Answer:
Stereotypes are widely held beliefs that people have certain traits because they belong to a particular group stereotypes are often in accurate and frequently portray the members of less powerful less controlling groups or negatively and members of more powerful more controlling groups.
state the following: Boyle's law and Charle's law
Boyle's law states that the volume of a given mass of gas is inversely proportional to the pressure provided that the temperature remains constant.
Charle's law states that the volume of a given mass of gas is directly proportional to temperature provided that the pressur remains constant.
Boyle's Law is a law stating that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature
state an advantage of using such hydraulic jack to lift a load
Answer:
Explanation:
You are going to lift and press down on the 200 N many times and move only a short distance. The reward is that slowly but surely you will lift a very heavy load -- one that cannot be managed any other way but by the hydraulic jack.
If this plastic cup is heated to its melting
point, what will eventually happen to all
the particles in the plastic?
A. The particles will begin to move enough
that they slide past each other.
B. Bonds will form and the liquid will become
a solid.
C. The spaces between the particles will get
smaller.
D. The particles will change state and become
a crystalline solid.
Answer:
A. The particles will begin to move enough
that they slide past each other.
Explanation:
When the plastic cup is heated, the Kinetic energy of its particles starts increasing. As the temperature rises, the kinetic energy keeps increasing. With the increase of K.E, the particles start moving faster and faster. When the temperature finally reaches the melting point, the K.E of the molecules is enough to break the bonds and slide past each other.
How much heat is absorbed by 41 g iron skillet when its temperature varies from 9°C. to 20°C
Answer:
202.95J
Explanation:
The formulae for the energy absorbed by the iron skillet is;
q=m*c*ΔФ where q=energy absorbed, m is mass of iron skillet, c is specific heat capacity and ΔФ is change in temperature
Given that;
m= 41g
ΔФ=20°-9°=11°
c=0.45 J/g°C
q= 41×0.45×11
q= 202.95 J
The proper order of the cycle of addiction is
Answer:
The answer would be drug use, addiction, dependence, tolerance, and withdrawal.
Answer:
D. drug use, tolerance, dependence, addiction, and then withdrawal
Explanation: took the test rn on edge 2020
Maya sets up two experiments as shown. What question is Maya most likely trying to answer? How does the type of material used in the core affect the strength of an electromagnet? How does the number of loops of wire affect the strength of an electromagnet? How does the speed at which an iron bar is removed from wire loops affect the strength of an electromagnet? How does the thickness of the wire affect the strength of an electromagnet?
Answer:
D
Explanation:
The correct answer is D
How does the thickness of the wire affect the strength of an electromagnet?
Answer:
How does the thickness of the wire affect the strength of an electromagnet
Explanation:
Generally, electromagnet strength increases with an increase in wire thickness. From the theory of electric circuit, the resistance of an electric wire is inversely proportional to the cross sectional area of the electric wire. Mathematically, we have:
R ∝ 1/A
Where:
R is the resistance of the electric wire; A is the cross sectional area of the wire. Therefore, for a large cross sectional area, the resistance will be very low, and the electric current passing through the electromagnet will be high. This will create a very high magnetic field. Thus, the question that Maya will most likely answer is: How does the thickness of the wire affect the strength of an electromagnet.
A car has a velocity of 15 m/s.
It then accelerates at a rate of
3.5 m/s^2 for the next 5.0 seconds
what is its velocity?
Please help
Explanation:
Given:
v₀ = 15 m/s
a = 3.5 m/s²
t = 5.0 s
Find: v
v = at + v₀
v = (3.5 m/s²) (5.0 s) + 15 m/s
v = 32.5 m/s
The final velocity of the car, after accelerating at a rate of 3.5 m/s^2 for 5 seconds from an initial velocity of 15 m/s, is 32.5 m/s.
Explanation:The car's final velocity can be calculated using the formula for acceleration: final velocity = initial velocity + (acceleration x time). Here, the initial velocity is 15 m/s, the acceleration is 3.5 m/s^2, and the time is 5.0 seconds.
Substituting these values in the formula gives: final velocity = 15 m/s + (3.5 m/s^2 x 5.0 seconds) = 15 m/s + 17.5 m/s = 32.5 m/s. So, the car's velocity after 5 seconds of accelerating at a rate of 3.5 m/s^2 is 32.5 m/s.
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Find the magnitude of pressure in Pascal of 150N that acts normally on area. Of 0.25m2
Answer with Explanation:
When solving a problem in math, chemistry or physics, it is necessary to understand all the words and their definitions. If not, start with finding out their meanings, one by one.
