Recent content by Ronaldo21

for number 1, we're trying to find distance arent we? not velocity. and for 2, well i converted km/h to m/s.

Fundamental frequency! 1. Ultrasound with a frequency of 4.079 MHz can be used to produce images of the human body.If the speed of sound in the body is the same (1.97 km/s) as in salt water, what is the wavelength in the body? Answer in units of m. and 2. On a day when the wind is...

hmm i think i get it so the answer will be some kind of formula then right??

so what do we exactly do? because we don't have the number to d and e. i think i get b.

1. A 600-N block is lifted by the friction-free pulley system shown. a. How many strands of rope support the 600-N weight? b. What is the tension in each strand? c. What is the tension in the end help by the man? d. If the man pulls his end down 60 cm, how many cm will the weight...

A big metal bead slides due to gravity along an upright frictiion-free wire. It starts from rest at the top of the wire as shown in the sketch. How fast is it traveling as it passes. http://https://www.physicsforums.com/attachment.php?attachmentid=22509&stc=1&d=1260854052 Point B? Point...

Momentum. I did all of them, can u check if i got them right!? thank you! 1. A moving car has momentum. If it moves twice as fast, its momentum is TWICE as much. 2. Two cars, one twice as heavy as the other, move down hill at the same speed. Compared to the lighter car, the momentum of the...

that'll just give me 32,870.74672 as an answer. it looks big.

any help? I am just so confused!

hmm. i don't get it :(

Basic Momentum and Energy! and time! 1. A 5.36 g bullet moving at 681.8 m/s penetrates a tree trunk to a depth of 3.79 cm. a) Use work and energy considerations to find the magnitude of the force that stops the bullet.Answer in units of N. for this i did 1/2mv^2=w=fd so...

Basic Momentum and Energy! 1. (part 1 of 2) A 4.78 g bullet moving at 510.8 m/s penetrates a tree trunk to a depth of 4.93 cm. a) Use work and energy considerations to find the magnitude of the force that stops the bullet. Answer in units of N. for this i did 1/2mv^2=w=fd so...

nevermind, i understand! thank you sooo much!

ohh! gotcha! thank you very much!

-? why negative??