You don't have any matches, so you want to focus sunlight to ignite a pile of twigs for a campfire. Which mirror would be best to use? A.convex mirror B.concave mirror C.flat mirror D.plane mirror
Which type of energy increases when you compress a spring? A) elastic potential energy B) kinetic energy C) radiant energy D) sound energy
If astronaut A(90kg) and astronaut B(110kg) are linked by 9.5m of rope and the centre of mass is 5.2m from astronaut A. What is the velocity of the 2 astronauts?
How does an insulator stop the flow of an electric current? A. Insulators have too many electrons. B. Insulators have a positive charge so they absorb electrons. C. Electrons in an insulator do not move readily. D. Insulators convert electric energy to other forms of energy.
The space shuttle is located exactly half way between the earth and the moon. Which statement is true regarding the gravitational pull on the shuttle? A) The moon pulls more on the shuttle. B) The earth pulls more on the shuttle. C) Both are equal due to equal distances. D) Both are equal due to the mass of the shuttle.
Which planet has a thin atmosphere mainly composed of carbon dioxide A.Mercury B.Earth C.Mars D.Venus
Which of the following is the best definition of viscosity? A. the tendency of a fluid to support a floating object B. the ability of a fluid to transmitted a force C. the thickness of a fluid, or its resistance to flow
Why does a light go out when you turn off the wall switch? A. The switch changes the direction of the flow of electrons. B. The switch causes a break in the circuit. C. The switch changes the circuit from series to parallel. D. The switch absorbs the electrical energy. would B be the correct answer?????????
