
years
100
years/century
=
100
centuries