Here the key word to know is pascal, (P), which is a unit of measure for pressure, defined as
pressure = Force / applied area
1 pascal = 1 newton / square metre or
1 P = 1 N/sq.m.
Here, we have been given:
Force = 150 N
Area = 0.25 m^2.
Thus the pressure
= Force / Area
= 150 N / 0.25 m^2
= 150/0.25 N/m^2
= 600 pascals.
[ note that the abbreviations are written in capitals, while the full words, units of measurement, are written without capitalization, since they are no longer proper names]
17. What's the role of the sun's
gravity in the solar system?
O A. Keeps the planets orbiting
around the sun
O B. Prevents the sun from falling into
a black hole
O C. Slowly pulls the planets toward
the sun
O D. Slowly pushes the planets away
from the sun
O Mark for review (Will be highlighted
on the review page)
Answer:
The purpose of the sun is to keep planets orbiting around it. Without the sun's gravity, the planets would not be orbiting around it, although it is impossible for a planet or a star or a planet to not have gravity. I hope you find this answer as the one you needed, please mark me as brainiest answer. Aka Answer A.)
Gravity is the property of every object that has mass. The gravity of the sun keeps the planets orbiting around the sun in the solar system.
What is Gravity?It is the force that attracts the less massive objects towards their center of mass. Sun also has huge gravity (Force), Hence it attracts the plates towards itself.Earth also has gravity, but very less than that of the sun. Hence the gravity cause planets to keep orbiting around the sun. Gravity is the least powerful force of the universe but it works up to a huge distance.Therefore, the gravity of the sun keeps the planets orbiting around the sun in the solar system.
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How much elastic potential energy is stored in a bungee cord with a spring constant of 10.0 N/m when the cord is stretched 2.00 m?
A. 10.0 J
B. 20.0 J
C. 40.0 J
D. 200 J
Elastic potential energy stored in bungee cord is 20.0 J.
Answer: Option B
Explanation:
The elastic potential energy is a form of potential energy stored in elastic materials. Generally potential energy is the energy of any object when it is at rest. But in materials possessing elastic properties, they store these potential energy in the form of elastic potential energy and it is used when the elastic materials undergoes elastic deformation.
For example, if we consider a spring, the elastic potential energy of the spring will be zero, when it is not deformed elastically i.e., when the spring is not stretched or compressed. But the same spring will be exhibiting elastic potential energy when the spring is stretched or compressed. So, the formula for elastic potential energy is
[tex]\text { Elastic potential energy }=\frac{1}{2} \times \text { spring constant } \times\left(\frac{\text {stretching}}{\text {compressing distance}}\right)^{2}[/tex]
In this case, as the spring constant of cord is given as 10 N/m and the stretching distance of the cord is given as 2 m, so the elastic potential energy stored in the cord will be
[tex]\text { Elastic potential energy }=\frac{1}{2} \times 10 \times(2)^{2}=\frac{1}{2} \times 10 \times 4 = 20 J[/tex]
V-I graphs for two wires A and B are shown in the figure. If we connect both the wires
one by one to the same battery which of the two will produce more heat per unit time?
Justify your answer
В
(2)
The acceleration due to gravity is ____.
The acceleration which is gained by an object because of gravitational force is called its acceleration due to gravity. Its SI unit is m/s2. Acceleration due to gravity is a vector, which means it has both a magnitude and a direction. The acceleration due to gravity at the surface of Earth is represented by the letter g. It has a standard value defined as 9.80665 m/s2.[ However, the actual acceleration of a body in free fall varies with location. (Wikipedia)
The acceleration due to gravity is 9.89 m / s2.
Explanation:
Gravity was discovered by Newton when he was sitting under a tree and was watching an apple reaching the ground instead of going upwards. He fond that there is a gravitational pull attached to the ground of the earth which makes all the objects towards the ground. It is represented by 'g' and its value is equal to 9.8 m /s2.
1,990,000,000,000,000,000,000,000,000,000 in scientific notation
Answer:
[tex]1.99 \times {10}^{30} [/tex]
Explanation:
Scientific notation should be in the form of
[tex]a \times {10}^{n} [/tex]
where
[tex]1 \leqslant a < 10[/tex]
a 230-newton box rests on a plank 5 meters long. One end is 1.2 meters higher than the other end. Find the components of the force the box exerts
Answer:
55.3 N, 223.3 N
Explanation:
First of all, we can find the angle of the inclined plane.
