Answers: 3
Physics, 22.06.2019 04:00
Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.
Answers: 2
Physics, 22.06.2019 05:30
Thomas his older brothers, who own a junk yard, on the weekends to earn extra money. he likes to them push broken-down cars to the back of the junk yard because it makes him feel strong. last saturday, they pushed three cars with different weights, and he noticed he used different amounts of force for each one. the cars were the following weights: white car: 2,700 kg red car: 1,500 kg blue car: 2,100 kg think about how much force is needed to move each car. which correctly lists the cars in order from the most to least amount of force needed to move them? a) white, blue, red b) blue, red, white c) red, white, blue d) white, red, blue
Answers: 2
Physics, 22.06.2019 06:00
The frequency of vibrations of a vibrating violin string is given by f = 1 2l t ρ where l is the length of the string, t is its tension, and ρ is its linear density.† (a) find the rate of change of the frequency with respect to the following. (i) the length (when t and ρ are constant) (ii) the tension (when l and ρ 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 ⇒ f is ⇒ (ii) when the tension is increased by turning a tuning peg df dt 0 and t is ⇒ f is ⇒ (iii) when the linear density is increased by switching to another string df dρ 0 and ρ is ⇒ f is ⇒
Answers: 3
The velovity-time graph below is a record of the velocity of a car on a winding road. What is the ma...
Mathematics, 20.10.2020 09:01
Chemistry, 20.10.2020 09:01
Mathematics, 20.10.2020 09:01
Social Studies, 20.10.2020 09:01
Social Studies, 20.10.2020 09:01
Mathematics, 20.10.2020 09:01
Mathematics, 20.10.2020 09:01
History, 20.10.2020 09:01
Chemistry, 20.10.2020 09:01
Mathematics, 20.10.2020 09:01
Chemistry, 20.10.2020 09:01
Mathematics, 20.10.2020 09:01
Mathematics, 20.10.2020 09:01
Social Studies, 20.10.2020 09:01
English, 20.10.2020 09:01