Answer:
a) Regular participation in physical activity reduces the risk of developing various diseases.
Answer:
I think A
Explanation:
I did some research on this today for class, here is what I wrote if you want an understanding why I think A is the answer: Exercise can cause a temporary boost in the production of macrophages, the cells that attack bacteria. During moderate exercise, immune cells circulate through the body more quickly and are better able to kill bacteria, which can help you not get colds and viruses, after a few hours the immune system will return to normal, the more you exercise the longer the effects will last. So the more you exercise the better your immune system will be!
Hope this helps, I attached a pdf of the form and stuff I used earlier if you want some info...
(tell me if it doesnt work)
HELP PLEASE I HAVE NO IDEA OF WHAT TO DO!!!!!
Answer:
6 seconds/ 4 to 5 seconds
Explanation:
Answer:
im prety sure it is b tell me if im wrong
Explanation:
A skater with a mass of 50 kg is moving at a speed of 5 m/s. Away is their kinetic energy?
are the objects described here in static equilibrium, dynamic equilibrium, or not in equilibrium at all?
Static equilibrium: It takes effort for you to lift a 200-pound barbell above your head. Dynamic equilibrium: A crane lifts a girder at a steady speed. A jet plane is flying at cruising altitude.
What conditions must exist for static equilibrium?For an object to remain in static equilibrium, two requirements of equilibrium must be met. The object must be subject to zero net force, to start. The object's net torque must also be zero, which is the second condition.
What brings about static balance?By balancing forces and torques, static equilibrium is produced. Only when the object is subject to zero net forces does it happen. The object should be subject to a clockwise and counterclockwise torque that are both equal in magnitude. Therefore, a static equilibrium object doesn't tilt or rotate; it just stays stable.
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a car can just barely turn a corner on an unbanked road at 39 km/h on a dry sunny day. what is the car's maximum cornering speed on a rainy day when the coefficient of static friction has been reduced by 50%?
car's maximum cornering speed on a rainy day when the coefficient of static friction has been reduced by 50% is 27.58 m/s
Car's maximum speed at dry Sunny day,
Vs = √μrg = 39 m/s
Speed at rainy day, μ becomes 0.5μ
Vr = √(0.5*μ*r*g) =√(0.5) * (39) = 27.57716
Vr = 27.58 m/s
An object experiences static friction when a force is applied to it; as a result, the object resists the applied force and stays at rest until static friction is removed. In kinetic friction, the frictional force opposes an object's motion. An item is kept at rest by the force of static friction. The phrase "static friction" can be defined as "the friction people perceive when they attempt to move a stationary object on a surface, but without actually causing any relative motion in between surface and the body it is on. A force acting in opposition to the direction of a moving body on the surface is felt.
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3. Given a force of 44 N and an acceleration of 4 m/s?, what is the mass?
Answer:
m=F/a
= 44/4
= 11 m
Explanation:
Just use the formula F=ma
which factors cause transitions between the solid and liquid state?
Answer: A solid can be converted to a liquid by heating, a liquid can be converted to a solid by cooling.
A 438kg car is accelerating east at 2.55m/s^2. What is the total force acting east on the car
Answer:
1116.9 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 438 × 2.55
We have the final answer as
1116.9 NHope this helps you
4. Drawing Conclusions Determine whether each
example below is a case of Newton's first law or
Newton's second law.
a. a skydiver accelerating toward the ground
b. a skydiver faling with constant velocity
c. a skydiver on the ground at rest
(a) skydiver accelerating toward the ground: This is an example of Newton's second law
(b) a skydiver falling with constant velocity: This is an example of Newton's first law.
(c) a skydiver on the ground at rest: This is an example of Newton's first law.
Which Newton's law does the example represent?
According to Newton's second law, an object's acceleration is directly proportional to the force applied to it and inversely proportional to its mass. In this case, the force of gravity is acting on the skydiver, causing them to accelerate towards the ground.
According to Newton's first law, an object in motion will remain in motion with constant velocity unless acted upon by an external force. In this case, the skydiver is falling with constant velocity because the force of gravity is balanced by air resistance.
For third case, the skydiver is not moving because no external forces are acting on them to cause motion.
