The Answer is C. The outer shell electrons are the electrons which are involved with chemical reactions and bonding. All elements in the same group have different number of total electrons but ALL have the same number of outer shell electrons. This is why they exhibit similar chemical properties.
Spongy or the cancellous bone is the bone with lattice work structure
Kinetic energy is calculated by using formula:
Ek = 1/2*m*v^2
Now we replace values of mass and speed in this formula.
Ek = 1/2*10*3^2 = 45.0J
When you have a formula and all variable values are given in the text of question just replace variable values in equation and find the final value.
Answer:
option (d) 7.1 kN
Explanation:
Given:
Mass of the car, m = 1600 kg
Acceleration of the car, a = 1.5 m/s²
Coefficient of kinetic friction = 0.3
let the tension be 'T'
Now,
ma = T - f .................(1)
where f is the frictional force
also,
f = 0.3 × mg
where g is the acceleration due to the gravity
thus,
f = 0.3 × 1600 × 9.81 =
therefore,
equation 1 becomes
1600 × 1.5 = T - 4708.8
or
T = 2400 + 4708.8
or
T = 7108.8 N
or
T = 7.108 kN
Hence,
The correct answer is option (d) 7.1 kN
Answer:
The answer to your question is F = 16 N
Explanation:
Data
mass = 8 g
vo = 800 m/s
distance = 20 cm
force = ?
vf = 0 m/s
Process
1.- Calculate the acceleration of the bullet
Formula
a = (vf² - vo²)/2d
Substitution
a = (0 - 800)/2(0.2)
a = -800/0.4
a = 2000 m/s²
2.- Convert 8g to kg
1000 g --------------- 1 kg
8 g -------------- x
x = (8 x 1)/1000
x = 0.008 kg
3.- Calculate the force
Formula
F = ma
Substitution
F = (0.008)(2000)
Simplification and result
F = 16 N
