which country is undertaking a massive dam-building program to expand its hydroelectric output?

Of the statements given about the image formed by a single converging lens, only D is true.

The image formed by a converging lens is always inverted, meaning that if the object being viewed is right-side up, the image will be upside down.

This is a result of the way light rays are refracted as they pass through the lens.

Statements A, B, and C are all false. The orientation of the image depends on the location of the object relative to the lens, and whether the image is real or virtual depends on the location of the lens and the object.

Real images are formed when light rays actually converge at a point, while virtual images are formed when light rays appear to converge at a point.

The properties of the image formed by a converging lens can be determined using the thin lens equation and the magnification equation.

To know more about converging refer here

brainly.com/question/16401483#

#SPJ11

Answer:

There are 3 forces exerted on Block B.

Normal force from the floor. This force is perpendicular to the surface of the floor.

Force of friction from the floor. This force opposes the motion of the block.

Force exerted by Block A. This force is exerted by Block A on Block B.

The magnitude of the normal force is equal to the weight of the block, which is 30 N. The magnitude of the force of friction is equal to the coefficient of friction between the block and the floor multiplied by the normal force. The coefficient of friction is typically between 0 and 1, so the magnitude of the force of friction is less than or equal to 30 N. The magnitude of the force exerted by Block A is equal to the magnitude of the force applied to Block A, which is 18 N.

Therefore, there are 3 forces exerted on Block B: the normal force, the force of friction, and the force exerted by Block A.

Explanation:

Answer:

[tex]\vec v_{0_{b}}=324 \ m/s[/tex]

Conceptual:

Using the idea of momentum conservation to answer this question.

Momentum is a quantity an object has as it is in motion and is the product of that objects mass and velocity. Momentum is a conservable quantity as long as there are no external forces acting on the system. Momentum is measured in (kg·m²)/s and it is a vector quantity. We can calculate momentum using the following formula.

[tex]\boxed{\left\begin{array}{ccc}\text{\underline{Formula for Momentum:}}\\\\ \vec P=m \vec v\end{array}\right}[/tex]

Step-by-step:

Given:

[tex]m_b=25 \ g \rightarrow 0.025 \ kg\\m_w= 2.0\ kg\\\vec v_{f_{bw}}=4.0 \ m/s[/tex]

Find:

[tex]\vec v_{o_{b}}= \ ?? \ m/s[/tex]

In order to tackle this problem we need to analyze the objects before the collision and after the collision.

The initial momentum of the system:

[tex]\underline{ \vec P_0}\\\\\vec P_{0_{b}}=m_b \vec v_{0_{b}} \rightarrow (0.025)\vec v_{0_{b}}\\\\\vec P_{0_{w}}=m_w \vec v_{0_{w}} \rightarrow (2)(0)\\+ \rule{100}{0.5pt}\\\boxed{\vec P_0= (0.025)\vec v_{0_{b}}}[/tex]

The final momentum of the system:

At this point the bullet is embedded in the wood so we can treat them as one object.

[tex]\underline{\vec P_f}\\\\\vec P_{f_{bw}}=(m_b+m_w) \vec v_{f_{bw}} \rightarrow (.025+2)(4) =8.1\\\\\therefore\boxed{\vec P_{f}=8.1}[/tex]

Momentum is conserved. Thus, the initial momentum of the system must equal the final momentum of the system.

[tex]\vec P_{0}=\vec P_{f}\\\\\Longrightarrow 0.025 \vec v_{0_{b}}=8.1\\\\\Longrightarrow \vec v_{0_{b}}=\frac{8.1}{.025}\\ \\\therefore \boxed{\boxed{\vec v_{0_{b}}=324 \ m/s}}[/tex]

Thus, the bullet's initial velocity was found.

The final charge on sphere 1 is still 9.00 nC, and the final charge on sphere 2 is 36.0 nC.

Since the spheres are connected with a wire, they will have the same electric potential. This means that the charges on both spheres will be redistributed until they are equal.

