Answer:
more than 51.45 N
__________________________________________________________
<u>We are given:</u>
Mass of the television = 15 kg
Coefficient of Static friction = 0.35
<u>Minimum force required to move the television:</u>
<u>Normal Force:</u>
We know that the normal force is equal and opposite to the Weight of the television
Weight of the television = Mg
[<em>where m is the mass and g is the acceleration due to gravity</em>]
Weight = 15 * 9.8
Weight = 147 N
<u>Force of Friction:</u>
We are given the coefficient of Friction = 0.35
We know that coefficient of Friction = Force of friction / Normal Force
<em>replacing the variables</em>
0.35 = Force of Friction / 147
Force of Friction = 147 * 0.35 [<em>multiplying both sides by 147</em>]
Force of Friction = 51.45 N
Since a force of 51.45 N is will be applied opposite to the direction of application of Force, the television will only move when we apply more force than 51.45 N
Responder:
12374550,527 N / m²
Explicación:
Dado que:
Número de tacos = 10
Área de cada montante = 0.01 in²
Peso total de la persona = 180 libras
Usando la relación:
Presión = Fuerza / Área
La fuerza ejercida es el producto de la masa y la aceleración debido a la gravedad.
Masa = 180 libras = 81,47 kg
Aceleración por gravedad = 9,8 m / s²
Área total = (número de montantes * Área por montante) = (10 * 0.01) = 0.1 pulg²
Conversión a m²:
0,1 pulg² = 6,452 * 10 ^ -5 m²
Por lo tanto,
Presión = (81,47 * 9,8) / (6,452 * 10 ^ -5)
Presión = 798.406 / 0.00006452
Presión = 12374550.527 N / m²
Explanation:
a) Three types of chemical bondings:
- Ionic bonding: Complete transfer of electrons from an electropositive atom to an electronegative atom.
- Covalent bonding: Equal sharing of electrons between the atoms with less or zero electronegativity difference.
- Metallic bonding: The bonding between the conduction electrons(electron cloud of delocalised electrons) and positively charged metal ions
b) Those elements are named as Noble gases which inert in nature that is less reactive due to fully filled electronic configuration.
Their general electronic configuration is given by:
n = principle quantum number
c) In an ionic bonding, electrons are transferred to the electronegative atom from the electropositive atom.
Electronegative: An atom which gains an electrons.Negative charge carrying ion is formed.
Electropositive : An atom which looses electrons.Positive charge carrying ion is formed.
d) This because the band width between the conduction band and valence band is large due to which electrons will not able to jump from valence band to conduction band.This makes the non metal poor electrical conductors.
Answer:
uk = 0.25
Explanation:
Given:-
- An object comes to stop with acceleration, a = -2.45 m/s^2
Find:-
What is the coefficient of kinetic friction between the object and the floor?
Solution:-
- Assuming the object has mass (m) that slides over a rough surface with coefficient of kinetic friction (uk). There is only Frictional force (Ff) acting in the horizontal axis on the object opposing the motion (-x direction).
- We will apply equilibrium equation on the object in vertical direction.
N - m*g = 0
N = m*g
Where, N : Contact force exerted by the surface on the floor
g : Gravitational acceleration constant = 9.81 m/s^2
- Now apply Newton's second law of motion in the horizontal ( x-direction ):
- Ff = m*a
- The frictional force is related to contact force (N) by the following expression:
Ff = uk*N
- Substitute the 1st and 3rd expressions in the 2nd equation:
uk*m*g = -m*a
uk = a / g
- Plug in the values and solve for uk:
uk = - (-2.45) / 9.81
uk = 0.25
Nuclear energy comes from the binding energy that is stored in the centre of an atom and holds it together. To release the energy, the atom has to be split into smaller atoms. This process is called fission. Answer is: false. Correct answer is nuclear energy.
