once a hypothesis is tested an confirmed and then tested again and confirmed again by many others, it may provide the basis for, or become a part of, a what?

Which of the following is a vector quantity? a. displacement b. luminosity (brightness) c. mass d. temperature

A thin layer of gasoline floating on water appears brightly colored in sunlight. From where do the colors come? 1 ... the interference of light waves reflected from the opposite surfaces of the gasoline film 2.

A projectile is fired into the air at a nonzero angle with the horizontal. When the projectile reaches its maximum height, the speed of the projectile is 21.5% of its original speed. What angle was the projectile originally fired at?

A 12.0 V battery is connected to two resistors in series: R1 = 12.00 , R2 = 4.00 .

A skier on a hill has 4000J of kinetic energy and 3000J of potential energy. After sliding down the hill a ways, their potential energy is 2000J.

A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A passenger feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. If r = 17.

A mass spectrometer accelerates doubly ionized atoms of charge 2e over a potential difference V before they enter a uniform magnetic field B which is perpendicular to the direction of motion of the ions.

A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120 m starts from rest and accelerates at 30.

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched