A black hole can be considered a star that has...

in order to generate electricity, nuclear powerplants take advantage of this part of the electromagnetic spectrum

antiseptic1488 [7]

Bit of an odd question. Power Plants are known to use water-powered turbines to generate electricity, but can also make use of nuclear fission.

8 0

3 years ago

. An object has a position given by ~r(t) = [3.0 m − (4.00 m/s)t]ˆı + [6.0 m − (8.00 m/s2 )t 2 ]ˆ , where all quantities are in

kupik [55]

Answer:

(c) 16 m/s²

Explanation:

The position is $r(t) = [3.0 \text{ m} - (4.00 \text{ m/s})t]\hat{i} + [6.0 \text{m} - (8.00 \text{ m/s}^2 )t^2 ]\hat{j}$ .

The velocity is the first time-derivative of r(t).

$v(t) = \dfrac{d}{dt}r(t) = -4.00\,\hat{i} -16t\,\hat{j}$

The acceleration is the first time-derivative of the velocity.

$a(t) = \dfrac{d}{dt} v(t) = -16\hat{j}$

Since a(t) does not have the variable t, it is constant. Hence, at any time,

$a = -16\hat{j}$

Its magnitude is 16 m/s².

4 0

3 years ago

A student needs to conduct a reaction that combines chemicals A and B to synthesize product AB . If we write this as a chemical

rusak2 [61]

Answer : The number of molecules of A needed to make 5000 molecules of AB will be, 5000

Explanation :

Law of conservation of mass : It states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

The given balanced chemical reaction is,

$A+B\rightarrow AB$

As per question, molecule B is an excess reagent because it had enough molecule to make 5000 molecules of AB. So, molecule A is limiting reagent.

From the balanced reaction, we conclude that

As, 1 molecule of AB produced from 1 molecule of A

So, 5000 molecule of AB produced from 5000 molecule of A

Hence, the number of molecules of A needed to make 5000 molecules of AB will be, 5000

8 0

3 years ago

Two loudspeakers emit sound waves along the x-axis. The sound has maximum intensity when the speakers are 19 cm apart. The sound

Vanyuwa [196]

Answer:

Explanation:

The former is the case of constructive interference and the later case relates to destructive interference.

For listener, path difference is the separation of loudspeaker as listener is not standing in between the speaker.

If λ be the wave length

For constructive interference

19 = n λ

For destructive interference

29 = (2n+1) λ / 2

= n λ + λ / 2

= 19 + λ / 2

10 = λ / 2

λ = 20 cm

= 0. 20 m

7 0

3 years ago

Please help me!!!!!!!!!!!

KATRIN_1 [288]

The world won't go to the ball because it is a smaller figure than the earth and the ball has no gravitational force to orbit and anything the enters the earth is going to crash down to the surface onto the earth. hope this help's

8 0

4 years ago