Which parts differentiate ray diagrams of reflected and refracted light?.

a) 67.96 J  work is done by the Sammy against the current.

b) 3.46 m  is the gain in PE by Sammy.

c) 85.06 J is the total work that must be done by Sammy.

d) If Sammy takes 40 S to swim the distance, 85 power does sammy have to exert to do so.

a) The work done by Sammy against the current is given by the formula:

Work = force × distance × cos(theta)

where force is the net force acting on the salmon, distance is the distance travelled by the salmon, theta is the angle between the force and the direction of motion.

Here, the net force acting on Sammy is:

force = 5.00 N - 1.50 N = 3.50 N

The distance travelled by Sammy is 20 m. The angle between the force and the direction of motion is 10 degrees.

Therefore, the work done by Sammy against the current is:

Work = (3.50 N) × (20 m) × cos(10 degrees)

= 67.96 J (Joules)

b) The gain in potential energy by Sammy is given by the formula:

PE = mgh

where m is the mass of the salmon, g is the acceleration due to gravity, and h is the height gained by Sammy.

Here, the height gained by Sammy is the vertical distance travelled while swimming upstream against the current. This distance is given by:

h = distance × sin(theta)

= 20 m × sin(10 degrees)

= 3.46 m

Therefore, the gain in potential energy by Sammy is:

PE = (5.00 N ÷ 9.81 m/s^2) × (3.46 m) × 9.81 m/s^2

= 17.10 J (Joules)

c) The total work that must be done by Sammy is the sum of the work done against the current and the gain in potential energy:

Total work = Work against current + PE gain

= 67.96 J + 17.10 J

= 85.06 J (Joules)

d) The power that Sammy must exert to swim upstream against the current is given by the formula:

Power = work ÷ time

where work is the total work done by Sammy, and time is the time taken to swim the distance.

Here, the total work done by Sammy is 85.

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Answer:

The sound waves from a radio speakers

Explanation:

Answer: it is called a open circuit

Explanation:

Answer:

we are going to focus on just a few. • Heat energy ( Thermal). • Mechanical energy. • Light (Radiant) energy. • Electrical energy. • Sound energy. • Chemical energy

The machine's efficiency is 81.61%, indicating that it converts 81.61% of the input energy into useful output energy, while the remaining percentage is lost as waste or dissipated in the process.

To calculate the efficiency, we can use the formula:

Efficiency = (Actual Output / Design Capacity) × 100

Given:

Actual Output = 7,407

Design Capacity = 9,050

Substituting the values into the formula:

Efficiency = (7,407 / 9,050) × 100

          = 0.817 × 100

          = 81.61%

Therefore, the efficiency of the machine is 81.61%.

Efficiency is a measure of how effectively a machine or system is utilizing its available capacity. In this case, the machine has a design capacity of 9,050 units, but it only produced an actual output of 7,407 units.

By dividing the actual output by the design capacity and multiplying by 100, we find that the machine's efficiency is 81.61%. This indicates that the machine is operating at approximately 81.61% of its full capacity.

A higher efficiency percentage would indicate a more optimal utilization of the machine's capacity, while a lower percentage suggests room for improvement in maximizing output.

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The type of arthrokinematic motion characterized by rotation of one surface on a fixed adjacent surface is called spin.

In addition to composite particles (hadrons) and atomic nuclei, elementary particles also carry the conserved quantity known as spin. In quantum physics, there are two different types of angular momentum: orbital angular momentum and spin angular momentum. The orbital angular momentum operator, which occurs when the wavefunction of an orbit has periodic structure as the angle changes, is the quantum-mechanical equivalent of the classical angular momentum of an orbital revolution.

While the polarisation of light has a classical counterpart in photons, the quantum-mechanical equivalent is spin for electrons. Experiments like the Stern-Gerlach experiment, in which silver atoms were found to have two potential discrete angular momenta while having no orbital angular momentum, are used to infer the presence of electron spin angular momentum.

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Answer:

a.42.5 km/h or .71 km/m

b. 66.7 km/h or 1.1repeating km/m

c.41.5 km/h or .69 km/m

Explanation:

These are all average speed problems, meaning you divide the distance traveled by the time \(s=\frac{d}{t}\)

A. 170km/4hrs or 170km/240 mins

B. 100km/1.5hrs or 100km/90mins

C. The only tricky thing here is the question seems like it wants the speed for all of the information given, so you do include the one hour that he stops

270km/6.5 hrs or 270km/390 mins

The time on the surface of an object would run most slowly on an object with the same mass as the Sun but twice as large in radius.

What is mass?

Mass is a measure of the amount of matter in an object and is typically expressed in kilograms (kg). It is an intrinsic property of matter and is different from weight, which is a measure of the force of gravity acting on an object. Mass is an important factor in determining the physical properties of an object, such as density, momentum, and inertia. Mass is also used to calculate the gravitational force between two objects, as well as the energy required to move it.

