A construction worker pushes a wheelbarrow with a total mass of 50.0kg. What is the acceleration of the wheelbarrow if the net force on it is 75 N West?
The acceleration of a 50.0 kg wheelbarrow pushed with a net force of 75 N west is calculated using Newton's second law of motion to be 1.5 m/s² west.
To calculate the acceleration of a wheelbarrow with a mass of 50.0 kg being pushed with a net force of 75 N west, we can use Newton's second law of motion. This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass, which can be represented by the formula a = F/m, where a is acceleration, F is force, and m is mass.
Given a net force of 75 N west and a mass of 50.0 kg, the acceleration can be calculated as follows:
a = F/ma = 75 N / 50.0 kga = 1.5 m/s² westTherefore, the acceleration of the wheelbarrow is 1.5 meters per second squared in the westward direction.
What is the role of the respiratory system?
a.
to bring water into the body
b.
to bring oxygen into the body
c.
to bring carbon dioxide into the body
d.
none of the above
What tactics does a financial planner apply to deal with a difficult client
There are many different solutions to dealing with a difficult client. For example, you can release them which means you transfer them to another firm so you won't have to deal with them. If you want to keep the client, you can change the way in which you bill them. Another option is to be direct and polite at the same time. Lastly, use a team approach so other people in that firm get to work with that same client.
Compare and contrast an electric discharge with an electric current
Darrell is trying to remove a nail from a board using the claw of a hammer, but the nail is stuck. Which of the following could Darrell do to make the job easier?
A.
Use a hammer with a longer handle.
B.
Use a heavier hammer.
C.
Use a hammer with a shorter handle.
D.
Use a hammer with a sharper claw.
It's C loves! I just got it right.
Answer: The answer is c
A body has translatory motion if it moves along a
¿como se clasifican las leyes que intervienen en la ocurrencia de los fenomenos fisicos?
A .5 kg toy train car moving forward at 3 m/s collides with and sticks to a .8 kg toy car that is traveling at 2 m/s what is the final velocity of the two cars round to the nearest 10th
An object's mass is a measure of how much matter makes it up. An object's weight is a measure of the gravitational force that acts on it. An object's mass is always _______ its weight.
A. proportional to
B. equal to
C. half of
D. double
An object's mass is proportional to its weight. So the correct answer would be an option (A) proportional to.
What are fundamental forces?At the considerable fundamental level, all the forces in the existence (as currently understood) are emanated from only four forces:
The gravitational force
The electromagnetic force
The weak nuclear force
The strong nuclear force
An object's mass is proportional to its weight because weight is determined by the gravitational force acting on an object, which is directly proportional to the object's mass.
Specifically, an object's weight is equal to its mass multiplied by the acceleration due to gravity.
Therefore, if the mass of an object increases, its weight will increase proportionally, and if the mass decreases, the weight will decrease proportionally as well.
Therefore, the correct answer would be option (A) proportional to.
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Which of the following situations would cause light to refract? A. traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water
Light refraction occurs when light passes from one medium to another, leading to a change in its direction. In the given options, this phenomenon would be observed when light moves from air to water, causing it to slow down and bend. This refraction is what makes objects look distorted when viewed through water.
The correct option is D.
The phenomenon of light refraction occurs when light passes from one medium to another, causing a change in its direction. Due to the dissimilar densities of different media, the speed and direction of light are affected, leading to its refraction. Specifically, between the four options given, the situation that would cause light to refract is when light is moving from air to water (option D).
As demonstrated in figure 2.4 (a), when light transfers from air (a less dense medium) to water (a denser medium), it slows down and its path bends, resulting in refraction. This change of direction is why objects often appear distorted or misaligned when observed through water.
While light can also refract when passing from one glass block to another (option B), this situation wasn't presented in the original question. Similarly, reflected light differs from refracted light in that it bounces off surfaces while refracted light bends when transitioning between different media.
Hence The correct option is D.
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Refraction occurs when light moves from one medium to another with a different density, causing it to bend. The correct situation where refraction happens is when light moves from air to water. Examples of refraction include light passing through a prism and a bent appearance of a straw in water.
Refraction is the bending of light rays as they pass from one medium to another with a different density. This occurs due to a change in the speed of light between the two media, causing the light rays to change direction.
Among the given options, the situation that would cause light to refract is moving from air to water.
This phenomenon happens because light travels at different speeds in different media. When light passes from air (a less dense medium) into water (a denser medium), its speed decreases, and it bends towards the normal line at the boundary between the two media.
The correct answer is:
D. moving from air to waterExamples of Refraction:
1. When light passes through a prism, it refracts, separating into different colors.
2. A straw appears bent when partially submerged in water due to refraction.
In summary, D) moving from air water, causes would cause light to refract.
How much data can a digital wave send. (The maximum data)
What has occured when bubbles form in a liquid that is being heated
Bubbles form in a liquid being heated when it reaches its boiling point, due to the expansion of water vapor and air within them.