We have:
L = 5 m the length of the incline
h = 1.2 m is the height
We also have the relationship
[tex]h = L sin \theta[/tex]
where [tex]\theta[/tex] is the angle of the incline. Solving for the angle,
[tex]\theta= sin^{-1} (\frac{h}{L})=sin^{-1} (\frac{1.2 m}{5 m})=13.9^{\circ}[/tex]
Now we can find the components of the weight of the box, which is the force that the box exerts on the plank. Calling W = 230 N the weight of the box, we have:
- Component parallel to the incline:
[tex]W_{par} = W sin \theta = (230 N)(sin 13.9^{\circ}) =55.3 N[/tex]
- Component perpendicular to the incline:
[tex]W_{per} = W cos \theta = (230 N)(cos 13.9^{\circ}) =223.3 N[/tex]
The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?
Answer:
An on-camera flash is an indispensible accessory for many photographers; it provides additional light when conditions become too dark to handhold your camera comfortably, allows you to achieve more balanced exposures in daylight conditions, permits freezing of fast-moving subjects and can also be used to control or trigger other flash light sources. Additionally, a flash can be used as a highly effective creative tool to establish an aesthetic that elevates your imagery when lighting conditions are considered less than stellar. The benefits of an external on-camera flash far outweigh those provided by a built-in camera flash, while the only drawback is keeping an additional piece of equipment.
On-Camera Flash versus Off-Camera Flash versus In-Camera Flash
The term on-camera flash simply refers to a type of strobe light (flash) that can connect directly with your camera. While it is referred to as “on-camera” this does not require the flash to be physically mounted on your camera. On-camera flashes can, and often are, used off-camera. This differs from other strobe-light sources, such as studio pack strobes and monolights in that these types of strobes are not meant to be physically connected to your camera (except under rare and unusual circumstances involving convoluted methods of adaptation). Additionally, on-camera flashes usually have a self-contained power supply, although external power sources can sometimes be used to improve performance or battery life.
On-camera external flash also refers to the type of external flash that can be used on your camera, compared to a built-in flash that is integrated into many cameras. An on-camera external flash performs better than a built-in flash in almost every regard with the one exception that it is not built into your camera. The ability to take the flash off your camera results in a significantly greater number of lighting options; far more than simply providing a blast of flat light to the scene to facilitate an adequate exposure. It is often not desirable to have your flash pointed squarely at the scene at hand; more often than not you will want to bounce the flash light off other surfaces and point in other directions to control the look of your flash. When using an in-camera flash, you are forced to use the flash at the given angle from which it extends.
Most built-in flashes are also located near the camera lens, which can often result in the red-eye effect when photographing subjects in dimly lit conditions. Red-eye occurs because pupils dilate in dim light, the built-in flash is aligned with the lens's optical axis, its beam enters the eye and reflects back at the camera from the retina at the rear of the eye, which is quite red. Being able to use an on-camera flash source off-camera, from a different angle, will help to eliminate the red-eye effect in your photographs of people.
Guide Numbers, Manual Usage, Controlling Flash Power and Sync Speeds
Before delving into the automatic technology that is contained within most contemporary flashes, it is best to understand how to manually control and grasp a flash’s power. This is directly related to having an understanding of exposure ratios—how shutter speeds and apertures affect and balance each other—even though auto-exposure metering is available and often utilized for determining the best exposure settings.
Explanation:
Rita conducts an experiment on how the amount of precipitation each fall affects
the number of grasshoppers each spring. How should Rita organize her data?
Answer:
Explanation:
As spring season is a yearly phenomenon so, Rita should organize her data on yearly basis. Firstly, she should plan the procedure of her experiment and collect the data according to it. Secondly, identify the attribute of each object of her experiment. Thirdly, she can organize and segregate her data in tabular form, graphical form or diagrammatically.
Question 1 of 20 :
Select the best answer for the question.
1. Which objects are scattered
throughout the galactic halo that
surrounds the Milky Way?
O A. Superclusters
O B. Globular clusters
O C. Black holes
O D. Magellanic clouds
Answer:
B. Globular clusters
are scattered throughout the galactic halo that surrounds the Milky Way.
Explanation:
The metric unit of electrical power is the _____. watt volt ampere ohm
The answer is the second option "watt." Watt is the unit of power measured by one joule per second. Watts are a amount of electrical power and measured by the rate of energy transfer between two things.
Hope this helps.
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If you place a compass near an electrical current, explain what should happen and why
Due to electric current a magnetic field is generated. So when a compass is placed next to an electric field, it shows deviations.
