Explanation

Joule is a unit of work or energy or heat.

Joule is a scalar quantity.

Explanation

An ocean current is a continuous, directed movement of seawater.

Ocean current is generated by:

• A number of forces acting upon the water including wind
• The Coriolis effect
• Breaking waves
• Cabbeling
• Temperature and salinity differences.

Additional Information:

Ocean floods:

Coastal flooding occurs when dry and low-lying land is submerged (flooded) by seawater

Cyclone:

Cyclones are caused by atmospheric disturbances around a low-pressure area distinguished and often destructive air circulation.

Tsunami:

Tsunamis are giant waves caused by earthquakes or volcanic eruptions under the sea.

Explanation

A vector quantity is a physical quantity that has both magnitude and direction. 

Acceleration, electric field, and velocity are vector quantity because It has both magnitude and direction.

Additional information:

a scalar quantity only has magnitude.

Mass, temperature, and kinetic energy, volume,  are scalar quantities because they all contain only magnitude

Explanation

Abyssal hills form in the young oceanic lithosphere near mid-ocean ridges. 

They are the most abundant geomorphic structures on Earth

They cover more than 30% of the ocean floor.

The greatest abundance of abyssal hills occurs on the floor of the Pacific Ocean.

Explanation

For every known physical environment, physicists have posited laws that govern the occurrence of that phenomenon. It can be concluded, therefore that every known physical phenomenon is governed by the same law.

Question:

The Flawed reasoning in the argument above is most similar to that in which one of the following?

A. The Truck of Every tree is a body that contains, both the xylem and phloem. therefore, any body of tissue that contains both xylem and phloem is the trunk of a tree.

B. Every house has a unique mailing address. therefore, because these packages are all marked with the same mailing address, they will all be sent to the same house.

C. Because every action taken by a person can be explained by unconscious motives, a sngle motive explains all of the actions taken by any person

B. No violin that was made in the twentieth century is remarkably valuable. Because this violence is remarkably valuable, it must not have been made in the twentieth century.

Correct option C (according to CAA ANSWER KEY 2019)

Explanation

Apart from the sign,

the magnification factor, m, is equal to i/o

"I" is the image distance from the lens 

"o" is the object distance.

we have m=i/o

(8cm) / (20cm)

= 2/5.

Explanation

The centripetal force necessary to keep the racing car in its circular path is indeed provided by friction between the tires of the car and the track.

Concept:

When the car is moving in a circular path, it experiences an inward acceleration towards the center of the circle.

This acceleration is called the centripetal acceleration.

According to Newton's second law of motion, the net force acting on an object is equal to the mass of the object multiplied by its acceleration.

In this case, the net force is the centripetal force, and the centripetal acceleration can be calculated using the formula:

a_c = v^2 / r

Where:

- a_c is the centripetal acceleration

- v is the speed of the car

- r is the radius of the circular track

Substituting the given values into the formula:

a_c = (50.0 m/s)^2 / 250 m

Simplifying the equation:

a_c = 2500 m^2/s^2 / 250 m

a_c = 10 m/s^2

The centripetal force required to keep the car in its circular path is equal to the product of the car's mass and the centripetal acceleration.

Using the given mass of the car:

F = (2.00 x 10^3 kg) * (10 m/s^2)

Simplifying the equation:

F = 2.00 x 10^4 N

Therefore, the centripetal force necessary to keep the car in its circular path is provided by friction and its value is 2.00 x 10^4 Newtons.

Explanation

A subcommittee of the Senate's foreign Relations committee Consists of three Republicans Rameez, Saad, and Tahir, and three Democrats Waqas, Yawer, and Zaheer. Three of these six senators need to visit Moscow to meet with Russian Leaders. The decision as to which senators will make the trip is subject to the following conditions:

1. The three senators making the trip cannot be from the same party.
2. Rameez and Saad Cannot both make the trip.
3. Neither Tahir nor Yawer will make the trip unless the other one does, Waqas will not make the trip unless Zaheer does.

Question no 1:

Which of the following is a list of three senators who could make the trip together?

A. Rameez, Yawer, Zaheer

B. Rameez, Tahir,  Yawer

C. Rameez, Saad, Yawar

D. Tahir, Waqas, Yawar

E. Waqas, Yawar, Zaheer

correct option: B

Question no 2:

If Rameez and Zaheer are selected to make the trip, which of the following must be true?

A. More Democrats than Republicans make  the trip 

B. More Republication than Democrats make the trip 

C. Saad makes the trip

D. Tahir makes the trip

E. Yawar makes the trip

correct option: A

Question no 3:

If the Saad decides to send four of these senators, subject to the same conditions, all of the following must be true Except?

A Tahir makes the trip

B. Yaer makes the trip

C. Zaheer makes the trip

D. Rammez or Saad makes the trip

E. If Waqas makes the trip, then Rameez doesn't make the trip

correct option: D

Question no 4:

If  More Republication than Democrats make the trip, which of the following must be among the senators making the trip?

A. Rameez

B. Saad

C. Waqas

D. Yawer

E. Zaheer

correct option: D

Explanation

Analytical Reasoning:

Iqbal Road is one block long, On one side of the toad there are seven houses, numbered 2, 4, 6, 8, 10, 12, and 14, in that order, from left to right. Each of these houses is owned by exactly one of the following seven house owners: A, r, S, T, U, V, and W. The following information is known about these homeowners

1. T lives in house number 2 or house number 14
2. Neither Q nor R lives next door to W
3. If V loves at either end of the block, he lives next door to R.
4. 5 lives next door to either U or W, possibly both

Question no 1:

If V lives at 14 Iqbal Road, Nad W lives next door to T, what is the number of W's house?

A. 2

B. 4

C. 8

D. 10

E 12

Correct answer B

Question no 2:

if V and Q live at 2 Iqbal Road and 12 Iqbal Road, respectively, all of the following must be true Except?

A/ R lives at 4 Iqbal Road

B. T lives at 14 Iqbal Road

C. W lives at 8 Iqbal Road 

D. S lives next door to U 

E. S lives next door to R or Q

Correct answer D

Question no 3:

If V lives at one end of the block, which of the following could be the owners, in order, of the houses at numbers 4, 6, 8, 10, and 12?

A. R, S, Q, U, W

B. R, S, W, Q, U

C. Q, U, R, S, W

D. Q, U, S, W, R

E. Q, U, W, S, R

Correct answer E

Explanation

To determine the frequencies of the fundamental and first two harmonics, we can use the formula:

f = v / (2L)

Where:

- f is the frequency of the harmonic

- v is the speed of sound in air

- L is the length of the pipe

Given that the length of the pipe is 1m and the speed of sound in air is 340 m/s, we can calculate the frequencies as follows:

For the fundamental frequency (first harmonic):

f1 = v / (2L)

= 340 m/s / (2 * 1m)

= 170 Hz

For the first overtone (second harmonic):

f2 = 2 * f1

= 2 * 170 Hz

= 340 Hz

For the second overtone (third harmonic):

f3 = 3 * f1

= 3 * 170 Hz

= 510 Hz

Therefore, the frequencies of the fundamental and first two harmonics for the pipe open at both ends are approximate:

- Fundamental frequency: 170 Hz

- First overtone: 340 Hz

- Second overtone: 510 Hz