Answer:
Step on the gas pedal (increase in speed).
Step on the brakes (decrease in speed).
Turn the steering wheel (change in direction).
A bus driver can make the bus accelerate by pressing the gas pedal, releasing the brakes, or changing to a higher gear.
To make the bus accelerate, a bus driver can perform several actions. Three ways a bus driver can cause the bus to accelerate are:
1. Pressing down on the gas pedal, which increases the engine's output and propels the bus forward, increasing its speed.
2. Releasing the brakes, if they were partially engaged, reducing the force opposing the bus's forward motion and allowing it to speed up.
3. Changing the gear ratio, if applicable, by shifting to a higher gear in vehicles with a manual transmission, which can increase acceleration at different speeds.
Please I really need help
Answer:
10 Is the last one (D) 11 is the one you picked, or the third option. (C)
Explanation:
The rate at which current flows is measured in .
Answer:
Ampere
Explanation:
The ampere is the unit of measurement in the international system. Its equal to a coulomb/second. It can be describe as the rate of charges flowing throught a conductor
If you're talking water current, it could be gallons per hour, liters per second, acre feet per month, feet per second, mile per hour, etc. Any time rate of volume or distance.
If you're talking electrical current, then the unit is almost certainly 'Amperes' .
which object has a net force of -68
It is difficult to identify a specific object with a net force of -68 without more detailed context. However, we can understand that net force is the vector sum of all forces acting on an object, and it is calculated using Newton's Second Law of Motion: F = ma.
Explanation:The question is about identifying an object with a net force of -68. A net force is the vector sum of all forces acting upon an object. In physics, negative force usually indicates that the force is acting in the opposite direction of the positive axis of a graph. It is challenging to precisely identify the object with a net force of -68 from the given information; we would need more detailed context such as the direction the force is applied or the object's mass. However, the principle of net force can be described using Newton's Second Law of Motion, which states F = ma where F is the net force, m is the mass, and a is the acceleration.
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The object with a net force of -68 N can be determined by considering the vector sum of the forces acting on it. In this case, the net force is approximately 73.76 N and directed at an angle of about 59.9 degrees below the negative x-axis.
Explanation:The object with a net force of -68 N can be determined by considering the forces acting on it.
A free-body diagram shows a northward force of 64 N and a westward force of 38 N.
The net force is the vector sum of the two forces, which can be found using the Pythagorean theorem.
In this case, the net force is approximately 73.76 N and directed at an angle of about 59.9 degrees below the negative x-axis.
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When a chemical reaction occurs,
A.) reactants interact to form products with different chemical and physical properties
B.) reactants interact to form products with different numbers of atoms
C.) products react to form several reactants with different chemical properties
d=1/2at^2
solve for a
Answer:
a = 2d / t²
Explanation:
d = ½ at²
Multiply both sides by 2:
2d = at²
Divide both sides by t²:
a = 2d / t²
The solution of the acceleration a would be (2dt²) by using the equation d=1/2at²
What are the three equations of motion?Newton provided three equations of motion.
This is how the first equation is presented.
v = u + at
The second equation is given as follows.
d= ut + 1/2×a×t²
Following is the third equation.
v² - u² = 2×a×d
Keep in mind that only uniform acceleration is supported by these equations. where the initial and final velocities, respectively, are u and v.
d is the object's overall distance traveled, and a represents its acceleration.
As given in the problem we have to solve the acceleration by using newtons second equation given that the initial velocity is zero
By using The second equation is given as follows.
d = ut + 1/2×a×t²
as u =0
d=1/2at²
a = d/(1/ 2t²)
a =2dt²
Thus, The solution of the acceleration a would be (2dt²) by using the equation d=1/2at²
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A scientific theory
1)Holds the highest level of acceptance
2)Explains a number of facts
3)Uses specific hypotheses and descriptive laws that have been well-tested
4)All of the above
5)None of the above
Answer: 4
Explanation: the scientific theory i believe can do all of the answer that are listed above
Answer: 4)All of the above
Explanation:
A scientific theory is the detailed explanation for the cause of natural process, natural event occurring in the world. It can be tested on the basis of the experimental trials, and direct observations. Thus this holds the validity in results and accepted by the entire scientific community.
It holds the highest level of acceptance from all over the world and especially by the scientific communities. It also explains a number of facts those were unknown. The theory is supported by the descriptive laws and a hypothesis is created in before the actual generation of the theory so as to prove the facts experimentally.
Which state of matter has the greatest amount of particle movement?
Answer:
The state of matter that has the most energy is gas.
Explanation:
In a solid, there is limited room for molecules to move around.
