Answer:
η₁ = 2.6
Explanation:
Here, we will use snell's law to calculate the refractive of the substance:
[tex]\frac{\eta_2}{\eta_1} = \frac{Sin\theta_1}{Sin\theta_2}[/tex]
where,
η₁ = refractive index of first substance = ?
η₂ = refractive index of second substance = 1.5
θ₁ = angle of incidence = 30°
θ₂ = angle of refraction = 60°
Therefore,
[tex]\frac{1.5}{\eta_1} = \frac{Sin\ 30^0}{Sin\ 60^0}[/tex]
η₁ = 2.6
An object is thrown upward with a speed of 20m/s near the surface of a planet where the gravitational field strength is a constant magnitude of 6N/kg. The vertical position versus time of the object is shown in the graph. Is the object considered to be in free fall?
A. Yes, because the only force exerted on the object is the force due to gravity from the planet.
B. Yes, because any object that falls is considered to be in free fall.
C. No, because the object does not fall with an acceleration of nearly 10m/s2.
D. No, because the object has an acceleration due to gravity that is different from the gravitational field strength of the planet.
A planet's gravity is the only force acting on the object, hence the answer is yes.
How does gravity's field strength become calculated?This is a technique for calculating the gravity. Weight divided by mass equals the gravitational field's strength. On Earth, there is a 10 N/kg gravitational field.
The gravitational field at the satellite's location and the acceleration of the spacecraft are both compared.The speed of gravity at the orbital radius is equal to the speed at which a satellite in a circular orbit moves toward the object it is circling. Objects in orbit are constantly falling, like people in an elevator.
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Which force acts on any object moving through the air
The force of air resistance acts on any object while moving through the air.
We live in a medium where the air is present everywhere. It is not a vacuum where no force will be experienced by us but we live on earth where the air is present everywhere. Whenever we cut through, the air we encounter a force called air resistance.
Air resistance is like friction, it is everywhere. Air resistance always acts opposite to our direction of motion and like friction, it is a necessary evil.
Whenever an object moves through the air, air resistance always acts to oppose its motion.
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A body falls freely from rest on Earth (g= - 10 m/s) 1. The displacement at t = 3 sis -45 m 2. The time for it to reach a speed of 25 m/s is I $ 3. The time to fall 320 m is 8 s. 4. The speed after falling 80 m is m/s. An object is thrown downward with an initial velocity of -20 m/s on Earth 5. The acceleration of the object after 1 s is -10 m m 6. The object's displacement after 4 sis -120 7. The time required to reach a speed of 50 misis -2.5 8. The velocity after falling 105.8 mis mis
1. The displacement of a body falling freely from rest at time t seconds is given by the formula d = -1/2 gt^2 + vt + d0, where g is the acceleration due to gravity (in this case, -10 m/s), v is the initial velocity (in this case, 0 m/s), and d0 is the initial displacement (in this case, 0 m). Plugging in the values, we get d = -1/2 (-10 m/s) (3 s)^2 + 0 m/s (3 s) + 0 m = -45 m.
2. The speed of a body falling freely from rest at time t seconds is given by the formula v = gt + v0, where g is the acceleration due to gravity (in this case, -10 m/s) and v0 is the initial velocity (in this case, 0 m/s). Plugging in the values and setting v = 25 m/s, we get 25 m/s = (-10 m/s)t + 0 m/s. Solving for t, we get t = 2.5 s.
3. The displacement of a body falling freely from rest at time t seconds is given by the formula d = -1/2 gt^2 + vt + d0, where g is the acceleration due to gravity (in this case, -10 m/s), v is the initial velocity (in this case, 0 m/s), and d0 is the initial displacement (in this case, 0 m). Plugging in the values and setting d = -320 m, we get -320 m = -1/2 (-10 m/s) t^2 + 0 m/s t + 0 m. Solving for t, we get t = 8 s.
