ANSWER
EXPLANATION
Since the body is in equilibrium, total upward forces must equal total downward force.
Also the net horizontal forces acting on the body must be zero.
We need to resolve 
into vertical and horizontal components.
The horizontal component is
.
The vertical component is
.
Equating the up force to the downward forces gives,
.
This implies that,
.
Also the horizontal forces must be equal.
.
Dividing equation (1) by equation (2) gives,
.
.
Therefore the given angle that must make with the horizontal is approximately 35° to the nearest degree.
Answer:
29.4 N/m
0.1
Explanation:
a) From the restoring Force we know that :
F_r = —k*x
the gravitational force :
F_g=mg
Where:
F_r is the restoring force .
F_g is the gravitational force
g is the acceleration of gravity
k is the constant force
xi , x2 are the displacement made by the two masses.
Givens:
<em>m1 = 1.29 kg</em>
<em>m2 = 0.3 kg </em>
<em>x1 = -0.75 m </em>
<em>x2 = -0.2 m </em>
<em>g = 9.8 m/s^2 </em>
Plugging known information to get :
F_r =F_g
-k*x1 + k*x2=m1*g-m2*g
k=29.4 N/m
b) To get the unloaded length 1:
l=x1-(F_1/k)
Givens:
m1 = 1.95kg , x1 = —0.75m
Plugging known infromation to get :
l= x1 — (F_1/k)
= 0.1
Answer is lead, lead will heat up the fastest as it has the highest specific heat amongst the choices. The higher the specific heat of the substance the easier it is for that substance temperature to change for every mole of substance with respect to a degree in kelvin.
The first part of the question is 3,100 V.
The second part of the question is 200 V.
Given: Energy E = 5.53 X 10⁻¹⁷ J; Velocity of light c = 2.998 x 10⁸ m/s
Planck's constant h = 6.63 x 10⁻³⁴ J.s
Required: Frequency f = ?
Formula: E = hc/λ and Frequency f = V/λ
λ = (6.63 x 10⁻³⁴ J.s)(2.998 X 10⁸ m/s)/(5.53 x 10⁻¹⁷ J)
λ = 3.59 X 10⁻⁹ m
For Frequency f = ?
f = c/λ
f = 2.998 x 10⁸ m/s/3.59 x 10⁻⁹m
f = 8.35 x 10¹⁶ Hz
