A block of mass 10.0 kg sits at rest on a ramp. The ramp makes a 30.0° angle with the horizontal. The coefficients of static and
kinetic friction between the ramp and the block are 0.700 and
0.200, respectively. The magnitude of the friction force the ramp
exerts on the block is
59.4 N
O 17.0N
84.9 N
49.0 N

d

explanation:

v=uf/(u-f)

= 5.10/(5-10) convex lens has positive focal length

=50/-5

=-10 cm (formed at other side)

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

it has to be b, about 97 percent.