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andrezito [222]

4 years ago

7

What is the acceleration due to gravity at an altitude of 116?

1 answer:

Schach [20]4 years ago

7 0

Gravitational acceleration (Ga) is inversely proportional to k / Distance^2

so Ga * Distance^2 = K

On the surface of Earth acceleration due to gravity is about 9.8m/s^2 with an average distance to the earths core of about 6371 km (Wolfram alpha).

So k = 9.8 * 6371^2
I'm presuming that your distance of 116 is km

As
Ga = k / distance^2

Ga = ((9.8 * 6371^2) / (6371 + 116)^2 ) = 397778481.8 / 42081169

= 9.45 m/s^2 to 2sf

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How much kinetic energy does a care 1000 kg car moving at 7 m/s have?

aalyn [17]

Hey there!

<span>How much kinetic energy does a care 1000 kg car moving at 7 m/s have?

Answer:
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5 0

3 years ago

Assume that you have 0.480 mol of N2 in a volume of 0.700 L at 300 K .

Svetach [21]

Answer:

1) 16.88 atm

2) 34.47 atm

Explanation:

Data:

Volume=0.700L

Temperature = 300K

Number of moles=0.480 mol

Ideal gas constant=0.082057 L*atm/K·mol

1) The ideal gas law is:

$PV=nRT$ (1)

with P the pressure, T the temperature, n the number of moles, V the volume and R the ideal gas constant , so solvig (1) for P:

$P=\frac{nRT}{V}$

$P=\frac{(0.480)(0.082057)(300)}{0.700}=16.88 atm$

2) The vander Walls equation is:

$(P+\frac{a}{V^{2}})(V-b)=RT$

solving for P

$P=\frac{RT}{V-b}-\frac{a}{V^2}=\frac{(0.082057)(300)}{0.700-0.0387}-\frac{1.35}{0.700^2}=34.47 atm$

4 0

3 years ago

A mover uses a ramp to load a crate of nails onto a truck. The crate, which must be lifted 1.5 m from the street to the bed of t

jonny [76]

Answer:

<h2>3</h2>

Explanation:

Using the efficiency formula. Efficiency = MA/VR * 100%

MA = Mechanical Advantage

VR = velocity ratio = $\frac{distance\ moved\ by\ effort}{distance\ moved\ by\ load}$

Distance moved by effort = 4.5m

distance moved by load = 1.5m

VR = 4.5/1.5 =3

Assuming efficiency is 100% (since friction can be ignored)

100% = MA/3 * 100%

1 = MA/3

MA = 3*1

MA = 3

Mechanical Advantage of the ramp is 3

8 0

4 years ago

A red shirt appears red because?

pickupchik [31]

Red shirt appears red because:

a. The shirt reflects red light

3 0

3 years ago

A roller coaster car rapidly picks up speed as it rolls down a slope. as it starts down the slope, its speed is 4 m/s. but 3 sec

Arisa [49]

Vi = 4 m/s
vf = 22 m/s
t = 3s
a = ?

vf = vi + a * t
vf - vi = a * t
a = (vf - vi) / t
a = (22 - 4) / 3
a = 6 m / s^2

8 0

3 years ago