How long is a train which passes a signal in? Answer. Answer: Length of Train = 600 m if it passes a signal in 20 sec at 108 km/hr. What is the time taken by a train running at 54 km? = 12.5 sec. Was this answer helpful? What is the time taken by a […]
What makes a full sentence?
What makes a full sentence? Sentences always begin with a capital letter and end in either a full stop, exclamation or question mark. A complete sentence always contains a verb, expresses a complete idea and makes sense standing alone. This is now a complete sentence, as the whole idea of the sentence has been expressed. […]
How many electrons are ejected?
How many electrons are ejected? Each packet or photon could cause one electron to be ejected, which is like having a moving particle collide with and transfer energy to a stationary particle. Can electrons be ejected? When light shines on a metal, electrons can be ejected from the surface of the metal in a phenomenon […]
How was the Hubble constant discovered?
How was the Hubble constant discovered? How the Hubble constant was discovered. The Hubble constant was first calculated in the 1920s, by American astronomer Edwin Hubble. By knowing how bright a Cepheid truly is and how dim its light appeared when seen from Earth, Hubble was able to derive the Cepheid’s distance. Which Hubble plot […]
Why do humans behave the way they do psychology?
Why do humans behave the way they do psychology? The answer is deceptively simple and very powerful. People behave the way they do because… Their behavior gets them what they want. And, as a consequence, they won’t change their behavior until it stops getting them what they want. What are the two disciplines of psychology? […]
What are the two main factors of tectonic plates movement?
What are the two main factors of tectonic plates movement? The forces that drive Plate Tectonics include: Convection in the Mantle (heat driven) Ridge push (gravitational force at the spreading ridges) Slab pull (gravitational force in subduction zones) What new information led to the theory of plate tectonics? When the concept of seafloor spreading came […]
Can Magnesium be broken down by chemical means?
Can Magnesium be broken down by chemical means? Reason: when it said a substance, think of the matter chart. Substances can be broken down to a compounds or elements. Beryllium, Boron, and Magnesium are elements and Methanol is a compound which can be chemically change. Can arsenic be broken down by a chemical change? Arsenic […]
Which mineral is a public health concern?
Which mineral is a public health concern? Calcium Declared a Nutrient of Public Health Concern The Dietary Guidelines for Americans 2015-2020 have identified calcium as one of the five nutrients of public health concern for Americans. The others are potassium, vitamin D, dietary fiber, and for women of childbearing age, iron. What are the nutrients […]
What impulse is delivered to the ball?
What impulse is delivered to the ball? The key here is that the impulse delivered by the floor to the ball equals the ball’s change in momentum. To determine the ball’s change in momentum, we have to determine the difference between its velocity upon hitting the floor, and its velocity upon rebounding. What is impulse […]
What temperature does 50/50 antifreeze freeze at?
What temperature does 50/50 antifreeze freeze at? BOILING & FREEZING POINTS Pure water, as you may know, has a boiling point of 212°F (100°C) and a freezing point of 32°F (0°C). However, when you create a 50/50 mixture using water and ethylene glycol, the boiling point rises to 223°F (106°C) and the freezing point lowers […]