Friction plays a minimal role in torque application accounting for only 10% of the total torque. Select one: True False
4. A 50 gram piece of iron warms from 0^circ C to 40^circ C while absorbing 900 joules.What is the specific heat of iron?
What happens to a normally open timed contact when voltage is applied to the coil of an off-delay timer? The contact changes immediately from open to closed. There is an immediate heating of the transformer. The contact changes immediately from closed to open. There is an immediate cooling of the transformer.
What determines whether water is solid, liquid, or gas? Choose all that apply. the container in which it is held the humidity of the surrounding air the speed at which the molecules move the distance between the molecules
Forces between particles Increase as the particles move faster and farther apart. __ True False
Particle motion in ice Is square than particle motion in water.
Adding thermal energy to a cup of water can cause particles to do which of the following? Select all that apply. A) move faster B) get farther apart C) move slower D) remain constant E) get closer together
15. The heaviest broccoli on record has a mass of 15.87 kilograms. How does the value of the 5 in the mass of the broccoli compare with the 5 in the mass of the mango above?
When measuring distance between two points, a __ would be the correct lab equipment to use. metric ruler spring scale graduated cylinder ) triple beam balance
Which SI unit for length is greater than a meter? a centimeter b kilometer C millimeter d decimeter
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
