please help physics statics.. don't understand how to solve

Answer:

V = sqrt(2gh)

V = sqrt(2 * 9.8 * 10)

V = sqrt (196)

V = 14 m/s

Answer:

V = sqrt(2gh)

V= sqrt(29.8 10)

V = sqrt (196)

V=14 m/s

Answer:  D. 37.6 m/s

Explanation: its D

Answer:

Explanation:

The power on the primary side of a transformer is equal to the power on the secondary side, neglecting losses. This is because power is conserved in a transformer.

Therefore, if the power on the primary side is 2 MW, then the power on the secondary side will also be 2 MW.

So, the correct answer is: 2 MW.

Answer:

1.076 m/s

Explanation:

Given a 3.0 kg fish is swimming at 1.5 m/s to the right. it swallows a 0.25 kg fish swimming to the left at 4.0 m/s. what is the speed and direction of the larger fish immediately after lunch?  

Mass of fish m1 = 3 kg

Velocity v1 = 1.5 m/s

Mass of small fish m2 = 0.25 kg

Velocity v2 = - 4 m/s (negative sign since the direction is opposite)

Therefore total mass of fish after swallowing will be M = 3 + 0.25 = 3.25 kg

Let the final velocity of fish be V

Now according to the law of conservation of momentum we have

     So m1v1 + m2v2 = M x V

           3 x 1.5 + 0.25 x – 4 = 3.25 x V

               4.5 – 1 = 3.25 V

                   3.25 V = 3.5

                     Or V = 1.076 m/s

So speed of the fish will be 1.076 m/s

Explanation:

Plastics with a density less than or equal to 1.025 g/mL will float in seawater, while plastics with a density greater than 1.025 g/mL will sink.

Here are some examples of plastic densities:

Polyethylene terephthalate (PET) has a density of approximately 1.38 g/mL, so it will sink in seawater.

Polypropylene (PP) has a density of approximately 0.9 g/mL, so it will float in seawater.

High-density polyethylene (HDPE) has a density of approximately 0.95 g/mL, so it will float in seawater.

Polystyrene (PS) has a density of approximately 1.05 g/mL, so it will sink in seawater.

Based on the above examples, we can see that plastics such as polypropylene and high-density polyethylene will definitely float in seawater, while others such as polyethylene terephthalate and polystyrene will definitely sink. Other types of plastics with densities close to 1.025 g/mL may float or sink depending on their exact density and the conditions of the water, such as temperature and salinity.

Answer:

a) We can use the following formula to calculate the acceleration of the object:

a = (v_f - v_i) / t

where a is the acceleration, v_f is the final velocity, v_i is the initial velocity, and t is the time interval. Substituting the given values, we get:

a = (90 m/s - 40 m/s) / (2 min * 60 s/min) = 0.83 m/s^2

The force applied causing it to speed up can be found using Newton's second law of motion:

F = m * a

where F is the net force, m is the mass of the object, and a is the acceleration. Substituting the given values, we get:

F = 0.05 kg * 0.83 m/s^2 = 0.042 N

Therefore, the force applied causing the object to speed up is 0.042 N.

b) The work done by this force can be calculated using the following formula:

W = F * d

where W is the work done, F is the net force, and d is the displacement of the object. The displacement of the object is given by:

d = 670 m

Substituting the given values, we get:

W = 0.042 N * 670 m = 28.14 J

Therefore, the work done by the force is 28.14 J.

c) The work done by friction can be calculated using the formula:

W_friction = F_friction * d

where W_friction is the work done by friction, F_friction is the force of friction, and d is the displacement of the object. The force of friction can be calculated using:

F_friction = μ * F_norm

where μ is the coefficient of friction and F_norm is the normal force. The normal force is equal to the weight of the object, which is given by:

F_weight = m * g

where m is the mass of the object and g is the acceleration due to gravity. Substituting the given values, we get:

