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Elenna [48]
3 years ago
6

Electromagnets can be used to lock doors. How could an engineer increase the strength of an electromagnetic lock? Check all that

apply
A. by increasing the current through the wire

B. by reversing the current through the electromagnet

C. by adding more coils to the electromagnet

D. by increasing the space between the coils in the electromagnet
Physics
1 answer:
ddd [48]3 years ago
3 0

The answer should be A

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Environment A is warm and gets lots of rain. Environment B is warmer and gets more rain year round. Identify Environment A.(2 po
zlopas [31]
The Swamp
There are many websites that say the rainforest but the rainforest is warmer and gets rain year round and swamps are warm and gets lots of rain but not year round.
5 0
2 years ago
What is the acceleration of the box?
worty [1.4K]

Answer:

a=4,32m/s^2

Explanation:

Fnet = F1 - F2

= 12-1.2

= 10.8N

m=2.5kg

Fnet =ma

10.8=2.5a then divide both sides by 2.5 to get acceleration

8 0
2 years ago
In severe head-on automobile accidents, a deceleration of 60 g’s or more (1 g 5 32.2 ft/s2) often results in a fatality. What fo
Musya8 [376]

Answer:

The resulting force on the child is 3000 lbf

Explanation:

To find the force that acts on a child of 50 lb with a deceleration of 60 g's, we can use the formula:

Force = mass * acceleration

To find the force in lbf, we need to use the mass in lb and the acceleration in g (standard unit of gravity).

So we have that:

Force = 50 * 60

Force = 3000 lbf

So the resulting force on the child is 3000 lbf.

3 0
2 years ago
The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries to 360 V , which charges a capacitor
aksik [14]

Answer:

The capacitance of the capacitor is 1.85*10^{-5}F

Explanation:

To solve this exercise it is necessary to apply the concepts related to Power and energy stored in a capacitor.

By definition we know that power is represented as

P = \frac{E}{t}

Where,

E= Energy

t = time

Solving to find the Energy we have,

E = P*t

Our values are:

P = 1*10^5W

t = 12*10^{-6}s

Then,

E= (1*10^5)(12*10^{-6})

E = 1.2J

With the energy found we can know calculate the Capacitance in a capacitor through the energy for capacitor equation, that is

E=\frac{1}{2}CV^2

Solving for C=

C = \frac{1}{2}\frac{E}{V^2}

C = 2\frac{1.2}{(360^2-3^2)}

C = 1.85*10^{-5}F

Therefore the capacitance of the capacitor is 1.85*10^{-5}F

7 0
2 years ago
A student walks 10meters east down a hallway before realizing she has dropped a book. She turns around and walks 3meters west to
irina1246 [14]
10 – 3 + 8 = 15 meters

10 + 3 + 8 = 21 meters

Her total traveled is 21 meters, displacement is 15 meters.
5 0
3 years ago
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