How much is the acceleration of an airplane if it starts at 0 m/s and takes off

Question

How much is the acceleration of an airplane if it starts at 0 m/s and takes off at 90 m/s, and it takes 15 seconds for it to take off? Question 1 options: 60 m/s2 .6 m/s2 6 m/s2 600 m/s2

Question 2 (4 points) Question 2 Unsaved How far is the Moon from the Earth if a laser is shot from the Earth, reflected from a mirror left on the lunar surface, and received back on Earth 2.6 seconds later? Use 186,000 miles/sec for the speed of light. Question 2 options: 484 million miles 242,000 miles 484,000 miles 242 million miles Save Question 3 (4 points)

How does a planet’s albedo affect its surface temperature? Question 4 options: Albedo has no effect on surface temperature The lower the albedo, the lower the surface temperature The higher the albedo, the higher the surface temperature The lower the albedo, the higher the surface temperature Save

Question 5 (4 points) Question 5 Unsaved Which of the following is an example of geo-engineering? Question 5 options: Gasification of coal Dispersing light-reflecting aerosols in the stratosphere to reduce solar heating of the Earth Drilling boreholes in rock deep into geological formations Using the heat of the Earth as a power source

Question 6 (4 points) Question 6 Unsaved What feedbacks do clouds provide in atmospheric warming? Question 6 options: Cloud cover heats the atmosphere. Clouds have no effect. Clouds with high cloud tops reduce atmospheric heating, while low clouds increase atmospheric heating. Clouds block the sunlight and cool the atmosphere. Save Question 7 (4 points)

Question 7 Unsaved Which of the following acts as a greenhouse gas? Question 7 options: Water vapor All of the above Methane Carbon dioxide

Question 8 (4 points) Question 8 Unsaved When was the Last Glacial Maximum? Question 8 options: About 180,000 years ago About 1800 years ago About 18,000 years ago About 18 million years ago Save Question 9 (4 points) Question 9 Unsaved What natural process formed coal and petroleum on Earth 280 to 395 million years ago?

Question 9 options: Tectonic process acting upon the magma Marine sediments buried rocks and minerals and heat, pressure and time converted these substances Marine sediments buried dead plants and animals, and over time the pressure of the accumulated sediments converted these substances Lava from volcanoes buried living plants and animals, the heat and pressure of the volcanic rock formed created coal and petroleum

Question 10 (4 points) Question 10 Unsaved What was the likely cause of the Little Ice Age according to climate critics? Question 10 options: Increased cloud layers blocked the Sun. Soot from burning coal blocked the Sun. Ice moved to lower latitudes as shipping interests grew. Solar intensity diminished in this time.

Question 11 Unsaved What element from fossil fuels is combined with oxygen to produce carbon dioxide any time a fossil fuel is burned? Question 11 options: Carbon Hydrogen Water Carbonic acid Save Question 12 (4 points) Question 12 Unsaved What is solar thermal technology?

Buildings are heated by the Sun’s rays. Solar energy is converted directly to electricity with solar panel. Sunlight energy is captured by heating water to produce steam which is used to create electricity in a steam turbine. Solar energy is shielded from heating buildings.

What is the Maunder Minimum? Question 13 options: A period of reduced sunspot activity lasting 70 years in the 16th and 17th centuries The minimum height ever seen in sea level The lowest point on the Earth’s surface The minimum amount of sunshine needed to sustain the Earth Save Question 14 (4 points)

How much kinetic energy does a baseball thrown at 30 m/s have, if it has a mass of .25 kg? Question 14 options: 11.25 Joules 1125 Joules 11,255 Joules 112.5 Joules Save Ques

If 2 megajoules of heat are applied to 20 kg of water, how much will the temperature change? Use 4.185 J/g oC for the specific heat of water. Question 15 options: 2389 o C 2.3 o C 238.9 o C 23.89 o C

Explanation / Answer

1.6m/s2,accerlation can be calculated by using formula a=final velocity-initial velocity/timetaken.

2.242,000 miles/sec,D=speed of light*timetaken to reflect/2

3.lower the albedo,higher the temperature

4.Gasification of coal,geo engineering mostly cover the environmental process which affects the temperature.

5.Clouds with higher at top reduce the atmospheric heating

6.all the above(methne,co2,water vapour,cfc etc)

7.180000 years ago last glacial occurs

8.heat and pressure of volcanic forms coal and petroleum

9.solar intensity dimished in this time

10.carbon

11.solar energy is converted directly into electricity with the help of solar panel

12.a period of reduced sunspot activity lasting 70 years in the 16th and 17th centuries.

13.112.5 joules

14.2.3 degree celsius

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