The compass shows the direction of the North. Therefore the direction of the magnetic field can be found. This is found using the right hand rule.
Some metals have a molecular structure that makes them good conductors. Explain how understanding this relationship can help engineers make more powerful batteries
Good conductors can give us more electrical energy. Advanced batteries today use ion charges for the batteries.
knowledge of the relationship between the molecular structure of metals and their conductivity is invaluable for engineers developing more powerful batteries.
How do we explain?In many battery designs, the electrodes are made of metal materials such as lithium, copper, or aluminum. These metals have a crystalline structure that allows for the efficient flow of electrons. Understanding the molecular structure of these metals helps engineers select the best materials for the electrodes to ensure optimal electrical conductivity, which, in turn, leads to better battery performance.
Engineers need to consider the corrosion resistance of metal components in batteries. Some metals form protective oxide layers that prevent corrosion, extending the lifespan of the battery. A detailed understanding of the molecular structure and corrosion behavior of metals helps in selecting the most durable materials for battery components.
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using the given data table, calculate the acceleration of the skateboarder. you can use either form of the equation below?
The acceleration of the skateboarder on road A, road B and road C is 7,75 m/s² , 3,87 m/s² and 9,68 m/s².
Further Explanation
Given
mᴀ = mʙ = mᴄ = 62 kg
Fᴀ = 480N
Fʙ = 240 N
Fᴄ = 600 N
Asked
aᴀ, aʙ, aᴄ = ?
Solution
Based on the question, we know that the mass of road A, road B and road C are same. And, the formula of acceleration is
[tex]\boxed{\text{a} = \frac{\text{F}}{\text{m}}}[/tex]
so, we can calculate the acceleration of road A, road B and road C.
• for road A
[tex]\text{a}_A = \frac{\text{F}_A}{\text{m}}[/tex]
[tex]\text{a}_A = \frac{480 \text{N}}{\text{62 \text{kg}}}[/tex]
aᴀ = 7,7419 m/s²
aᴀ = 7,75 m/s²
• for road B
[tex]\text{a}_B = \frac{\text{F}_B}{\text{m}}[/tex]
[tex]\text{a}_B = \frac{240 \text{N}}{62 \text{kg}}[/tex]
aʙ = 3,8709 m/s²
aʙ = 3,87 m/s²
• for road C
[tex]\text{a}_C = \frac{\text{F}_C}{\text{m}}[/tex]
[tex]\text{a}_A = \frac{600 \text{N}}{62 \text{kg}}[/tex]
aᴄ = 9,6774 m/s²
aᴄ = 9,68 m/s²
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Learn More1. Learn More About The First Newton Law https://brainly.com/question/10454047
2. Learn More About Acceleration https://brainly.com/question/418785
-----------------------------
ANSWER DETAILGrade: Middle School
Subject: Physics
Chapter: Motion and Kinematics
Keywords: Motion, Mass, Acceleration, Newton, Newton Law, Force, Kinematics
To find the acceleration of the skateboarder, use the provided data and the equation: acceleration = (final velocity - initial velocity) / time. Plug in the values and ensure all units are consistent, then solve.
Explanation:To calculate the acceleration of the skateboarder, you need to use the data given in the table and the equations of motion. Assume the data provides initial velocity (Vi), final velocity (Vf), and time (t).
The acceleration can be calculated using the formula: acceleration (a) = (Vf - Vi) / t. Make sure the velocities are in the same units and the time is in seconds to get the acceleration in meters per second squared (m/s²).
Plug in the values from the table into this equation to find the acceleration. For instance, if Vi = 2 m/s, Vf = 4 m/s, and t = 1 s, Then the acceleration would be (4 m/s - 2 m/s) / 1 s = 2 m/s².
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Positively charged particles within the nucleus of an atom are _________. A. electrons B. protons C. neutrons
In fact, all particles (atoms and molecules) in nature contain an equal number of protons (plus charged basic particles) and electrons (minus charged basic particles). Therefore, it is natural that the particles are uncharged.
The positively charged particles within the nucleus of an atom are protons. So, the correct option is B. Protons. Protons carry a positive charge while neutrons within the nucleus are neutral.
The positively charged particles within the nucleus of an atom are protons. Protons carry a positive charge that is exactly equal in magnitude to the negative charge carried by electrons. In a neutral atom, the number of protons in the nucleus is balanced by the same number of electrons outside the nucleus. It is important to note that neutrons, which are also located in the nucleus, carry no charge (they are neutral).
