c. A2kg object moving East at a velocity of 21 meters per second strikes a 20 kilogram object that was at rest. After the collision the 2 kg object moves east with a velocity 1m/s and the 20 kg object moves east with a velocity of 2m/s What is the total momentum of the system before collision.^2 What is the total momentum of the system after the collision.
Which of the following surfaces can cause a loss of traction? Wet pavement Gravel roads Icy pavement All choices are correct
When you double the voltage in a simple electric circuit you double the Resistance Current Both of the above Neither of the above
Selecting from milligram gram, kilogram, and tonne determine the best unit of measure to express the weight of a pen? Choose the correct answer below. Grams Milligrams Kilograms Tonnes
9) What type of skid occurs when your front tires lose contact with the road surface? a) Spin-out b) Understeer c) Oversteer d) Four-wheel
How many significant figures are in the following number: 57,030 joules? 2 3 4 5
What condition or conditions are necessary for rotational equilibrium? A) sum Fx=0 B) sum Fx=0,sum T=0 C) sum T=0 D) sum Fx=0,sum Fy=0
Once food has been heated, hold it at 135^circ F or warmer. A. True B. False
Wind turbines are designed to carry out which type of energy transformation? A. Kinetic energy to sound energy, B. Gravitational Potential energy to electrical energy C. Electrical energy to light energy, D. Kinetic energy to electrical energy
A sound wave with an intensity of 25W/cm^2 is totally reflected. The intensity reflection coefficient is: 100% 50W/cm^2 25% 25W/cm^2
Fire the catapult at the lowest cup position What is the distance achieved? About 635 About 357
If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done? compression work radiation energy creation
Which word or phrase best describes entropy? disorder order kinetic energy force
What are most semiconductors made from? aluminum copper iron silicon
At which temperature does all molecular motion stop? OR $0^{\circ }C$ OK $0^{\circ }F$
Which statement about the volume and pressure of a gas is the most accurate? Volume of a gas is directly proportional to pressure of that gas in any container. Volume of a gas is inversely proportional to pressure of that gas in any container. Volume of a gas is always greater than pressure of that gas in any container. Volume of a gas is equal to pressure of that gas in any container.
CER: Make a claim about which type of material (dark or light)increases in temperature more when exposed to light energy Use evidence and scientific reasoning from class to support your answer. Your answer
In a transverse wave the wavelength can be measured as the distance between two adjacent compressions. TRUE FALSE
The slope of a linear velocity vs time graph tells us the __ of the object. displacement velocity speed acceleration
What is the first nucleus of an atom shown as? a fuzzy cloud a mass of protons and neutrons a solid mass surrounded by electrons a mass of protons
