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grandymaker [24]
3 years ago
12

A plane flies 1,995 miles in a southwesterly direction from Baltimore to Phoenix in 5.00 hours . What is the velocity of the pla

ne ?
Physics
1 answer:
disa [49]3 years ago
4 0

displacement of the plane is given as

d = 1995 miles

time taken by the plane

t = 5.00 hours

now the velocity is given as

v = \frac{displacement}{time}

v = \frac{1995}{5}

v = 399 mi/h

so the velocity of airplane is 399 mi/h towards South West

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An air track car with a mass of 0.75 kg and a velocity of 8.5 m/s to the right collides elastically with a 0.65kg car moving to
Sunny_sXe [5.5K]
We can do this with the conservation of momentum. The fact it is elastic means no KE is lost so we don't have to worry about the loss due to sound energy etc.

Firstly, let's calculate the momentum of both objects using p=mv:

Object 1:
p = 0.75 x 8.5 = 6.375 kgm/s

Object 2 (we will make this one negative as it is travelling in the opposite direction):
p = 0.65 x -(7.2) = -4.68 kgm/s

Based on this we know that the momentum is going to be in the direction of object one, and will be 6.375-4.68=1.695 kgm/s

Substituting this into p=mv again:

1.695 = (0.75+0.65) x v
Note I assume here the objects stick together, it doesn't specify - it should!

1.695 = 1.4v
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8 0
3 years ago
Please Help!.....................
Setler79 [48]
The awnser is tranverse wave
hope that helps

4 0
3 years ago
HEY CAN ANYONE PLS ANSWER DIS!!!!!!
antiseptic1488 [7]

Answer:

I think That All the atoms of a given element are identical in that they have the same number of protons

Explanation:

3 0
3 years ago
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At the end of a delivery ramp, a skid pad exerts a constant force on a package so that the package comes to rest in a distance d
MatroZZZ [7]

Answer:

increases by a factor of \sqrt{2}

Explanation:

First we need to find the initial velocity for it to stop at the distance 2d using the following equation of motion:

v^2 - v_0^2 = 2a\Delta s

where v = 0 m/s is the final velocity of the package when it stops, v_0 is the initial velocity of the package when it, a is the deceleration, and \Delta s = d is the distance traveled.

So the equation above can be simplified and plug in Δs = d, v_0 = v_1 for the 1st case

-v_1^2 = 2ad(1)

For the 2nd scenario where the ramp is changed and distance becomes 2d, v_0 = v_2

-v_2^2 = 4ad(2)

let equation (2) divided by (1) we have:

\left(\frac{v_2}{v_1}\right)^2 = 4ad / 2ad = 2

v_2 / v_1 = \sqrt{2}

v_2 = \sqrt{2}v_1

So the initial speed increases by \sqrt{2}. If the deceleration a stays the same and time is the ratio of speed over acceleration a

t = v / a

The time would increase by a factor of \sqrt{2}

7 0
4 years ago
Technician A says that some ABS wheel speed sensors are used as part of the tire pressure monitoring system (TPMS) . Technician
erica [24]

Answer:

The correct answer is C) Technician A and B are both correct.

Explanation:

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Anti-lock braking systems since their invention and introduction, have been improved remarkably in a bid to further improve driver safety and comfort.  <em>Recent technology not only prevents wheel lock up under braking, but can also provide data for the on board navigation system, traction control system, emergency brake assist, </em><u><em>hill start assist</em></u><em>, electronic stability control and the front-to-rear brake bias</em>. None of the above would be possible without wheel speed sensors.

The Tire Pressure Monitoring System (TMPS) is an electronic system in your vehicle that monitors your tire air pressure and alerts you when it falls dangerously low.

Indirect TPMS works with your car’s Antilock Braking System’s (ABS) wheel speed sensors. If a tire’s pressure is low, it will roll at a different wheel speed than the other tires. This information is detected by your car’s computer system, which triggers the dashboard indicator light.

Cheers!

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