Questions and answers by

kali

Questions (608)

Andrea is building a birdhouse. She hammers a nail in the wrong place and needs to remove it. She uses the back of her claw
1. 1 answer
2. 245 views
Andrea is building a birdhouse. She hammers a nail in the wrong place and needs to remove it. She uses the back of her claw
1. 1 answer
2. 228 views
Tito and Michael put 1200 joules of work into pushing a box up a ramp, but only 300 joules of work is output for moving the box.
1. 1 answer
2. 211 views
Which of the following directly affects the strength of an electromagnet?a Length of core, type of force b Type of force, number
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2. 111 views
Which of the following would decrease the flow of current through the lights in the circuit shown above?a Decreasing the battery
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2. 159 views
Crystal's class is studying parallel circuits. The teacher asks what will happen if one of the light bulbs break in a parallel
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2. 182 views
Which of the following determines if a material is a conductor or an insulator?a number of electrons b number of protons c
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2. 168 views
n a parallel circuit with three lights on it, one light breaks. What happens to the intensity of the other two lights?a they get
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2. 127 views
The drawing shows a student holding two negatively charged balloons.What is most likely to occur if the student brings the
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2. 265 views
Sam, an electrician, wraps a copper wire with a thick plastic coating. What is he most likely trying to do?a keep a current from
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2. 161 views
The diagram shows a wooden racetrack with a 500-g car positioned at the top of a slope.Which energy conversion takes place as
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2. 177 views
Match each description or drawing to the correct part of a circuit.Column A Column A 1. Any device that uses electrical current
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2. 181 views
The surface of a heated metal object measures 120°C. It is dropped into a bucket filled with water measuring 10°C.Which of the
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2. 231 views
The mechanical advantage of a wheel and axle is the radius of the wheel divided by the radius of the axle.What is the mechanical
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2. 164 views
The mechanical advantage of a wheel and axle is the radius of the wheel divided by the radius of the axle.What is the mechanical
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2. 119 views
Three light bulbs are connected in a series, as shown in the diagram.After the circuit is completed, the middle light bulb
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2. 174 views
A car radio with a resistance of 15 ohms draws a current of 0.87 amperes. What is the voltage of the car battery?a 13 volts b
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2. 200 views
What is another name for an object that uses up the electrical energy in a circuit?a Battery b Wire c Load d Source
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2. 154 views
How does increasing the distance between charged objects affect the electric force between them?a The electric force decreases
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2. 155 views
An electric flashlight can be charged by turning a crank. Identify the types and order of energy changes happening.a Mechanical
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2. 250 views
A 12-V battery is connected to a light bulb with a resistance of 2Ω. What is the current in the circuit? **You must show all
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2. 139 views
The relationship between voltage (V), current (I), and resistance (R) is shown in the equation.V=IR What happens to the current
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2. 129 views
If the distance between two objects is doubled, what happens to the gravitational force between them?a it decreases to 1/2 of
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2. 124 views
Which of the following statements regarding electric insulators is correct?a Electric insulators are good heat conductors. b
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2. 200 views
Which is NOT an advantage of a series circuit?a They are circuits so that if one section of the circuit fails, the whole circuit
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2. 232 views
Using Coulomb's Law, if the size of one of the charges increases (and the distance remains the same), what happens to the
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2. 198 views
For a class project, Jerome builds a simple circuit with a battery and three light bulbs. On his way to school, Jerome drops his
1. 0 answers
2. 225 views
Avery is experimenting with a simple circuit. She measures the current in the circuit three different times with a different
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2. 161 views
What is the energy conversion that happens inside a battery?a Electrical Energy to Kinetic Energy b Chemical Energy to
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2. 170 views
Salt water is a good conductor. When salt is dissolved in water, which of following explains why it becomes a good conductor?a
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2. 247 views
Match the vocabulary word to its definition.Column A 1. electric force: electric force 2. electric charge: electric charge 3.
