Other Problem Solutions: Expert Help and Step-by-Step Explanation

The current-density magnitude in a certain circular wire isJ = (2.90 1010A/m4)r^{2}, where r is theradial distance out to the wire's radius of 3.00 mm. The potential applied to the wire (end toend) is 60.0 V. How much energy is converted to thermal energy in1.60 h?

Match the function with its graph (labeled I-VI). Givereasons
a) ${\displaystyle f(x,y)=\left|x\right|+\left|y\right|}$
b) ${\displaystyle f(x,y)=\left|xy\right|}$
c) ${\displaystyle f(x,y)=1÷1+x^2+y^2}$
d) ${\displaystyle f(x,y)={(x^2-y^2)}^2}$
e) ${\displaystyle f(x,y)={(x-y)}^2}$
f) ${\displaystyle f(x,y)=\sin (\left|x\right|+\left|y\right|)}$

a) Which of the following is the electron configuration forthe ${\displaystyle A{1}^3}$+ ion?
b) Which element has this electron configuration?
A. ${\displaystyle 1s^{22}{s}^{22}p63s^2}$
B.${\displaystyle 1s^{22}{s}^{22}p63s^{23}{p}^2}$
C.${\displaystyle 1s^{22}{s}^{22}p63s^{23}{p}^1}$
D.${\displaystyle 1s^{22}{s}^{22}p6}$
E. ${\displaystyle 1s^{22}{s}^{22}p63s^{23}p4}$

Two objects are identical and small enough that their sizes canbe ignored relative to the distance between them, which is 0.200 m.In a vacuum, each object carries a different charge, and they attract each other with a F of 1.20 N. The objects are brought into contact, so the net is shared equally, and they are returned to their initial positions. Now it is found that the object repel one another with a force whose magnitude is equal to that of the initial attractive force. What is the initial charge on each object?

Express the radical as power.
${\displaystyle \left(a\right)\sqrt[6]{x^5}}$
To simplify:
The expression ${\displaystyle \sqrt[6]{x^5}}$ and express the answer using rational exponents.
(b) ${\displaystyle {\left(\sqrt{x}\right)}^9}$
To simplify:
The expression ${\displaystyle {\left(\sqrt{x}\right)}^9}$ and express the answer using rational exponents.

A person weighing 490 N stands on a scale in an elevator. The elevator is moving upward with an acceleration of ${\displaystyle 3\frac{m}{s^2}}$. The reading on the scale is the answer is 250 N. But i ended up with 340 N?

Interference of Rectangular Pulses: Two rectangular wave pulses are on a stretched string traveling toward each other. Each pulse is traveling with a speed of 1.00 mm/s. If the leading edges of the pulses are 8.00 mm apart at t=0 s, sketch the shape of the string at t = 4 s, t = 6 s, and t = 10 s. A diagram comes with this problem. It looks like a string starting horizontal and turning upwards at a right angle (height 3 mm) then it turns right at a 90 degree angle with length 4 mm. Next, the string turns down for another 3 mm and then goes back to horizontal with length 8 mm. Then, it turns down for a drop of 4 mm turning back right to horizontal for 4 mm, turns upward for a height of 4 mm and then goes back to a horizontal, in line with the first.

A gun is fired vertically into a 1.40 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 210 m/s, how high will the block rise into the air after the bullet becomes embedded in it?

[HRW7 9.P.020.] Figure 9-47 gives an overhead view of the path taken by a 0.165 kg cue ball as it bounces from the rail of a pool table. The ball's initial speed is 2.50 m/s, and the angle 1 = 30.0°. The bounce reverses the y component of the ball's velocity but does not alter the x component. Fig. 9-47 (a) What is 2? ° (b) What is the change in the ball's linear momentum in unit-vector notation? (The fact that the ball rolls is irrelevant to the question.) i kgm/s + j kgm/s

Suppose our Sun eventually collapses into a white dwarf, losing about half its mass in the process, and winding up with a radius 1.0% of its existing radius. Assuming the lost mass carries away no angular momentum, what would the Sun's new rotation rate be? (Take the Sun's current period to be about 30 days.) What would be its final KE in terms of its initial KE of today?

The concentrated sulfuric acid we use in the laboratory is 98% ${\displaystyle H_{2}S{O}_4}$ by mass. Calculate the molality and molarity of the acid solution. The density of the solution is 1.83 ${\displaystyle \frac{g}{mL}}$ answers are ${\displaystyle 5\times {10}^{-2}}$ m, 18.3M

A horizontal force of 210N is exerted on a 2.0 kg discus as it rotates uniformaly in a horizontal circle ( at arm's length ) of radius .90 m. Calculate the speed of the discus

A parachutist relies on air resistance mainly on her parachute to decrease her downward velocity. She and her parachutehave a mass of 55.0 kg and air resistance exerts a total upward force of 620 N on her and her parachute.
a) What is the weight of the parachutist?
b) Draw a free body diagram for the parachutist. Use that diagram to calculate the net force on the parachutist. Is the net force upward or downward?
c) what is the acceleration (magnitude and direction) of the parachutist?

Two Packing crates of masses 10.0 kg and 5.00kg are connected by alight string that passes over a frictionless pulley as in Figure. The 5.00-kg crate lies on a smooth incline of angle 40.0 degrees. Find the acceleration of the 5.00-kg crate and the tension in the string.

A rectangular loop consists of 100 closely wrapped turns and has dimensions 0.40m by 0.30 m. The loop is hinged along the y-axis, and theplane of the coil makes an angle of ${\displaystyle {30.0}^{\circ }}$ with thex-axis (Figure). What is the magnitude of the torque exerted on the loop by a uniform magnetic field of 0.80 T directed along the x axis, when the current in the windings has a value of 1.2 A in the direction shown?

As part of your work out, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when u push the platform, you compress the springs. You do 80.0G of work when u compress the springs 0.200m from their uncompressed length.
a) What magnitude of force must u apply to hold the platform in this position?
b) How much additional work must you do to move the platform 0.200m farther, and what maximum force must you apply?

A cylinderical wire has a resistance of 21.0 ohm. It ismelted down, and from the same volume of metal a new cylindricalwire is made that is three times longer than the originalwire. What is the resistance of the new wire?I know that the answer is Rnew = 60 ohms, I just don't whatsteps to partake in to reach this solution, any help would be muchappreciated!

Find the inverse Laplace transform $f\left(t\right)=L^{-1}\left\{F\left(s\right)\right\}$ of each of the following functions.
$\left(i\right)F\left(s\right)=\frac{2s+1}{s^2-2s+1}$
Hint – Use Partial Fraction Decomposition and the Table of Laplace Transforms.
$\left(ii\right)F\left(s\right)=\frac{3s+2}{s^2-3s+2}$
Hint – Use Partial Fraction Decomposition and the Table of Laplace Transforms.
$\left(iii\right)F\left(s\right)=\frac{3s^2+4}{(s^2+1)(s-1)}$
Hint – Use Partial Fraction Decomposition and the Table of Laplace Transforms.

Which two electron configurations represent elements thatwould have similar chemical properties?
1. 1s²2s²2p4
2.1s²2s²2p5
3.(Ar)4s²3d104p³
4.(Ar)4s²3d104p4
A. 1,2
B.1,3
C1,4
D.2,4
E.2,3

$y_1^{\prime }=-3y_1+y_2+u(t-1)e^t,y_2^{\prime }=-4y_1+2y_2+u(t-1)e^t,y_1(0)=0,y_2(0)=21$
Enclose arguments of functions, numerators, and denominators in parentheses.