Mr. Polifka does a demonstration in science class. He holds an unlit match six inches above a candle flame. After a while, the match bursts into flame.

If the rotation period of the moon were to decrease, then: A:the frequency of lunar eclipses would decrease. B: the phases of the moon would take less time to change. C: the length of a day would decrease.

In most cases, a multicellular organism is not an exact copy of its parents because it

All nuclear energy results in the rapid release of energy, such as in atomic bombs. a. True b. False

Calculate the energy needed to heat 4 kg of water from 25°C to 45°C. heat = 80 Kcal 100 Kcal 180 Kcal 280 Kcal

Shining a beam of light on a metal has no effect. What change would be most likely to cause the ejection of electrons from the metal. Choose all that apply. Group of answer choices Increase the intensity of the light.

An object is undergoing shm with period 0.900 s and amplitude 0.320 m. at t = 0 the object is at x = 0.320 m and is instantaneously at rest. calculate the time it takes the object to go (a) from x = 0.320 m to x = 0.160 m and (b) from x = 0.

Your friend states in a report that the average time required to circle a 1.0-mi track was 49.325 s. This was measured by timing 10 laps using a stopwatch with a precision of 0.01 s. Do you believe his results are reliable? Explain.

The forklift exerts a 300.0 N force on the box and moves it 15.0 m into the air. How much work does the forklift do? A. 500 J B. 1.50 * 10^3 J C. 4.50 * 10^3 J D. 0.00 J

Why the room gets hot even we open the door of refrigerator?

What effect will taking a dose of antibiotics that is too small have on the bacteria you are trying to destroy? a. all of the bacteria will pass on their genes b. none of the bacteria will pass on their genes c.