Physics, 21.04.2021 16:40, alexismoore15567
14. When incoming light rays strike a flat, plane mirror at an
angle close to the surface of the mirror, the reflected rays
are
A. parallel to the mirror's surface
B. close to the mirror's surface
C. perpendicular to the mirror's surface
D. inclined high above the mirror's surface
Vouansinar choica:
Answers: 3
Physics, 22.06.2019 06:00, jagmeetcheema
The frequency of vibrations of a vibrating violin string is given by f = 1 2l t Ï where l is the length of the string, t is its tension, and Ï is its linear density.â (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and Ï are constant) (ii) the tension (when l and Ï 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 â f is â (ii) when the tension is increased by turning a tuning peg df dt 0 and t is â f is â (iii) when the linear density is increased by switching to another string df dÏ 0 and Ï is â f is â
Answers: 3
Physics, 22.06.2019 07:00, lujaynsparkles
Which articulations allow for greatest range of motion?
Answers: 1
Physics, 22.06.2019 09:00, cmflores3245
Sobre transformaçÔes cĂclicas, sĂŁo feitas algumas afirmaçÔes, determine quais estĂŁo corretas. i â a variação de energia interna em uma transformação cĂclica Ă© nula; ii â o trabalho, em uma transformação cĂclica, Ă© sempre positivo; iii â ao completar um ciclo, o gĂĄs tem a mesma temperatura com a qual começou a transformação; iv â uma transformação cĂclica Ă©, obrigatoriamente, composta de transformaçÔes conhecidas, como adiabĂĄtica, isocĂłrica, etc: a) i e iii b) i e ii c) ii e iii d) i e iv e) iii e iv
Answers: 1
Physics, 22.06.2019 11:00, Arielledt10
1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?
Answers: 1
14. When incoming light rays strike a flat, plane mirror at an
angle close to the surface of the m...
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