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2. 225 views
Match the vocabulary word to its definition.Column A Column A 1. conductors: conductors 2. insulators: insulators 3. resistance:
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2. 183 views
Question 3Which of the following materials are good conductors? (Select all that apply) a plastic b rubber c gold d copper
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2. 166 views
Which of the following materials is considered an insulator? (Select all that apply)a rubber b gold c wood d silver
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2. 130 views
In which kind of material is charge most easily transferred?a insulators b semiconductors c train conductors d nonconductors e
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2. 173 views
What is the relationship between voltage and current (assuming the resistance stays the same)?a If the voltage decreases, the
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2. 155 views
The diagram shows two circuits.Which statement correctly describes each circuit? a The bulbs in both circuits are connected in
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2. 157 views
Imagine a string of holiday lights, with many bulbs connected to each other by wires. One bulb burns out, causing the bulbs next
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2. 141 views
What three factors affect electric force? Choose all that applya potential kinetics of two objects b the distance between two
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2. 220 views
Match the property to its unitColumn A 1. Current: Current 2. Resistance: Resistance 3. Voltage: Voltage Column B a.Volts
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2. 154 views
Match the scenario to the type of interaction between the particles.Column A 1. Two positive charges are place close together:
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2. 304 views
Which of the following would be considered a load in a circuit?a lightbulb b wire c battery d switch
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2. 245 views
What happens to the current flowing through a circuit as resistance increases?a It reverses direction b It stays the same c It
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2. 132 views
Which circuit will stop producing light if one bulb burns out?a Circuit 1 b Circuit 2 c Circuit 3 d Circuit 4
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2. 236 views
What must an object gain or lose to become electrically charged?a electrons b protons c nucleus d neutrons
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2. 105 views
What is mechanical advantage?a The number of times the machine adds the effort force b The number of times the machine multiples
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2. 143 views
What are the two factors that affect the force of gravity between two objects?a Mass and matter b Distance and mass c Distance
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2. 125 views
What causes hot air to rise from the pavement on a hot summer day?a radiation b convection c insulation d conduction
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2. 292 views
What type of energy transformation is occurring when a lamp is plugged into an outlet?a mechanical to electrical b electrical to
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2. 134 views
Which of the following are characteristics of a good conductor? (Select all that apply.)a Resists the flow of electrons b Poor
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2. 156 views
In which kind of material is charge most easily transferred?a nonconductors b train conductors c semiconductors d conductors e
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2. 147 views
The current running through a circuit is 10 amps from a 5 V battery. Calculate the resistance.a 2 Ohms b 50 Ohms c 0.5 Ohms d
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2. 159 views
The diagram shows two circuits.Which statement correctly describes each circuit? a The bulbs in both circuits are connected in
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2. 167 views
magine a string of holiday lights, with many bulbs connected to each other by wires. One bulb burns out, causing the bulbs next
1. 1 answer
2. 139 views
What three factors affect electric force? Choose all that applya amount of charge b potential kinetics of two objects c whether
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2. 342 views
Match the property to its unitColumn A 1. Current: Current 2. Resistance: Resistance 3. Voltage: Voltage Column B a.Ohms b.Volts
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2. 131 views
Match the scenario to the type of interaction between the particles.Column A 1. Two positive charges are place close together:
1. 7 answers
2. 187 views
What happens to the current flowing through a circuit as resistance increases?a It reverses direction b It stays the same c It
1. 1 answer
2. 238 views
What must an object gain or lose to become electrically charged?a nucleus b electrons c protons d neutrons
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2. 213 views
Use the word bank to complete the following paragraph. **Some words may not be used**There are two types of circuits: series
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2. 183 views
What is mechanical advantage?a The number of times the machine multiples the effort force b None of the above c The number of
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2. 144 views
What are the two factors that affect the force of gravity between two objects?a Mass and matter b Weight and mass c Distance and
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2. 116 views
Order the points on the image from lowest to highest potential energy.Reorder answers 1.Point C Reorder answers 2.Point B
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2. 179 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
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2. 239 views
What causes hot air to rise from the pavement on a hot summer day?a insulation b conduction c radiation d convection