4. The speed of a body falling freely from rest at time t seconds is given by the formula v = gt + v0, where g is the acceleration due to gravity (in this case, -10 m/s) and v0 is the initial velocity (in this case, 0 m/s). To find the speed after falling 80 m, we need to find the time t that corresponds to this displacement. We can use the formula for displacement to find t: d = -1/2 gt^2 + vt + d0. Plugging in the values and setting d = -80 m, we get -80 m = -1/2 (-10 m/s) t^2 + 0 m/s t + 0 m. Solving for t, we get t = 2 s. Plugging this value of t back into the formula for speed, we get v = (-10 m/s) (2 s) + 0 m/s = -20 m/s.
5. The acceleration of an object is given by the formula a = (vf - vi)/t, where vf is the final velocity, vi is the initial velocity, and t is the time elapsed. In this case, the initial velocity is -20 m/s and the time elapsed is 1 s. The final velocity is not given, so we cannot use this formula to find the acceleration.
6. The displacement of an object with constant acceleration is given by the formula d = 1/2 at^2 + vt + d0, where a is the acceleration, v is the initial velocity, t is the time elapsed, and d0 is the initial displacement. In this case, the acceleration is -10 m/s^2, the initial velocity is -20 m/s, the time elapsed is 4 s.
What is speed?Speed is a measure of how fast an object is moving. It is defined as the distance an object travels per unit of time. In equation form, speed is represented by the letter v and is equal to the distance d traveled divided by the time elapsed t: v = d/t. The unit of speed is typically meters per second (m/s) or kilometers per hour (km/h). For example, if a car travels a distance of 200 meters in 10 seconds, its speed is v = 200 m / 10 s = 20 m/s.
Therefore, the correct answer is as given above
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1. The displacement of a body falling freely from rest at time t seconds is given by the formula d = -1/2 gt^2 + vt + d0, where g is the acceleration due to gravity (in this case, -10 m/s), v is the initial velocity (in this case, 0 m/s), and d0 is the initial displacement (in this case, 0 m). Plugging in the values, we get d = -1/2 (-10 m/s) (3 s)^2 + 0 m/s (3 s) + 0 m = -45 m.
2. The speed of a body falling freely from rest at time t seconds is given by the formula v = gt + v0, where g is the acceleration due to gravity (in this case, -10 m/s) and v0 is the initial velocity (in this case, 0 m/s). Plugging in the values and setting v = 25 m/s, we get 25 m/s = (-10 m/s)t + 0 m/s. Solving for t, we get t = 2.5 s.
3. The displacement of a body falling freely from rest at time t seconds is given by the formula d = -1/2 gt^2 + vt + d0, where g is the acceleration due to gravity (in this case, -10 m/s), v is the initial velocity (in this case, 0 m/s), and d0 is the initial displacement (in this case, 0 m). Plugging in the values and setting d = -320 m, we get -320 m = -1/2 (-10 m/s) t^2 + 0 m/s t + 0 m. Solving for t, we get t = 8 s.
4. The speed of a body falling freely from rest at time t seconds is given by the formula v = gt + v0, where g is the acceleration due to gravity (in this case, -10 m/s) and v0 is the initial velocity (in this case, 0 m/s). To find the speed after falling 80 m, we need to find the time t that corresponds to this displacement. We can use the formula for displacement to find t: d = -1/2 gt^2 + vt + d0. Plugging in the values and setting d = -80 m, we get -80 m = -1/2 (-10 m/s) t^2 + 0 m/s t + 0 m. Solving for t, we get t = 2 s. Plugging this value of t back into the formula for speed, we get v = (-10 m/s) (2 s) + 0 m/s = -20 m/s.
5. The acceleration of an object is given by the formula a = (vf - vi)/t, where vf is the final velocity, vi is the initial velocity, and t is the time elapsed. In this case, the initial velocity is -20 m/s and the time elapsed is 1 s. The final velocity is not given, so we cannot use this formula to find the acceleration.
6. The displacement of an object with constant acceleration is given by the formula d = 1/2 at^2 + vt + d0, where a is the acceleration, v is the initial velocity, t is the time elapsed, and d0 is the initial displacement. In this case, the acceleration is -10 m/s^2, the initial velocity is -20 m/s, the time elapsed is 4 s.
What is speed?