F_weight = 0.05 kg * 9.81 m/s^2 = 0.49 N

The normal force is equal in magnitude to the weight of the object, so we have:

F_norm = F_weight = 0.49 N

Substituting the given coefficient of friction, we get:

F_friction = 0.34 * 0.49 N = 0.17 N

The work done by friction can now be calculated by substituting the values we have found:

W_friction = 0.17 N * 670 m = 113.9 J

Therefore, the work done by friction is 113.9 J.

d) The net work done can be calculated as the sum of the work done by the applied force and the work done by friction:

W_net = W_applied + W_friction

Substituting the values we have found, we get:

W_net = 28.14 J + 113.9 J = 142.0 J

Therefore, the net work done is 142.0 J.

The value of magnetic induction is 0.667 T.

The EMF induced in a conductor traveling through a magnetic field is given by:

EMF = B x L x v

where B is the magnetic induction (measured in Tesla), L is the conductor's length (in meters), and v is its speed (in meters per second)

What we have here is

L = 60 cm = 0.6 m (because the length of the wire is specified in centimeters) (since the length of the wire is given in centimeters)

v = 5 m/s

EMF = 2 V

When these values are inserted into the equation, we obtain the following:

2 V = B x 0.6 m x 5 m/s

Calculating for B, we obtain:

B = 2 V / (0.6 m x 5 m/s) = 0.666... T

Thus, the magnetic induction is 0.667 T, rounded to three significant numbers.

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Ionic compounds can be created when elements from Groups 1 and 17 mix one to one ratio.

To create ionic compounds, group 1 and group 17 elements can combine one to one.

In addition, group 8A (or VIIIA) of the periodic table contains the noble gases or inert gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon. As a result, if any elements from this group are present, they will not bond (Rn).

The name of these elements refers to how little they react with other elements or compounds. An example of bonding is, when carbon and oxygen atoms join in a 1:2 ratio, carbon dioxide is produced; when they combine in a 1:1 ratio, carbon monoxide, or CO, is produced.

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Governments assist in enhancing the infrastructure necessary for companies to flourish and helps business provide the goods and services that people need and want.

What is economics?

Economics is the study of how limited resources are used to create outputs, such as commodities and services, that are then distributed among individuals. Resources serve as the resources for creating outputs. Products and services are created by combining resources. The necessary raw ingredients are provided by land and natural resources. Raw materials are turned into finished products and services by labor.

Businesses perform better when they can effectively transport raw materials to factories and deliver finished goods to plants and markets. Governments assist in enhancing the infrastructure necessary for companies to flourish. Roads, bridges, rail lines, airports, seaports, energy transmission lines, and telecommunications networks are all included in this.

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Answer:

satellites dont fall from the sky

Explanation:

Satellites don’t fall from the sky because they are orbiting Earth. Even when satellites are thousands of miles away, Earth’s gravity still tugs on them. Gravity—combined with the satellite’s momentum from its launch into space—cause the satellite to go into orbit above Earth, instead of falling back down to the ground

The 2.4 m/s² acceleration would be produced by the same force applied to a 13.4 kg mass.

What is acceleration ?

The pace at which speed changes is known as acceleration. Acceleration typically, but not always, indicates a change in speed. Because the direction of an object's velocity is shifting even while it follows a circular course, it continues to accelerate.

What is force?

A body can change its state of rest or motion when an external force acts on it. It is directed and has a magnitude.

As we know that force= mass × acceleration

So F₁=m₁×4

F₂=m₂×6

now for combined system total acceleration will be "a"= F/ m₁+m₂

m₁= F/4

m₂= F/6

so put the value of m₁ and m₂

​Therefore, 2.4 m/s² acceleration would be produced by the same force applied to a 13.4 kg mass.

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The kind of food that she may have to consume is garlic bread.

Garlic bread is a type of bread that is usually made with bread, butter, and garlic.

