Which of the following describes forces? They can be touched. They can be seen on sunny days. They can change motion.
Once triggered, the gate of the __ loses control of the current flow and it will keep conducting. triac SCR both A and B
If you continued to heat a pot of water after it reached its boiling point, what would happen? A. Its temperature would rise above 100^circ C B. Its temperature would drop below 100^circ C C. Its temperature would stay at 100^circ C D. Its temperature would rise above 100^circ C then slowly drop.
The highest tides occur when the __ Earth and Sun are lined up Earth and Moon are lined up and the Sun is at a 90-degree angle Earth and Moon are lined up Sun and Moon are lined up Earth, Sun, and Moon are lined up
110. Related with the radiant energy it is current to say: It is energy in form of electromagnetic waves. It is energy in form of a flow of photons. It is expressed or measured in Joules. All of the above.
What radius must the sphere have so that the acceleration due to gravity at the Earth's new surface would equal the acceleration due to gravity at the surface of the Sun? Express your answer using three significant figures and include the appropriate units. R=Value Units
The search for exoplanets is challenging because of a number of constraints Which of the following is not a constraint? Choose one: A. the distance to exoplanetary systems B. the orbital periods of many exoplanets C. the existence of appropriate Sun-like stars D. the orientation of many planetary orbits in relation to their star E. the proximity of planets to their star
The angular displacement by which the voltage and current are out-of phase with each other is referred to as __ a. the angle theta b. the current angle c. the power angle d. the voltage angle
How can we describe the relationship between volume and matter? A. Volume is not generally measured. B. Volume is unchangeable in most types of matter. C. Volume is more changeable in liquids than gases. D. Volume changes with changes in temperature.
__ 1. True or False:A negative charge exists on a body that loses free electrons. __ 2. What units are used to measure electric field strength? __ 3. When drawing electric lines of force, what direction does __ the charge flow? __ __ 4. What term is defined as the amount of work done when a unit positive charge is transported from the ground to a particular point and no further? __ 5. Write the equation for potential difference relating the work done to the unit of charge. __ 6. Where on a solid object is static charge most concentrated? __ __ __ 7. What is the name given to lines that connect points with the same potential? Define the following term. 8. induction- Briefly answer the following essay question. 9. What is the relationship between force and distance in Coulomb's law of electric force?
$\square $ Answer Bank KE: 1000.0 J PE: 3000.0 J KE: 0J $PE:4000.0J$ KE: 2000.0 J PE: 2000.0 J KE: 4000.0 J PE: 0J
Learning Log: How do you think you get something to have more kinetic energy?
If a UV light unit has four lamps in it, and each lamp is 7-watt, it is known as a __ 7-watt unit 28-watt unit 11-watt unit 3-watt unit
10. What is the mass of a meteorite that is traveling towards Earth at $1,760m/s$ with a momentum of $33,400kgm/s$
Where is the energy coming from in the lab (where does it start)? A Potential energy in the Cheeto B Potential energy in the water C Kinetic energy inside the water D Kinetic energy in the Cheeto
What should happen to the temperature of the water? A It stays the same B It goes down C It goes up
9. Your local weather report announces that the barometric pressure is 30.44 inHg. Convert this pressure to psi, atm torr, and Pa.
Express the temperature, 275.18 K in degrees Celsius. $548.33^{\circ }C$ $274.17^{\circ }C$ $2.03^{\circ }C$ $120.88^{\circ }C$ $22.78^{\circ }C$
Hubble's Law has led physicists and astronomers to the hypothesis that the universe is expanding. True False
Newton determined that the force of gravity on an object is proportional to its mass causing its mass to be canceled out (Newton's second law) and resulting in a constant acceleration. If the laws of physics are universal, then Newton should be able to apply his discoveries about gravity on Earth to the motion of the planets in our Solar System. Newton's third law says that for every force there is an equal reaction force in the opposite direction. What does this imply about the force of gravity associated with a person standing on the Earth? Choose one: A. The force of gravity on the person cancels out to zero. B. The Earth's gravity pulls downward on the person but also pushes upward on them. C. The Earth's gravity pulls downward on the person, and the person's gravity pulls upward on the Earth. D. There is twice as much gravitational force on the person than there would be if it weren't for Newton's third law.