Speed is a measure of how fast an object is moving. It is defined as the distance an object travels per unit of time. In equation form, speed is represented by the letter v and is equal to the distance d traveled divided by the time elapsed t: v = d/t. The unit of speed is typically meters per second (m/s) or kilometers per hour (km/h). For example, if a car travels a distance of 200 meters in 10 seconds, its speed is v = 200 m / 10 s = 20 m/s.
Therefore, the correct answer is as given above
The angular position of a point on the rim of a rotating wheel is given by θ = 4.0t - 3.0t^2 + t^3, where is in radians and t is in seconds. What are the angular velocities at t = 2.0{~s}t=2.0 s.
The angular velocity of the pointed rim of a rotating wheel if, The angular position of a point on the rim of a rotating wheel is given by θ = 4.0 t - 3.0 t² + t³, is 4 rad/ sec.
What is Angular velocity?The rotation rate, which refers to how quickly an item rotates or circles in relation to another point, is measured pictorially by angular velocity. Angular velocity can be defined as the speed at which an item rotates or revolves around an axis.
Given:
θ = 4.0 t - 3.0 t² + t³
Calculate the angular velocity by differentiating the position function as shown below,
dθ / dt = d (4.0 t - 3.0 t² + t³) / dt
V = 4.0 - 6t + 3t² (Change in position is equal to velocity)
Put the value of time, t = 2
V = 4 - 6 × 2 + 3 × 2²
V = 4 - 12 + 3 × 4
V = 4 - 12 + 12
V = 4 rad/sec
Thus, the angular velocity is 4 rad/sec.
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A 0.33-m-long violin string has a mass of 0.89 g. The peg exerts a 45 N force on it. What can you determine about the sound produced by that string?
When utilizing the A4 = 440Hz standard, the tuned strings provide equal temperament frequencies of G3 (196 Hz), D4 (293.7 Hz), A4, and E5 (659.3 Hz).
The strings of the violin are frequently tuned in perfect fifths. G3, D4, A4, and E5, in order of lowest to highest, are the pitches. Alternate tunings are occasionally used, especially in bluegrass and kindred fiddling styles.
The violin is the string instrument with the highest pitch in the current string family. The strings are tuned a fifth apart to provide the equal temperament frequencies G3 (196 Hz), D4 (293.7 Hz), A4, and E5 using the A4 = 440 Hz standard (659.3 Hz).
The violin can play notes with frequencies ranging from 196 Hz for the lowest note, G3, to 2,637 Hz for the highest note, E7. The greatest synthetic harmonic note, D8, is 4,698 Hz while the highest genuine note, A7, is 3,520 Hz
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Why does sonar only work in water?
In comparison to air, sound travels through water far more quickly, allowing you to hear distant sounds almost instantly. Additionally, measuring the doppler effect by sound rather than radio is simpler. In comparison to air, sound travels through water far more quickly, allowing you to hear distant sounds almost instantly
Why is it that sonar performs better in water?Sound waves are used by sonar to "see" in the water.
Additionally, measuring the doppler effect by sound rather than radio is simpler?The ocean may be explored and mapped with the use of sonar, which stands for Sound Navigation and Ranging. This is because sound waves travel further under water than radar and light waves.
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a car moving at a steady 10 m/s on a level highway encounters a depression that has a circular cross-section with a radius of 30 m. the car maintains its speed as it drives through the depression. what is the normal force exerted by the seat of the car on a 60.0-kg passenger when the car is at the bottom of the depression?
The automobile, which weighs 388 newtons, is at the bottom of the depression. At 17.15 m/s, the automobile loses contact with the bumpy road.
The normal force is the force that surfaces use to prevent solid objects from piercing one another. Normal forces include contact forces. Two surfaces that are not in contact cannot be moved by a normal force.
Calculation:r = 30 m
v = 10 m/s
m = 60 kg
(a) Let N be the normal reaction.At the bump
N = mg - mv^2 / r
N = 60 x 9.8 - 60 x 10 x 10 / 30 = 588 - 200 = 388 newton
(b) Then the contact loose, N = 0So, mg = mv^2 / r
v^2 = r x g = 30 x 9.8 = 294
v = 17.15 m/s.
