Universal QA

positiveWhen disconnecting the cables from the old battery, disconnect the negative first, then the positive. Connect the new battery in the reverse order, positive then negative.” When you are replacing your car battery, It isn’t always easy to remember the order in which to disconnect and reconnect the terminals. What happens if you connect the […]

If the ball thrown downward had the same initial speed as the ball thrown upward, it would have achieved exactly the same velocity when it hit the ground. If, on the other hand, the upward thrown ball had a higher initial speed, it would then have a higher final speed, and vice versa. Which ball […]

x-axisThe Axes. The independent variable belongs on the x-axis (horizontal line) of the graph and the dependent variable belongs on the y-axis (vertical line). Is the z axis dependent or independent? When you need to plot a third variable, you need a 3-dimensional graph with a third axis, the z-axis. The dependent variable is still […]

the x-axisThe horizontal axis is usually called the x-axis. The vertical axis is usually called the y-axis. The point where the x- and y-axis intersect is called the origin.

the exosphereYes, the exosphere is the least dense layer of the atmosphere. What layer of atmosphere is least dense? exosphereThe layer of the atmosphere that has the lowest density is the exosphere. Which layer is lightest least dense? The outer core is made up of slightly less dense material compared with the inner core, the […]

heliumThe element which has the smallest atomic mass is Hydrogen (H), which has a proton and an electron. The atomic radius decreases as we move from left to right along the period. And The atomic radius increases down the group. Thus, helium is the smallest element, and francium is the largest.

Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy. Which aspect of a chemical reaction is affected by enzymes quizlet? Enzymes speed up chemical reactions by lowering the amount of activation energy […]

The aortaThe aorta is the largest artery because it connects directly to the heart and is the starting point for blood transport to the entire body. Which is the largest artery in the body why it is the largest? AortaAorta is the largest artery since it is the ultimate artery where the blood enters as […]

The two chemicals used in the disinfection of water are chlorine and ozone. What are two ways to purify water? There are several methods used in the water purification process, which include: (1) physical processes, such as filtration, sedimentation, or distillation

Insects are the only invertebrates than can fly. Are insects the only invertebrates that can fly? Insects are the only invertebrates that can fly. Which group of the invertebrates is the only one that flies? True flies belong to a group of insects called Diptera which means ‘two-winged’. Although we often think of them as […]