Garlic bread is generally high in calories, fat, and sodium, and it may also contain added sugars or artificial flavors. Additionally, the type of bread used to make garlic bread is usually white bread, which is refined and low in fiber.

It can help you to have a whole lot of carbohydrates.

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Explanation:

The angle of the plane is directly correlated to the shape of the elliptical shape cut out. When the plane is at a low angle, the resulting elliptical shape cut out is also much shorter in length. Conversely, when the plane is at a steep angle, the resulting elliptical shape cut out is much longer in length.

This is because the angle of the plane determines the amount of material that will be removed when the plane is used to cut the elliptical shape. When the plane is at a low angle, less material is removed, thus producing a shorter elliptical shape. When the plane is at a steep angle, more material is removed, thus producing a longer elliptical shape.

In addition, the angle of the plane also affects the depth of the elliptical shape cut out. When the plane is at a low angle, the resulting elliptical shape is shallow. Conversely, when the plane is at a steep angle, the resulting elliptical shape is deep.

Buoyancy is the upward force wielded on an object that's wholly or incompletely immersed in a liquid. Also, the buoyancy forces of the two balloons don't have to be the same

Buoyancy doesn't depend on the substance present in the body. thus, both balloons will witness the same lift forces.

balloons float because the air pushes them. But the air does not know what is in the ball.

presses on everything unevenly, so the buoyant force is the same for all balloons of the same size. where ρ is the thickness of the air, g is the acceleration due to graveness, and V is the volume of the balloon.

Buoyancy or buoyancy is the upward force wielded by a liquid opposing the weight of a incompletely or completely submerged object. In a column of liquid, the pressure increases with depth due to the weight of the liquid over.

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The engine is providing a forward force of 259,800 N to keep the train moving at a constant velocity.

What is forward force?

Forward force is the force applied in the direction of motion, which causes an object to move or maintain a constant velocity.

Constant velocity refers to the motion of an object moving in a straight line at a steady speed, without changing its direction. The velocity of the object is constant when its speed and direction remain unchanged over time, regardless of whether the object is moving or stationary.

Since the train is moving at a constant velocity, the net force acting on the train is zero. Therefore, the forward force provided by the engine must be equal in magnitude and opposite in direction to the force of air resistance and surface friction.

So, the magnitude of the forward force provided by the engine is:

Magnitude of forward force = Magnitude of force of air resistance and surface friction

Magnitude of forward force = 259,800 N

Therefore, the engine is providing a forward force of 259,800 N to keep the train moving at a constant velocity.

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Answer:

KE = 110000 J

KE = 0.11 MJ

KE = 104.1794917935 [tex]BTU_{mean}[/tex]

KE = 26252.857981585 [tex]cal_{mean}[/tex]

The kinetic energy of a moving body can be calculated using its mass and velocity. The kinetic energy of the horse of 550 kg travelling at 20 m/s is 11000 J.

Kinetic energy of an object is generated by virtue of its motion. When the object starts moving its potential energy starts to convert into kinetic energy.

The kinetic energy of an object is related to its mass and velocity as follows:

Ke = 1/2 mv²

Hence, kinetic energy is directly proportional to the mass and velocity.

Given mass of the horse m = 550 kg

velocity = 20 m/s

then, Ke = 1/2 550 kg × (20 m/s)²

Ke = 11000 J.

Therefore, the kinetic energy of the horse is 11000 J.

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Answer: D

Explanation:

Answer:

The difference in airspeed over the top and bottom of an airplane wing results in a difference in air pressure, which generates lift. The Bernoulli's equation relates the pressure of a fluid (including air) to its velocity and the height of the fluid:

P + 1/2 * rho * v^2 + rho * g * h = constant

where P is the pressure of the fluid, rho is the density of the fluid, v is the velocity of the fluid, g is the acceleration due to gravity, and h is the height of the fluid.

Assuming that the density of air is constant and the height of the wing is negligible compared to the other terms in the equation, we can simplify the equation to:

P + 1/2 * rho * v^2 = constant

The constant in the equation is the same at all points along the wing, since the air is a continuous fluid.

