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11111nata11111 [884]

3 years ago

15

A coffee machine transfers 12 kj of energy in 15 seconds. It uses 230 v mains supply. Use this information to work out the curre

nt through the coffee machine

1 answer:

Otrada [13]3 years ago

6 0

Answer:

3.5 A

Explanation:

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There is a pulley arrangement with a worker standing on a raised platform. The worker is standing on a platform 4 m above the fl

vova2212 [387]

Answer:

I am kind of confused-

Explanation:

Do you mind re-writing and explaining the question more?

7 0

3 years ago

Which statement best describes the atoms of elements that form compounds by covalent bonding?

k0ka [10]

Answer:

they share electrons between them.

Explanation:

taking the test rn lol i think its right

4 0

3 years ago

5.34 x 10^20 electrons pass a point in a circuit in 2.5 seconds. What is the current at that point?

Makovka662 [10]

34.176 A, all working shown in photo

5 0

4 years ago

A spaceship traveling to Alpha Centauri at 0.75c sends a message home to Earth saying they are at the halfway point.

Lina20 [59]

Answer:

(a) 24.87 GHz (b) 3.55 GHz

Explanation:

We have given the speed of the spaceship =0.75 c, here c is the speed of the light

(a) In the first case the ship is moving towards the alpha century

So the frequency is given by $f'=f\times \sqrt{\frac{c+0.75c}{c-0.75c}}=9.4\times \sqrt{\frac{c+0.75c}{c-0.75c}}=24.87GHz$

(b) In this case the ship is moving away from the alpha century

So frequency is given by $f'=f\times \sqrt{\frac{c-0.75c}{c+0.75c}}=9.4\times \sqrt{\frac{c-0.75c}{c+0.75c}}=3.55GHz$

5 0

3 years ago

In a rectangular coordinate system a positive point charge q=6.00⋅ 10 −9 C is placed at the point x = +0.150 m , y = 0, and an i

masya89 [10]

I'm guessing that the question is how much force is pulling the two charges together. I'll use Coulomb's law where Force = k*Q1*Q2/r^2, where k is Coulomb's Constant= 8.99*10^9. First, r = distance between points = sqrt((0.150+0.15)^2+0^2) = 0.3 Entering this info into the equation = (8.99*10^9)*(6*10^-9)*(6*10^-9)/(0.3)^2 = 3.60*10^-6 Newtons away from each other They repel since both are positive).

3 0

4 years ago