3 years ago

Assuming the speed of sound is 340 m/s, what is the most likely speed of the jet shown below?

Physics

1 answer:

inysia [295]3 years ago

7 0

Well we know it has to be greater than 300,000 km/s since we can't see it.

We can't calculate it any closer than that using the given information.

You might be interested in

A Drive to the BeachMary drove from her home to the beach that is 30 mi from her house. The first 15 mi she drove at 60 mph, and

Allushta [10]

Answer:

Explanation:

Let us calculate the average velocity .

Average velocity = total distance / total time

Time taken to drive first 15 mi

= 15 / 60 = .25 h

Time taken to drive next 15 mi

= 15 / 30 = .5 h

Total time = .25 + .5 = .75 h

Total distance = 30 mi

average speed = 30 / .75

= 40 mi / h

So average speed is 40 mph which is less than given velocity of 45 mph .

Hence if she travels at 45 mph , she will take less time .

5 0

3 years ago

3. Two spherical objects at the same altitude move with identical velocities and experience the same drag force at a time t. If

Daniel [21]

Answer:

Object 2 has the larger drag coefficient

Explanation:

The drag force, D, is given by the equation:

$D = 0.5 c \rho A v^2$

Object 1 has twice the diameter of object 2.

If $d_2 = d$

$d_1 = 2d$

Area of object 2, $A_2 = \frac{\pi d^2 }{4}$

Area of object 1:

$A_1 = \frac{\pi (2d)^2 }{4}\\A_1 = \pi d^2$

Since all other parameters are still the same except the drag coefficient:

For object 1:

$D = 0.5 c_1 \rho A_1 v^2\\D = 0.5 c_1 \rho (\pi d^2) v^2$

For object 2:

$D = 0.5 c_2 \rho A_2 v^2\\D = 0.5 c_2 \rho (\pi d^2/4) v^2$

Since the drag force for the two objects are the same:

$0.5 c_1 \rho (\pi d^2) v^2 = 0.5 c_2 \rho (\pi d^2/4) v^2\\4c_1 = c_2$

Obviously from the equation above, c₂ is larger than c₁, this means that object 2 has the larger drag coefficient

8 0

3 years ago

Need ASAP!! An object lies motionless on a rough inclined surface .

PSYCHO15rus [73]

Answer:

yes

Explanation:

yes

7 0

3 years ago

Read 2 more answers

A car starts from rest and accelerates uniformly over a time of 5.37 seconds for a distance of 101 m. Determine the acceleration

castortr0y [4]

Answer:

8.10m s-2

Explanation:

8 0

4 years ago

Copy the diagram. add a voltmeter to show how you would measure the voltage of the cell

Kruka [31]

Answer: the answer is 23voltage

Explanation: because the voltage and time put together is 23

7 0

3 years ago