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3 years ago

Why should the launch speed be greater than the minimum possible speed?

1 answer:

3 0

The launch speed gets a object into motion, so it has to be greater than the minimum possible speed to move forward against the other forces like gravity. Once it reached inertia then the minimum possible can be used

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What three forms of energy are represented when a match is lit?

AysviL [449]

Answer:

Three forms of energy when a match is being lit are potential, kinetic and thermal.

hope this helps! :)

Explanation:

4 0

3 years ago

Read 2 more answers

If a person weighs 160 Newtons on Earth, what is their weight in pounds on Earth?

Levart [38]

Answer:

B. 36 lb

Explanation:

m = 160/9.8 = 16.3 kg

16.3 kg ( 2.205 lb/kg) = 36 lb

5 0

3 years ago

A helium balloon is filled to a volume of 2.88 x 103 L at 722 mm Hg and 19Â°C. When the balloon is released, it rises to an alti

inn [45]

Answer:

V₂=4.57 x 10³ L

Explanation:

Given that

V₁= 2.88 x 10³ L

P₁=722 mm Hg

T₁ = 19°C

T₁ =292 K

P₂=339 mm Hg

T₂= - 55°C

T₂=218 K

Lets take final volume = V₂

We know that ideal gas equation

PV = m R T

By applying mass conservation

$\dfrac{P_1V_1}{RT_1}=\dfrac{P_2V_2}{RT_2}$

$\dfrac{722\times 2.88\times 10^3}{292}=\dfrac{339\times V_2}{218}$

V₂=4.57 x 10³ L

Therefore volume will be 4.57 x 10³ L

3 0

3 years ago

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

Sophie [7]

Answer:

4.1%

Explanation:

Given that water specific heat c = 4186 J/kgC. If water is flowing with mass rate of 200kg/s and temperature is dropping from 200C to 25C. Then the thermal energy rate from the water should be

$P_i = mc\Delta t = 200*4186*(200 - 25) = 146510000
J/s$ or 146510kW

Since the turbine is only able to extract 6000kW of power, then the thermal efficiency is:

$Eff = \frac{P_o}{P_i} = \frac{6000}{146510} = 0.041$ or 4.1%

8 0

3 years ago

Difference between national park and wild life reserve

OleMash [197]

Answer:

wildlife reserves are not available for camping...but you can camp at a skatepark

7 0

3 years ago