When bubbles form in a liquid that is being heated, such as water, this is an indication that the liquid is reaching its boiling point. Water and other liquids contain dissolved air and impurities, which become visible as small bubbles at lower temperatures. As the temperature of the liquid increases, the water vapor inside these bubbles expands. The boiling process starts when the vapor pressure inside the bubbles is equal to the atmospheric pressure. At this point, usually 100°C for water at sea level, bubbles grow rapidly in size increasing the buoyant force, causing them to rise to the surface and release their vapor in a process commonly referred to as boiling. To prevent bumping, a phenomenon where the liquid can boil violently, a boiling chip or a stirring rod can be used to provide nucleation sites for bubble formation.
Sometimes a liquid can become superheated, reaching a temperature at which it should be a gas without actually boiling. This condition is unstable and the liquid may boil suddenly, sometimes even explosively. Disturbance or introduction of nucleation sites can initiate boiling in superheated liquids.
What happens to a current when it comes in contact with a continent or landmass?
What is an ion found in a glass of water
Answer:
[tex]H^{+}[/tex] ion and [tex]OH^{-}[/tex] ions.
Explanation:
As we notice the glass of water, in this observation we find that the glass also made up of sodium silicate which will give us oxygen ion.
And the water which is present in the glass will break into the hydroxyl ion and [tex]H^{+}[/tex] ion .
Therefore, glass of water contains [tex]H^{+}[/tex] ion and [tex]OH^{-}[/tex] ions.
An ion commonly found in a glass of water is the hydrogen ion (H+).
How does this happen?When water molecules dissociate, a small fraction of them break apart into hydrogen ions (H+) and hydroxide ions (OH-). These ions are responsible for the water's ability to conduct electricity.
The presence of hydrogen ions in water makes it slightly acidic, with a pH below 7. However, the concentration of hydrogen ions in pure water is very low, making it close to neutral on the pH scale. The balance of these ions is essential for maintaining the pH and chemical properties of water.
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If stretching is done during the cool-down, it can help the muscle _____.
Can you help me with question one?
How do i do this?
Draw a Punnett square in your assignment worksheet that shows the results of a cross between a homozygous red bull (RR) and a heterozygous red cow (Rr). Be certain to title your Punnett square and indicate each parent.
Answer:
| R | R
R | RR | RR
r | Rr | Rr
Explanation:
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment.
At the top of the square you have to put the genetic contribution of one parent and at the leftmost column, the genetic contribution of other parent. And then make the combinations, as follows:
| R | R
R | RR | RR
r | Rr | Rr
Why does an ice cube melt when you hold it in your hand? Question 1 options: Heat from the ice cube is transferred to your hand. The ice cube radiates heat to your hand. Your hand transfers temperature to the ice cube. Heat is transferred from your hand to the ice cube.
Four balls are dropped from a platform, 20 meters high. Which ball will experience the GREATEST change in kinetic energy, from platform to ground?
10 kg
20 kg
30 kg
40 kg
Answer:
D.) 40
Explanation: I toke the USA-Test-Prep interim for it and past. I do k12. the heavier the ball the more kinetic energy gained.
Which diagram best represents the relationship between the Earth and Sun that causes the changes in seasons on Earth?
Answer: third diagram
Explanation:
A computer draws a current of 10 amperes when plugged into a 220 volt socket. How much power does the computer have?
The power consumed by the computer is calculated using the formula for electric power, P = I X V. In this case, the power is 2200 watts.
To calculate the power consumed by the computer when it draws a current of 10 amperes and is plugged into a 220-volt socket, we use the formula for electric power (P), which is the product of current (I) and voltage (V). Therefore, we calculate the power as
P = I X V
P = 10 A X 220 V
P = 2200 W (watts) or 2.2 kW.
The horseshoe crab looks very similar to its fossil ancestor from the Jurassic era. Why has the horseshoe crab not evolved?
A. Its original form always remained well adapted to its environment.
B. The species was affected by natural selection.
C. The species did not pass on genetic information to its offspring.
D. The species underwent major mutations in a short period of time.
The answer is A. Natural selection always favors individuals in a population that are well adapted to their environment. These individuals are able to get to maturity and pass down their genes to subsequent generations. Any disadvantages mutations in the population are eliminated by natural selection.
Answer:
its a
A. Its original form always remained well adapted to its environment.
because it takes time to adapt to a new place
In what way do acids affect your body?
The Galilean moons are satellites of which planet?
which of the following terms relate to the meaning of "physical"
The term "physical" encompasses concepts such as mass, density, and physics, extending to health, geography, and the tangible aspects of reality, highlighting the diverse realms it influences.
The term "physical" encompasses various concepts and is associated with multiple terms that pertain to the tangible and material aspects of the world. Firstly, it refers to the properties and characteristics of matter, encompassing terms such as mass, density, and volume, which describe the fundamental attributes of physical objects. Additionally, the term is intricately linked with the field of physics, which explores the fundamental principles governing the behavior of matter and energy.
