Electromagnetic waves all move at the same wave speed. which of these offer solutions to slowing them down select all that apply

Gasoline burns in the cylinder of an automobile engine. During the combustion reaction, the production of gas forces the piston

serg [7]

Answer:

$\Delta U = 1640 J$

Explanation:

As we know by first law of thermodynamics that for ideal gas system we have

Heat given = change in internal energy + Work done

so here we will have

Heat given to the system = 2.2 kJ

Q = 2200 J

also we know that work done by the system is given as

$W = 560 J$

so we have

$\Delta U = Q - W$

$\Delta U = 2200 - 560$

$\Delta U = 1640 J$

6 0

4 years ago

If a car moves with constant velocity, does it also move with a constant speed?

GarryVolchara [31]

Answer:

Yes. The fact that an object moves at constant velocity implies that its speed is also constant. Note that the converse statement isn't necessarily true.

Explanation:

Velocity is a vector. For two vectors to be equal to each other,

their magnitudes (sizes) need be the same, and
they need to point in the same direction.

In motions, the magnitude of an object's velocity is the same as its speed.

If the car moves with a constant velocity, that means that

the magnitude of its velocity, the speed of the car, is constant;
also, the direction of the car's motion is also constant.

In other words,

$\text{Velocity } \vec{v}\text{ is constant} \implies \text{Speed }v\text{ is constant}$ .

Note that the arrow here points only from the velocity side to the speed side. It doesn't point backward because knowing that the speed of an object is constant won't be sufficient to prove that the velocity of the object is also constant. For example, for an object in a uniform circular motion, the speed is constant but the direction keeps changing. Hence the velocity isn't constant.

3 0

3 years ago

In part d, you saw that elements with even atomic numbers tend to be more abundant than neighboring elements with odd atomic num

jolli1 [7]

The atomic procedure clarifies why this is the situation is beginning from carbon ( the nuclear number is 6), the most widely recognized atomic responses include the combination of an extra helium core. I hope the answer will help you.

8 0

3 years ago

Why does the moon have a stronger effect on tides than the sun?

Nezavi [6.7K]

The moon is closer to the earth than the sun

4 0

3 years ago

I need to solve this problem

castortr0y [4]

Answer:

λ = V / f the wavelength versus the frequency

V = f λ and V (speed) proportional λ for a fixed frequency

F = f^2 * (M / L) * λ^2 = (f * λ)^2 * (M / L)^2 force (tension) on string at a given frequency

F2 / F1 = (λ2 / λ1)^2 other items are constant

Let λ1 = 6 then λ2 must be 3/2 λ1 for a constant length

F2 / F1 = (6 / 4)^2 = 9/4

The tension must be increased to 9 / 4 of the original tension

Check: if the frequency is fixed then V will be larger for a larger wavelength (situation 2)

One can also write V = (F / (M / L))^1/2

Then for fixed M L

F2 / F1 = (V2 / V1)^2

Since V = f λ Velocity is proportional to λ for a fixed frequency

Then if V2 / V1 = 3 / 2 F2 = 9/4 F1

4 0

2 years ago