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Question 19 (4 points) A 2-kg ball traveling in the y-direction (North) collides with a 6-kg ball, initially at rest. After the collision, the 6-kg ball is moving at 5 m/s, 53° West of North. The 2-kg ball is moving 37° East of North. 6 kg 530 5 m/s 379 VE 2 kg before 6 kg after 2 kg What was the initial speed of the small ball (before the collision)? 20 m/s 35 m/s 30 m/s 15 m/s 40 m/s 10 m/s 25 m/s
David is a stock clerk in the supermarket. David does only what he is told to do—no more and no less. Does David have a good attitude toward work? EXPLAIN
How many joules per coulomb are given to charges that flow in a 120-volt circuit?
due tmr!! please help
The number of joules per coulomb for 120-volt circuit is 120 joules/C.
What is the number of Joules flowing in the circuit?
The amount of energy transferred to each unit of charge is given by the voltage or potential difference between two points.
The unit of potential difference is the volt, which is equivalent to one joule per coulomb.
So if we have a 120-volt circuit, each coulomb of charge that flows between two points receives 120 joules of energy.
Energy per unit charge = Potential difference
= 120 volts
= 120 joules/coulomb
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Please someone answer this quickly!! I'll give 20 points for it, I just need the answers :)
The potential energy of the person mass 95 Kg sitting on top of a slid 3 m high is 2795.85 J
How do i determine the potential energy of the person?The following data were obtained from the question:
Mass of person (m) = 95 KgHeight of slid (h) = 3 mAcceleration due to gravity (g) = 9.81 m/s² Potential energy of person (PE) = ?The potential energy of the person can be obtained as follow:
PE = mgh
Inputting the given parameters, we have:
= 95 × 9.81 × 3
= 2795.85 J
Thus, the potential energy of the person is 2795.85 J
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How do I substitute and solve?
I see how it is 3.2 divide it by 1000 kg ×9.80, but I get confused with the end product.
My question is
\(2.4n \div (1000 \frac{kg}{m {}^{3} } ) \times (9.80 \frac{m}{s {}^{2} } )\)
N is Newtons
Will give Brainly for correct answer
Nevermind I'm good now!❤
3.2 N = 3.2 kg•m/s²
and
(1000 kg/m³) (9.80 m/s²) = 9800 kg/(m² s²)
Then
(3.2 N) / ((1000 kg/m³) (9.80 m/s²)) = (3.2 kg•m/s²) / (9800 kg/(m² s²))
… = 3.2/9800 m³
… = 0.00032653… m³
and converting to scientific notation gives
… = 3.2653… × 10⁻⁴ m³
To fully describe the photoelectric effect, scientists must consider which of
the following to be quantized?
A. Matter only
B. Neither light nor matter
C. Both light and matter
D. Light only
Answer:
D. Light only
Explanation:
This is because photoelectric effect is a phenomenon in which electrically charged particles are emitted from a material when light is incident on it.
The light generates the energy which causes the material to emit electrons.
These electrons are only emitted at certain values of light energy, this thus shows that the light has to be quantized since electrons are not emitted over a range of values of light energy.
Thus, to fully describe the photoelectric effect, only light needs to be quantized.
Answer:
Light and Matter
Explanation:
I took the quiz.
a 1.6-cmcm-tall object is 13 cmcm in front of a diverging lens that has a -24 cmcm focal length. A.Calculate the image position.
Express your answer to two significant figures and include the appropriate units.
B.Calculate the image height.
Express your answer to two significant figures and include the appropriate units.
The image position and image height for an object placed 13 cm in front of a diverging lens with a focal length of -24 cm can be calculated as follows:
A. The image position is located at -13.0 cm in front of the lens.
B. The image height is -3.7 cm.
A. To calculate the image position, we can use the lens equation:
1/f = 1/d_o + 1/d_i
where f is the focal length, d_o is the object distance, and d_i is the image distance.
Plugging in the given values:
1/(-24 cm) = 1/13 cm + 1/d_i
Solving for d_i gives d_i ≈ -13.0 cm, indicating that the image is formed 13.0 cm in front of the lens.
B. To calculate the image height, we can use the magnification formula:
magnification (m) = -d_i / d_o
Plugging in the values, we have:
m = -(-13.0 cm) / 1.6 cm ≈ -8.1
The negative sign indicates that the image is virtual and upright.
