Physics-> Waves and Sound

1 [2] [«Back ]   Click to Enlarge Ripple Tank with Projection Screen Project waves onto a 10 x 9" screen for viewing from a distance. Tune the wave generation of this self-contained easy-to-use apparatus to match the stroboscopic light. We include light source, adjustable 2 and 3 prong wave generators, 2 baffles and removable 12 x 10" basin. 26" total height. See Enlarge Click to Enlarge Kundt'S Apparatus Compare the ratio of the velocity of sound in brass to that in air. With our device, this elegant nineteenth century experiment is easy to perform today. Rub a brass tube (36 x 8 x 5") until it vibrates and watch the powder inside accumulate at nodal points. Measure the spacing between nodal points and compare with the length of the brass rod. Includes instructions. You need lycopodium or other fine powder. See Enlarge Click to Enlarge Oscilloscope This versatile instrument is an asset to any lab and includes its own AC power cord, spare fuse, instruction manual and two probes. Operates at 20 MHz bandwidth. +ADw-br+AD4- Displays two traces in chop or alternate modes+ADs- sensitive to 1 mV with 10 range vertical amplifier+ADs- can be used in single- and dual-trace modes+ADs- 12 calibrated deflection steps+ADs- rotate the trace with front-panel control+ADs- 1 kHz square wave internal calibration source+ADs- sharp-focus CRT is parallax free+ADs- external trigger capable +ADw-br+AD4- Specifications: +ADw-br+AD4- Vertical Amplifier: Sensitive to 5 mV, 10 steps adjustable+ADs- accuracy: 3 +ACU- accuracy+ADs- impedance: 1 Megaohm, 35 pF+ADs- max input voltage: 400 V+ADs- frequency response: 5 mV - 5 V/div: DC to 30 MHz+ADs- 1 mV/div (uncalibrated): DC to 10 MHz. +ADw-br+AD4- Horizontal Amplifier: Sensitive to 5 mV, 10 steps, adjustable between steps+ADs- accuracy: Y axis, 3+ACUAOw- X-axis, 6+ACU-. See Enlarge Click to Enlarge Sound Level Meter, Digital Simple enough for classroom use and precise enough for any application, this instrument yields sound measurements that are highly accurate. High resolution digital display is large and easy to read. Measures 40 to 130 dB with 2 dB accuracy. Select A or C weighting and fast or slow response time. Includes: carrying case, instructions, calibration tool, and windscreen. 230 x 57 x 44 mm in size. See Enlarge Click to Enlarge ound Level Meter, Analog Meets decibel frequency weighting A (dbA) ANSI specifications. Measure the typical noises of the classroom, from normal speech to nearly unbearable hallway traffic, with this versatile meter. Our dial switch detects sound on two separate ranges (35 - 80 dB and 75 - 120 dB). Signal oscillator calibration is manually adjustable. Includes: carry case and instructions. 16 x 6.5 x 4 cm in size. See Enlarge Click to Enlarge Sonometer This is a great introduction to the science of sound. Have your entire class find notes and hear the difference when the length and tension of a string is altered. Includes: sonometer base, 22 cm long; two strings; tension adjusters; three bridges, (one thick and two thin); two spring scales. See Enlarge Click to Enlarge Dynamic Microphone Unidirectional microphone, features include: 9 foot cord, 1/4? (6.3mm) adaptor, 1/8? (3.5mm) adaptor and on-off switch. See Enlarge Click to Enlarge Quincke'S Interference Tube Now you hear it, now you don't. Show how two sounds cancel each other out when added together. Two Y-shaped glass tubes are connected with rubber tubing in such a way that one path is about one-half wavelength longer than the other. When a tuning fork is held near one end and the path difference is about 65 cm, you'll hear no sound at the other end. When either tube is pinched shut, however, the tuning fork comes through loud and clear. With instructions. You need 256 or 512 Hz tuning fork, not included. See Enlarge Click to Enlarge Spring, Wave Demo 20mm X 1.8M Our stainless steel helical spring is 20 mm diameter and 1.8 m long with a constant force of 29 N/m. It can be used to demonstrate wave motion in the same way our 613-0130 wavy spring can. See Enlarge Click to Enlarge Wave Demonstration Set Two helical springs: Long spring is 3/4" x 72" and can extend 5 meters. Large spring is 3 x 4". Extends many times its length without distortion. 3 m cotton cord to suspend large spring. Ship weight: 2.5 lb. See Enlarge Click to Enlarge Boomwhackers Our set of 8 precision tuned tubes has earned the Parent's Choice award. Bang the tube on a knee or floor to hear a note from the C major diatonic scale. You can actually play music this way, selecting longer tubes for lower notes. Made of soft, colorful plastic, each tube is labeled. See Enlarge Click to Enlarge Cylindrical Spectroscope Metal teaching spectroscope. Great colors are produced by superior optics and highly accurate diffraction grating. View the spectral diffractions of various light sources and excited gasses. Includes focusing adjuster. 100mm long by 25mm diameter. See Enlarge Click to Enlarge Pinhole Viewer With this device, students learn how the intensity of light and differently shaped lenses affect what the eye actually sees. Grades 3-9. See Enlarge 1 [2] [«Back ] Go to Top