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What is natural and artificial sound?
Answer:
The Natural sounds contained sounds of living objects. The Musical sounds contained notes of different musical instruments, whereas the Artificial sounds were daily object-like sounds.
Explanation:
hope this helps!
The table shows the acceleration due to gravity on four different planets. What planet is a person standing on if the person has a mass of 35. 0 kg and weighs 343 n?.
Planet that the person is standing on is Earth. However, it is also possible that the person is standing on a planet or moon with a similar acceleration due to gravity.
The weight of an object is the force exerted on it by gravity, and it is equal to the mass of the object multiplied by the acceleration due to gravity. The acceleration due to gravity is a measure of the strength of the gravitational field at a particular location, and it is denoted by the symbol g.
The weight of an object can be calculated using the equation:
Weight = Mass * g
In this case, the person has a mass of 35.0 kg and a weight of 343 N. To determine the acceleration due to gravity at the location where the person is standing, we can rearrange the equation above to solve for g:
g = Weight / Mass
Plugging in the values given, we get:
g = 343 N / 35.0 kg
This simplifies to:
g = 9.8 m/s^2
This table shows the acceleration due to gravity on four different planets what planet is a person standing on if the person has a mass of 85.0 kg and weighs 305 N mercury is 3.59 Venus 8.87 Earth 9.81 mars 3.77
A.mercury
B.Venus
C.earth
D. Mars
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What is dramatic irony short answer?
A literary device known as dramatic irony occurs when the audience or the reader has a better understanding of the events or characters in a work than the characters themselves.
What is dramatic irony, and how can you spot it?dramatic irony Add to list Share. Dramatic irony is when a character in a Titanic movie leans on the balcony and exclaims, "It's so beautiful I could just die," immediately before the ship hits the iceberg. Dramatic irony arises when the audience is aware of information that the characters are not.
Why is it dramatic irony?Dramatic irony occurs when the audience is aware of a situation before some of the players are. This knowledge frequently creates a sense of suspense since we know the character(s) will eventually discover the truth.
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Is wind and solar energy sustainable?
Because they have a little negative impact on the environment, are widely available, and are continuously supplied by nature, renewable energy sources like wind, solar, and hydropower are considered sustainable energy sources.
Is solar power a sustainable source of power?Resources that won't damage the environment or the energy needs of future generations are used to produce sustainable energy. The most popular sustainable energy sources, such hydroelectric, solar, and wind, all incorporate renewable energy.
How enduring is wind power?Wind power is the ideal technology for producing energy in a safe and eco-friendly manner because it emits no pollutants, is readily available nearby, is non-renewable, is economical, and creates wealth and jobs.
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the trunk of an elephant is also used for one of these activities which one?
Answer:
b. collecting food
other options are wrong as elephant cant do those things
A force of 200N is exerted on an area of 50m. Calculate the pressure exerted by the force
Answer:
4N/m
Explanation:
pressure = force/area
pressure = 200/50 N/m
= 4N/m
a wave has a period of .096 seconds. what is the frequency
Answer:
T = 10.417
or 10 5/12
Explanation:
T = 1/f
f = 0.096
T = 1/0.096
T= 10.417
Assume the following waves are propagating in air
a) Calculate the wavelength lambda_1 for gamma rays offrequency f_1 = 6.30×1021 Hz.
c) Calculate the wavelength lambda_2 for visible light offrequency f_2 = 5.40×1014 Hz.
A. The wavelength of light in gamma ray is 4.76x10⁻¹³m.
B. The wavelength of light in the visible light range is 5.55x10⁻6m.
The wavelength of the light ray is always given by
Lambda=c/f, where c is the speed of light in vacuum and it's value is c=3x10⁹ m/sec and f is the frequency of the light ray.
a. The frequency of the gamma-ray (f1)=6.3x10²¹ Hertz. Since , lambda =c/f , Lambda 1=c/f1 =(3x10⁹) / (6.3x10²¹) =4.76x10⁻¹³ m.
