What is a system that does not exchange matter or energy with the environment? open system closed system conductive system thermal system
The concept of space-time compression means A) there is more space in smaller places than ever. B) distant places in the world are becoming effectively closer together. C) people no longer have time to read books. D) as an object moves faster through space, time slows for that object. E) today it is harder than ever to keep track of what is happening in distant places.
Light (electromagnetic radiation) and heat are classified as forms of matter. True False
A bicyclist, traveling with a constant speed, covers 89.0m in 730s. Determine all unknowns. bar (v)=square unit Delta x=square unit t=square square unit
Multiple Choice Question How might a container change if the substance inside of it undergoes a change in pressure? It might pop if the pressure decreases and might appear crushed if the pressure increases. It might appear crushed if the pressure decreases or increases. It might pop if the pressure decreases or increases. It might appear crushed if the pressure decreases and might pop if the pressure increases.
Answer the following questions to test your knowledge. Name the three things that affect centrifugal force. Mass, energy, vector Energy, radius, velocity Mass, speed, radius of turn
Answer the following questions to test your knowledge. Which road condition makes for more friction? Dry and sticky Snowy and wet Oily and slimy
Pop Quiz Answer the following questions to test your knowledge. What happens when you use a lower gear when driving downhill? It helps you to steer better. It helps to control your speed. It wears your brakes down quicker.
Para enfriar un trozo de cristalería caliente debes colocarlo en agua fría. falso cierto
When adding or subtracting measured quantities, what determines the number of significant figures in the result?
4. Provide evidence from the experiment that an object's motion depends on the forces acting on it and its mass.
The period and frequency of a wave are directly related. OTrue False
70. II A cubical box 20 cm on a side is constructed from 1.2-cm- thick concrete panels. A 100 W lightbulb is sealed inside the box. What is the air temperature inside the box when the light is on if the surrounding air temperature is $20^{\circ }C$
Strain and deformation are basically the same thing because it pertains to length. True False
33. II A $10m\times 14m$ house is built on a 12-cm-thick concrete slab. What is the heat-loss rate through the slab if the ground tempera- ture is $5^{\circ }C$ while the interior of the house is $22^{\circ }C$ ?
A sprinter runs at a constant speed of 8.0 meters per second on a circular track that has a radius of 40.0 meters. Part 1 What is the centripetal acceleration of the sprinter? $0.20m/s^{2}$ $0.40m/s^{2}$ $1.6m/s^{2}$ $5.0m/s^{2}$
Part 2 If the radius of the circular track is halved, what happens to the magnitude of centripetal acceleration of the sprinter? It doubles. It quadruples. It is reduced four times. It remains the same.
When bounce passing where should the ball bounce? Closer to the passer who threw the ball Closer to the person receiving the ball In the middle of both people Doesn't Matter
Why is a larger Newton's cradle less successful? The larger it is the more energy is transferred and transformed The larger it is the less energy is transferred and transformed
8) Which decay type does not change the mass number of the atom? Alpha decay Beta decay Both alpha and beta Neither alpha nor beta
