Which object is in static equilibrium? a rolling ball that has a net force acting on it a cruising car that has no net force acting on it a book that has no net force acting on it and is sitting on a table a vase that has a net force acting on it and is sitting on-a shelf
Choose examples of energy from the following options: A atoms B water C air D heat E electromagnetic radiation F movement
What type of materials absorb sound? sound insulators neither sound conductors
Question 22 of 30 22. Including reaction time the stopping distance is more than 20 feet at 10 miles per hour, at 20 miles per hour it will be about: Choose one a. 30 feet b. 63 feet c. 40 feet d. 75 feet
Fixed resistors have only one ohmic value that cannot be changed or adjusted. True False
Gold is the best natural conductor of electricity, followed by copper, silver, and aluminum. True False
A force that acts away from the center of mass is also called Centric Coplanar Force Couple Concentric Moment
If an engine cannot be 100% efficient, what happens to the energy that is lost? It reproduces. It still exists, but in a different form. It disappears.
#29 This is what happens when your vehicle starts to slide on a thin layer of water or other liquid between your tires and the road. a) Speeding b)Hydroplaning c) Defensive driving
In the Atkinson and Shiffrin modal model information can be lost by both decay and interference at each stage. True False
Which object has the most inertia? ping pong ball feather bowling ball
8. What factor determines if lightning bolts are classified as hot or cold? A. lightning's temperature B. lightning's brightness C. likelihood of starting a fire D. amount of heat given off
4. What is the voltage drop across a shorted parallel component in a series-parallel circuit? A Zero volts B The applied voltage It depends on total current D It depends on total resistance
A stabilized spin is not different from a stall in any element other than Speed Rotation G force
A rock thrown vertically upward from the surface of the moon at a velocity of $16m/sec$ reaches a height of $s=16t-0.8t^{2}$ meters in t sec. a. Find the rock's velocity and acceleration at time t. b. How long does it take the rock to reach its highest point? c. How high does the rock go? d. How long does it take the rock to reach half its maximum height? e. How long is the rock aloft? a. Find the rock's velocity at time t. $v=16-1.6tm/s$ Find the rock's acceleration at time t. $a=\square m/s^{2}$ (Simplify your answer. Use integers or decimals for any numbers in the expression.)
A weightlifter lifts an 120-kg barbell at a height of 2.4 meters above the ground. If it took 2.8 seconds to complete this lift, what was the weightlifter's power output in watts? Round to the nearest integer. $\square $
What is the value of the normal force if the coefficient of kinetic friction is 0.22 and the kinetic frictional force is 40 newtons? A. 8.8 newtons B. 40 newtons C. 80 newtons D. $1.8\times 10^{2}$ 8 x 10 newtons
What type of evidence would a UV light be used to detect? DNA only Firearms residue Latent prints or bodily fluids Bullet trajectories
What model states that particles of matter are always in motion?
