The magnetic field inside a solenoid can be found exactly using ampère's law only if the solenoid is infinitely long. otherwise, the biot-savart law must be used to find an exact answer. in practice, the field can be determined with very little error by using ampère's law, as long as certain conditions hold that make the field similar to that in an infinitely long solenoid.

which of the following conditions must hold to allow you to use ampère's law to find a good approximation?

(a) consider only locations where the distance from the ends is many times d.
(b) consider any location inside the solenoid, as long as l is much larger than d for the solenoid.
(c) consider only locations along the axis of the solenoid.

Trumpeter a holds a b-flat note on the trumpet for a long time. person c is running towards the trumpeter at a constant velocity. person b is running away from the trumpeter at the same rate. person d is standing still the whole time. which person hears a frequency that is lower than the b-flat?

Will give brainliest! jay rides his 2.0-kg skateboard. he is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. the board now goes forward at 13 m/s.a. determine jay’s mass.b. determine the change in the internal energy of the system during this process.(express your answer to two significant figures and include the appropriate units.)

Antireflective coatings on solar cells are often made by applying a thin film of silicon nitride (sinx), which has an index of refractive of 1.2, on the top of the silicon solar cell, which has a refractive index of about 3.5. however, the sun emits radiation of various wavelengths which the solar cell absorbs, and the antireflective coating can only absolutely minimize the reflection of one of these wavelengths. the coating thickness is chosen to reduce the reflection of green/yellow light (e = 2.2 ev), which is the most intense color in the solar spectrum (shown below). which of the following coatings would minimize reflection of green/yellow light? the answer is 820 nm how? what is the angular width of the central maximum of an electron traveling at 2 x 108 m/s going through a single slit of width 1 mm.