A 4.8-kg rock displaces 1.0 L of water when fully submerged. The density of the rock is... A. 4.8 kg per cubic meter. B. 48 kg per cubic meter. C. 480 kg per cubic meter. D. 4800 kg per cubic meter.

The answer to your question is letter D. 4800 kg/m³

Explanation:

Data

mass of the rock = 4.8 kg

volume of water = 1.0 L

density = ?

Process

1.- Convert the volume to cubic meters

              1 m³   1000 L

               x                1 L

               x = (1 x 1) / 1000

               x = 0.001 m³

2.- Calculate the density

Formula

density = mass / volume

substitution

density = 4.8 kg / 0.001 m³

simplification

density = 4800 kg/m³

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: