emily recorded her scores in four science tests. there were 60 questions in each test. in which test did she score the least?

Emily recorded her scores in four Science tests. There were 60 questions in each test. In which test did she score the least? => Test 4 or Testh..

Question: How much would a man, whose mass is 60 kg weigh on the moon? 1. 9.8 N 2. 600 N 3. 60 N 4. 98 N Answer: 4..

Question: The difference between Homo sapiens and the Homo erectus was ____. . 1. Homo sapiens originated in Africa while Homo erectus was in Asia 2. Homo eructus were much smaller in size than homo sapiens. 3. Homo eructus stayed in Africa while Homo sapiens did..

Question: Radius of curvature of a concave mirror is always _____ to the mirror. 1. parallel 2. perpendicular 3. inclined at 60 o 4. inclined at 45 o Answer: ..

Question: A man of mass 50 kg jumps to a height of 1 m. His potential energy at the highest point is (g = 10 m/s 2 ) 1. 50 J 2. 60 J 3. 500 J 4. 600 J Answer: ..

Question: What is the value of q in the following diagram? 1. 30 o 2. 45 o 3. 90 o 4. 60 o Answer: 4..

The changes we have discussed so far concern themselves with variations within a species, but how do new species evolve? For instance how did man develop from apes? Speciation is the evolutionary process by which new biological species arise. A new species will be a group of individuals ..

At 170 o C ethyl alcohol undergoes dehydration when treated with concentrated H 2 SO 4 to form ethane. At lower temperature of 140 o C and when present in excess ethyl alcohol forms a pleasant smelling substance called diethyl ether..

. Hydrocarbons and their major sub groups form a homologous series of organic compounds. As an illustrative example, the simplest of all hydrocarbons is methane whose molecular formula is CH 4 . This molecule consists of a single carbon atom linked to four hydrogen atoms by sing..

Metallic surfaces exposed to acid rain are readily corroded. Textile fabrics, paper and leather products lose their material strength or disintegrate by the acid rain. Building materials such as limestone, marble, dolomite, mortar and slate are weakened on reaction with acid rains because of the f..