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4 years ago

Increasing the amount of current that flows through a wire ______ the strength of an electromagnet

Physics

2 answers:

Anestetic [448]4 years ago

7 0

Electromagnet is in form of solenoid

and the magnetic field due to solenoid is given as

$B = \mu_0 n i$

here

i = current in the loop

so when we increase the current in electromagnet the magnetic field of the solenoid will increase

this will increase the strength of the electromagnet

so the answer would be

INCREASE

Veronika [31]4 years ago

3 0

Answer:

Increases...............................

Explanation:

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The USC Trojan football team bus is heading to an away game, traveling on a long, straight road at a constant speed of 28.0 m/s.

Ugo [173]

Answer:

a. 17.34 s. b. 104.51 m c. -7.16 m/s²

Explanation:

a. The distance, d moved by the car at constant speed v = 6.00 m/s in time t which they collide is d = vt. The distance d' moved by the bus from its initial position 70 m away from the car with a constant velocity u = 28.0 m/s and deceleration a = -3.00 m/s² is d' = 70 + ut + 1/2at².

At collision, s = d

vt = 70 + ut + 1/2at²

substituting the values of the variables, we have

6t = 70 + 28t + 1/2(-3)t²

6t = 70 + 28t - 1.5t²

collecting like terms, we have

1.5t² + 6t - 28t - 70 = 0

1.5t² - 22t - 70 = 0

using the quadratic formula to find t, we have

$t = \frac{-(-22) +/- \sqrt{(-22)^{2} - 4 X -70 X 1.5} }{2 X 1.5} \\t = \frac{22 +/- \sqrt{484 + 420} }{3} \\\\t = \frac{22 +/- \sqrt{904} }{3} \\\\t = \frac{22 +/- 30.01 }{3} \\\\t = \frac{22 - 30.01 }{3} or \frac{22 + 30.01 }{3} \\t = \frac{-8.01 }{3} or \frac{52.01 }{3} \\\\t = -2.67 s or 17.34 s$

We take the positive value.

So t = 17.34 s.

So, 17.34 s elapses before the bus and car collide.

b. Since the distance covered by the bus is d' = 70 + ut + 1/2at², this is how far down the road the collision occurs.

Substituting the values of the variables, we have

d' = 70 + 28 m/s × 17.34 s + 1/2(-3 m/s²)(17.34)²

d' = 70 + 485.52 - 451.01

d'= 104.51 m

c. To just avoid the collision, the bus must decelerate in the distance of 104.51 m from the car to the speed of the car. So using

v² = u² + 2ad' where v = 6.00 m/s, u = 28.0 m/s and d' = 104.51 m

the acceleration is thus

a = (v² - u²)/d'

a = ((6 m/s)² - (28 m/s)²)/104.51 m

a = (36 m²/s² - 784 m²/s²)/104.51 m

a = -748 m²/s² ÷ 104.51 m

a = -7.16 m/s²

3 0

3 years ago

Jim is performing a magic show where he has to lie on the plank fixed with 1000 nails. He weighs 650N. Each nail has an area of

DanielleElmas [232]

a) They will not pierce his skin

First you need to find the average force on each needle, which can be found by dividing the total force (650) by the number of nails (1000). This gets you can average force of 650/1000, or .65 N. To find pascals, you divide the force in newtons by the area in square meters, so you get .65/.000001, which is 650000. You can divide that by 1000 to convert it from pascals to kPa, which gets you 650 kPa, which is less than the 700kPa needed to pierce the skin.

b) They would pierce the skin in this case.

Here, the average force would be 650/800, which is .8125. With the same .000001 m^2 surface area, you'd get .8125/.000001 pascals, which is 812500 pascals. Divide this by 1000 to convert to kPa and you get 812.5, which is higher than 700, so it can pierce the skin.

3 0

4 years ago

The ____________ is a multi-faceted role that helps users determine what outputs they want from the system and help construct pl

kobusy [5.1K]

Answer:

The answer is "system analyst."

Explanation:

A "system analyst" is a role in which a person helps an organization or another person fulfill his or her needs when it comes to the system. It is, therefore, his job to analyze the system, including its design and implementation. This makes his role "multi-faceted," meaning he assumes several aspects in relation to his job and he needs to be versatile in it.

In order for a person to become a skillful system analyst, he must consider sharpening his skills in relation to critical thinking, problem-solving, management strategies and capacity to work under pressure.

6 0

3 years ago

Point charge q1 and q2 both of 22nC are separated by a distance of 58cm along horizontal axis point a is located 40cm from q1 an

kvasek [131]

Answer:

E = 4.01×10^6 N/C

direction is toward q2

Explanation:

q1 = q2 = 12micro-C = 12×10^-6C

r1 = 18cm = 0.18m

r2 = 40cm = 0.40m

k = 9×10^9

E1 = kq1/(r1)²

E1 = 3.33×10^6 N/C

E2 = kq2/(r2)²

E2 = 6.75×10^5 N/C

Enet = E1 + E2

= 3.33×10^6 + 6.75×10^5

= 4.01×10^6 N/C

direction is toward q2

6 0

3 years ago

3. A 64 lb weight stretches a spring 4 ft in equilibrium. The weight is initially displaced 6 inches above equilibrium and given

Damm [24]

Answer:

Explanation:

the solution is given in the attached pictures

6 0

3 years ago