Answer: The magnetic field is 4×10^-4T
Explanation:
Using the magnetic field equation
B=μI/2πr
B= magnetic field =?
l= current in the wire=2.0A
r= distance from the axis of wire=1.0mm= 0.001m
μ=magnetic permeability =4π×10^-7N/m
B= (4π×10^-7 × 2.0)/(2π × 0.001)
B= 4×10^-4T
Therefore the magnetic field is 4×10^-4T
The energy stored in the spring is 2.25 J.
Given that the energy stored in a spiral spring is E = 1/2 k e^2
Where;
E = energy stored in the spring
k = force constant
e = extension
We can obtain the force constant as the slope of the graph;
k = 25 - 5/0.5 - 0.1
k = 20/0.4
k = 50 N/m
Substituting into the equation when e = 0.3,
E = 1/2 × 50 × (0.30)^2
E = 2.25 J
Learn more: brainly.com/question/10991960
If the object's velocity and acceleration have <em>opposite signs</em>, then the object is slowing down.
<span>why is your formula x=? if i'm reading it right the formula is the height of the object at time t.
That being the case, set your setup (which looks right) equal to 0 and solve for t.
This will tell you how long it takes to hit the ground.
Plug this value of t into the forumla -9.8t+2.8 and that will tell you the speed at time t.</span>