Explanation

If a line intersects two coplanar lines, then the two internal angles on the coplanar lines are called corresponding angles.

Explanation

To find the price of coffee per kilogram, we need to calculate the weighted average of the prices of components A and B based on their ratio.

1. Calculate the total price of the components:

- Let the weight of component A be 2 units and the weight of component B be 3 units.

- The total price of component A is 2 units * $300/kg = $600.

- The total price of component B is 3 units * $500/kg = $1500.

2. Calculate the total weight of the components:

- The total weight is 2 units + 3 units = 5 units.

3. Calculate the price of coffee per kilogram:

- Divide the total price of the components by the total weight:

- $600 + $1500 = $2100.

- $2100 / 5 units = $420 per kilogram.

Therefore, the price of coffee per kilogram is $420.

Explanation

The summer solstice in the Southern Hemisphere occurs during (December 21 or 22)

Dec 22 marks the longest day in the South Hemisphere

Additional Information:

The summer solstice in the Northern Hemisphere, occurs during June (20 or 21 June)

Explanation

A photon is massless, has no electric charge, and is a stable particle. 

Symbol γ

A photon is an elementary particle that is a quantum of the electromagnetic field

The photon belongs to the class of boson particles.

Explanation

Frequency and period are the inverse of each other

frequency is defined as one cycle per second

Hertz is a unit of frequency 

Explanation

If the equation I = R × P is given, where all three variables (I, R, and P) are vectors with arrows over them,

and "R" represents the linear velocity 

"P" represents angular momentum,

then "I" represents the vector cross product of R and P.

To calculate the cross product of R and P, you can use the right-hand rule:

1. Place your right hand with your fingers in the direction of R.

2. Curl your fingers towards the direction of P.

3. Your thumb will then point in the direction of the resulting vector I.

Explanation

The rapid motion of water across a horizontal surface is due to the current

A horizontal movement of water often accompanies the rising and falling of the tide. This is called the tidal current.

Additional Information:

Ocean water moves in two directions:

1. Horizontal movements are referred to as currents
   
2. Vertical changes are called upwellings or downwellings.
   

Explanation

Let's represent the age of the son as "x" and the age of the father as "3x".

To solve for their ages, we can use the given information that the sum of their ages is 48.

1. Set up the equation:

- x + 3x = 48

2. Simplify and solve the equation:

- 4x = 48

- Divide both sides of the equation by 4:

- x = 12

3. Calculate the ages:

- The age of the son (x) is 12 years old.

- The age of the father (3x) is 3 * 12 = 36 years old.

Therefore, the son is 12 years old and the father is 36 years old.

Explanation

The freedom of international flight routes is typically governed by the Open Skies Agreement,

which promotes liberalization and removes restrictions on aviation markets between participating countries.

Additional Information:

The Free Air Agreement is not a widely recognized term in the context of international flight routes.

Explanation

the widening of a river when it opens into the sea is known as an estuary.

Estuaries are vital ecosystems that support diverse life forms

Examples are San Francisco.

Additional Information:

Meander:

It is a series of curves, bends, and loops that turn in the channel of a river 

Gorge:

It is a narrow valley between hills and mountains and a stream flows through it

Creek:

It is a stream tributary of a river