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3 years ago

If it were to snow in Phoenix in July, which type of Earth scientist would be most surprised?

Physics

1 answer:

KonstantinChe [14]3 years ago

7 0

Answer:

Economists, I guess.

Explanation:

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A 0.017 g coin sliding to the right at 0.255 m/s makes an elastic head-on collision with a 0.040 g coin that is initially at res

zysi [14]

Answer:

$\approx 0.154\:\mathrm{m/s}$

Explanation:

In all collisions, whether elastic or inelastic, momentum must be conserved. Therefore, we can write an equation using the conservation of momentum:

$m_{c1}v_{c1,i}+m_{c2}v_{c2,i}=m_{c1}v_{c1,f}+m_{c2}v_{c2,f}$

Solving for $v_{2c,f}$ :

$0.000017\cdot 0.255+0.000040\cdot0=0.000017\cdot (-0.108)+0.000040\cdot v_{c2,f},\\v_{c2,f}\approx \boxed{0.154\:\mathrm{m/s}}$

*Notes:

-It's important to convert g to kg, as kg is the SI unit of mass

-The negative sign in a velocity measure represents direction

-Since the velocity we solved for is positive, it implies that the direction is to the right

5 0

3 years ago

f an earthquake’s magnitude is measured based on the richter scale, how is this abbreviated? a. mr b. ms c. ml d. mb

zhannawk [14.2K]

The answer is A. Hope this helps!

5 0

3 years ago

Which of the following describes the relationship between work and power?

Vinvika [58]

Answer: The answer is B

Explanation:

Work can be defined as the energy that is required to apply a force to an object in order to move it from one point to another. In physics, work = force x distance travelled. On the other hand, Power is the work done per time. In other words, it the rate at which work is done and is determined by using the formula, Power = Work/time. In these relationships, it can be seen that power is directly proportional to the amount of work done, hence as power increases, more work is done.

6 0

4 years ago

You throw a baseball a distance of 20 meters. Is it work or not work?

OverLord2011 [107]

Yes it is work because when you throw a ball, you transfer energy to it and it moves.

7 0

3 years ago

If an object with 1000 lb of weight is to be raised vertically from ground level to 5 ft in two seconds, how much power is requi

tino4ka555 [31]

Answer:

The power required = 3390.9 W

Explanation:

Power: This can be defined as the time rate of doing work. The S.I unit of power is Joules.

Mathematically it can be expressed as,

P = Work/time or

P =W×V...................... Equation 1

Where P = power, w = weight, V = velocity.

Also

V = d/t ..................... Equation 2

Where d = distance, t = time.

Conversion: d = 5ft

If 1 foot = 0.3048 meters

Then, 5 ft = 5×0.3048 meters = 1.524 m.

W = 1000 lb

If 1 lb = 4.45 N,

Then 1000 lb = 1000× 4.45 N = 4450 N.

Given: d = 1.524 m, t = 2 s.

Substituting these values into equation 2

V = 1.524/2

V = 0.762 m/s.

Also substituting into equation 1

P = 4450×0.762

P = 3390.9 W.

Thus the power required = 3390.9 W

8 0

4 years ago