This is because the surface gravity of an object is inversely proportional to the square of its radius. Therefore, the object with the same mass as the Sun but twice as large in radius would have a much lower surface gravity, and time would run more slowly on its surface.

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Answer:

mass equals 375 kg

Explanation:

f=ma

f=7500

a=20

m=f/a

m=7500/20

m=375

1500 kg  is the mass of the car​.

Newton's second law of motion describes the relationship between an object's mass and the amount of force needed to accelerate it.

Newton's second law is often stated as,

F=ma, which means the force (F) acting on an object is equal to the mass (m) of an object times its acceleration (a).

According to the question,

Mass = 20m/s , Time = 4s , Force = 7500 N

a = Δv/Δt

a = 20m/s / 4s

a = 5 m/s²

If F = ma then,

7500 N =  m x 5 m/s²

m = \(\frac{7500 N }{ 5m/s^{2} }\)

m = 1500 kg

Therefore,

1500 kg  is the mass of the car​.

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Answer:

I'm not going to give you the direct answer because you shouldn't cheat but I will give a hint

Explanation:

Physics, chemistry, astronomy, geology and other disciplines concerned with the study of non-living things are examples of physical science.

Approximately, 37,481.5 Newtons of force was applied to the truck.

A force is a push or pull on an object with mass causes it to change its velocity. Force is an external agent capable of changing a body's state of rest or motion. It has a magnitude and a direction, so it is a vector quantity.

Mathematically, Force = mass x acceleration

but \(a=\frac{v-u}{t}\)

so, \(F = m\frac{v-u}{t}\)

\(F = 6900\frac{47-3}{8.1}\)

F = 6900(5.4)

F = 37,481.5N

In conclusion, the force applied to the freight truck was 37,481.5N.

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If the elk and deer populations in Yellowstone National Park decline, the producer population will increase because there will be no consumers to eat the plants and shrubs. As a result, the area will have more producers in this case.

In every ecosystem, there are producers such as plants, grass, phytoplankton, etc., and consumers feed on them, so both producers and consumers are in a relationship. If the number of consumers increases, there is a greater demand for food producers, and as a result, the number of producers decreases, whereas a decrease in consumer numbers, such as elk and deer, increases the number of producers.

Hence, declines in the elk and deer populations increase the producer population.

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Answer:

The answer is C.

Explanation:

The angle necessary to keep a 10 kg box motionless, given a coefficient of static friction of 0.55 between the box and the ramp, is 33.4°, which corresponds to Option A.

To determine the angle, we can use the relationship between the coefficient of static friction, the angle of the incline, and the gravitational force acting on the box. The maximum static friction force can be calculated using the formula:

Friction force = coefficient of static friction * Normal force

The Normal force can be found by decomposing the gravitational force acting on the box into components parallel and perpendicular to the incline. The perpendicular component (Normal force) is equal to the weight of the box (mass * gravitational acceleration).

Since the box is motionless, the friction force must be equal to the component of the gravitational force acting parallel to the incline:

Friction force = Component of weight parallel to incline

By substituting the given values and solving for the angle, we find:

coefficient of static friction = tan(angle)

angle = arctan(coefficient of static friction)

angle = arctan(0.55) ≈ 33.4°

Therefore, the correct answer is Option A, 33.4°.

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Answer:

A  The total amount of matter cannot be created

or destroyed.

Explanation:The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.

Answer:

A. The total amount of matter cannot be created or destroyed.

Matter can be transformed but never created or destroyed.

Answer:

4 km/hr

Explanation:

The computation of the actual velocity is shown below:

Because the path of its paddles is opposed to the current direction, the real velocity can be determined by deducting the current velocity to its velocity while paddling

So, the actual velocity is

= Upstream - downstream

= 19 km/hr - 15 km/hr

= 4 km/hr

As we can see it is in positive, so it is an upstream direction  

Answer:

since the direction of his paddles is opposite of the the direction of the current, so the actual velocity can be calculated by subtracting the velocity of current to to his velocity when paddling

v = 19 - 15

v = 4 since the answer is positive, then the direction is upstream

Explanation:

Answer:

In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time. ... One can also speak of motion of images, shapes, and boundaries.

Explanation:

Answer:

it decrease by 9 times

Explanation:

If the separation distance between any two objects is tripled (increased by a factor of 3), then the force of gravitational attraction is decreased by a factor of 9 (3 raised to the second power).

the light ray will be refracted towards the normal.

The spring will be the longest when T = 0.045 seconds has passed, and the shortest when T = 0.135 seconds has passed. For a spring hung vertically with a spring stiffness constant of 290 N/m.

The main purpose of a mechanical spring, an elastic component, is to deflect under load. As the load is relieved, returning to its original shape and location. An elastic machine component that can flex when a load is applied is the stiffness constant. It returns to its previous place after the burdens are taken away. In order to restore elasticity, a spring is a mechanical device built of a material with a very high yield strength.