The image height is then given by the magnification multiplied by the object height:
image height = m * object height = -8.1 * 1.6 cm ≈ -3.7 cm.
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Please ASAP!!!! For q7 and q8
Answer:
7.37 degree
8.54
Explanation:
yan po ang sagot sana makatulong
28,800 C of charge flow through a lamp every hour. Calculate the current used by this lamp
This lamp's estimated current consumption is 8 amperes.
What is electric current ?Electric current is the rate of charge (electron) passing in a conductor. The SI unit for electric current is the ampere. As current does not obey vector addition, it is a scalar quantity.
Given information:
amount of charge flowing through the lamp, Q = 28800 C;
The charge flow time was t = 1 hour = 3600 seconds.
Hence, the current passing through the bulb as a result.
I = Q/t
= 28800/3600 ampere,
= 8 ampere
Therefore, this lamp consumes 8 amperes of current.
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The wavelength of UV light absorbed strongly by DNA is 263 nm. What is the energy in Joules of a quantum of this light?
Explanation:
E = hc / wavelength
Given that:
h = 6.626 × 10-34 Js
c = 2.998 x 10^8 m/s
wavelength = 263 x 10^-9 m
A concave mirror of radius of curvature 40 cm is to be used to obtain a real image of an object. The image is to be one- third as large as the object. Where should the object be placed, and where is the image to be found?
Answer:
u = 80 cm and v = 80/3 cm
Explanation:
focal length f = +40/2 = 20 cm.
magnification m = v/u = 1/3, thus v = u/3
using 1/u+1/v=1/f gives 1/u=1/(u/3)=20
So u = 80 cm and v = 80/3 cm
(i) a step-up transformer increases 25 v to 120 v. what is the current in the secondary coil as compared to the primary coil?
When a step-up transformer is used to increase voltage, the current in the secondary coil will be less than the current in the primary coil. This is due to the conservation of energy, which dictates that the power input must equal the power output.
Since power is equal to voltage times current, increasing the voltage will cause a corresponding decrease in the current to maintain a constant power output.
In this specific example, the voltage is increased from 25 V to 120 V. Assuming the transformer is 100% efficient (meaning no energy is lost to heat or other factors), the current in the secondary coil will be 1/5 (or 20%) of the current in the primary coil. This is because the power output must equal the power input, and the power is proportional to the product of voltage and current.
Therefore, if the primary coil has a current of 2 amps, the secondary coil will have a current of 0.4 amps. This is a common tradeoff in electrical systems, as increasing voltage can allow for more efficient transmission of power over long distances, but requires careful consideration of the resulting current and power requirements.
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A 1500 pound car is stopped in traffic on a hill that is at an incline of 10. Determine the force that is required to keep the car from rolling down the hill.
A 1500 pound car is stopped in traffic on a hill that is at an incline of 10. The force that is required to keep the car from rolling down the hill will be 1133.53 N.
When all the forces that act upon an object are balanced, then the object is said to be in equilibrium motion. The forces are considered to be balanced if the rightward forces are balanced by the leftward forces and the upward forces are balanced by the downward forces.
It can be observed from the diagram that in order resist the car to rolling down the hill we need to apply an equal and opposite force against the inclined force( that is mgsin(x)) to form an equilibrium position because rolling is associated with horizontal forces hence we need to apply force against the force which can drive down the car .
mass = 1500 pound = 680.39 kg
sin(10) = 0.17
F (counter force ) = m*g*sin(x)
= 680.39 * 9.8 * 0.17
= 1133.53 N
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What is the main idea of a short history of nearly everything?
"A Short History of Nearly Everything" is a popular science book written by Bill Bryson, which provides an overview of the key events and scientific discoveries that have shaped our understanding of the world. The main idea of the book is to explore the history of science and provide a comprehensive and accessible overview of the most important ideas, theories, and discoveries that have changed our understanding of the universe.
The book covers a wide range of topics, including the history of the Earth and the universe, the evolution of life, the development of human civilization, and the latest discoveries in physics, chemistry, and biology. Bryson's writing style is engaging and humorous, making the material accessible to a broad audience.
One of the key ideas of the book is that scientific knowledge is constantly evolving and that our understanding of the world is always changing as new discoveries are made. Bryson emphasizes the role of individual scientists and their impact on the advancement of knowledge, highlighting the human story behind the scientific breakthroughs that have shaped our world.
