A: The charge of a proton is positive, a neutron is neutral and an electron is negative. The protons and neutrons are found in the nucules while the electrons orbit the nucules in their given energy levels.
Answer:
breaking apart of atoms of certain elements to release rays of energy or particles.
Atoms are the building blocks of elements. However, some atoms have an excessive number of neutrons or protons in their nuclei. This causes an imbalance in the forces that keep them together, resulting in an excessive amount of internal energy. These atoms are referred to as radioactive or unstable.
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Answer:
9.14hrs
Explanation:
1 horse power = 745.7 watts
1.5 horse power = 1118.55 watts
1 ft = 0.305 m
24 ft = 7.3152 m
60 ft = 18.288 m
the water tank is spherical, volume of a spherical tank = 3/4 πr³ where is r is the radius of the tank = 7.3152 m / 2 = 3.66 m
volume = 4/3 ( 3.66 m ³) × 3.142 = 205.394 m³
mass of water = density × volume = 205.394 m³ × 1000kg/m³ = 205,394 kg
weight of water = mass × acceleration due to gravity = 205,394 kg × 9.8 = 2012861.2 N
potential energy stored at the height where water was stored = mgh = weight × height = 2012861.2 N × 18.288 m
potential energy stored = energy from the pump = power in watt × t
1118.55 watts × t =2012861.2 N × 18.288 m
t = (2012861.2 N × 18.288 m) / 1118.55 watts = 32846.62 secs = 9.14 hrs
Answer:
a) γ =0.055556
b) t = 0.4 MPa
Explanation:
Given:
- The dimensions of rubber block : 18 x 21 x 25
- A load was applied at upper frame P = 420 N
- The rubber deflects dx = 1 mm downwards
Find:
(a) average shear strain in the rubber mounts
(b) average shear stress in the rubber mounts.
Solution:
- For average shear strain we have the definition:
γ = dx / y
Where,
γ: The shear strain.
dx : Deflection along the shear force
y : The length perpendicular to deflection.
- From given data we have dx = 1mm, and the dimension of block perpendicular to deflection is the a dimension. Hence, dx = 0.001 and y =0.018 m:
γ = 0.001 / 0.018 = 0.055556
- The average shear stress along the mating flat surface. We have from definition:
t = F_shear / Area
- Where, F_shear: The shear force on each rubber block is P/2.
Hence,
t = (P/2) / b*c
Plug values in:
t = (420/2) / (0.021*0.025)
t = 0.4 MPa
Answer:
The speed is ![v = 3.946 *10^6 \ m/s](https://tex.z-dn.net/?f=v%20%3D%203.946%20%2A10%5E6%20%5C%20m%2Fs)
Explanation:
From the question we are told that
The magnetic field is ![B = 0.669\ T](https://tex.z-dn.net/?f=B%20%3D%20%200.669%5C%20T)
The electric field is ![E = 2.64 *10^{6} \ V/m](https://tex.z-dn.net/?f=E%20%3D%202.64%20%2A10%5E%7B6%7D%20%5C%20V%2Fm)
Generally the speed of the electron is mathematically represented as
![v = \frac{E}{B}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7BE%7D%7BB%7D)
Substituting values
![v = \frac{2.64 *10^6}{0.669}](https://tex.z-dn.net/?f=v%20%3D%20%5Cfrac%7B2.64%20%2A10%5E6%7D%7B0.669%7D)
![v = 3.946 *10^6 \ m/s](https://tex.z-dn.net/?f=v%20%3D%203.946%20%2A10%5E6%20%5C%20m%2Fs)