Physics, 10.12.2021 01:30 BigGirlsTheBest
PLEASE HURRY If a step-down transformer has 4580 Turns in its Primary. When the voltage across the primary is 6798 V, the voltage across the secondary is 150V. How many turns are in the secondary?
Answers: 3
Physics, 22.06.2019 06:00
The frequency of vibrations of a vibrating violin string is given by f = 1 2l t Ļ where l is the length of the string, t is its tension, and Ļ is its linear density.ā (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and Ļ are constant) (ii) the tension (when l and Ļ are constant) (iii) the linear density (when l and t are constant) (b) the pitch of a note (how high or low the note sounds) is determined by the frequency f. (the higher the frequency, the higher the pitch.) use the signs of the derivatives in part (a) to determine what happens to the pitch of a note for the following. (i) when the effective length of a string is decreased by placing a finger on the string so a shorter portion of the string vibrates df dl 0 and l is ā f is ā (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ā f is ā (iii) when the linear density is increased by switching to another string df dĻ 0 and Ļ is ā f is ā
Answers: 3
Physics, 22.06.2019 07:40
Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?
Answers: 3
Physics, 22.06.2019 14:40
14. a body is projected with velocity vi from a.at the same time another body is projectedvertically upwards from point b withvelocity v2 lies vertically below the highestpoint. both the bodies collide thenv2Ć·v1is
Answers: 1
Physics, 23.06.2019 00:20
What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%
Answers: 2
PLEASE HURRY
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