Answer:
The greatest amount of particle movement is in gaseous state of matter.
Explanation:
It is known that matter can be classified as solid, liquid and gas states. The molecules in each state exhibit vibrations or movement of particles will be occurring in them. The kinetic energy exhibited by the different states of matter depend upon the bond strength.
If the bond strength is more and if the particles are densely packed like in solids. So the gas state has least bond strength and they are loosely packed molecules and thus the particles can move freely with more kinetic energy.
What are 5 most important facts should be known the movement of heat energy?
Explanation:
heat energy is the movement of molecules or atoms in solids, liquids and gases.
facts about movement of heat energy.
1) heat energy transferred through three main processes that are: conduction , convention and radiations.
2) our earth absorbs energy coming from sun through radiation.
3) entire universe is made up of atoms when they moves they transfer heat.
4) heat energy can change the state of matter as it causes melting.when a solid such as ice absorb heat energy it convert into liquid.
5) heat energy keeps moving until both objects reach at same temperature.
The movement of heat energy involves thermal conductivity, heat transfer methods, specific heat, conservation of energy, and spontaneous heat transfer. These fundamental principles explain how heat energy moves and transforms within systems. Understanding these concepts is crucial in practical applications such as cooking and climate control.
The movement of heat energy, also known as heat transfer, is a fundamental topic in physics. Here are the five most important facts to know:
Thermal Conductivity: Matter has a property called thermal conductivity that determines how well it can transfer heat. For example, metals generally have high thermal conductivity, making them good conductors of heat.Heat Transfer Methods: Heat energy can be transferred through conduction, convection, and radiation. Conduction occurs in solids where molecules transfer energy by vibrating in place, convection occurs in fluids (liquids and gases) through the movement of the fluid itself, and radiation involves the transfer of heat through electromagnetic waves.Specific Heat: The specific heat of a substance indicates how much energy is required to raise the temperature of one gram of the substance by one degree Celsius. For instance, water has a high specific heat, meaning it requires more energy to heat up or cool down compared to many other substances.Conservation of Energy: According to the law of conservation of energy, energy cannot be created or destroyed, only transferred or converted from one form to another. This principle is crucial in understanding how heat energy moves and transforms within systems.Spontaneous Heat Transfer: Energy is transferred spontaneously from a higher temperature system to a lower temperature system. This is the fundamental process of heat transfer known as heat flow.These concepts are essential for understanding various physical phenomena and applications, such as cooking, climate control, and engineering systems.
how can you increase the intensity of sound waves
Answer
The intensity of a sound wave depends on the pressure of the wave,density of the medium and speed of sound in the medium. Higher density and higher sound speed both give a lower intensity. and may be it is because that sound wave is more characterize by wavelength than frequency..explanation
Explanation:
As decibel levels get higher, sound waves have greater intensity and sounds are louder. For every 10-decibel increase in the intensity of sound, loudness is 10 times greater. Intensity of sound results from two factors: the amplitude of the sound waves and how far they have traveled from the source of the sound.
Final answer:
The intensity of sound waves can be increased by raising the amplitude of the wave oscillations, which can be done by increasing the volume on the speaker or enhancing the instrument's playing technique, such as pressing a bow more firmly against stringed instrument strings.
Explanation:
To increase the intensity of sound waves, one can manipulate several factors. The intensity (I) of a sound wave is directly proportional to the square of its amplitude (Δp) and inversely proportional to the density (p) and the speed (vw) at which the wave travels, as per the equation I = (Δp)2 / (2pvw). Therefore, increasing the amplitude of sound wave oscillations will result in a more intense sound. This can be achieved, for example, by increasing the volume on a speaker, which increases the amplitude of the sound waves it produces.
Additionally, when sound travels through a medium such as a string, the medium's tension can affect sound intensity. A tight string will transmit sound waves more efficiently than a loose one. Similarly, when a bow is pressed more firmly against the strings of a musical instrument, the increased normal force results in a higher frictional force, which in turn increases the work done (W = Fd) and subsequently the amplitude of the produced sound wave.
It's also important to note that the amplitude and loudness of a sound wave are related; a wave with larger amplitude typically sounds louder because it carries more energy. The energy carried by a wave is proportional to the amplitude squared, meaning doubling the amplitude increases the power by a factor of four. Moreover, the frequency of the sound also impacts the energy reaching your ear, as higher frequency sound waves make the same amplitude hit your eardrum more often.
If the change in position Dx is related to velocity v (with units of m/s) in the equation Dx=Av, the constant A has which dimension ?
