Category: Physics

What is the rule for adding and subtracting sig figs? When you add or subtract, you assign significant figures in the answer based on the number of decimal places in each original measurement. When you multiply or divide, you assign significant figures in the answer based on the smallest number of significant figures from your […]

What is the profile of soil? A soil profile is a vertical section of soil like the diagram above. It allows you to examine the structure of soil. A soil profile is divided into layers called horizons. Most important for plant growth, the A and B horizons are the top two layers of the soil. […]

Is it true that white blood cells prevent the loss of blood by causing clotting? White blood cells—including neutrophils, monocytes, lymphocytes, eosinophils, and basophils—are involved in the immune response. Platelets form clots that prevent blood loss after injury. Is it true that each lung is fed oxygen by a separate bronchus? It is TRUE that […]

Where is rich in ozone? Most ozone (about 90%) is found in the stratosphere, a region that begins about 10-16 kilo- meters (6-10 miles) above Earth’s surface and extends up to about 50 kilometers (31 miles) altitude (see Figure Q1- 2). Where is skin the thickest? Epidermis varies in thickness throughout the body depending mainly […]

What are some big picture questions? 7 Big Picture Life Questions What kind of person do you want to be? What do you want to contribute in life? What do you want to accomplish in life? (note the difference between these two questions!) What kind of relationships do you want to have? How do you […]

What element has 40 protons and 53 neutrons? Zirconium – Element information, properties and uses | Periodic Table. What if there were no electrons? You would become plasma as there are no electrons to form molecules. You wouldn’t exist unless you were plasma. Meaning you would die. Nothing other than plasma would exist in such […]

Can a vector have a component equal to zero? Yes, a vector can have a component equal to zero and still have a nonzero magnitude. What is Cartesian form of vector? We know that = xi + yj. The vector , being the sum of the vectors and , is therefore. This formula, which expresses […]

What is the last step in design process? Test and Redesign The design process involves multiple iterations and redesigns of your final solution. You will likely test your solution, find new problems, make changes, and test new solutions before settling on a final design. For detailed help with this step, use these resources: Test and […]

What is the main cause of volcanic activity? Volcanoes erupt when molten rock called magma rises to the surface. Magma is formed when the earth’s mantle melts. If magma is thick, gas bubbles cannot easily escape and pressure builds up as the magma rises. When the pressure is too much an explosive eruption can happen, […]

Do monitors use a lot of power? A 3 Watts average across 20 monitors per year is not nothing. Monitors typically have 3 power levels: On — you’re looking at one. Given that the average North American household uses about 1000 kWh/month, if your monitor were in actual use all month (720 hours) at 40 […]