First, we need to find the final potential of both spheres, which is the same:

V = kq1/r1 = kq2/r2

where k is the Coulomb constant (9x10^9 Nm^2/C^2), q1 is the charge on sphere 1 (9.00 nC), r1 is the radius of sphere 1 (since the diameter is not given, we assume it to be 1), q2 is the charge on sphere 2, and r2 is the radius of sphere 2 (which is twice the radius of sphere 1).

Simplifying the equation, we get:

q2 = (r2/r1)q1 = 4q1

Thus, the final charge on sphere 1 is still 9.00 nC, and the sphere charge on sphere 2 is 36.0 nC.

Learn more about sphere here:

https://brainly.com/question/15044609

#SPJ11

Answer:

(i) filtration (ii) sand (iii) filter paper

Explanation:

The salt has dissolved in the water and the salt solution passes through the filter paper leaving behind the sane which does not dissolve in the water.

The greenhouse effect is a natural process that occurs on Earth where certain gases in the atmosphere trap heat and keep the planet's surface warm enough to support life.

These gases, such as carbon dioxide and water vapor, act like a blanket around the Earth, preventing the heat from escaping into space. This is like a one-way valve because it allows the sun's energy to come into the Earth's atmosphere, but it doesn't allow all of it to leave.
To answer the second part of your question, it's important to note that the greenhouse effect is more pronounced for Earth's surfaces than for florists' greenhouses. While both situations involve a similar concept of trapping heat, florists' greenhouses are usually designed to regulate the temperature and humidity inside the structure. This means that there is more control over the amount of heat that is retained, whereas on Earth, the greenhouse effect is constantly at work and its effects are much more widespread. Additionally, the Earth's greenhouse effect is influenced by a variety of factors, including human activities such as the burning of fossil fuels and deforestation, which have intensified the effect and contributed to global warming.

To know more about greenhouse effect visit:
https://brainly.com/question/31595505
#SPJ11

Therefore, the power dissipated by the R2 resistor in the circuit is 18W.

To determine the power dissipated by the R2 resistor in the circuit, we need to use the formula P = V^2/R, where P is power, V is voltage, and R is resistance. We know that R1 is 5.0Ω, but we need to find the voltage across R2. To do this, we can use Ohm's Law, which states that V = IR, where I is current.
In this circuit, the current is the same throughout, so we can use the total current, which is given by I = V/R1. Therefore, V = IR1 = I x 5.0Ω.
Now we can calculate the power dissipated by R2: P = V^2/R2 = (I x 5.0Ω)^2/2.5Ω.
Substituting the value of I from above, we get P = (V/R1 x 5.0Ω)^2/2.5Ω.
Simplifying this expression, we get P = (V^2 x 5.0Ω)/12.5Ω.
To find the value of V, we can use Kirchhoff's voltage law, which states that the sum of voltages in a closed loop is zero. Applying this to the circuit, we get V - IR1 - IR2 = 0.
Substituting the value of I from above and rearranging, we get V = I(R1 + R2) = (V/R1 x 5.0Ω)(5.0Ω + 2.5Ω).
Solving for V, we get V = 7.5V.
Substituting this into the expression for power, we get P = (7.5V^2 x 5.0Ω)/12.5Ω = 18W.
To know more about resistor visit:

https://brainly.com/question/30672175

#SPJ11

c. You should start by figuring out which information is relevant to the problem.

It is important to first understand the problem and identify the relevant information before attempting to solve it. Some information provided in a problem may not be necessary for finding the solution, and including it may actually make the problem more complicated. By identifying the key pieces of information needed to solve the problem, one can focus their efforts and avoid unnecessary calculations or steps.

To know more about information click this link -

brainly.com/question/30350623

#SPJ11

If you lose your grip on a rapidly spinning merry-go-round and fall off, you will fly off in a tangent direction to the circular path you were following before falling off.

This is due to the conservation of angular momentum. As you were spinning with the merry-go-round, you had an angular momentum that was directed along the axis of rotation of the merry-go-round. When you fell off, you lost contact with the merry-go-round, which means that you also lost its angular momentum. However, angular momentum must be conserved, so your body will continue to move with the same magnitude of angular momentum in the absence of external forces.'

Since there is no force to change your direction, your angular momentum vector will remain in the same direction, and your body will move in a straight line tangent to the circular path you were following before falling off.

