Friday
April 18, 2014

Homework Help: Science-Plz Help (I have a Test)

Posted by Liz on Monday, January 25, 2010 at 7:02pm.

I need to check my answers!!

Which of these is not in the family
a. sound
b. light
c. infrared radiation (answer)
d. radio waves

When an electric charge is shaken to and fro in quick succession, the vibrating charge emits
a. infrasonic sound
b. Ultrasonic sound
c. an electromagnetic wave (answer)
d. gamma radiation

If you dip your finger repeatedly onto the surface of still water, you produce waves. The more frequently you dip your finger, the
a. lower the wave frequency and the longer the wavelength
b. higher the wave frequency and the shorter the wavelength (answer)
c. both of the above
d. neither

Low-pitched sounds have
a. low frequencies
b. long periods
c. both (answer)
d. none

I was so confused by this question!! Any advice??

Suppose at a concert a singerís voice is a radio broadcast all the wave around the world before reaching the radio you hold to your ear. This takes 1/8 seconds. If youíre close, you her her voice in the air before you hear it from the radio. But, if you are far away, both singnals will reach you at the same time. How many meters distant must you be for this to occur!!

Would it be 1 meter or 8 meters?? I think itís 8!

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

Science - I need to check my answers!! Which of these is not in the family a. ...
Science - I need to check my answers!! Which of these is not in the family a. ...
Science Sorry I just need help one more time! - Ok I am doing a project in ...
Science - Does infrared radiation or ultraviolet radiation have wavelengths that...
physics - Please could someone advise me on answering this question. I need to ...
IPC - The peak intensity of radiation from Star Beta is 350 nm. In what spectral...
physics - If you are sitting at home in your room, the walls please help me pick...
science - In the process called fluorescence, some substances absorb photons of ...
college physics - If you are sitting at home in your room, the walls 1. emit ...
Science - in the process called Fluorescence, some substances absorb photons of ...

Search
Members