A PocketLab Voyager Hand Dynamometer
Hand and finger strength is vital in many aspects of life--from sports such as rock climbing to jobs including airline baggage workers. PocketLab Voyager's tactile sensor can be used to construct a very simple hand dynamometer to measure strength of a person's hands and fingers. Figure 1 shows a simple dynamometer constructed by the author. It consists of a 2" x 2" x 4" block of wood to which the PocketLab tactile sensor has been attached using removable double stick poster tape.
Do you really know how to walk or run? PocketLab's tactile pressure sensor provides for an opportunity for your students to investigate foot pressure during these activities. Improper form can ultimately lead to unwanted visits to a podiatrist. Whenever you take a step, your body places pressure on muscles, joints and tendons in your legs, knees, ankles, feet and toes. Controlling heel pressure is a key factor to prevent injuries in this regard.
What causes the seasons on Earth?
Weather is always changing. Humans have been dividing up the year based on these changes in weather for thousands of years. A division of a year based on weather is called a season. Different regions of the Earth have different names for seasons and different types of seasons. The most common seasonal names used are Winter, Spring, Summer, and Fall.
The eye is one of the many marvels of the human body. The colored iris of the eye, surrounding the pupil, acts as a diaphragm to keep the amount of light entering the eye fairly constant. If you walk out the door of your house to a sunny yard, the iris opening gets smaller letting less light into your eye. If you enter a dark room after watching your favorite television program, the iris gets larger to allow more light to enter your eye. This is a protective reflex, as too much light could damage the retina, which is where the image forms in the eye, similar to the film of a traditional
This lesson is motivated by a respiration study using a FLIR ONE™ thermal camera in conjunction with the Vernier Thermal Analysis Plus app. Using Voyager and the PocketLab Temperature Probe, however, allows students to investigate respiration at a fraction of the cost of a thermal camera. The response time for the Temperature Probe is rapid enough to observe temperature differences in the air inhaled and exhaled through the mouth during the process of respiration.
A spirometer is an apparatus often used in the medical field to find the cause of shortness of breath. A spirometer can rule out lung diseases like asthma, bronchitis, and emphysema. A spirometer can measure forced vital capacity. Forced vital capacity is the amount of air exhaled during a forced breath. Explore what factors affect forced vital capacity.