Learn more about spinning here:

https://brainly.com/question/3203455

#SPJ11

The question is about a block of mass m sliding down an inclined plane and its kinetic energy at the bottom. The correct answer is (C) mgh−Fs.

The following forces are at work on the block as it descends the slope:

1. The gravitational force (mg), which exerts downward pressure vertically.

2. Force that acts perpendicular to the inclination is called the normal force (N).

3. the resistance to the block's motion is caused by the force of kinetic friction (F), which acts perpendicular to the inclination.

As the block slides down the inclined plane, it gains kinetic energy due to the conversion of gravitational potential energy (mgh) into kinetic energy. However, the force of kinetic friction (F) opposes the motion, and therefore, some of the potential energy is lost as work is done against the friction force over the length s of the incline (Fs). So, the net kinetic energy of the block at the bottom of the incline is the initial potential energy minus the energy lost to friction: mgh−Fs.

To know more about the gravitational force, click here;

https://brainly.com/question/29190673

#SPJ11

The gravitational force does not have a direct effect on horizontal wind motions.

The pressure gradient force, frictional force, and Coriolis force are the three primary forces that influence horizontal wind motions.

The pressure gradient force arises due to differences in air pressure between two locations. It causes air to move from areas of higher pressure to areas of lower pressure, resulting in the development of wind.

The frictional force is exerted by the Earth's surface and acts to slow down the wind near the surface. It influences the wind speed and direction close to the ground.

The Coriolis force, on the other hand, is a result of the Earth's rotation and the tendency of objects to move in curved paths in a rotating reference frame. It acts perpendicular to the wind direction and influences the wind's path, causing deflection to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.

While gravity plays a crucial role in maintaining the Earth's atmosphere and other vertical processes, it does not directly impact horizontal wind motions.

Know more about horizontal wind here https://brainly.com/question/31414922#

#SPJ11

The time required to detect four dips in the sun's brightness caused by Earth passing in front of it would depend on several factors, such as the distance between our solar system and the observer, the sensitivity of the observer's instruments, and the timing of the observations.  

The further away the observer is, the longer it would take for them to observe the Earth passing in front of the sun. For instance, if the observer were located in the nearest star system to ours, Proxima Centauri, which is approximately 4.2 light-years away, it would take about 8.4 years for the observer to detect four dips in brightness caused by Earth passing in front of the sun. This is because it would take that long for the light emitted by the sun to reach Proxima Centauri, making it possible for the observer to detect the changes in brightness caused by the Earth's transit.

Additionally, the sensitivity of the observer's instruments would also impact the time required to detect these dips in brightness. The more sensitive the instruments, the easier it would be to detect small changes in the sun's brightness caused by the Earth's transit. However, if the instruments are not sensitive enough, it could take longer to detect the dips in brightness, even if the observer is relatively close to our solar system.


To know more about solar visit :-

https://brainly.com/question/28681519

#SPJ11

Answer:

The correct answer is B.

The basketball player runs a distance of 10.5 meters to reach a speed of 7.44 m/s in 2.82 seconds.

To determine the distance the basketball player runs, we can use the formula for uniformly accelerated motion: distance = (initial velocity × time) + (0.5 × acceleration × time^2). Given that the player starts from rest (initial velocity = 0 m/s), accelerates uniformly, and reaches a speed of 7.44 m/s in 2.82 seconds, we need to find the acceleration.

Rearranging the formula, we get acceleration = (final velocity - initial velocity) / time. Substituting the given values, we find the acceleration to be approximately 2.64 m/s^2. Plugging this value along with the given time into the distance formula, we find that the player runs a distance of approximately 10.5 meters.

To learn more about speed.

Click here:brainly.com/question/17661499?

#SPJ11

The wavelength of the wave is 300,000,000 meters.

The wavelength of a wave can be calculated using the formula:

wavelength = speed / frequency

In this case, the frequency is given as 1 Hz, and the speed is given as 300,000 km/s.

Converting the speed to meters per second (m/s) by multiplying it by 1000, we get 300,000,000 m/s.

Now we can substitute these values into the formula:

wavelength = 300,000,000 m/s / 1 Hz

Simplifying, we find:

wavelength = 300,000,000 m

Therefore, the wavelength of the wave is 300,000,000 meters.

