Recent content by missileblitz

Ah of course, the frequency remains constant.

I'm confused. When the density of the medium changes, doesn't the speed and wavelength change, hence a change in frequency hence f = v/(lambda)?

Homework Statement Sound travels slower in the cold air than warm air. If you place your sound system outside on a cold winter night and listen to your favourite music, will the frequency of the sound change (pitch change)? Homework Equations f x (lambda)= vThe Attempt at a Solution...

Many thanks for your reply!

:O no one?

Thanks for the reply! I'd like someone to confirm the second question too. Thanks in advance.

Question #1 Homework Statement How much heat will be lost when 120 g of steam at 100°C is condensed to water at 80°C?Homework Equations Q = mc∆t Q = m LV The Attempt at a Solution Q = mc∆t Q = 0.12 x 4186 x (80 – 100) Q = 10046.4 J Q = m LV Q = 0.12 x (- 2.3 x 106) Q = 276000 J = 10046.4 +...

So basically I've had a go on the question with the help of the previous posts: [PLAIN]http://img532.imageshack.us/img532/6052/physicsi.png So to find the left side of the triangle (lets say n): 50 x cos30 = n n = 43.3 The string is 50cm 50 - 43.3 = 6.70 cm x = 6.70cm =0.0670m...

Homework Statement A pendulum consists of a mass on a 50 cm long string. It is being held stationary at a 30°angle with the vertical. After release, how fast will it be going at the bottom? (Hint: Use trigonometry to find how high the ball is initally) Homework Equations Ek =...