The pressure difference between the top and bottom of the wing can be found by calculating the pressure at the top and bottom of the wing using the simplified Bernoulli's equation, and then taking the difference between the two pressures.

Let P1 be the pressure at the bottom of the wing, where the airspeed is 130 m/s, and P2 be the pressure at the top of the wing, where the airspeed is 170 m/s. Then we have:

P1 + 1/2 * rho * (130 m/s)^2 = P2 + 1/2 * rho * (170 m/s)^2

Simplifying and rearranging, we get:

P1 - P2 = 1/2 * rho * (170 m/s)^2 - 1/2 * rho * (130 m/s)^2

Plugging in the density of air (rho = 1.225 kg/m^3), we get:

P1 - P2 = 1/2 * 1.225 kg/m^3 * (170 m/s)^2 - 1/2 * 1.225 kg/m^3 * (130 m/s)^2

Simplifying and calculating, we get:

P1 - P2 = 377.72 Pa

Therefore, the difference in pressure between the top and bottom of the wing is approximately 377.72 Pa.

The current flowing through the battery is 46.67 A.

The first step is to calculate the equivalent resistance of the circuit, which includes the resistance of the loop and the internal resistance of the battery. Since the points P and Q are connected to the battery, they are effectively in parallel, so the equivalent resistance is,

1/R = 1/40 Ω + 1/0.5 Ω = 0.025 Ω

R = 40 Ω || 0.5 Ω = 0.024 Ω

The total current flowing through the circuit is given by Ohm's law, I = V / (R + r), where V is the voltage of the battery, r is its internal resistance, and R is the resistance of the loop.

Substituting the given values,

I = 24 V / (0.024 Ω + 0.5 Ω) = 46.67 A

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--The complete question is, A circular loop has a resistance of 40Ω. Two points P and Q of the loop, which are one quarter of the circumference apart are connected to a 24V battery, having an internal resistance of 0.5Ω. What is the current flowing through the battery.--

 Adding an additional lamp to a series circuit will increase the brightness of all the lamps in the circuit, and increase the current as well.

A series circuit comprises a path along which the whole current flows through each component. A parallel circuit comprises branches so that the current divides and only part of it flows through any branch.A circuit is said to be connected in series when the same current flows through all the components in the circuit. In such circuits, the current has only one path. Let us consider the household decorative string lights as an example of a series circuit.So, series circuits are also called Voltage dividers. For parallel circuits, it's the opposite, as voltage will flow the same in each path, the current get's dropped/separated for each path. For that very behaviour, these circuits are also called as Current dividers.

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The approximate TOD of the victim is Maybe around 4:30 pm.

The liver temperature can provide a more accurate representation of the genuine core body temperature, hence it is ideal to take the temperature either rectally or by monitoring the liver temperature.To do this, a tiny incision must be made in the right upper belly, and the thermometer must be inserted into the liver tissue.

This stiffening process, known as rigor mortis, occurs at a fairly known time, making it possible to predict when someone will pass away.In overall: If the body is warm and there is no rigidity, the time of death was less than three hours ago.If the body is stiff and warm, death happened 3 to 8 hours earlier.

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The equations of motion are:

[tex]v=u+at\\v^2=u^2+2as\\s=ut+\frac{1}{2}at^2[/tex]

Hence, the formula for distance (or displacement (s) ), time (t), and acceleration (a) to get to speed (u), is:

[tex]s = ut+\frac{1}{2} at^2[/tex]

Answer: Binary fission

Explanation: Bacteria cells split into two using binary fission.

An objects potential energy is due to its state of rest.

Define potential energy

Potential energy is a form of accumulated energy that is dependent on the relationship between different system components. When a spring is compressed or expanded, its potential energy increases. The potential energy of a steel ball is greater when it is raised above the earth than when it is brought to Earth.