To know more about wavelength , refer here :

https://brainly.com/question/31143857#

#SPJ11

When two bodies of different masses collide, the impulses they exert on each other are determined by the force of the collision and the time it takes for the collision to occur. Impulse is a measure of the change in momentum of an object and is equal to the force multiplied by the time of the collision.

In a collision between two bodies of different masses, the impulse experienced by each body is equal in magnitude but opposite in direction. This means that the force experienced by the lighter body will be greater than the force experienced by the heavier body due to its smaller mass.

The duration of the collision also plays a role in determining the impulse. A longer collision time means a smaller force and a shorter collision time means a larger force. The impulses experienced by both bodies will cause them to move in opposite directions with velocities determined by their masses and the forces exerted on them during the collision.

to know more about collision. click  this link

brainly.com/question/13138178?

#SPJ11

The magnitude of the current flowing through the wire is approximately 16 A. Thus, the correct answer is B) 16 A.

To find the magnitude of the current flowing through the wire, we can use Ampere's Law. Ampere's Law states that the magnetic field at the center of a circular loop is given by the formula:

B = (μ0 × I) / (2 × r)

Where B is the magnetic field, μ0 is the permeability of free space (4Ï€ × 10-7 T · m/A), I is the current, and r is the radius of the loop.

Rearranging the formula, we can solve for the current I:

I = (2 × B × r) / μ0

Plugging in the values given: B = 1.1 mT = 1.1 × 10^-3 T and r = 3.0 mm = 3.0 × 10^-3 m, and μ0 = 4Ï€ × 10^-7 T · m/A, we can calculate the current:

I = (2 × 1.1 × 10^-3 T × 3.0 × 10^-3 m) / (4Ï€ × 10^-7 T · m/A)

 = (6.6 × 10^-6) / (4Ï€ × 10^-7)

 = 16.6 A

To know more about magnitude please visit:

https://brainly.com/question/13949939

#SPJ11

False. A hybrid hard drive typically contains a combination of a traditional magnetic hard disk drive and a solid-state drive (SSD), which uses flash memory to store data.

A hybrid hard drive typically contains a combination of a traditional magnetic hard disk drive and a solid-state drive (SSD), which uses flash memory to store data. Optical discs, on the other hand, are a type of storage media that use lasers to read and write data on a disc surface. While hybrid hard drives may include other technologies such as NAND flash memory, they do not typically incorporate optical discs. Optical discs have largely been replaced by flash memory and cloud-based storage solutions due to their limited capacity and slower read and write speeds.

To know more about magnetic visit :

https://brainly.com/question/30563158

#SPJ11

a) The expression for moment of inertia of the pendulum =T = 2π√(I/mg),

b) The pendulum for small oscillations T = 3.9 s and the value of g = 9.8 m/s²2.

c) The length will be L = √((60gT²2)/(7(4π)²2)).

A. The moment of inertia of the pendulum:

The moment of inertia, denoted by I, of the pendulum about its pivot point can be calculated by considering the individual contributions from the rod and the sphere.

B.expression for the period of the pendulum for small oscillations:

The moment of inertia of a solid sphere about an axis passing through its centre and perpendicular to its surface is given by (2/5)MR²2, where M is the mass of the sphere and R is its radius. In this case, the sphere is attached to the end of the rod, so its moment of inertia needs to be translated to the pivot point. We can use the parallel axis theorem, which states that the moment of inertia about an axis parallel to and a distance d away from an axis through the center of mass is given by I = I_cm + Md²2, where I_cm is the moment of inertia about the center of mass. In this case, the distance d is L/2, and the moment of inertia about the pivot point becomes (2/5)MR²2 + M(L/2)²2.

Therefore, the total moment of inertia of the pendulum about its pivot point is the sum of the contributions from the rod and the sphere:

I = (1/3)ML²2 + (2/5)MR²2 + M(L/2)²2.

Substituting R = L/2, we have:

I = (1/3)ML²2 + (2/5)M(L/2)²2 + M(L/2)²2.

Simplifying further:

I = (1/3)ML²2 + (1/5)ML²2 + (1/4)ML²2.

