You are performing an experiment that requires the highest- possible magnetic energy density in the interior of a very long currentcarryingsolenoid. Which of the following adjustments increases the energy density? (More than one choice may be correct.) (a) increasing the number of turns per unit length on the solenoid (b) increasing the cross-sectional area ofthe solenoid (c) increasing only the length of the solenoid while keeping thenumber of turns per unit length fixed (d) increasing the current in the solenoid

Q: Rail guns have been suggested for launching projectiles into space without chemical rockets. A table...

A:

Q: 47.) When either the listener moves closer to the source or the source of sound moves towards the li...

A: Doppler effect: When listener is moving and source is also moving either in same or opposite directi...

Q: Earth can be considered as a spherical capacitor with two plates, where the negative plate is the su...

A:

Q: Two containers of equal volume each hold samples of the same ideal gas. Container A has twice as man...

A:

Q: How much work is needed for a 73-kg runner to accelerate fromrest to 7.7 m>s?

A:

Q: At an amusement park, a 98.5-kg bumper car moving with a speed of 1.18 m>s bounceselastically off...

A:

Q: What is the angular displacement?

A:  

Q: Consider the apparatus shown: a conducting bar is moved along two rails connected to an incandescent...

A: a) The expression for the emf developed in the system is,

Q: A pilot of mass m= 70 kg in a jet aircraft executes a loop-the-loop, as shown in Figure. In this man...

A:

Q: Although an incandescent lightbulbappears to shine with constant intensity, this is an artifact of t...

A:

Q: As an airplane taxies on the runway with a speed of 16.5 m>s,a flight attendant walks toward the ...

A: The velocity of the flight attendant relative to the ground will be the sum of the velocity of the f...

Q: A block with mass of m1 = 2 kg is placed on top of a block with a mass m2 = 4 kg. A horizontal force...

A: Given data The mass of the upper block is: m1 = 2 kg The mass of the lower block is: m2 = 4 kg The h...

Q: With the switch in the circuit of 27.4a closed, there is no current in R2 because the current has an...

A:

Q: A cyclist riding in a straight line has an initial velocity of 3.5 m>s, and accelerates at -1.0 m...

A: The relation between initial velocity u, final velocity v, and acceleration a is; v=u+at

Q: A 0.03 kg lead bullet traveling 112 m/s strikes an armor plate and comes to stop. If all of the bull...

A: The expression for the kinetic energy is,

Q: 48.) If 100 wavelengths pass by any given point in one second, what does it tell you about that wave...

A: Wavelength is nothing but a distance. The distance between two successive crest is known as waveleng...

Q: Explain How to use the relationship between total work and change in kinetic energy when the forces ...

A: We know, the work-energy theorem when a constant force acts:    

Q: A car travels 20.0 km due north and then 35.0 km in a direction 60.0° west of north as shown in 3.11...

A:

Q: Your physical education teacher throws a baseball to you at a certain speed and you catch it. The te...

A: The ball whose velocity is maximum will be hardest to catch.  

Q: Water ripples are produced by making a cork oscillate up and down at a frequency of 4Hz. The peaks o...

A:

Q: 39.) A sound wave's frequency is most related to that sound's a. pitch b. amplitude c. energy

A: The pitch of the sound is indicated by the frequency of the sound wave.  

Q: A model rocket rises with constant acceleration to a height of4.2 m, at which point its speed is 26....

A:

Q: A pendulum with a length of 1.00 m is released from an initial angle of 17.0°. After 1 000 s, its am...

A: Given Data: The length of a pendulum is, l=1 m The initial angle is, θi=17.0o The final angle is, θf...

Q: Two strings both vibrate at exactly 848 Hz. The tension in one of them is then decreased  slightly. ...

A: Two strings both vibrate at exactly 848 Hz. when both strings vibrate, 7 beats per second are heared...

Q: (I) A stone is dropped from the top of a cliff. It is seen to hit the ground below after 3.55 s. How...

A:

Q: I am providing the data from number 16 to solve for number 17.

A: Power of the laser, Diameter of the cross section, Area of the cross section is therefore,

Q: A watch manufacturer claims that its watches gain or lose no more than 8 seconds in a year. How accu...

A: Number of seconds in a year is,

Q: A ball of lead of mass 1kg drops from a height of 42 m, hits the floor and remains there at rest. Wh...

A: Given: Mass of ball (m) = 1 kg. Height of object (h) = 42 m. Specific heat capacity of lead (C) = 13...

Q: A table-tennis ball is thrown at a stationary bowling ball. The table-tennis ball makes a one-dimens...

A: Suppose, Initial speed of the tennis ball = u1 Initial speed of the bowling ball, u2 = 0 Mass of the...

Q: Hannah tests her new sports car by racing with Sam, an experienced racer. Both start from rest, but ...

A:

Q: • A child goes down a playground slide that is inclined at an angleof 26.5° below the horizontal. Fi...

A:

Q: Problems 9 & 10 refer to the 60 cm string, driven by a variable motor, portrayed in the figure on th...

A: L = 60 cm = O.6 m f = 45 Hz

Q: Consider an electron orbiting a proton and maintained in a fixed circular path of radius R = 5.29 x ...

A:

Q: In the upper atmosphere at altitudes where commercial airlines travel, we find extremely cold temper...

A:

Q: What are the SI base units of length, mass, and time?

A: There are seven SI base units for the seven base quantities. These are considered to be mutually ind...

Q: A gas is compressed inside a cylinder. An average force of 10 N acts to move the piston 2.6 m. Durin...

A: The formula for work when force F acts and displacement is s then; Given: Q=-12 J (Negative sign is...

Q: Consider the magnetic field due to the current in the wire shown. Rank the points A, B, and C in ter...

A:

Q: A state highway patrol car radar unit uses a frequency of8.00 * 109Hz. What frequency difference wil...

A:

Q: Light passes from air into flint glass at a nonzero angle of incidence. (a) Is it possible for the c...

A: a. the diagram for the given case is shown below.

Q: (a) Find the radius of the n = 4 Bohr orbit of adoubly ionized lithium atom 1Li2+, Z = 32. (b) Is th...

A: (a) If rn denotes the nth Bohr-orbit’s radius of a hydrogen-like atom with a single electron and the...

Q: Currents of approximately 0.06 A can be potentially fatal. Currents in that range can make the heart...

A:

Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.