Answer: seconds
Explanation:
We have the following equation:
[tex]Dx=A.V[/tex]
Where [tex]Dx[/tex] has unit of meters ([tex]m[/tex]) and [tex]V[/tex] has units of meters per second ([tex]m/s[/tex]).
If we input these units in the equation, we will have:
[tex]m=A(m/s)[/tex]
Clearing [tex]A[/tex]:
[tex]A=\frac{m.s}{m}=s[/tex]
Hence [tex]A[/tex] is related to time, and its unit in this case is second.
What is a difference between physical traits and personality traits?
A. Physical traits are mainly determined by a person's environment; personality traits are
determined by both a person's genes and environment.
B. Physical traits are mainly determined by a person's genes, personality traits are
determined by both a person's genes and environment.
C. Physical traits are mainly determined by a person's genes and environment;
personality traits not determined by either a person's genes or environment.
D. Physical traits are mainly determined by a person's genes; personality traits are
determined by genetically engineered food that a person eats.
Answer:
A physical trait is visible to the naked eye, such as, having six fingers; and a character trait is invisible to the naked eye, such as, being charming. Both can be subjective, for instance, claiming somebody has a big nose is a subjective comment about somebody's physical appearance.
The difference between physical traits and personality traits are that physical traits are mainly determined by a person’s genes, personality traits are determined by both a person’s genes and environment.
Answer: Option B
Explanation:
Physical traits are facial similarities, body language, nature of hairs and skins. Mostly the face of siblings and the children will have some similarities with their parents or other members in their family.
So, we can say that physical traits are mainly determined by person’s genes. While the personality traits determine a person’s character , hobbies, likes, dislikes, point of view etc.
Thereby, the personality traits will be coming from genes and also from the environment the person has been grown. Both genes and environment effect equally on a persons’ character and personality.
What are two examples of observations you might make, and two examples of inferences you might make, when looking at logs burning in a campfire?
Answer:
One observation would be the change in odor when observing the logs burning in a campfire and because of that a inference could be because a change in odor is occurring, a chemical change is happening to the logs (combustion).
A second observation would be that the wood being burned gave off smoke at first but then stopped and because of that a inference would be that the compound that were being burned creating the smoke was all evaporated from the wood.
6. What does the slope of a velocity-time graph indicate?
The slope of a velocity-time graph represents the acceleration of an object.
Acceleration is the rate of change of velocity over time. A steeper slope indicates a greater acceleration, meaning the object is speeding up or slowing down more rapidly.
A horizontal line on the graph, where the slope is zero, indicates constant velocity, implying no acceleration. If the slope is negative, the object is decelerating or moving in the opposite direction. In summary, the slope of a velocity-time graph provides valuable information about how an object's velocity changes over time, offering insights into its acceleration or deceleration behavior.
An atom has 18 protons, 18 electrons, and 20 neutrons.
This atom has ?
a negative charge
an atomic number of 20
a mass number of 38
a positive charge
Answer:
mass number of 38
Explanation:
Charge is 0 - No. of protons is equal to nom.of electrons, so no charge
Atomic number is 18 - Atomic number is number of protons
Mass number is 38- mass number is number of protons AND neutrons
Answer:
a mass number of 38
Explanation:
X This atom has no a negative charge .
because, number of protons (18) & electrons (18) are same. so,This atom is neutral.
X This atom has an atomic number of 20.
Because, it has 18 protons. so, This atom has an atomic number of 18.
X This atom has a positive charge
because, number of protons (18) & electrons (18) are same.so,This atom is neutral.
Select the correct answer.
Based on the law of conservation of energy, which statement is false?
O A.
Energy is lost when machines don't work right.
OB. We can't add more energy to the universe.
O c. We can't destroy energy that exists in the universe.
O D.
Energy changes from one form to another.
Answer:
A. Energy is lost when machines don't work right.
Explanation:
Energy cannot be created nor destroyed, according to the Law of Conservation of Energy.
the speed of sound is 344 m/s. you see a flash of lightning and then hear the thunder 1.5 seconds later. how far away from the lightning strike are you?
Answer: 516 m
Explanation:
Speed [tex]V[/tex] is defined as the distance traveled [tex]d[/tex] in a especific time [tex]t[/tex]:
[tex]V=\frac{d}{t}[/tex]
Where:
[tex]V=344 m/s[/tex] is the speed of sound
[tex]t=1.5 s[/tex] the time you hear the thunder after you see the flash of lightning
We need to find the distance at which you are from the lightning strike:
[tex]344 m/s=\frac{d}{1.5 s}[/tex]
Finding [tex]d[/tex]:
[tex]d=(344 m/s)(1.5 s)[/tex]
Finally:
[tex]d=516 m[/tex]
Final answer:
To calculate the distance of a lightning strike using the sound of thunder, multiply the time delay of 1.5 seconds by the speed of sound (344 m/s), giving an answer of 516 meters or approximately 0.516 kilometers.
