Category: Physics

Do we breathe nitrogen? We actually breathe air. It contains many gases like nitrogen, oxygen, carbon dioxide and argon among many others. Although nitrogen is the largest component of the inhaled air, it is inert and has no effect on our body. And the air exhaled also contains nitrogen, oxygen, carbon dioxide etc. Is nitrogen […]

Between what two values are the middle 50% of the diameters? The middle 50% of the scores are between 70.9 and 91.1. What is the formula for z score in Excel? 5. To calculate the z-score of a specific value, x, type the following formula in an empty cell: = (x – [mean]) / [standard […]

What are the types of sound based on frequency? Pitch, in turn, depends on the frequency of sound waves. High-frequency sound waves produce high-pitched sounds, and low-frequency sound waves produce low-pitched sounds. Infrasound has wave frequencies too low for humans to hear. Ultrasound has wave frequencies too high for humans to hear. How many sounds […]

What must be applied in order to set a resting body in motion? What must be applied in order to set a resting body in motion?… Potential energy. Work. Force. Which type of radiation is created when the primary beam interacts with matter? Primary radiation is the x-rays that come from the target of the […]

Does light have shape? A pulse of light can have almost any shape in space and in time, determined by the amplitudes and phases of its frequency components. Surprisingly, single photons can also be generated in a variety of complex shapes. Is light a 2D or 3D wave? Spring waves are examples of 1D waves, […]

What age is best to move out? Many commentators agreed that 25 – 26 is an appropriate age to move out of the house if you are still living with your parents. The main reason for this acceptance is that it’s a good way to save money but if you’re not worried about money you […]

Should I kill cicadas? While it can be tempting to use pesticides on cicadas, there’s really no need. “Treating yards to kill cicadas will result in an unnecessary application of pesticides to the environment and treating these insects directly may also sicken animals who then try to eat them,” Troyano says. Are cicadas coming in […]

What is the most important thing in a golf swing? Use the big muscles of your legs and trunk to move the little muscles of your arms and hands. So watch the players at impact – they are all the same – and that is the most important part of any golf swing. Are Nitro […]

What do the colors on weather radar mean? Typically, the heavier the rain, the warmer the color. So, green usually means light rain, yellow means moderate rain, and red means heavy rain or hail. The green colors indicate winds moving towards the radar, and the red colors indicate winds moving away from the radar. What […]

What is the largest type of galaxy in our universe? giant ellipticals How do I backup my Mac onto a hard drive? Select your storage device as the backup disk Open Time Machine preferences from the Time Machine menu in the menu bar. Or choose Apple menu  > System Preferences, then click Time Machine. […]