In conclusion, the main idea of "A Short History of Nearly Everything" is to provide a comprehensive and accessible overview of the key events and scientific discoveries that have shaped our understanding of the world. The book covers a wide range of topics and explores the history of science, emphasizing the human story behind the scientific breakthroughs that have changed our understanding of the universe.
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It's physical science, but I don't know I should put for it HELP!!!
(A) The relationship between current and voltage when resistance is constant represents by graph 2. Option B is correct.
(B) Relationship between current and voltage is direct. Option B is correct.
What is resistance?Resistance is the electric component that regulates the flow of current through the conductors or circuits.
Here,
From ohm's low, we have
Voltage = Current × resistance
As resistance = constant
Voltage ∝ Current
The above expression implies that Voltage becomes directly proportional to the current. So as current increases voltage also increases simultaneously [Option B is correct]. And graph between current and voltage will be a straight line passing through the origin Option B is correct.
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The voltage or potential difference across an electric circuit is directly proportional to the current flowing through the circuit. Thus, the correct options for 1 and 2 are B and B, respectively.
What is the Ohm's law?Ohm's law is the description of the relationship between two variables which are current, voltage, and a constant called resistance. The amount of steady current which passes through a large number of materials is directly proportional to the potential difference, or the voltage across the materials or electric circuit.
It can be expressed as: V = IR
where, V is the potential difference across the circuit,
I is the electric current,
and R is the resistance
As voltage is directly proportional to the current. If the voltage is increasing, then the current will also increase and if the voltage decreases then the amount of current through the circuit also decreases.
Therefore, the correct options for 1 and 2 are B and B, respectively.
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What is your hypothesis (or hypotheses) for this experiment?
(physically science lab report)
Answer:The hypothesis (or hypotheses) for this experiment would be :
1) Experiment of motion( movement) can be performed in this lab.
2) Experiment of motion( movement) can be performed better in this lab.
3) Only experiments of motion( movement) can be performed in this lab.
4) Experiment of motion( movement) can be performed more accurately in this lab.
5) No experiment of motion( movement) can be performed in this lab.
Explanation:
The hypothesis (or hypotheses) for this experiment would be :
Experiment regarding motion( movement) can be performed in this lab.
And Conclusion would be:
This lab is for motion.
We can only conclude that this lab is for motion when we find out that the motion experiments can be performed better or with higher accuracy or none other experiment can be carried out as easily as the motion experiment.
We only conclude when we test the hypothesis .
The hypothesis can be tested in a number of ways such as showing better results, or showing negative results of the said statement.
So there can be a few hypotheses as follows.
1) Experiment of motion( movement) can be performed in this lab.
2) Experiment of motion( movement) can be performed better in this lab.
3) Only experiments of motion( movement) can be performed in this lab.
4) Experiment of motion( movement) can be performed more accurately in this lab.
5) No experiment of motion( movement) can be performed in this lab.
Explanation:
5. Chad wants to investigate whether adding a solute to water affects its boiling point and freezing point. He set up an experiment and recorded the boiling and freezing point in degrees Celsius (°C), his results are in the data table.
EFFECT OF SOLUTE ON BOILING AND FREEZING POINTS
Test
A.Water
B.Water + 10 grams of salt
C.Water + 20 grams of salt
D.Water +30 grams of salt
E.Water + 40 grams of salt
Boiling Point (°C)
A.100.0
B.100.5
C.101.0
D.101.5
E.102.0
Freezing Point (°C)
A.0
B.-2
C.-4
D.-6
E.-8
Based on the data, which statement would be the best conclusion?
A. Adding salt to water decreases the boiling point.
B. Adding any solute to water increases the boiling point.
C. Adding salt to water increases the boiling point and decreases the freezing point.
D. Adding any solute to water increases the boiling point and decreases the freezing point.
Answer:
Explanation:
C. Adding salt to water increases the boiling point and decreases the freezing point.
The andromeda galaxy, m31, is in many ways similar to our own galaxy but slightly larger. the linear diameter of the andromeda galaxy along its longest axis is 140,000 light-years, but from our perspective, the andromeda galaxy has a maximum angular diameter of 3.18°. how far away is the andromeda galaxy?
