Who found atom first? Democritus Why can’t scientists see inside an atom? Almost all of an atom’s mass comes from the protons and neutrons in the nucleus. However, because electrons orbit around the nucleus, most of an atom is empty space! You can’t see atoms with the naked eye, because they’re simply too small. Using […]
Is it possible for a solid metal ball to float in mercury?
What happens to kinetic energy when momentum is doubled?
What happens to kinetic energy when momentum is doubled? Kinetic energy is directly proportional to the squared of the velocity. This means that when momentum is doubled, mass remaining constant, velocity is doubled, as a result now kinetic energy becomes four times greater than the original value. Are momentum and kinetic energy the same? They […]
Why do electrons move freely in metals?
Why do electrons move freely in metals? The valence electrons of metals move freely in this way because metals have relatively low electronegativity, or attraction to electrons. The positive metal ions form a lattice-like structure held together by all the metallic bonds. When nonmetals bond together, the atoms share valence electrons and do not become […]
Which line is parallel to Y 2×2?
What is the principle of Maldi-Tof?
What is the principle of Maldi-Tof? MALDI is the abbreviation for “Matrix Assisted Laser Desorption/Ionization.” The sample for MALDI is uniformly mixed in a large quantity of matrix. The matrix absorbs the ultraviolet light (nitrogen laser light, wavelength 337 nm) and converts it to heat energy. What is the role of Reflectron in Maldi-Tof? A […]
How do you find cosine 300 degrees?
How do you find cosine 300 degrees? Since cos(60∘)=12 , we know that cos(300∘)=12 as well since cos(θ)>0 in the fourth quadrant. Which of the following is equal to COS 300? Important Angle Summary θ° θradians cos(θ) 225° 5π/4 -√2/2 240° 4π/3 -1/2 270° 3π/2 0 300° 5π/3 1/2 Which of the following is equivalent […]
Which diamond shape is cheapest?
Which diamond shape is cheapest? The cheapest diamond cuts that you can purchase are the Asscher diamond cut and the Emerald diamond cut. Asscher shapes and Emerald shapes are cheaper is because of two factors. When cutting the rough diamond, they lose more weight. In which country Diamond is most expensive? Most Expensive Diamonds Comparison […]
What type of energy is microwave?
What type of energy is microwave? Microwaves are a form of “electromagnetic” radiation; that is, they are waves of electrical and magnetic energy moving together through space. Electromagnetic radiation spans a broad spectrum from very long radio waves to very short gamma rays. What is any form of stored energy called? Potential energy is stored […]
What are the 9 types of assessment?
What are the 9 types of assessment? Poonam Mata – M6U1A1 – Nine Types of Assessment Mind Map. Diagnostic (3) Definition: It is a form of pre-assessment that allows teachers find out students knowledge, skills, strengths and weaknesses before the lesson. Formative (3) Summative (3) Performance-based (4) High Stake (5) Portfolio(1) Authentic (2) What is […]