Combining the terms:

I = (7/60)ML²2.

Therefore, the moment of inertia of the pendulum about its pivot point is (7/60)ML²2.

The period of the pendulum for small oscillations can be determined using the formula:

T = 2π√(I/mg),

C. The length L that gives a period:

where T is the period, I is the moment of inertia about the pivot point, m is the mass of the pendulum (which is M in this case), and g is the acceleration due to gravity.

Substituting the expression for I obtained in

T = 2π√(((7/60)ML²2)/Mg).

Simplifying further:

T = 2π√((7L²2)/(60g)).

Therefore, the period of the pendulum for small oscillations is given by T = 2π√((7L²2)/(60g)).

To determine the length L that gives a period of T = 3.9 s, we can rearrange the formula obtained in part (b):

T = 2π√((7L²2)/(60g)).

Squaring both sides and isolating L:

(T/2π)²2 = (7L²2)/(60g).

Simplifying further:

L²2 = (60gT²2)/(7(4π)²2).

Taking the square root of both sides:

L = √((60gT²2)/(7(4π)²2)).

Substituting T = 3.9 s and the value of g, which is approximately 9.8 m/s²2 , the length L.

3.The moment of inertia of a uniform thin rod about its pivot point can be expressed as (1/3)ML²2, where M is the mass of the rod and L is its length.

To know more about oscillations here

https://brainly.com/question/15780863

#SPJ4

According to data from the Bureau of Labor Statistics, in 2010 about 66 percent of wives with children between ages 6 and 17 earned wages. This indicates a significant increase from previous decades where the number was much lower.

One reason for this increase is the changing attitudes towards gender roles and the increasing importance of women in the workforce. Women have made significant strides in terms of education and career opportunities, and this has resulted in an increase in the number of working mothers. Many women choose to continue working after having children in order to maintain financial stability and career growth. Additionally, the cost of living has increased, and many families require dual incomes to make ends meet.

To know more about Bureau of Labor click this link -

brainly.com/question/30404640

#SPJ11

If the plane is frictionless, the sphere will continue to roll down the incline without any resistance. This means that the force of gravity acting on the sphere will be the only force causing it to move.

The speed of the center of mass (vcm) of the sphere at the bottom of the incline can be calculated using the conservation of energy principle. At the top of the incline, the sphere has potential energy which is converted to kinetic energy as it rolls down.

Assuming that the incline is at an angle theta and the height of the incline is h, the potential energy of the sphere at the top is mgh (where m is the mass of the sphere and g is the acceleration due to gravity). The kinetic energy of the sphere at the bottom of the incline is (1/2)mvcm^2 (where vcm is the speed of the center of mass).

Using the conservation of energy principle, we can equate these two energies:

mgh = (1/2)mvcm^2

Solving for vcm, we get:

vcm = sqrt(2gh)

Therefore, the speed of the center of mass of the sphere at the bottom of the incline is proportional to the square root of the height of the incline and is independent of the mass of the sphere.

To Learn more about frictionless Click this!

brainly.com/question/31248649

#SPJ11

The speed vₓₘ (a) of the center of mass of the sphere at the bottom of the incline, assuming a frictionless plane, is given by vₓₘ (a) = √(2gh), where g is the acceleration due to gravity and h is the height of the incline.

When a sphere rolls without slipping down an incline, its center of mass follows a trajectory determined by the height of the incline. In this scenario, since the plane is frictionless, there is no force opposing the motion of the sphere. Therefore, the sphere's potential energy is converted entirely into kinetic energy.

The potential energy gained by the sphere when it rolls down the incline is given by mgh, where m is the mass of the sphere, g is the acceleration due to gravity, and h is the height of the incline. The kinetic energy gained by the sphere is equal to the potential energy lost, so we have ½mvₓₘ² = mgh.

Simplifying the equation, we find vₓₘ (a) = √(2gh), which represents the speed of the center of mass of the sphere at the bottom of the incline.

Therefore, The velocity vₓₘ (a) of the center of mass of the sphere at the bottom of the incline, in the absence of friction, can be calculated using the formula vₓₘ (a) = √(2gh), where g represents gravity's acceleration and h is the incline's height.

