Why is random sampling and random assignment in experimental research important?

Tamika inflates and ties off a balloon in her classroom and then takes it outside on a cold, winter day. Immediately, she notices that the balloon has gotten a little bit smaller. Why does this occur?

A 0.500-kg potato is fired at an angle of 80.0° above the horizontal from a PVC pipe used as a "potato gun" and reaches a height of 110.0 m. (a) Neglecting air resistance, calculate the potato's velocity when it leaves the gun.

If the current and the resistance in a circuit both double, what will happen to the voltage? A. stays the same B. doubles C. halves D. quadruples E. decreases by a factor of 4

Which particles make up the nucleus of an atom? A. protons and electrons B. neutrons and electrons protons only protons and neutrons E. neutrons only

Magine a satellite is orbiting the moon. How would the satellite behave if the moon were to suddenly disappear? A) The satellite would stop moving. B) The satellite would continue to move in its orbital path.

What is the effect of the magnetic field on the protons? View Available Hint (s) What is the effect of the magnetic field on the protons? The protons are accelerated to the left, toward the S magnetic pole.

following statement supports which theory? "Astronomers have observed protoplanetary disks around distant newborn stars." Big Bang theory Nebular theory Cell theory String theory

For radio broadcast, sound signals are converted to a. ultraviolet waves. b. infrared waves. c. visible light waves. d. electromagnetic waves.

a roller coaster is hard to stop because it has a lot of inertia. Use Newton's first law of motion to explain why you feel tossed around whenever a roller coaster goes over a hill and through a loop.

Is balancing an egg on the equinox science or pseudoscience