The Andromeda Galaxy distance is approximately 2.52 million light-years away from us.
The Andromeda Galaxy (M31) is indeed similar to our own Milky Way galaxy, but slightly larger with a linear diameter of 140,000 light-years along its longest axis. To determine its distance from us, we can use the angular diameter, which is 3.18°.
We can use the small-angle formula to find the distance. This formula relates the angular diameter (in radians), the actual diameter, and the distance between the observer and the object:
angular diameter (radians) ≈ actual diameter / distance
First, we need to convert the angular diameter from degrees to radians:
3.18° * (π radians / 180°) ≈ 0.0555 radians
Now, plug in the values into the small-angle formula:
0.0555 radians ≈ 140,000 light-years / distance
To solve for the distance, divide both sides of the equation by 0.0555 radians:
distance ≈ 140,000 light-years / 0.0555 radians
distance ≈ 2,522,522 light-years
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Which type of forces are subjected in truss?
Tension and compression forces act on diagonal and vertical members respectively in a truss structure.
A truss is a construction that comprises of a progression of interconnected triangles, intended to disperse stacks and give security. The powers that follow up on a bracket can be characterized into two kinds: pressure and pressure powers.
Tension powers are powers that draw on a part, like a rope or link. In a support, strain powers follow up on the corner to corner individuals that structure the triangles. These individuals are under pressure since they are being pulled separated.
Compression forces are forces that push on a part, like a segment or shaft. In a support, pressure powers follow up on the upward individuals that associate the top and base harmonies of the bracket. These individuals are under pressure since they are being crushed together.
Notwithstanding pressure and pressure powers, brackets can likewise be exposed to twisting minutes and shear powers, which are brought about by outer burdens following up on the support.
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7) The radius of Saturn's orbit around the Sun is about 10 times that of Earth. Complete the following statement: The period of Saturn is about
a. 160 yr.
b. 40 yr.
c. 90 yr.
d. 30 yr.
Among the given options, the closest value to 31.62 years is:
d. 30 yr.
So, the correct statement is: The period of Saturn is about 30 yr.
The period of a planet is related to its orbital radius by Kepler's Third Law of Planetary Motion. According to Kepler's Third Law, the square of the period (T) of a planet is proportional to the cube of its orbital radius (r).
Mathematically, T² = k × r³, where k is a constant.
Given that the radius of Saturn's orbit (r) is about 10 times that of Earth's orbit, we can express it as r = 10 × r(Earth).
Substituting this value into the equation, we have (T(Saturn))² = k × (10 × r(Earth))³.
Since we are comparing Saturn's period to Earth's period, we can express Earth's period as T(Earth) = 1 year.
Now, we can determine the ratio of the periods:
(T(Saturn))² / (T(Earth))² = k × (10 × r(Earth))³ / r(Earth)³
(T(Saturn) / T(Earth)) = k × 10³
Taking the square root of both sides, we get:
T(Saturn) / T(Earth) = 10= 31.62
Therefore, the period of Saturn (T(Saturn)) is approximately 31.62 times the period of Earth (T(Earth)).
Since Earth's period is 1 year, the period of Saturn is approximately 31.62 years.
Among the given options, the closest value to 31.62 years is:
d. 30 yr.
So, the correct statement is: The period of Saturn is about 30 yr.
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A motorcycle enters a freeway with a speed of 5.8 m/s and accelerates uniformly for 65 m in 7.2 s.
How fast is the car moving after this time?
The speed of the motorcycle is 9.02777m/s in 7.2 sec.
What is acceleration?The rate at which an object's velocity with respect to time changes is referred to as acceleration in mechanics. They are vector quantities, accelerations. The direction of the net force acting on an object determines the direction of its acceleration.
v(0) = 5.8
s(0)=0
s(7.2) = 65
s(t) =at^2/2 + v(0)t
s(7.2) = a(7.2)^2 + 5.8(7.2) = 65
a = (65-41.76)/51.84
a= 23.24/51.84 = about 0.4483 m/s²
v(t) = s'(t) = at +v(0) = at +5.8
v(7.2) = 0.4483(7.2) + 5.8
= 9.02777
velocity in 7.2 seconds is about 9.03 meters per second
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Can an object have a speed of zero while it has an acceleration that is not
zero?