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Correct answer
A. P1 – P2 = 1/2 ρV22
Explanation
P1 – P2 = 1/2 ρV22 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. 1.5
Explanation
One moves at 60km/h, so in an hour, he’ll travel 60km The other moves at 40km/h, so in an hour, he’ll travel 40km This is towards each other, so, in an hour, we can say that they’ll get 60+40=100km closer. This means that they get closer at 100km/h Given that we have the distance of 150km, and the speed of closure at 100kmh, we can now use the equation S=D/T Rearrange to find T (times both sides by T) S x T = D (now divide both sides by S) T=D/S Time = 150km divided by 100km/h Time = 1.5 hours Or one hour and 30 minutes
Correct answer
A. Angular motion
Explanation
Angular motion is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. 108 ohm metre
Explanation
108 ohm metre is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. frequency is greater than 20 kHz
Explanation
frequency is greater than 20 kHz is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. work done
Explanation
work done is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. The average kinetic energy of the photoelectrons decreases
Explanation
The average kinetic energy of the photoelectrons decreases is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. 2.6×10⁶ m/s
Explanation
2.6×10⁶ m/s is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Joule effect
Explanation
Joule effect is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. Frequency modulated
Explanation
The audio signals of TV are Frequency modulated. Analog TV sound is also broadcast using frequency modulated (FM). Narrowband FM is used for voice communications in commercial and amateur radio settings.