Explain some of the things that you like to do, but could not if you did not have any thumbs.
1 answer:
You might be interested in
The velocity, expressed in terms of ME, RE is given as .
The maximum height that the rocket could reach if launched vertically is H = (¹/₂v₀²)/g.
<h3>Maximum height of the rocket</h3>The maximum height reached by the rocket can be modeled using conservation of energy as shown below;
P.Ei + K.Ei = K.Ef + P.Ef
P.E = K.E
mgH = ¹/₂mv²
H = (¹/₂v₀²)/g
Learn more about conservation of energy here: brainly.com/question/166559
Answer:
1.312 x 10⁻¹² J/nucleon
Explanation:
mass of ¹³⁶Ba = 135.905 amu
¹³⁶Ba contain 56 proton and 80 neutron
mass of proton = 1.00728 amu
mass of neutron = 1.00867 amu
mass of ¹³⁶Ba = 56 x 1.00728 amu + 80 x 1.00867 amu
= 137.10128 amu
mass defect = 137.10128 - 135.905
= 1.19628 amu
mass defect = 1.19628 x 1.66 x 10⁻²⁷ Kg
= 1.9858 x 10⁻²⁷ Kg
speed of light = 3 x 10⁸ m/s
binding energy,
E = mass defect x c²
E = 1.9858 x 10⁻²⁷ x (3 x 10⁸)²
E = 17.87 x 10⁻¹¹ J/atom
now,
binding energy per nucleon =
= 0.1312 x 10⁻¹¹ J/nucleon
= 1.312 x 10⁻¹² J/nucleon
1) Mechanical energy is conserved in all the 4 situations
2) True
3) The potential energy of the block is 490 J
Explanation:
1)
Mechanical energy is the sum of potential energy (PE) and kinetic energy (KE) of a body:
According to the law of conservation of energy, in absence of non-conservative forces (such as air resistance, friction...), the mechanical energy of a body is always conserved.
This means that the mechanical energy is conserved in all the situations described. More specifically:
- Child on a swing : there is a continuous conversion between kinetic energy and gravitational potential energy
- Pendulum : there is a continuous conversion between kinetic energy and gravitational potential energy
Bow and Arrow : there is a conversion of energy from elastic potential (when the bow is stretched) to kinetic energy (when the arrow is shot)
Roller Coaster: there is a continuous conversion between kinetic energy and gravitational potential energy
2)
As we said, the mechanical energy of the object falling down at any point of the fall is
where KE is the kinetic energy and PE is the potential energy. The value of E is constant, since the mechanical energy is conserved.
The potential energy is given by
where m is the mass of the object, g is the acceleration of gravity, h is the height of the object above the ground.
As the object falls, its height decreases, and therefore, the potential energy PE also decreases. But we said that E must remain constant: therefore, if PE decreases, this means that KE increases, therefore as the object falls, the potential energy is converted into kinetic energy (in fact, the speed of the object increases). So the statement is true.
3)
The potential energy of an object is given by the equation
where
m is the mass of the object
is the acceleration of gravity
h is the height of the object relative to the ground
For the block in this problem, we have:
m = 10 kg
h = 5 m
Substituting, we find its potential energy:
Learn more about potential energy and kinetic energy:
#LearnwithBrainly