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3 years ago

If 2.0j of work is done in raising 180g apple, how far was it lifted?

Physics

1 answer:

Nikitich [7]3 years ago

4 0

Work = (force)x(distance)

Since we're lifting, the 'force' is the weight of the apple.

Weight = (mass)x(gravity)

Weight = (0.180 kg)x(9.8 m/s^2)

Weight = 1.764 Newtons

2.0 J = (1.764 N) x (distance)

Distance = 2.0J / 1.764N

Distance = 1.13 meters

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A geothermal plant uses geothermal water (yes a liquid) extracted from beneath the Earth using drilling apparatus. The geotherma

leva [86]

To solve this problem it is necessary to apply the concepts of heat change and thermal efficiency.

The heat rate can be expressed under the function

$Q = \dot{m} (h_1-h_2)$

Where,

m = Mass

$h_i =$ Enthalpy at each state

Our values are given as,

$\dot{m} = 200kg/s$

$T_H = 200\°C$

$W = 6000kW$

$T_{H,2} = 90\°C$

$T_L = 25\°C$

From the tables of Enthalpy of Water at 200°C (Saturated liquid state)

$h_1 = 852.4kJ/Kg$

At the same time for 80°C

$h_2 = 334.9kJ/Kg$

Applying the equation of Heat,

$Q = \dot{m}(h_1-h_2)$

Replacing,

$Q = 200*(852.4-334.9)$

$Q = 103500kW$

Therefore the efficiency would be

$\eta = \frac{Q_L}{Q_H}$

$\eta = \frac{6000}{103500}$

$\eta = 0.0579$

Therefore the actual thermal efficiency of the turbine in percent is 0.0579.

6 0

3 years ago

A Ford Taurus driven 12,000 miles a year will use about 650 gal of gasoline compared to a Ford Explorer that would use 850 gal.

irga5000 [103]

Answer:

19 800 lbm of carbon dioxide more.

Explanation:

Taurus

Amount of gasoline used in 5 years = 650 ga/year * 5 years = 3250 ga

amount of carbon dioxide released = 19.8 lbm/ga * 3250 ga = 64 350 lbm

Explorer

Amount of gasoline used in 5 years = 850 ga/year * 5 years = 4250 ga

amount of carbon dioxide released = 19.8 lbm/ga * 4250 ga = 84 150 lbm

Extra amount of CO2 released = 84 150 lbm - 64 350 lbm = 19 800 lbm

4 0

4 years ago

Which type of electronic community allows real-time discussion among members?

Brilliant_brown [7]

Instant messaging is the type of electronic community that allows real-time discussion among members.

Instant messaging (IM) is a type of online chat which offers real-time text transmission over the Internet. A LAN messenger operates in a similar way over a local area network.

I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

4 0

4 years ago

A bolt is to be tightened with a torque of 7.0 N · m. If you have a wrench that is 0.55 m long, what is the least amount of forc

kodGreya [7K]

To solve this problem we will apply the given concept for torque which explains the relationship between the force applied and the distance to a given point. Mathematically this relationship is given as

$\tau = F*d \rightarrow F = \frac{\tau}{d}$

Where,

$\tau =$ Torque

F = Force

d = Distance

Our values are given as,

$\tau = 7.0Nm , d = 0.55m$

Therefore replacing we have that the force is

$F = \frac{7}{0.55}$

F = 12.72N

Therefore the least amount of force that you must exert is 12.72N

4 0

3 years ago

You accelerate your 1500 Kg car from 2 m/s to 12 m/s in 2 seconds. How do you determine

laiz [17]

1) The acceleration

Acceleration = Change in Speed / Time
Acceleration = (12 - 2) / 2
Acceleration = 10 / 2
Acceleration = 5m/s^2 (This is the unit for acceleration)

2) Initial momentum

Momentum = Mass x Velocity
Momentum = 1500 x 2
Momentum = 3000kg m/s (This is the unit for momentum)

3) Final momentum

Momentum = Mass x Velocity
Momentum = 1500 x 12
Momentum = 18000kg m/s

4) Change in momentum

Change in momentum = Final momentum - Initial momentum
Change in momentum = 18000 - 3000
Change in momentum = 15000kg m/s

5) Force

Force = Mass x Acceleration
Force = 1500 x 5
Force = 7500N (This is the unit for force)

Hope that helps :)

6 0

4 years ago