To summarize the particles in the nucleus:
Protons: Positively charged
Neutrons: Neutral (no charge)
To move a heavy object, like a refrigerator what could be used to help decrease the frictional force?
Pick all that apply.
A. Remove everything in the refrigerator to lighten the load.
B. Put a lubricant between the surface of the object and the floor
C. Use round objects, like pencils , to decrease the friction and push the refrigerator over the pencils more easily
D. Use more force to push the refrigerator, with the help of a friend
(APEX)
Answer:
A. Remove everything in the refrigerator to lighten the load.
B. Put a lubricant between the surface of the object and the floor
C. Use round objects, like pencils , to decrease the friction and push the refrigerator over the pencils more easily
Explanation:
Force of friction is a resistance force which acts between two surfaces which are in relative motion. Friction is both boon and bane. Due to friction, we are able to sit, walk etc but also, due to friction there is dissipation of energy. Friction can be reduced by applying lubricants, reducing contact area, reducing the load.
F = μN where N is the normal force which depends on the mass.
Thus, by reducing the load, force of friction can be reduced. Round objects like wheels can also be used. By this the contact area reduces.
Sound is a disturbance that travels through a medium as a
a. longitudinal wave.
b. surface wave.
c. standing wave.
d. transverse wave.
According to Newton's first law of motion, what will an object in motion do when
external force acts
come to a stop
move at the same velocity
speed up
change direction
It could speed up, change direction, come to a complete stop, or slow down without stopping.
The one thing the object could NOT do is keep moving with the same velocity. Its velocity must change.
Answer:
move at the same velocity
Explanation:
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why does a person while firing a bullethold the gun tightly to his shoulders?
Answer:
in order to celebrate the animals victory!
Explanation:
because they have spent a long time in this revolution. they finally won so theyre firing bullets for celebration
Alfred pushes on a heavy box, but cannot move it. The box has a lot of _____. inertia motion friction gravity
Answer:
Inertia
Explanation:
Inertia is best defined as the ability of an object to resist a change in position or movement. That is why when an object has a higher mass, the higher the inertia. Imagine an oncoming truck that is fully loaded versus you. The tendency for the truck to change its movement would be difficult because of its its mass. It has a lot of inertia.
Compare and contrast elements and compounds.
Hello There!
Elements are substances that are only made up of 1 type of atom.
Some examples of elements could be Carbon {C}, Hydrogen {H} and Iron {Fe}.
Compounds on the other hand are made up of two or more atoms. They are chemical substances. An example of a compound could be Water because this is made up of 2 hydrogen atoms and one oxygen atom.
Elements and compounds are both types of substances, but they have some key differences. Elements are pure substances that cannot be broken down into simpler substances by chemical means, while compounds are substances made up of two or more elements that are chemically bonded together.
Explanation:Elements and compounds are both types of substances, but they have some key differences.
Elements are pure substances that cannot be broken down into simpler substances by chemical means. They consist of only one type of atom and are listed on the periodic table. Examples of elements include oxygen, carbon, and gold.
Compounds, on the other hand, are substances made up of two or more elements that are chemically bonded together. They have a fixed composition and can be broken down into their constituent elements through chemical reactions. Examples of compounds include water (H2O) and carbon dioxide (CO2).
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What are close-toed shoes least likely to provide protection against?
hydrogen gas produced during a reaction
spilled water from a hot-water bath
broken glass from a dropped test tube
acid leaking from a cracked beaker
Answer: Hydrogen gas produced during a reaction
Explanation:
A chemical lab is a place where potential hazards oriented to the use of the chemicals can happen. These chemicals can cause injuries to the skin when come in contact directly or indirectly. Therefore, protective safety measures should be taken so as to protect oneself while working in a chemical lab.
Among the options given, hydrogen gas produced during a reaction is the correct option. This is because of the fact that close-toed shoes can provide protection against all types of chemical fluids. But the gases like hydrogen gas are reactive and they are permeable inside the shoe material hence, may cause damage.
Which muscles are voluntary?
a. skeletal and cardiac
b. smooth and cardiac
c. smooth only
d. skeletal only
Answer: skeletal only
Explanation: Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscles, with the other two being skeletal and smooth muscles. It is an involuntary, striated muscle that constitutes the main tissue of the walls of the heart.
Smooth muscle is responsible for muscle tissue in which the contractile fibrils are not highly ordered, occurring in the gut and other internal organs and not under voluntary control.
Hope this helps