Explanation:
When observing a lightning strike, we often witness the light (the flash) well before we hear the sound (thunder) due to the speed of light being much faster than the speed of sound. In the given scenario, if you hear thunder 1.5 seconds after seeing a flash, we can calculate the distance to the lightning strike by multiplying the time it took to hear the thunder by the speed of sound in air.
Since the speed of sound is approximately 344 m/s, we can estimate the distance to the lightning strike with the following calculation:
Distance = Speed of Sound × Time Delay
Distance = 344 m/s × 1.5 s
Distance = 516 m
Converted to kilometers, the lightning strike was approximately 0.516 km away from you.
The process which a solid changes to a liquid
Melting
Explanation:
This process is called melting in which a solid changes to a liquid
possible data where using a bar graph
would be better than using a line graph.
Answer:
Make a graph that represents exotic pet ownership in the United States. There are 8,000,000 fish, 1,500,000 rabbits, 1,300,000 turtles, 1,000,000 poultry and 900,000 hamsters.
Explanation:
The biggest difference is that bar graphs are more versatile while line graphs are better for showing trends over time or another measure with a logical progression of values (such as distance from a given point). Bar graphs can also show frequency distributions (how often you observe different outcomes) much more effectively than line graphs.
Line charts should be used only for time series (chronological) or when there is some other sequence to the dimensions on the x-axis, e.g. dates, months, sequence of stages of a project, sequence of meters along on a gas pipeline, and they should be used to detect trends and patterns, not to give people exact quantitative readings.
Bar charts should be used for comparing specific x-axis values, though they can certainly be used for time series, like line charts. They can also be used to display parts of a whole in favor of pie charts, in which case, the space between the bars should be reduced.
Pls help I rlly don’t understand
Answer: Over time, the objects velocity or speed over time is gradually increasing. For the second one, the line is also showing that the rate at which the objects velocity is increased is constant, since the slope is constant.
3. Land iguanas in the Galápagos are examples of ____________
species found only in one geographic region
Answer:
There are three species of land iguana found in the Galapagos Islands. The well-known yellowish land iguanas include Conolophus subcristatus, native to six islands, and Conolophus pallidus, found only on the island of Santa Fe.
9. If a rocket flies north 390 meters in 6 seconds, what is its velocity?
Answer:
65 m/s north
Explanation:
The velocity of an object is given by:
[tex]v=\frac{d}{t}[/tex]
where
d is the displacement of the object
t is the time interval needed for the displacement
For the rocket in this problem,
d = 390 m north
t = 6 s
So the velocity is
[tex]v=\frac{390}{6}=65 m/s[/tex] north
It is important to keep in mind that velocity is a vector, so it both has a magnitude (65 m/s) and a direction (which is equivalent to that of the displacement, so in this case north).
Melanie watched the path a baseball followed after a pitcher threw it. She noticed that the ball traveled horizontally away from the pitcher as well as downward toward the ground. What force caused the ball to accelerate in the downward direction when it was thrown?
Answer:gravity
Explanation:
Gravity is the force that causes a baseball to accelerate downward when thrown, resulting in a constant negative vertical acceleration that contributes to the ball's parabolic trajectory.
Explanation:The force that causes a baseball to accelerate downward when thrown is gravity. Despite the ball traveling horizontally away from the pitcher, gravity acts downwards upon the ball from the moment it leaves the pitcher's hand until it contacts the ground. This creates a parabolic trajectory, characterized by a vertical acceleration that is constant over time, as indicated by the ball's motion being split into two perpendicular components: horizontal motion due to the initial throw, and vertical motion due to the force of gravity.
The graph of the ball's vertical acceleration versus time would show a negative value that remains constant, representing the unchanging acceleration due to gravity in the downward direction, which is typically approximately -9.8 m/s2 near Earth's surface. This downward acceleration is independent of the ball's horizontal velocity.
calculate the speed of the wave with the frequency of 10khz and wavelength of 2m
speed = wavelength × frequency
but the frequency was given to as
10khz ,
which means
[tex] {10}^{3} [/tex]
= 1000
so now frequency = 1000hz
substitute it into the equation
speed = 1000×2
speed = 2000ms^-1
The speed of the wave with the frequency of 10 kHz and a wavelength of 2 meters is 20,000 meters per second, or 20 km/s.
