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2 years ago

9) Suppose it takes a plane 5 hours to travel from Philadelphia to San Francisco. It

Physics

1 answer:

olasank [31]2 years ago

5 0

Answer:

2500miles

Explanation:

Given parameters:

Time of travel = 5hrs

Average speed = 500miles/hr

Unknown:

Distance between the two cities = ?

Solution:

To solve this problem, we must understand that speed is the distance covered with time.

So;

Distance = speed x time

Distance = 500 x 5 = 2500miles

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In countries where there is very hot and very cold weather, should the gaps between the lengths of railway track be wider or nar

kipiarov [429]

They should be bigger as if it is hot the tracks will expand as it is made of metal and then there is more room for it to expand or contract

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3 years ago

Which statement describes the process of subduction? Convection currents pull a plate into the mantle. One plate slides beneath

mixas84 [53]

Answer:

Subduction is the geological process in which one plate moves under another due to gravitational pull. The regions where this process occurs called subduction zones.

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Example: South America, central America and cascade volcanoes. In which the oceanic plate descends beneath a continental plate.

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3 years ago

Read 2 more answers

Compare the energy consumption of two commonly used items in the household. Calculate the energy used by a 1.40 kW toaster oven,

andrew-mc [135]

Energy = (power) x (time)

-- For the toaster:

Power = 1.4 kW = 1,400 watts

Time = 5.4 minutes = 324 seconds

Energy = (1,400 W) x (324 s) = 453,600 Joules

-- For the CFL bulb:

Power = 11 watts

Time = 10.5 hours = 37,800 seconds

Energy = (11 W) x (37,800 s) = 415,800 Joules

-- The toaster uses energy at 127 times the rate of the CFL bulb.

-- The CFL bulb uses energy at 0.0079 times the rate of the toaster.

-- The toaster is used for 0.0086 times as long as the CFL bulb.

-- The CFL bulb is used for 116.7 times as long as the toaster.

-- The toaster uses 9.1% more energy than the CFL bulb.

-- The CFL bulb uses 8.3% less energy than the toaster.

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2 years ago

A track star runs 100 meters in 10 seconds. What is the star's average speed?

kakasveta [241]

Answer:

10m/s

Explanation:

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2 years ago

How do sea surface temperatures affect evaporation rate?

kotegsom [21]

Answer: The temperature doesn't affect the evaporation rate, but affects on how much of water a parcel of air can contain when saturated which is known by the absolute humidity. Hurricanes are usually happening when the temperature of the sea water west of the Cape Verde islands is over 27 degrees Celsius. If ahead of the path of a hurricane, the sea water temperature drops then it will be less moisture in the air and perhaps the hurricane will fade out. But it is not as simple. How strong a tropical storm is is relative to the difference of temperture between ground level and the top of the troposphere. The greater the difference, the faster the air will rise and the deeper the pressure will be, forcing surrounding air to rush in, thus forming a hurricane force wind. Then there is the fact that the wet adiabatic lapse rate is about half that of dry air. It means that rising moist air cools down slower and therefore rises higher. Hence water is the true fuel of bad weather. But it can't be isolated from the fact that the difference of temperature must be great too. What we often forget is that the tropopause (the border to the stratosphere) is much higher over the equator and therefore, much colder than e.g. the poles.

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3 years ago