Does volume change when liquid is heated? A decrease in temperature caused the water molecules to lose energy and slow down, which results in water molecules that are closer together and a decrease in water volume. When water is heated, it expands, or increases in volume. As water cools, it contracts and decreases in volume. […]
What affects period of a spring?
What affects period of a spring? The period of a spring-mass system is proportional to the square root of the mass and inversely proportional to the square root of the spring constant. What is the formula for oscillation? The period formula, T = 2π√m/k, gives the exact relation between the oscillation time T and the […]
What is the correct configuration of calcium?
What is the correct configuration of calcium? [Ar] 4s² What is the SPDF configuration of calcium? Atomic number Z and the element name and chemical symbol Electron configuration Electron arrangement s, p, d & f notation with electron number superscripts (plus some simplified electron arrangements) 20 Calcium, Ca 1s22s22p63s23p64s2 (2.8.8.1) 21 Scandium, Sc 1s22s22p63s23p63d14s2 22 […]
Why do some object float and others sink?
Why do some object float and others sink? Why do some things float and other things sink? It depends on the density of the object. Density is a measure of both how massive those molecules are, and how closely packed together they are. If the object’s total density is greater than that of water, it […]
How many pushups should I do by age?
How many pushups should I do by age? Table: push-up test norms for MEN Age 17-19 20-29 Above average 35-46 30-39 Average 19-34 17-29 Below average 11-18 10-16 Poor 4-10 4-9 How is body strength calculated? 5 Tests That Will Measure Your Strength TEST 1: THE 3-MINUTE PUSHUP TEST. Devised by Martin Rooney, creator of […]
How long have seatbelts been mandatory?
How long have seatbelts been mandatory? 1968 Do cops wear seatbelts? While 86 percent of Americans now wear seat belts, an upcoming study that will be published by California’s Commission on Peace Officer Standards and Training estimates that roughly half of law enforcement officers don’t wear them. What year car doesn’t need seat belts? 1966 […]
When you jump from an elevated position you usually bend?
When you jump from an elevated position you usually bend? When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. When a rifle is fired the bullet moves forward […]
What happens to the force of attraction when?
What happens to the force of attraction when? Hence force of attraction will be quadrupled. (1) When distance between objects is doubled, force of attraction will become 122=14 times i.e. will become one-fourth. (3) When distance between objects is halved, force of attraction will become 1(12)2=114=4 times i.e. will become four times. How many G’s […]
What is unusable energy called?
What is unusable energy called? In every energy transfer, some amount of energy is lost in a form that is unusable. In most cases, this form is heat energy. Thermodynamically, heat energy is defined as the energy transferred from one system to another that is not doing work. Entropy is a measure of randomness or […]
How do you describe a distance time graph?
How do you describe a distance time graph? If an object moves along a straight line, the distance travelled can be represented by a distance-time graph. In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the […]