All categories

3 years ago

A jet can travel the 6000 km distance between washington,

1 answer:

6 0

d = r*t is the basic distance equation
d = 6000 km
t with the tail wind = 6 hr
r with the tail wind = speed of the plane + wind speed = s + w
t with the head wind = 7.5 hr
r with the head wind = speed of the plane - wind speed = s-w
(s+w)*6 = 6000
(s-w)*7.5 = 6000
s + w = 1000
s - w = 800
 2s = 1800
s = 900 km/h
s + w = 1000
w = 100
Check the anwer by calculating the return trip.
(900-100) * 7.5 = 800 * 7.5
800 * 7.5 = 6000 km
Answer: The rate of the jet in still air is 900 km/h. The rate of the wind is 100 km/hr.

You might be interested in

A roadway for stunt drivers is designed for racecars moving at a speed of 40 m/s. A curved section of the roadway is a circular

Fynjy0 [20]

Answer:

Bank angle = 35.34o

Explanation:

Since the road is frictionless,

Tan (bank angle) = V^2/r*g

Where V = speed of the racing car in m/s, r = radius of the arc in metres and g = acceleration due to gravity in m/s^2

Tan ( bank angle) = 40^2/(230*9.81)

Tan (bank angle) = 0.7091

Bank angle = tan inverse (0.7091)

Bank angle = 35.34o

3 0

3 years ago

Explain Bernoulli's Principle, air pressure, Down Wash, Angle of Attack, and vortices simply.

lord [1]

just listen I am also confused in this question if you get the answer so please just tell me also

3 0

3 years ago

A 1000-kg car traveling at 70 m/s takes 3 m to stop under full braking. the same car under similar road conditions, traveling at

azamat

We assume $a=const$ (acceleration is constant. We apply the equation
$v^2=v0^2+2as$ where s is the distance to stop $v=0(m/s)$ . We find the acceleration from this equation
$a=-v0^2/(2s)=-70^2/(2*3) =-816.7 (m/s^2)
$
We know the acceleration, thus we find the distance necesssary to stop when initial speed is $v=140 (m/s)$
$s=-v0^2/(2a) =140^2/(2*816.7)=12 (m)$

5 0

3 years ago

A rechargeable battery is capable of delivering a current of 0.25 A for 1800 s at a potential difference of 1.5 V.

avanturin [10]

Answer:

a. q=450 c

b. E=675 J

Explanation:

Direct Current (DC)

It's the flow of electric charges in one direction driven by a constant voltage circuit. The intensity of the current flow is computed as

$\displaystyle I=\frac{q}{t}$

Where q is the constant flow of charge in time t

The energy of an element providing Voltage V, current I during a time t is

$E=V.I.t$

a. The charge can be computed by solving the first equation for q

$q=I.t=0.25\ A.\ 1800\ s=450\ c$

b. The energy transferred by the battery is

$E=(1.5).(0.25).(1800)=675\ J$

5 0

3 years ago

The law of conservation of momentum of two interacting objects that make up a system

Aleonysh [2.5K]

The law of conservation of momentum states that, if left alone, the total momentum of two interacting objects that make up a system remains the same.

6 0

3 years ago