When groups of atoms align their magnetic poles

Estimate the radiation pressure due to a bulb that emits 25 W of EM radiation at a distance of 7.5 cm from the center of the bulb. Assume that light is completely absorbed.

Blue light, which has a wavelength of about 475 nm, is made to pass through a slit of a diffraction grating that has 425 lines per mm and forms a first-order bright band. What is the angle of diffraction? Round answer to the nearest whole number.

Are bases chemically the same as acids true or false

An aircraft travels 1400 km at a speed of 700 km/h and then runs into a headwind that reduces its speed over the ground to 500 km/h for the next 800 km. What is the total time for the flight? What is the average speed?

What group is helium in? Group 2 or group 8?

What do you call a drug that increases speed

2. How is frequency described in mathematical terms?

During a summer with little rainfall, your house on a hill slope experiences an interval during which your well runs dry. You have to borrow water from your neighbor who lives downslope from you. Why does your neighbor have water when you don't?

If a force does not act parallel to the resulting displacement, what is the effect on the work done by the force?

A stick is a connection of two same - diameter metal rod 5 cm, and a length of both stick is 0,6m. The thermal conductivity of the first rod 92 cal / s. m.°C, and the second stick 50 cal / s. m.°C.