To know more about gravity, refer here:

https://brainly.com/question/31321801#

#SPJ4

Answer:

Sure, here are two advantages of writing large and small numbers in scientific notation:

Scientific notation makes it easier to compare numbers. For example, it is much easier to compare the size of the Earth to the size of the Sun in scientific notation than it is to write out the numbers in standard form.

Scientific notation makes it easier to perform calculations with large and small numbers. For example, it is much easier to add or subtract two numbers in scientific notation than it is to do so in standard form.

Here are some examples of how scientific notation is used in everyday life:

Scientists use scientific notation to write down the sizes of very small things, like atoms and molecules.

Astronomers use scientific notation to write down the distances between stars and galaxies.

Engineers use scientific notation to design and build large structures, like bridges and skyscrapers.

Economists use scientific notation to track the value of currencies and the size of economies.

Scientific notation is a powerful tool that can be used in many different fields. It is a convenient way to write down large and small numbers, and it makes it easier to compare and calculate with them.

Explanation:

The fraction of extrasolar planets that could in principle be detected by the transit method is A) less than about 1%. This is because the transit method requires the planet's orbit to be perfectly aligned with our line of sight, and this only happens for a small fraction of planets. Additionally, other factors such as the planet's size and distance from its star also affect the likelihood of detection using the transit method.

The transit method is more likely to detect planets with larger sizes and those that are closer to their host stars, as they cause a more significant drop in the star's brightness during transit. However, not all planets align in such a way that they transit their star from our viewpoint. Due to this geometric constraint, only a small fraction of extrasolar planets can be detected using the transit method.

To know more about transit method Visit:

https://brainly.com/question/30638028

#SPJ11

Einstein and others assumed that the universe had no beginning because they believed that the laws of physics were eternal and unchanging. They believed that the universe was a static and unchanging place, and that it had always existed and would always exist.

However, in the 1920s, Edwin Hubble discovered that the universe was expanding. This discovery led to the development of the Big Bang theory, which states that the universe began with a very hot, dense state and has been expanding and cooling ever since.

The Big Bang theory is now widely accepted by scientists, and it has been supported by a number of observations, including the cosmic microwave background radiation and the abundance of light elements in the universe.

However, there are still some unanswered questions about the Big Bang, such as what caused the initial expansion. Some scientists believe that the universe may have had a beginning after all, while others believe that it is eternal and unchanging.

The debate over the beginning of the universe is likely to continue for many years to come.

To know more about beginning of universe, refer here:

https://brainly.com/question/28825363#

#SPJ11

Not necessarily. The temperature of a substance is a measure of the average kinetic energy of its molecules. When energy is transferred to a substance as heat, the kinetic energy of the molecules increases, which can cause the temperature of the substance to increase.

However, there are some cases where the temperature of a substance may not increase even if energy is transferred to it as heat.

One example is when a substance undergoes a phase change, such as melting or boiling. During a phase change, the energy transferred as heat is used to break the intermolecular forces holding the substance together, rather than increasing the kinetic energy of the molecules.

As a result, the temperature of the substance remains constant during the phase change until it is complete. For example, when ice is heated at its melting point, the temperature remains constant at 0°C until all the ice has melted. Similarly, when water is heated at its boiling point, the temperature remains constant at 100°C until all the water has boiled off.

Another example is when a substance undergoes a chemical reaction. In some cases, the energy transferred as heat can be used to drive an endothermic chemical reaction, which absorbs heat energy from its surroundings. In this case, the temperature of the substance may not increase even though energy is being transferred to it as heat.

Therefore, while heat transfer can cause an increase in temperature of a substance, it is not always the case and depends on the specific circumstances.

Learn more about substance here:

https://brainly.com/question/13320535

#SPJ11

The time it takes for a capacitor to lose half its charge after the switch is reopened depends on the capacitance and resistance of the circuit. This is described by the time constant of the circuit, which is the product of the capacitance and resistance.

The formula for the time constant is T = RC, where R is the resistance of the circuit and C is the capacitance. The time constant represents the time it takes for the capacitor to charge to 63.2% of its maximum charge or discharge to 36.8% of its initial charge.