In the context of health and well-being, "physical" is often connected to terms like fitness, exercise, and bodily functions, highlighting the importance of maintaining a healthy and active lifestyle. It also extends to the realm of geography, involving terms such as physical geography, which examines the natural features of the Earth's surface like landforms, climate, and ecosystems.
Moreover, in the context of reality and existence, "physical" contrasts with the abstract, incorporating terms like metaphysical to describe aspects beyond the material world. The term is also used in the context of examinations, where a physical exam assesses a person's bodily health through direct observation and palpation.
In summary, the term "physical" encompasses a spectrum of concepts, ranging from the fundamental attributes of matter and principles of physics to health, geography, and the tangible aspects of reality.
The question probable may be:
What terms are associated with the meaning of "physical"?
The terms that relate to the meaning of 'physical' is body and matter. Option C and E
The terms that relate to the meaning of "physical" are:
bodymatterThese terms are associated with the physical aspect of the world, encompassing the laws governing the natural world, the tangible structure of the body, and the substance of matter.
Terms like "mind," "emotions," "gravity," and "spiritual" are more aligned with aspects beyond the purely physical and may involve mental, emotional, or spiritual dimensions.
Complete question:
Which of the following terms relate to the meaning of "physical"?
natural laws
mind
body
emotions
matter
gravity
spiritual
Once the magma found at location "E" cools and crystalizes, it will
Answer:turn into stone. this will cause erosion for magma to turn to stone
Explanation:
The cooled lava pools on the surface of a crater are called what?
1. Craters
2. Terrae
3. Maria
4. Reoglith
Currently, new regulations control the use of pesticides and chemical fertilizers to reduce what? A. Water contamination B. Insect population C. Crop sizes D. Illness
its A. water contamination
Over use of pesticides and fertilizers results in contamination of water and air as well as they cause severe health issues when exposed to them. Currently, regulations are controlling the use of these chemicals to reduce water contamination.
What are pesticides?Pesticides are chemical compounds used to kill pests. It is important to control the population of pests and insects which badly affects the crops. However pesticides cannot be used in over dosage it will affect the living.
Fertilizers are used to fertilize the soil to help for the growth of crops. They also contains toxic chemicals.
Both fertilizers and pesticides contains hazardous and toxic chemicals. They chemicals definitely will result in pollution of water and air and causes healthy issues for surrounding organisms.
Water contamination is a serious issues that we are all addressing for long while. Reducing the use of pesticide and fertilizers can decline water pollution up to an extend. Hence, option A is correct.
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A television of mass 13 kg sits on a shelf. What is the normal force acting on the television?
A. 13.0 N
B. 127 N
C. 51.2 N
D. 99.4 N
Answer:
Normal force, F = 127 N
Explanation:
It is given that,
Mass of the television, m = 13 kg
It is sitting on the shelf. We have to find the normal force acting on it. The forces acting on it are normal force and its weight. So, the normal force is given by :
F = mg
g = acceleration due to gravity
[tex]N=13\ kg\times 9.8\ m/s^2[/tex]
F = 127.4 Newton
or
F = 127 N
Hence, the normal force acting on the television is 127 N
The three forces acting on a hot-air balloon that is moving vertically are its weight, the force due to air resistance and the upthrust force. The hot-air balloon descends vertically at constant speed. The force of air resistance on the balloon is F. Which weight of material must be released from the balloon so that it ascends vertically at the same constant speed? A F B 2F C 3F D 4F
Explanation :
The forces acting on hot- air balloon are:
Weight, (W)
Force due to air resistance, (F)
Upthrust force, (U)
Its weight W is acting in downward direction. The upthrust force U acts in upward direction. When the balloon is moving upward, the air resistance is in downward and vice versa.
In this case, the hot-air balloon descends vertically at constant speed.
so, [tex]a=0[/tex]
and [tex]F=ma=0[/tex]
so, [tex]W = F + U[/tex] ....................(1)
when it is ascending let the weight that it is releasing is R, so
[tex](W-R) + F = U[/tex]..........(2)
solving equation (1) and (2)
[tex](W-R)+F=W-F[/tex]
[tex]R=2F[/tex]
2F is the weight of material that must be released from the balloon so that it ascends vertically at the same constant speed.
Answer: (B) .2 F
Explanation :
The weight is always downward and it is a constant.
The upthrust fore U acts upward and it has always same value as it depend on the difference in height between the top and bottom surface of the air balloon.
The direction of the force due to air resistance depends on the motion and air resistance always opposite motion. air resistance downwards that means the air balloon will ascending and air balloon will descending then air resistance is upwards.
So, air resistance depends on speed .
When air balloon descending at constant speed
Air resistance = F
A constant speed means acceleration is zero that means the resultant force is zero.
W = F + U.....(I)
When air balloon ascending
air resistance = F downwards
Some weight of the material needs to be released for the resultant force to be zero.
Suppose, the weight to be released be R.
(W - R) + F = U......(II)
From equation (I)
U = W- F....(III)
The upthrust force has same value throughout the motion.
Now, put the value of U in equation (I)
W - R + F = W - F
-R = - F - F
R = 2 F
Hence, this is the required solution.