The normal wavelength of the gamma rays are always below 100 pm or 10⁻¹⁰ m.
b.The frequency of visible light (f2) =5.40x10¹⁴ Hertz. Lambda 2=c/ f2 =(3x10⁹) / (5.40x10¹⁴) =5.55x10⁻⁶ m.The normal range of wavelength of visible light is 400-700 nm.
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A boat on a river heads North East at a speed of 50 m/s at an angle of 35 degrees. What is the velocity's horizontal component?
The horizontal component of the boat's velocity is 40.96 m/s.
What is the horizontal component of the boat's speed?The horizontal component of the boat's velocity is the velocity of the boat along the horizontal direction or x - axis of the boat's motion.
The magnitude of the horizontal component of the boat's velocity is calculated as follows;
Vx = V cos (θ)
where;
V is the speed of the boatθ is the direction of the boat's speedVx = 50 m/s x cos (35)
Vx = 40.96 m/s
Thus, the horizontal component of the boat's velocity is a function of the initial velocity and the direction of the velocity.
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In addition to the anti-VEGF antibody, Marie has decided to also add a VEGFR primary antibody. At which position do you expect the band for VEGFR to appear? Remember that in SDS-PAGE proteins are separated according to their molecular weight. a) VEGFR runs at a lower molecular weight than VEGF b) VEGF and VEGFR run at the same molecular weight c) VEGFR cannot be detected by Western blotting d) VEGFR runs at a higher molecular weight than VEGF
VEGFR runs at a higher molecular weight than VEGF. In the position, VEGFR is expected to appear band. Hence, option (c) is correct.
What is VEGFR?A chemical that binds to vascular endothelial growth factor (VEGF) receptors, which may be present on some cancer cells. This might stop cancers from forming the new blood vessels they require to grow.
Anti-VEGFR monoclonal antibodies of various sorts are being researched for the treatment of cancer. These chemicals fall within the categories of monoclonal antibodies and antiangiogenesis agents.
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Pick the winner! Which do you think will have more momentum and push the other backwards? And WHY? Explain assumptions you make: A big loaded truck driving on the freeway OR a baseball sized meteorite falling down from space
Answer:
I would assume that the big loaded truck driving on the freeway would have more momentum and push the baseball sized meteorite backwards. This is because the truck is much larger and heavier than the meteorite, and it is also moving at a much higher speed. The momentum of an object is directly proportional to its mass and velocity, so the truck would have a much greater momentum than the meteorite. Additionally, the truck is moving on a solid surface (the freeway) while the meteorite is moving through the air, which would also affect its momentum. However, this is just an assumption based on the information given, and the actual outcome would depend on many factors, such as the exact speed and mass of the truck and meteorite, the angle and direction of their motion, and any other forces that may be acting on them.
Explanation:
Answer:
Explanation:
I'm going to guess the big truck.
The truck does have a lot more mass, while the meteorite has a lot more speed.
p = mv
mass of truck = 5,000 kg , mass of meteorite = 1 kg ( it could be a metal)
truck has 5,000 times mass
velocity of meteorite 213,000 km/h ( as it enters atmosphere) , truck 55 km/h
3900 times more velocity
The truck wins.
Also, by the time the meteorite gets to the ground it will have slowed down considerably. Ofc, the truck will be on the ground.
What does a 2 solution mean?
To make a proper 2 perfect solution, a solvent should be added but the general method for making a 2 perfent solution is to have 2 grams of solvent dissolved in 98-100 ml of water.
A solution is a mixture in which small parts are divided into a large part. A solute is a substance that dissolves in a substance. A solute is in a completely liquid or gaseous state where the solute dissolves to form a solution.
Percentage of mass can be calculated by dividing the mass of the component with the total mass of the mixture, multiplied by 100 which is given as follows:
[tex]\frac{2 g}{100 g_{\text {mass of solute }+\text { mass of solvent }}} \times 100[/tex]
A perfect solution is a solution that contains the maximum amount of solute that can be dissolved in the solution. On the other hand, an unsaturated solution is a solution in which the amount of other solutes dissolved in the solute is less than the value of the solubility index.
Like molality, percentage is also a way to describe the solution ratio. The percentage is calculated by dividing the amount of the material with the total amount, and the result is multiplied by 100. Normality is also a way to determine the balance of the solution.
