What are some examples of primary and secondary sources? Primary and secondary source examples Primary source Secondary source Letters and diaries written by a historical figure Biography of the historical figure Essay by a philosopher Textbook summarizing the philosopher’s ideas Photographs of a historical event Documentary about the historical event What are examples of sources? […]
Why is momentum not always conserved?
Why is momentum not always conserved? The total momentum of both objects does not change. For this reason we say that the total momentum of the interacting objects is conserved. Newton’s third law implies that the total momentum of a system of interacting objects not acted on by outside forces is conserved. Is angular momentum […]
What does hypothesis mean in simple terms?
What does hypothesis mean in simple terms? A hypothesis is a suggested solution for an unexplained occurrence that does not fit into current accepted scientific theory. The basic idea of a hypothesis is that there is no pre-determined outcome. What is the best definition for the word prediction? A prediction is what someone thinks will […]
How do you know if a spring is ideal?
What is the difference between loudness and frequency?
What is the difference between loudness and frequency? Frequency (the number of vibrations or sound waves per second) is measured in Hertz (Hz). A sound that is 4,000 Hz (like the sound the letter “F” makes) has 4,000 waves per second. Intensity (loudness) is the amount of energy of a vibration, and is measured in […]
What makes a boiling egg float?
Can alcohol be used in a thermometer?
Can alcohol be used in a thermometer? The two common liquids used in liquid in glass thermometers are alcohol (ethanol) and mercury. alcohol is not used in thermometer. Are alcohol based thermometers accurate? Alcohol thermometers are also inexpensive and durable. They are typically not as accurate as mercury thermometers because of the alcohol’s susceptibility to […]
What are the two types of athletics?
What are the two types of athletics? There are two types of athletics events: track and field. Track events are running and walking races. Field events are jumping and throwing contests. Objects thrown by athletes include a hard disk, called a discus, and a light spear, called a javelin. What is the another name of […]
Are high luminosity stars rare?
Are high luminosity stars rare? The volume of space included within a distance of 5000 light-years, however, is enormous; so even though highly luminous stars are intrinsically rare, many of them are readily visible to our unaided eye. Does Chemo age your face? The study authors said a wide-ranging review of scientific evidence found that: […]
What type of epithelial tissue looks stratified but is not?
What type of epithelial tissue looks stratified but is not? Pseudostratified columnar epithelium is a type of epithelium that appears to be stratified but instead consists of a single layer of irregularly shaped and differently sized columnar cells. In pseudostratified epithelium, nuclei of neighboring cells appear at different levels rather than clustered in the basal […]