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2. 201 views
Using the information from the video, and after exploring the Intro section of the Circuit Construction Kit: DC PhET - MATCH the
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2. 153 views
Using the information from the video, and after exploring the Intro section of the Circuit Construction Kit: DC PhET - MATCH the
1. 0 answers
2. 194 views
If the wavelength of a wave is 4 m, and the wave velocity is 8 m/s, then the frequency is _______?Use the equation below! a 8 Hz
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2. 116 views
What is the wavelength of a 20 Hz periodic wave moving at 40 m/s?Use the equation below! a 2 m b 800 m c 0.5 m d 80 m
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2. 212 views
Frequency and wavelength have a _____________ relationship.a good b inverse c bad d direct
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2. 225 views
The greater the frequency the ______________________ the wavelength.a lesser b greater c more d higher
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2. 280 views
Which part of the wave is labeled B?a amplitude b wavelength c crest d trough
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2. 230 views
What part of the wave is labeled A?a amplitude b wavelength c crest d trough
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2. 131 views
A longitudinal wave moves:a up and down b in a s-wave motion c left and right horizontal in direction d all of the above
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2. 258 views
A longitudinal wave has ___________sections, where the waves are compact, and __________ sections, where the waves are spread
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2. 458 views
In a transverse wave, the medium vibratesa at right angles to wave velocity b parallel to wave velocity c in a circle around the
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2. 171 views
In a transverse wave, the vibration is ____________ to the direction the wave moves.a parallel b perpendicular
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2. 196 views
Which of the following would NOT be an example of a longitudinal wave?Teacher: What is a longitudinal wave Me: - Matrix Morpheus
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2. 317 views
Light travels:a in curves b in bendy lines c in straight lines d around corners
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2. 183 views
Refraction is:a when light passes straight through an object b when light is stopped by an object c when light reflects off of
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2. 160 views
The angle of reflection is:a opposite to the angle of incidence b 180 degrees to the angle of incidence c equal to the angle of
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2. 180 views
Waves are _________.a matter b forces c vibrations d particles
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2. 201 views
What do waves transfer?Transfers - Metro Transit a energy b vibrations c particles d matter
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2. 156 views
Tom stands in a swimming pool and notices that the water around his feet is a lot cooler than the water near the surface. Which
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2. 126 views
When a flashlight is turned on, energy is transformed from light energy TO chemical energy in the flashlight.True False
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2. 146 views
Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of
1. 1 answer
2. 179 views
Identify each description or picture as an insulator or conductor of heatColumn A 1. A material that allows thermal energy to
1. 1 answer
2. 164 views
Which object has the highest amount of potential energy?a Book A b Book B c Book C d Not enough information
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2. 140 views
How does the pulley make work easier?a It changes the mass of the piano, making it easy to raise b It changes the amount of
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2. 182 views
Heat sponataneously flows from a cooler object to a warmer object.True False
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2. 179 views
Which of the following statements best explains why there is no change in temperature once thermal equilibrium between two
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2. 200 views
A rock is taken from the Moon back to Earth. Which of the following correctly describes the changes to its mass and weight?a Its
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2. 179 views
Which statement BEST explains how the iron uses energy?a The iron transforms sound energy into mechanical energy. b The iron
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2. 172 views
Ansley has a large bowl of ice cream for dessert. She places a metal spoon into the ice cream. It is the handle of the spoon
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2. 129 views
Use the passage to answer the question.Which movement's ideas are best expressed by this passage? Responses liberation theology
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2. 163 views
True or False: Two of the biggest challenges for improvement in developing African nations are high population growth and lack
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2. 196 views
The Organization of American States would address which of the following?Responses how to deal with regional health crises how
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2. 220 views
Mother Teresa's work in ________ has inspired reform throughout the world.Responses service to the poor service to the poor
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2. 186 views
The Green Revolution benefits ____ the most.Responses child laborers child laborers owners of large farms owners of large farms
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2. 182 views
The family planning initiatives in China and India served what purpose?Responses promoting communist indoctrination promoting
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2. 219 views