How do scientists know the universe is expanding simple? American astronomer Edwin Hubble and others discovered in the 1920s that the Universe is expanding by showing that most galaxies are receding from the Milky Way — and the farther away they are, the faster they are receding. The roughly constant ratio between speed and distance […]
Can blood type O drink alcohol?
Can blood type O drink alcohol? People with type O blood should avoid drinking the following, according to the diet plan: beer. coffee. distilled liquor. Do O blood types live longer? In a survey of German doctors aged >75 years, group O appeared to be associated with longer life expectancy9. Findings of two studies performed […]
What increases when frequency increases?
What increases when frequency increases? From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer. There are two basic types of waves: mechanical and electromagnetic. What is the highest frequency ever generated? At least ~100 GeV, which corresponds to 2*1025 Hz. I […]
What are the possible sources of error in a bomb calorimetry experiment?
What are the possible sources of error in a bomb calorimetry experiment? Sources of error include the percent error in water measurement and incomplete vaporization of the nichrome wire. The internal volume of the Parr-bomb was measured to be 341mL. Why is benzoic acid used to calibrate a bomb calorimeter? Benzoic acid (C6H5CO2H) is often […]
How far from the wall is the foot of the ladder?
How far from the wall is the foot of the ladder? 22.56 feet What is the spacing between steps on a ladder? (i) Rungs, cleats, and steps of portable ladders (except as provided below) and fixed ladders (including individual rung/step ladders) shall be spaced not less than 10 inches (25 cm) apart, nor more than […]
Is cooking a chemical change?
Is cooking a chemical change? Rotting, burning, cooking, and rusting are all further types of chemical changes because they produce substances that are entirely new chemical compounds. For example, burned wood becomes ash, carbon dioxide, and water. An unexpected color change or release of odor also often indicates a chemical change. What type of chemical […]
How long do rechargeable batteries last if not used?
How do you calculate how high an object will go?
What is the effect of unbalanced forces?
What is the effect of unbalanced forces? An unbalanced force can change an object’s motion. An unbalanced force acting on a still object could make the object start moving. An unbalanced force acting on a moving object could make the object change direction, change speed, or stop moving. What would the resultant force on an […]
Why autonomous systems are important?
Why autonomous systems are important? Advantages of autonomous systems are their ability to go into places and situations where humans cannot. This includes dangerous places, such inspecting inside nuclear reactors to check for faults, and inaccessible places, such as inside aero-engines. What does autonomous mean? 1a : having the right or power of self-government an […]