Energy that is conserved or kept in a substance or object is known as potential energy. The position, arrangement, or condition of the item or substance determines the amount of stored energy. It can be pictured as energy with the "potential" to perform labor. Mechanical energy, electrical energy, chemical energy, radiant energy, nuclear energy, and heat energy are the six categories of potential energy.

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The magnitude of the bicycle's centripetal acceleration can be calculated using the formula:

a = v^2 / r

where v is the tangential speed and r is the radius of the circular path. Plugging in the given values, we get:

a = (2.7 m/s)^2 / 3.2 m

a = 2.27 m/s^2

The magnitude of the centripetal force on the bicycle can be calculated using the formula:

F = m * a

where m is the combined mass of the bicycle and the child. Plugging in the given values, we get:

F = 54 kg * 2.27 m/s^2

F = 122.58 N

Therefore, the magnitude of the bicycle's centripetal acceleration is 2.27 m/s^2, and the magnitude of the centripetal force on the bicycle is 122.58 N.

Answer:

[tex]\huge\boxed{\sf F_c=123.02 \ N}[/tex]

[tex]\huge\boxed{\sf a_c=2.28 \ m/s^2}[/tex]

Explanation:

Mass = m = 54 kg

Tangential speed = v = 2.7 m/s

Radius = r = 3.2 m

Centripetal force = [tex]F_c[/tex] = ?

Centripetal acceleration = [tex]a_c[/tex] = ?

[tex]\displaystyle F_c=\frac{mv^2}{r}[/tex]

[tex]\displaystyle a_c=\frac{v^2}{r}[/tex]

Put the given data in the above formula.

[tex]\displaystyle a_c=\frac{(2.7)^2}{3.2} \\\\a_c=\frac{7.29}{3.2} \\\\a_c=2.28 \ m/s^2\\\\[/tex]

Put the given data in the above formula.

[tex]\displaystyle F_c=\frac{(54)(2.7)^2}{3.2} \\\\F_c=\frac{(54)(7.29)}{3.2} \\\\F_c=\frac{393.66}{3.2} \\\\F_c=123.02 \ N\\\\\rule[225]{225}{2}[/tex]

Answer: I think the answer is symbiotic tell me if I am right

Explanation:

Answer:

Symbiotic

Explanation:

Pathogenic relationships refer to things like microbes or viruses, think along the lines of how diseases spread throughout the body. One party is benefitted but the other is not.

'Microorganism' and 'macroorganism' refer to types of organisms rather than types of relationships.

A given substance's index of refraction will be ni 1.27 if its critical angle is 52.0. The critical angle refers to the point of contact that determines that the refraction angle is 90 degrees in optics.

Refractive index is characterized by the variance between the speed of a light beam in atmosphere and the provided medium. As a result, it is possible to determine how the angle of inclination and index of refraction are related because they are inversely proportional.

Angle of Criticality and Refractive Index

Mathematics may be used to express the following relationship among critical angle & refractive indices:

[tex]sin C =[/tex] μ [tex]\frac{1}{ \\\frac{a}{b} }[/tex]

Where,

The crucial angle is called C.

The medium's refractive index is represented by μ .

Two media for light waves are represented by letters a and b.

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The length and orientation of the road in a frame of reference that is moving with the given velocity  in a direction making an angle of 30 degrees with the road is calculated to be 2.641 meters and  16.83 degrees respectively.

Let's first calculate the velocity of the road in the frame of reference that is moving with a velocity of 0.6c. We can use the velocity addition formula to calculate this:

v' = (v - u) / (1 - uv/c²)

where

v = velocity of the road

u = velocity of the frame of reference = 0.6c

c = speed of light

Since the road is at rest in its own frame of reference, v = 0. Substituting the values, we get:

v' = (-0.6c) / (1 - 0.6c × 0 / c²)

v' = -0.8824c

The negative sign indicates that the road appears to be moving in the opposite direction in the moving frame of reference.

