1). A Russia-Germany research collaboration2). has used femtosecond (m

1.	1). A Russia-Germany research collaboration2). has used femtosecond (millionths of a billionth of a second)3). laser pulses to4). make a insulating material
Answer» The CORRECT answer is OPTION 4, i.e. make a insulating material. The error is in part D, where the article ‘a’ is used incorrectly and must be replaced with ‘an’. The word ‘insulating’ begins with a vowel sound, hence, ‘an’ must be used. Hence, the statement can be correctly written as, ‘A Russia-Germany research COLLABORATION has used femtosecond (millionths of a billionth of a second) laser pulses to make an insulating material conduct electricity’.

1). A Russia-Germany research collaboration2). has used femtosecond (millionths of a billionth of a second)3). laser pulses to4). make a insulating material

Answer»

The CORRECT answer is OPTION 4, i.e. make a insulating material.

The error is in part D, where the article ‘a’ is used incorrectly and must be replaced with ‘an’. The word ‘insulating’ begins with a vowel sound, hence, ‘an’ must be used.

Hence, the statement can be correctly written as, ‘A Russia-Germany research COLLABORATION has used femtosecond (millionths of a billionth of a second) laser pulses to make an insulating material conduct electricity’.

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1). A Russia-Germany research collaboration2). has used femtosecond (millionths of a billionth of a second)3). laser pulses to4). make a insulating material

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