We are talking about factors here, which means multiplication and division. To turn 12 into 4, you must divide by 3. Thus, the distance was reduced by a factor of 3. ...
Molecules are, indeed, made up of atoms. However, it is not right to say that salt is made up of atoms. Salt gets all of its properties not from the sodium atoms and chlorine atoms that compose the molecule, but from the unique arrangement of sodium and chlorine in a salt MOLECULE. Sodium atoms have NOTHING in common w...
Most people have problems with this experiment because they do not square the time, as the equation says that you must. If your rooms are like most people’s rooms, you should have gotten a time of 0.60 to 0.80 seconds. Let’s suppose you got 0.70 seconds. distance = (1/2) x (acceleration) x (time)2 distance = (1/2) x...
Imagine dragging a cat that is asleep. The cat is asleep and you are dragging it across the floor. In physics, you will learn that the friction force depends on two things: the weight of the cat and the atomic roughness of the floor. Now, imagine that same cat planting its feet and using its muscles to resist your mo...
Most likely, you are not following the proper order of operations as required in arithmetic. In an equation which involves addition (or subtraction) and multiplication (or division), you MUST do the multiplication and division FIRST, then you do the addition and subtraction. For example, in the equation: 2 + 6×3 – 10/...
When we observe stars, we can use the data we collect to calculate their brightness (called magnitude) and their temperature. If you plot those two number on a graph with temperature on the x-axis and brightness on the y-axis, you see that the data seem to gather in clumps (Figure 16.4 in the Physical Science course). ...
The time was not changed. We evaluated the equation. The equation is: distance = (1/2) x (9.8 m/sec2)x(1.2 sec)2 The exponent of “2” at the end of the equation means you must square 1.2 seconds. When you square 1.2 (which means taking 1.2 times itself), you get 1.44. When you square “seconds,” you get seconds squared...
In some very special cases, SHORT TERM exposure to higher levels of oxygen can do more good than harm. Some burn victims gain more in terms of healing than they lose in terms of their inner body. However, there have been experiments which clearly show that long exposure to high levels of oxygen is bad. When guinea pigs...