Explanation:To calculate the speed of a wave, we can use this simple physics formula: speed = frequency × wavelength. In this case, the frequency of the wave is 10 kHz (or 10,000 Hz) and wavelength is 2 meters. Knowing these values, we can substitute them into the formula.
Speed = 10,000 Hz × 2 meters
Therefore, the speed of the wave is 20,000 meters per second, or 20 km/s.
The speed of the wave with the frequency of 10 kHz and a wavelength of 2 meters is 20,000 meters per second, or 20 km/s.
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The masses of two metal blocks are measured. Block A has a mass of 8.45 g and Block B has a mass of 45.87 g. How many significant digits are expressed in these measurements? What is the total mass of block A plus block B? What is the number of significant digits for the total mass?
Answer:
3 sig figs total mass is 54.32g
Explanation:
It is 3 sig figs because that is the accuracy that Block A was measured to
A rock is dropped from the edge of a cliff 15.0 m high. How long does it take to reach the bottom of the cliff?
Answer:
1.75 s
Explanation:
The vertical position of the rock at time t is given by:
[tex]y(t) = h +ut - \frac{1}{2}gt^2[/tex]
where
h = 15.0 m is the initial height
u = 0 is the initial velocity
g = 9.8 m/s^2 is the acceleration of gravity
t is the time
When the rock reaches the bottom of the cliff,
y(t) = 0
Substituting this condition into the previous equation, we can find the time at which the rock reaches the bottom of the cliff:
[tex]0 = h - \frac{1}{2}gt^2\\t= \sqrt{\frac{2h}{g}}=\sqrt{\frac{2(15.0)}{9.8}}=1.75 s[/tex]
Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?
Answer:
a drought
Explanation:
bullfrogs would only need to store more water if they would go longer periods of time without it - think about how cacti store all the water they can in desert, since there is not a lot of water there.
You throw a ball upward with a speed of 14 m/s. What is the acceleration of the ball after it leaves your hand?
Answer:
g = -9.8 m/s²
Explanation:
Gravity is the only force pulling on any object in free fall. Gravity near earth's surface pulls with an acceleration g.
The acceleration of the ball is -9.8 meter per sec square acting as deceleration when the ball left the hand after being thrown upwards.
Explanation:
The ball is thrown with a speed of 14 m/s and the moment it comes into the projectile, gravity starts to work on it. The gravity applies the uniform acceleration of 9.8 m/s^2.
This acceleration is in the form of deceleration [the negative acceleration] is termed as the deceleration. And here, the ball is thrown opposite to the gravity and hence the motion is against the gravity, the acceleration becomes -9.8 m/s^2.
Graph y=2 line find value of y when x =5
Explanation:
y=2 is a straight horizontal line through the point y=2.
As such for all x-values, the y-value will be the same which is y=2 in this case.
LOOK AT THE EQUATION !
The equation tells everything that Y depends on, and what the exact value of Y is for every possible value of all the things that it depends on.
THIS equation says: "The value of Y depends on '2'. At every moment, no matter what the value of '2' is, Y is equal to it."
The equation tells you that.
So now, we can actually tell the future ! We know that the value of '2' is always going to be TWO. If we use the powerful equation that we have, we know that Y is always going to be TWO.
Does the value of Y depend on the value of X ? If it does, then X must be there on the right side of the equation. But X is not there ! That means that X has no influence on the value of Y. Y is always 2 !
You say X=5 ? That's nice. Who cares ? ! ? It has no influence on Y . Y is ALWAYS 2 .
a substance has a melting point of 0°C and a boiling point of 100°F. The substance is most likely..
1.) Water
2.) Hydrogen
3.) Gold
4.) Table Salt
8. If a car is going 10 m/s and 4 seconds later it is going 18 m/s, what is its acceleration!
Answer:
2 m/s²
Explanation:
Acceleration is change in velocity over change in time.
a = Δv / Δt
a = (18 m/s − 10 m/s) / 4 s
a = 2 m/s²
The acceleration of a car going 10 m/s and 4 seconds later it is going 18 m/s is 2m/s².
HOW TO CALCULATE ACCELERATION:
The acceleration of a moving body can be calculated using the following formula:a = (v - u)/tWhere;
a = acceleration (m/s²)v = final velocity (m/s)u = initial velocity (m/s)t = time (seconds)According to this question, a car is going 10 m/s and 4 seconds later it is going 18 m/s. The acceleration can be calculated as follows: a = (18m/s - 10m/s)/4a = 8/4a = 2m/s²Therefore, the acceleration of a car going 10 m/s and 4 seconds later it is going 18 m/s is 2m/s².Learn more about calculating acceleration at: https://brainly.com/question/19573976?referrer=searchResults