How many years does it take for 1/4 of a carbon-14 atom to decay?

During your winter vacation, you enter a "dogsled" race across a frictionless frozen lake, in which the sleds are pulled by students instead of dogs.

Calculate the diffraction limit of the human eye, assuming a wide-open pupil so that your eye acts like a lens with diameter 0.8 centimeter, for visible light of 500-nanometer wavelength.

2. What is a transformer? Explain how a transformer works including specific details on step up and step down transformers.

What is the lateral surface area of a cylinder with height of 7 m and a base diameter of 4 m (to the nearest whole number) ?

You've already gathered data to measure the relationship between reading skills and extroversion. Now, you look at the data to determine if reading skills and extroversion have a negative or positive correlation.

What change occurs to the mass of an object when an unbalanced force is applied to it? A. The mass increases. B. The mass decreases. C. The mass remains the same. D. The mass reduces to zero. E. The mass changes by an indeterminate amount.

The equilibrium price will rise, but equilibrium quantity may increase, decrease, or stay the same if a. demand increases and supply decreases. b. demand increases and supply increases. c. demand decreases and supply increases. d.

The nearest large galaxy to our own is about 2.5 million light-years away. how many meters is that

An automobile travels on a straight road for 25 km at 32 km/h. it then continues in the same direction for another 25 km at 64 km/h.

Why is it important for engineers to design bumper cars safely