physics Flashcards
two energy stores
kinetic, thermal
what is the potentiak difference between live wire and the neutral wire
230
when the beater speed increases the current in the whisk increases because the resistance of the whisk?
decreases
explain how irradiating the water affected the hazard caused by the drinking water
iradiation means open to radiation.
it exposes the water to radiation
this would reduce hazard as it kills bacteria in the water
explain how conatminating the water affected the hazard caused by the drinking water
significantlky increases the hazard because it contaminates the water with isotopes.
how many neutrons in gold atom?
118
explain how the motion of the particles in warmer air causes an increases in the power transferred to the turbine
particles have more kinetic energy due to the increased temperature on warmer air so it results in faster-moving air molecules When this faster-moving, higher-energy air flows toward a turbine, it causes the turbine blades to rotate more forcefully and quickly.
explain what happens to current in led when the potenital differnce across the led is negative?
When the voltage across an LED is negative, the LED is in the wrong direction to light up, so no current flows through it. LEDs only allow current to flow one way (when the positive side is connected correctly)
what does an alpha particle consist of?
2 protons and 2 neutrons
after the drone was launched it moved at a constant speed and gained height.
the thermal stores of the energy of the drone increased.
Describe two other changes of the energy stores of the drone as it moved at a constant speed and gained height
Gravitational potential energy increases as the drone gains height.
chemical energy might have been reduced as the battery of the drone is usedup
explain why efficient energy storage is important in reducing the amount of carbon dioxide released when getting electricty?
Efficient energy storage is important because it lets us save extra renewable energy (like solar or wind power) for later use when there isn’t enough. This reduces the need to burn fossil fuels, which release CO₂. Storing energy helps us use more clean energy and less polluting energy, cutting down on carbon emissions.
