How do crumple zones save lives? Crumple zones add time to the crash by absorbing energy. Crumple zones allow the front of the vehicle to crush like an accordion, absorbing some of the impact of the collision and giving some off in the form of heat and sound. Are crumple zones compulsory? All new vehicles […]
What happens if you cut or mow a dandelion?
What happens if you cut or mow a dandelion? Although dandelions that have been mowed down will grow back, destroying developing flowers before they are able to mature into seed distributors prevents the opportunity for new germination. Mulched clippings left on the lawn promote grass health and also inhibit the germination of dandelion seeds on […]
What can beta particles be stopped by?
What can beta particles be stopped by? Beta particles are more penetrating than alpha particles, but are less damaging to living tissue and DNA because the ionizations they produce are more widely spaced. They travel farther in air than alpha particles, but can be stopped by a layer of clothing or by a thin layer […]
What is the amount of heat needed to raise 1g of a substance 1 C?
What airspace is above Class A?
What airspace is above Class A? With some exceptions, Class A airspace is applied to all airspace between 18,000 feet (5,500 m) and flight level (FL) 600 (approximately 60,000 ft). Above FL600, the airspace reverts to Class E. The transition altitude is also consistently 18,000 feet (5,500 m) everywhere. What are the six classifications of […]
What are two real world applications of the Doppler effect?
What are two real world applications of the Doppler effect? The Doppler effect has several real-world applications. For example, besides police radar, the Doppler effect is used by meteorologists to track storms. Doctors even used the Doppler effect to diagnose heart problems. What is the difference between an ultrasound and a Doppler? A regular ultrasound […]
What is meant by the absolute refractory period?
What is meant by the absolute refractory period? : the period immediately following the firing of a nerve fiber when it cannot be stimulated no matter how great a stimulus is applied. — called also absolute refractory phase. — compare relative refractory period. How long is the absolute refractory period? about 0.4 ms Why is […]
What are the three types of binary systems?
What are the three types of binary systems? — There are three types of binaries: visual, which means you can actually see the two stars in a telescope (no orbiting binaries have a wide enough separation to be seen with the naked eye); spectroscopic, which means you can see the presence of the orbit due […]
Is netball a girl sport?
Is netball a girl sport? Netball occupies the rather unique position of being one of the few sports that is almost exclusively played by women. Although almost 20,000 men played netball every fortnight in 2019, in both mixed and all-male teams, after primary school netball is pretty much a women’s sport. Which is better netball […]
What is the similarities between speed and velocity?
What is the similarities between speed and velocity? Speed and velocity both represent a way to measure the change in position of an object relative to time. In fact, for a straight line motion, the speed and velocity of an object are the same (since distance and displacement will be the same). Speed and velocity […]