Explanation

The Twin Paradox is a consequence of time dilation in special relativity.

Explanation

Passage

Unemployment is a key index of economic slack and lost output. But it is not distributed in proportion to people’s ability to face it. It affects painfully the young, women, the unskilled as well as semiskilled, the black person, the older people, and underemployed people in rural areas. The unemployment among specific groups means greater costs to society that can be calculated easily in hours of idleness or dollars of income lost. The other costs include disturbance of the careers and increased juvenile delinquency. There is another cost of unemployment. For labors, continuous unemployment results in “share-the-work” pressures for shorter hours and escalate resistance to technological advances. On business side, the shortcomings of markets results in attempts to raise prices to cover increased costs and to pressures for protection against buying products from abroad.

Question 1: Unemployment is an index of (A) the employment rate (B) economic slack and lost output (C) diminished resources (D) over utilization of capacity Question 2: According to the passage, the unemployment falls most heavily upon all except the (A) unskilled worker (B) semiskilled worker (C) black people (D) white middle class Question 3: The cost to society of unemployment can be measured by all except (A) disruption of careers (B) idleness (C) the death rate (D) lost incomes

Question 4: Serious unemployment results in labor groups to demand

(A) more jobs with shorter hours

(B) “no fire” policies

(C) higher wages to those employed

(D) cost-cutting solutions

Question 5: A normal business reaction to a recession is to press for

(A) restrictive business practices

(B) protection against imports

(C) government action

(D) higher unemployment insurance

Explanation

In the diffraction pattern of a single slit, the central maximum or the center is usually bright.

Explanation

For interference of light to occur, the light must be monochromatic, meaning it consists of only one wavelength or color.

Explanation

If the conductor carrying current experiences a magnetic force at an angle of 90 degrees, and then the angle decreases to 60 degrees, the force will decrease because the component of the magnetic field perpendicular to the current-carrying conductor decreases as the angle decreases.

Explanation

The expression (1-v^2/c^2)^-0.25 is always greater than one because it represents the Lorentz factor, which accounts for time dilation and length contraction in special relativity.

Explanation

If the current is into the page and the wire is perpendicular to the page, then the magnetic field will be directed counterclockwise.

Explanation

The purpose of using an umbrella in the rain is to protect oneself from getting wet.

Explanation

The minimum number of diodes required for full-wave rectification using a bridge rectifier is four.

Explanation

Electromagnetic waves are produced due to the flow of charges, specifically both positive and negative charges.