To find the time it takes for the capacitor to lose half its charge, we can use the formula T(1/2) = 0.69 x RC. This formula is derived from the fact that it takes approximately 0.69 x T time units for the charge to decrease by a factor of 2.

Therefore, the time it takes for the capacitor to lose half its charge after the switch is reopened is 0.69 times the product of the resistance and capacitance of the circuit. This time constant is an important factor to consider in electronic circuit design, as it determines the speed of charging and discharging in the circuit.

To know more about  resistance.  click this link-

brainly.com/question/30669051

#SPJ11

Animals use upthrust or buoyancy in a variety of ways in their daily lives. Upthrust is the force that is exerted in a fluid such as water or air when a body is inmmersed in it.

Animals use upthrust or buoyancy in a variety of ways in their daily lives. Upthrust is the force that is exerted in a fluid such as water or air when a body is inmmersed in it.

Some animals such as fish use upthrust to move and maintain their position in water. Fish have swim bladder which help them to maintain buoyancy.

Some birds such as pelicans use upthrust to dive and swim in water. They have air sacs filled with air which help to reduce buoyancy and also help their buoyancy.

Insects use upthrust to move in the air.

Overall, animals use upthrust to move and maintain their position.

Learn more about upthrust below.

https://brainly.com/question/23931817

#SPJ1

False, infrared astronomy is best done with space-based telescopes due to the absorption and scattering of infrared radiation in Earth's atmosphere.

Infrared radiation is absorbed and scattered by Earth's atmosphere, which makes it difficult to detect and study from ground-based telescopes. Therefore, infrared astronomy is best done with space-based telescopes that can orbit above the atmosphere and detect infrared radiation without interference.

Additionally, space-based telescopes can provide a clearer and more comprehensive view of the infrared universe due to their ability to detect fainter sources and avoid the interference of Earthly light pollution. However, ground-based telescopes can still contribute to infrared astronomy by studying brighter infrared sources and complementing the observations made by space-based telescopes.

Learn more about radiation here:

https://brainly.com/question/20779091

#SPJ11

According to the theory of solar system formation, the sun's slow rotation today can be explained by the conservation of angular momentum during the process of stellar formation.

The solar system is believed to have formed from a rotating cloud of gas and dust known as the solar nebula.

As the cloud collapsed under its own gravity, it began to spin faster due to the conservation of angular momentum.

As the cloud collapsed further, the majority of the mass was drawn towards the center, eventually forming the sun.

During the collapse, the solar nebula experienced a process known as "angular momentum conservation."

This means that as the cloud's radius decreased, its rotational speed increased in order to conserve the total angular momentum. As a result, the early sun had a much faster rotation rate than it does today.

Over time, as the sun evolved and contracted, its rotation rate gradually slowed down.

This is due to the transfer of angular momentum from the sun's outer layers to its interior through various processes, including magnetic fields and convective motions.

These processes act to decrease the rotational speed of the sun. As a result, the sun rotates slowly today compared to its initial formation.

To know more about solar system refer here

brainly.com/question/1828057#

#SPJ11

The power of the pump is 122,625 watts or 122.625 kilowatts.

A pump is a device used to move fluids (liquids or gases) from one place to another. It works by applying mechanical or other types of energy to the fluid to increase its pressure and flow rate.

We can use the formula for power, which is P = Fv, where F is the force applied, and v is the velocity of the water. In this case, we can calculate the force as the weight of the water lifted by the pump:

F = m g

F = ρ V g

F = ρ A h g

where ρ is the density of water, V is the volume of water lifted, A is the cross-sectional area of the hosepipe, h is the vertical distance that the water is lifted, and g is the acceleration due to gravity.

Substituting the given values, we get:

F = (1000 kg/m³) x (1.0 x 10³ m²) x (2.5 m) x (9.81 m/s²)

F = 24,525 N

Next, we can calculate the power of the pump:

P = Fv

P = (24,525 N) x (5 m/s)

P = 122,625 W

Therefore, the power of the pump is 122,625 watts or 122.625 kilowatts.

To learn more about horsepower click:

brainly.com/question/13259300

#SPJ1