Which is a tool used by scientists to determine the composition of objects?

a hologram

a spectrometer

a wave front

a prism

Iron has a density of 7.9 g/cm3. How much mass is in a 10 cm3 sample of iron?

What kind of diet is best for a type two diabetes person?

A force of 75 n is applied to a spring, causing it to stretch 0.3 m. what is the spring constant of the spring?

An object has a velocity of 8 m/s and a kinetic energy of 480 J. What is the mass of the object? (Formula:) 7.5 kg 15 kg 60 kg 120 kg

If the time is 0.2 seconds and the speed is 1500m/s what is the distance

They are generally thought to be blank naturally occurring emotions that are present from birth

If an aircraft is loaded 90 pounds over maximum certificated gross weight and fuel (gasoline) is drained to bring the aircraft weight within limits, how much fuel should be drained?

3. Shortwave radio is broadcast between 3.50 and 29.7 MHz, To what range of wavelengths does this correspond? Why do you suppose this part of the spectrum is called shortwave radio?

How does a star's temperature change as the star ages from a main sequence star to a red giant and from a red giant to a white dwarf?

What factors in the atmosphere seem to have the greatest effect in the amount of radiation received from the sun?