Now, let's calculate the length of the road in the moving frame of reference. We can use the length contraction formula to calculate this:

L' = L × √(1 - v'²/c²)

where

L = length of the road

v' = velocity of the road in the moving frame of reference

Substituting the values, we get:

L' = 5 × √(1 - (-0.8824c)²/c²)

L' = 2.641 meters

Therefore, the length of the road in the moving frame of reference is 2.641 meters.

Finally, let's calculate the orientation of the road in the moving frame of reference. We are given that the direction of the velocity of the frame of reference makes an angle of 30 degrees with the road. We can use the following formula to calculate the angle between the road and the velocity of the frame of reference in the moving frame of reference:

tan(e') = (tan(e) - u/c) / (1 - u×tan(e)/c)

where

e = angle between the road and the velocity of the frame of reference

u = velocity of the frame of reference = 0.6c

e' = angle between the road and the velocity of the frame of reference in the moving frame of reference

Substituting the values, we get:

tan(e') = (tan(30) - 0.6c/c) / (1 - 0.6c×tan(30)/c)

tan(e') = 0.294

Taking the inverse tangent, we get:

e' = 16.83 degrees

Therefore, the orientation of the road in the moving frame of reference is 16.83 degrees and the length of the road in the moving frame of reference is 2.641 meters.

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The complete question is :

Given a road of length 5 meters, calculate the length and orientation of the road in a frame of reference that is moving with a velocity of 0.6c in a direction making an angle of 30 degrees with the road.

Answer:

The work done by Isaac can be calculated using the formula:

work = force x distance

where force is the amount of force applied and distance is the distance over which the force is applied. In this case, the force applied by Isaac is 42 Newtons and the distance over which the force is applied is 6 meters. However, we need to calculate the actual distance moved by the box, which is different from the distance over which the force is applied.

To calculate the distance moved by the box, we can use the formula for the mechanical advantage of a lever:

mechanical advantage = distance moved by effort / distance moved by load

In this case, the effort is the force applied by Isaac, the load is the weight of the box (15 kg), and the mechanical advantage is the ratio of the distances moved. We can rearrange this formula to solve for the distance moved by the load:

distance moved by load = distance moved by effort / mechanical advantage

In this case, the distance moved by effort is 2 meters (the height the box is lifted), and the mechanical advantage can be calculated using the ratio of the lengths of the lever arms (assuming the lever is a simple machine). Let's say the lever has two arms, one on each side of the pivot point, with lengths of L1 and L2. The mechanical advantage of the lever is:

mechanical advantage = L2 / L1

Assuming Isaac applied the force at the end of one arm, and lifted the load at the end of the other arm, we can say that the ratio of the lengths of the arms is:

L2 / L1 = 2 / 6

Simplifying, we get:

L2 = L1 / 3

This means that the load is lifted a distance of 2/3 meters (or 0.67 meters), which is the distance moved by the load. Now we can calculate the work done by Isaac:

work = force x distance

= 42 N x 6 m

= 252 J

Therefore, the amount of work done by Isaac to lift the 15-kilogram box is 252 Joules. The correct answer is (B) 252 Joules.

The voltage across each resistors connected in parallel circuit is the same. Hence, according to Ohm's law, the current through the resistor of 5 ohms is 1.5 A.

Ohm's law states that, the voltage across a circuit is the product of the resistance through and current flowing through the circuit.

V = I R.

The voltage over resistors connected in series circuit will be different whereas , that for a parallel circuit, voltage is constant.

Given v = 12 V

then, the current through the series circuit is the same for all the components in the circuit.

hence, the total resistance in the branch with 3 ohm and 5 ohms is:

R = R1 + R2  = 5. + 3 = 8 Ω

Now, the current passing through the branch will be 12 V/ 8 Ω  = 1.5 A.

Therefore, the current passing through the 5 ohm resistor is 1.5 A.

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