ENERGY AND FORCES UNIT TEST CONNECTIONS ACADEMY
Please help!!!
1. A model shows a machine that works using electrical fields. What would this machine need for the electrical field to function properly? (1 point)
springs, to store potential energy
at least two charged, interacting parts
moving parts, for kinetic energy
all neutral components
2. Where do the forces that make atoms interact come from?(1 point)
from the electric fields of neutral molecules
from the electric fields of charged subatomic particles
from the electric fields of neutral subatomic particles
from the electric fields of charged molecules
3.Which diagram would represent kinetic energy and launched particles?(1 point)
an arrow drawn on a bow, with the bow string pulled back
an arrow released from the bow
an arrow released and stuck in a target
an arrow being strung on a bow, with the bowstring straight
4. During chemical reactions, bonds between atoms break and form. What does this mean in terms of subatomic particles?(1 point)
Electrical fields of charged particles interact, bonding those with the same charge.
Electrical fields of neutral particles interact, bonding those with opposite charges.
Electrical fields of neutral particles interact, bonding those with the same charge.
Electrical fields of charged particles interact, bonding those with opposite charges.
5.What is the driving force behind chemical reactions between elements?(1 point)
the attraction of electrons of different atoms
the attraction of protons of different atoms
the interaction of the electric fields of neutrons and electrons
the interaction of the electric fields of protons and electrons
6. The north and south poles of two magnets are attached to each other. A student pulls the poles apart and hold them at a distance of 10 cm. How does the energy stored in the system change?(1 point)
The energy stored in the system does not change.
The energy stored in the system decreases.
The energy stored in the system first increases and then decreases.
The energy stored in the system increases.
7. A student places two horseshoe magnets next to each other, and the poles of the magnets attach to each other. How does the kinetic energy of the system change?(1 point)
Kinetic energy increases because the magnets move in the direction of the field.
Kinetic energy decreases because the magnets move in the direction of the field.
Kinetic energy increases because the magnets move in the opposite direction of the field.
Kinetic energy decreases because the magnets move in the opposite direction of the field.
8. A giant magnet moves above a debris pile with many pieces of iron buried in it. Which statement is correct about the energy stored in the magnetic field? (1 point)
Iron pieces accelerate toward the magnet, and the energy stored in the system increases.
Iron pieces accelerate away from the magnet, and the energy stored in the system increases.
Iron pieces accelerate away from the magnet, and the energy stored in the system decreases.
Iron pieces accelerate toward the magnet, and the energy stored in the system decreases.
9. The north pole of a bar magnet is moved close to the north pole of another bar magnet that is suspended by a thread. How does the energy stored in the magnetic field change?(1 point)
The energy stored in the field decreases because the magnet moves in the direction of the field.
The energy stored in the field increases because there is no friction.
The energy stored in the field increases because the magnet moves in the direction of the field.
The energy stored in the field decreases because there is no friction.
10. Two magnets with like poles facing each other are brought close to each other and then released. How does the energy stored in the system change? (1 point)
The energy stored increases and then decreases.
The energy stored decreases and then increases.
The energy stored increases.
The energy stored decreases.
Answers: 1
Physics, 21.06.2019 22:00
1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?
Answers: 2
Physics, 22.06.2019 10:50
If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.
Answers: 3
Physics, 22.06.2019 22:30
The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s
Answers: 2
Physics, 23.06.2019 08:00
Describe a mesomorph body type and expain why this body type a sportsperson to perform well in either football swimming or cross country
Answers: 1
ENERGY AND FORCES UNIT TEST CONNECTIONS ACADEMY
Please help!!!
1. A model shows a mach...
1. A model shows a mach...
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