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Correct Question:
How do you make a 2 percent solution?
In order to determine causal effects between variables, researchers must use. a. Correlational designs b. Case studies O c Experimental designs O d. All of the above
Option a; Correlational designs causal effects between variables, researchers must use.
Correlational research's objectives are to identify relationships between variables and to make it possible to predict the future based on the past. It's possible that one of two variables is a cause and the other is an effect if there is a correlation between them. But due to the correlational research methodology, it is impossible to distinguish between the two. To be safe, researchers avoid deriving causal inferences from Correlational designs. Correlational study involves monitoring two variables and looking at how they relate to one another without changing an independent variable. Correlation may not imply causation. An analysis of correlations between two or more variables is a type of research design.
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What is the unit for wavelength λ?
The SI unit of wavelength is meter usually denoted as m. While measuring wavelength the multiples or fractions of a meter is also used.
What is a meter?
The meter was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, making the circumference of the Earth approximately 40,000 km. In 1799, the meter was redefined as a prototype meter (the actual bar used was changed in 1889). In 1960, the power meter was redefined in terms of a certain number of wavelengths of a certain krypton-86 emission line. The current definition was adopted in 1983 and slightly modified in 2002 to make it clear that the meter is a measure of proper length.To know more about meter, click the link given below:
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How population control helps in sustainable development
Increasing population makes it more challenging for limited and lower-middle income nations to finance the growth in public spending on a per capita basis required to eradicate poverty.
Which demographic do you refer to?Any whole group that shares at least one trait is referred to be a population. People do not make up all populations. Populations can include, but not be limited to, individuals, animals, organizations, structures, buildings, cars, farms, items, or occasions.
What are the many forms of population?A population is an identified collection of objects the with purpose of study and data collecting. Examples include humans and animals. It comprises of a related collection of species that live in a certain area and have the ability to interbreed.
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A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose the player runs at speed 5.9 m/s relative to the field while he passes the ball with velocity vector v BP relative to himself. If vector v BP has magnitude 7 m/s, what is the smallest angle it can have for the pass to be legal?1° (relative to +x axis)
If he passes the ball with a velocity vector v BP relative to himself, and v BP has a value of 7 m/s, then the least angle it can have is 32.5 °.
A player runs at a speed relative to field is v1 = 5.9 m/s
A player runs at a speed relative to himself is v2 = 7 m/s
v = v_1 +v_2
= 5.9 m/s + 7.0 m/s
= 12.9 m/s
smallest angle by which the player hits the ball is θ = cos^-1 ( 5.9 / 7.0)
= 32.5 degrees
Velocity is the rate at which an object is changing position when it is observed from a certain point of view and as measured by a particular unit of time. It is defined as the direction at which an object is traveling. Speed is the rate of movement along a path in contrast to velocity, which specifies the direction and speed of an object's motion.
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Describe two vectors a andb such that vector a+ vector b= vector c and a+b=c
(b) vector a + vector b= vector a - vector b
(c) vector a + vector b + vector c and a2 +b2=c2
can you show me how to do this problem and show all work myprofessor didn't go over any of this and i dont have a clue.
Answer:
a + b = c where a and b and c are vector quantities
Since c is the result of adding vector b to vector a (to add two vectors the vectors are connected head to tail)
a^2 + b^2 - 2 ab cos θ = c^2 is an expression of such a relationship
Note that a^2 + b^2 = c^2 if a and b are at right angles to one another
Another way to express this is:
a x + b x = c x where a and b are the x-components of a and b
a y + b y = c y describes the y -components of a and b
The above two equations will provide the x and y components of vector c
Someone please help I’ll be so grateful with one paragraph I don’t know how to begin…..
In this question you will be
assessed on using good English, organising information clearly and using
specialist terms where appropriate.
The table below shows some information about a new planet; Pegasi b, and Earth
Peg. Earth
Distance from the star| 7.7. 150
Time to orbit the sun|. 4. 365
Time to spin once on axis| 4. 1
Tilt of axis|. 79. 23.5
Write a guide to the new planet comparing it to earth and other planets in
the solar system and if it is possible to live there.
