I think it is <span>Alpha rays.</span>
Answer:
Time - taken = 2.5 s
deceleration= -8 m/s²
Solution:
Given:
speed, v = 8 m/s
distance, d = 20m
To Find:
deacceleration = ?
As we know speed is defined as
v = d/t
plugging in the values
t = 20/ 8
t = 2.5s
Now from deceleration formula
a = - v/ t
a = - 20/ 2.5
a = - 8 m/s²
Thus, the time taken and acceleration is 2.5 s and -8 m/s²
respectively.
Learn more about deceleration here:
brainly.com/question/13354629
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Answer:
2.12 J
Explanation:
Initial kinetic energy = final elastic energy + work by friction
KE = EE + W
KE = ½ kx² + W
5 J = ½ (1600 N/m) (0.06 m)² + W
W = 2.12 J
Answer: Please see below
Explanation:
Are pure substances that cannot be broken down into a simpler form---- Element
are units of two or more atoms---- Molecule
are the smallest possible particles of an element---- an Atom
are pure substances made of two or more atoms of different elements---- Compound
An atom is the smallest unit of matter that consists of protons, neutrons and electrons. Eg the element, helium, contains atoms with two protons in the nucleus.
Eg of element, we have carbon, hydrogen, helium
Eg of a compound--- Ammonia
Eg of a molecule-----H2O (water),C6H12O6 (glucose)
