Johnny is seven years older then his little sister. let j represent jonny's age and s represent his sister

How does a laser-ranging device work?

Choose one of the above renewable energy sources biomass or gas or wave energy and explain what exactly it is and how exactly it works

5. What city is the "spiritual home' to 3 of the world's major religions? What religions are those?

Where are volcanoes most likely to form

Henry was having glass of water with some ice cubes in it and kept it near a window for some time. After some time, the water became warm. What is this process called? A. condensation B. freezing C. melting D. sublimation E. evaporation

How high does the earth's atmosphere extend? A. 100 m B. 1,000 m C. 10 km D. 100km

How to grow plants in space?

Based on this map of oil imports, which nation imported the greatest number of oil barrels each day in the years before 2006? A. China B. Australia C. Canada D. the United States

How far will a P-wave travel in 9 min 20 sec?

The land in Mexico City is sinking. What is the primary cause of this problem? A. deforestation caused by cutting down trees B. too much water being taken from underground aquifers C. too many offices and towers being built in the city D.