Answer:
Explanation:
Welcome to Pagasi b, new recruit. You will enjoy your new, fresh , home planet. Your new home world is more relaxed than earth, days are longer by about quadruple, as are the nights. Also seasons are also about 4 times as long on Pagasi b. one year on Pagasi b is a bit over 4 years on earth. You'll get great harvests and plenty of time to rest up during the mild, yet cool winters. If the equatorial region is too warm for you during summer you can always travel north as the planet is at a 79 degree axis tilt , and will provide much cooler climes as you travel north for summers. Have a great day, day, day, day :P
It takes a 7 n force to cause a 0. 028 kg object to begin moving. What is the acceleration of the object as it begins to move?.
It takes a 7 N force to cause a 0. 028 kg object to begin moving. The acceleration of the object as it begins to move is 250 m/s².
What is acceleration?
Acceleration is defined as the rate of change of velocity with respect to time.
Acceleration is a vector quantity as it has both magnitude and direction. It is also the second derivative of position with respect to time or it is the first derivative of velocity with respect to time.
According to Newton's 2nd law, the force on an object is equal to the mass times acceleration of an object.
F = ma
and, a = F/m
Given, the force acting on an object to move it, F = 7N
The mass of the object, m = 0.028 Kg
The acceleration of the object = 7/0.028 = 250 m/s²
Therefore, the acceleration of the object as it begins to move is 250 m/s²
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What are period 2 elements called?
Period 2 elements are called as Bridge elements.
When we go through the detailed analysis of the periodic table we get that the elements like Li, Be, B, C, N, O, F, and Ne are the elements which are in the second period of the periodic table.
Such elements have similar qualities and can be compared to those from the third period or the usual elements. The elements of period 2 have common traits on the basis of factors like ion polarization and electronegativity with the elements of period 3.
Due to this distinct behaviour, such elements are named "bridge elements"
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A particle moves along the x-axis so that at any time t≥0 its position is given by x(t) = t3 − 3t2 − 9t. For what values of t is the particle at rest?
At [tex]t = 3[/tex], the particle will be at rest for the position along the x- axis which has been given as [tex]v(t) = t^{2} -3t^{2} -9t[/tex].
What do we mean by particle at rest?
You could understand the phrase "A particle at rest tends to stay at rest" to mean that a particle that is not moving relative to some reference objects tends to remain stationary relative to those same things.
The particle is at rest when velocity of the particle is [tex]0[/tex]. From this we know that the velocity is [tex]v(t) = t^{2} -3t^{2} -9t[/tex]
Therefore the velocity is [tex]0[/tex] when [tex]t[/tex] is
[tex]t^{3} -3t^{2} -9t = 0[/tex]
[tex]t( t^{2} -3t -9)[/tex] [tex]= 0[/tex]
[tex]( t^{2} -3t -9) = 0[/tex]
[tex]t^{2} -3t -3t -9 = 0[/tex]
[tex]t(t -3)-3(t -3) = 0[/tex]
[tex]t = 3[/tex]
Hence, At [tex]t = 3[/tex], the particle will be at rest.
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explain how la nina and el nino are similar and different
Answer:
(differences)
1- El Niña typically lasts 9-12 months while La Nina typically lasts 1-3 years even tho both occur every 3 to 5 years
2- El Niño refers to the above-average sea-surface temperatures that periodically develop across the east-central equatorial Pacific.
La Niña refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
3- Although El Niño and La Niña have an influence on global climate trends, they do not affect all regions similarly, nor do their impacts in a particular location. La Niña causes basically the opposite changes in temperature as El Niño in many areas, especially in the tropics.
What is maximum load limit?
Maximum load is the maximum limit that can be carried by a particular vehicle for a safe ride. which is issued by the authority of that particular area.
Staying within the maximum load limit is very necessary as it leads to a safe ride for people as well as for the vehicle.
Maximum load tells us what maximum load or maximum number of people that can be carried by a vehicle. To stay within the maximum limit is strictly mandatory for an area any violation of this rule can lead to some strict punishment.
In the case of boats, the maximum load is measured by the maximum capacity Quizlet.
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