Amplitude, A = 0.25m

stiffness constant = 290N/M

mass, m = 0.24kg,

angular velocity = w =(k/m)^1/2= (290/0.240)^1/2

W = 34.7 Rad/sec

For a spring at maximum stretch = 34.7t = sin^-1(1)

34.7T = 3.14

T = 3.14/2*34.2

T = 0.045sec

For a spring at minimum stretch = sin(34.7t) = -1

34.7t = sin^-1(-1) = (3*90)/2

t =3 *pi/2*34.7 = 0.135 sec

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Answer:

D

Explanation:

Components that make up our asteroid belt between mars and jupiter

Displacement = Final position – initial position = 50-2=48m

Distance = speed × time= 50m.

Time  =2.3 multiply the time value by 60 we get 138 s.

Velocity =  distance /time =50 m/ 138 s=0.36 m/s

Displacement is defined as a change in an object's location. It is a vector quantity with a magnitude and a direction. It is depicted as an arrow pointing from the starting point to the ending point. For instance, if an object travels from A to B, the object's location changes.

Distance is a numerical measurement of the distance between two objects or places. Distance can refer to a physical length or an estimate based on other factors in physics or common use. The distance between two points A and B is commonly expressed as |AB|.

The primary indication of an object's position and speed is its velocity. It is defined as the distance travelled by an item in one unit of time. The displacement of an item in unit time is defined as velocity.

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Answer:

The plane goes for 600 km per hour.

The trip from a city to another is 2.5 hours

Basically, all you have to do is multiply 600 by 2.5.

That’s 1,500 kilometres.

Explanation:

A plane's average speed between two cities is 750 km/hr and if the trip takes 2.5 hours then the total distance covered by the plane would be 1875 kilometers.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem, a plane's average speed between two cities is 750 km/hr and if the trip takes 2.5 hours then we have to find out  the total distance covered by the plane,

The plane's average speed between two cities is 750 kilometers/hour,

time is taken in the whole trip = 2.5 hours

The distance covered by the plane =  750 kilometers/hour×2.5 hours

                                                          = 1875 kilometers

Thus, the total distance covered by the plane would be 1875 kilometers.

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Answer:

The final velocity of the vehicle is 10.39 m/s.

Explanation:

Given;

acceleration of the vehicle, a = 2.7 m/s²

distance moved by the vehicle, d = 20 m

The final velocity of the vehicle is calculated using the following kinematic equation;

v² = u² + 2ah

v² = 0 + 2 x 2.7 x 20

v² = 108

v = √108

v = 10.39 m/s

Therefore, the final velocity of the vehicle is 10.39 m/s.

Answer:

One explanation may be that as a group, teenagers react more impulsively to threatening situations than do children or adults, likely because their brains have to work harder to rein in their behavior, a research team reported here yesterday at the Society for Neuroscience meeting

The type of pure substances that can create elaborate structures is :

( D ) Atoms that are not attracted to each other because they will stay still and end up laying on top of each other.

An elaborate structure is a complex structure formed by the combination of different unrelated parts. Atoms that are un attracted to each other are made of different parts therefore when they come together they will lay on each other, forming an elaborate structure which is complex in nature.

Hence we can conclude that the type of pure substance that can create elaborate structures is Atoms that are not attracted to each other because they will stay still and end up laying on top of each other.

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The momentum of the small rock at distance 2 is 1.08e+17 kg · m/s, in the -y direction.

What is momentum?

To solve this problem, we need to use the conservation of momentum. Since there are no other massive objects nearby, the total momentum of the system (rock + star) must be conserved.

At the first distance d1, the momentum of the rock can be split into two components: one in the x direction and one in the y direction. Using the angle α = 122 degrees, we can calculate the x and y components of the momentum:

p1x = p1 * cos(α) = 1.15e+17 kg · m/s * cos(122°) = -3.97e+16 kg · m/s

p1y = p1 * sin(α) = 1.15e+17 kg · m/s * sin(122°) = 1.08e+17 kg · m/s

Since there are no external forces acting on the system, the momentum in the x direction and the momentum in the y direction must be conserved separately. However, since the path of the rock is not given, we cannot assume that the momentum in the x direction is conserved. Therefore, we need to calculate the new momentum of the rock in the y direction at distance d2.

To do this, we can use the conservation of momentum in the y direction:

p1y = p2y

where p2y is the momentum of the rock in the y direction at distance d2.

We can rearrange this equation to solve for p2y:

p2y = p1y = 1.08e+17 kg · m/s

Therefore, the momentum of the small rock at distance 2 is 1.08e+17 kg · m/s, in the -y direction.

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Answer:

Heat

Explanation:

Because chemical energy is stored, it is a form of potential energy. When a chemical reaction takes place, the stored chemical energy is released. Heat is often produced as a by-product of a chemical reaction – this is called an exothermic reaction.

Hope this helped.

Explanation:

Answer Should be B.

Its in Form of Heat.