Question

Find the components of the velocity vector in the northerly
and westerly directions. Enter your answers using three significant
figures separated by a comma.

How far north and how far west has the plane traveled after
4.00 h? Enter your answers using three significant figures
separated by a comma.

2. A football is kicked at ground level with a speed of 17.0
m/s at an angle of 38.5 ∘ to the horizontal.

How much later does it hit the ground?

Express your answer using three significant figures and
include the appropriate units.

Determine the maximum height reached by the projectile.

Express your answer using three significant figures and
include the appropriate units.

Answer #1

1.velocity along northern direction is, V is the actual velocity and theta (@) is the angle between the actual velocity and positive y axis.

North component velocity = (cos 41.5 x 835) = (1.4 x 625.178) =
625.378 km/h

West component velocity = (sin 41.5 x 835) = 553.2877 km/h

after 4 hour distance covered by north coponent =625.378*4=2501.512

after 4 hour distance covered by south coponent=553.2877*4=2213.1508

so Dnorth-Dsouth= 2501.512-2213.1508288.36km

2.by equation we have

y= vsin(@)t+ 0.5 at^2

for hitting the ground y=0

which gives t= -2vsin(@)/g

here g= -9.8m/s (g is acting downbard)

t=2.159 sec

3. Hmax= vsin(@)^2/2g

=(36.5sin(44.1))^2/2(9.8)

=32.918m

A car drives north at 50 mi/h for 10 min and then turns east and
goes 5.0 mi at 52 mi/h. Finally, it goes southwest at 32 mi/h for
6.0 min.
a) Determine the car's displacement.
Express your answers using two significant figures separated by
a comma. Assume that the positive xxx and yyy axes are directed to
the east and north, respectively.
b)
Determine its average velocity for this trip.
Express your answers using two significant figures separated by...

A car drives north at 34 mi/h for 10 min and then turns east and
goes 5.0 mi at 50 mi/h . Finally, it goes southwest at 28 mi/h for
6.0 min.
Determine the car's displacement.
Express your answers using two significant figures separated by
a comma. Assume that the positive xand y axes are
directed to the east and north, respectively.
Determine its average velocity for this trip.
Express your answers using two significant figures separated by
a comma....

A police car sounding a siren with a frequency of 1560 Hz is
traveling at 110 km/h . A.What frequencies does an observer
standing next to the road hear as the car approaches and as it
recedes? Express your answers using three significant figures
separated by a comma. B.What frequencies are heard in a car
traveling at 90.0 km/h in the opposite direction before and after
passing the police car? Express your answers using three
significant figures separated by a...

An airplane pilot sets a compass course due west and maintains
an airspeed of 218 km/h . After flying for a time of 0.500 h , she
finds herself over a town a distance 123 kmwest and a distance 17
km south of her starting point.
1. Find the magnitude of the wind velocity.
2. Find the direction of the wind velocity.
Express your answer as an angle measured south of west
3. If the wind velocity is 41 km/h...

An airplane is heading due south at a speed of 662 km/h . A wind
begins blowing from the southwest at a speed of 80 km/h (average).
In what direction should the pilot aim the plane so that it will
fly due south? Express your answer to three significant figures and
include the appropriate units.

A curve of radius 70 mm is banked for a design speed of 85 km/h
.
If the coefficient of static friction is 0.40 (wet pavement), at
what range of speeds can a car safely make the curve?
[Hint: Consider the direction of the friction force when
the car goes too slow or too fast.]
Express your answers using two significant figures separated by
a comma.
vmin, vmax = ????? km/h

1) A buffer contains significant amounts of ammonia and ammonium
chloride.
Part A
Write an equation showing how this buffer neutralizes added acid
(HI).
Express your answer as a chemical equation.
Part B
Write an equation showing how this buffer neutralizes added base
(CsOH).
Express your answer as a chemical equation.
2)
Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a
buffer with pH = 10.20.
Express your answer using two significant figures.
3) A 1.0-L buffer solution...

Consider an LR circuit when a 50.0-Hz 240-V
rms ac voltage is applied, where R = 2.30 kΩ , and
L = 410 mH .
What is the rms current the circuit?
Express your answer to three significant figures and include the
appropriate units.
What is the phase angle between voltage and current?
Express your answer using three significant figures.
How much power is dissipated?
Express your answer to three significant figures and include the
appropriate units.
What are the...

A ball is thrown toward a cliff of height h with a
speed of 25m/s and an angle of 60? above horizontal. It lands on
the edge of the cliff 4.0s later.
A.
How high is the cliff?
Express your answer to two significant figures and include the
appropriate units.
B.
What was the maximum height of the ball?
Express your answer to two significant figures and include the
appropriate units.
C.
What is the ball's impact speed?
Express your...

For each strong acid solutions, determine [H3O+],[OH−],
and pH.
Please Answer all parts separately Will be very helpful
!!!
Part A
0.20 M HCl
Enter your answers numerically separated by a comma. Express
your answer using two significant figures.
[H3O+], [OH−] = ________________ M
Part B
Express your answer to two decimal places.
pH= _______________
Part C
1.6×10−2 M HNO3
Enter your answers numerically separated by a comma. Express
your answer using two significant figures.
[H3O+], [OH−] = ______________ M...

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