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4 years ago

13

A -__ (2 words) analysis is a way of determining whether a project, such as one for conserving resources, is worth d

oing.

1 answer:

maw [93]4 years ago

6 0

The answer is Cost-Benefit

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The equation e = mc2 relates mass and <br> a. energy <br> b. force <br> c. work <br> d. gravity

bixtya [17]

It relates mass to energy

5 0

3 years ago

Two sailboats leave a harbor in the bahamas at the same time. the first sails at 23 mph in a direction 330°. the second sails at

pishuonlain [190]

First, let us calculate the total distance that each have taken after 2 hours.

Let’s say that:

A = sailboat which sails at 23 mph in a direction 330°

B = sailboat which sails at 34 mph in a direction 190°

Calculating for distances:

dA = 23 mph (2 hours) = 46 miles

dB = 34 mph (2 hours) = 68 miles

Imagining a Cartesian coordinate, the angle θ between the two sailboats is simply the difference:

θ = 330° - 190°

θ = 140°

We know that from the law of cosines:

c^2 = a^2 + b^2 – 2 a*b*cos θ

Therefore the distance between the two after 2 hours, C, is:

C^2 = 46^2 + 68^2 – 2 (46) (68) cos(140)

<span>C = 107.39 miles</span>

7 0

4 years ago

a bicyclist was moving at a rate of 8 m/s and then sped up to 10 m/s. If the cyclist has a mass of 120 kg, how much work is need

marishachu [46]

A bicyclist was moving at a rate of 8 m/s and then sped up to 10m/s.

6 0

3 years ago

Seismographs measure the arrival times of earthquakes with a precision of 0.125 s. To get the distance to the epicenter of the q

zloy xaker [14]

Answer:

435 m

Explanation:

The precision with which the distance to the source of the earthquake can be estimated is equal to the difference in distance covered by the S- and P-waves in the time of 0.125 s.

The distance covered by each type of wave is given by

$d=vt$

where

v is the speed of the waves

t is the time

For S-waves,

v = 3.74 km/s

t = 0.125 s

So the distance covered is

$d_s=(3.74)(0.125)=0.4675 km = 467.5 m$

For P-waves,

v = 7.22 km/s

t = 0.125 s

So the distance covered is

$d_p=(7.22)(0.125)=0.9025 km = 902.5 m$

So, the precision with which the distance can be determined is:

$\Delta d = 902.5 - 467.5 =435 m$

4 0

3 years ago

What is the acceleration of a 1200 kg car when a force of 4200 N is applied?

goldenfox [79]

Force=mass* acceleration
Therefore
4200=1200* acc.
Acceleration =4200/1200
Therefore acc.=3.5
(* this sign indicates multiply)

6 0

3 years ago