Electricity
What is static electrical
charges built up on object at rest
Solar Energy is transferred to _____ Energy.
Electrical
IF an ambulance is moving towards you how will you perceive the pitch? WIll it be higher? Lower? Explain
It'll be higher because frequency will be higher
Create a graph that represents an automobile accelerating following a period where it moved at a constant speed.
dont know how to model this
A ball is rolling a ramp onto the floor. As the angle increased on the ramp, the ball rolled further without stopping. As it rolled down the ramp what was the forces acting on the ball Explain Why.
gravity and friction
When do objects become charged?
when they gain or lose electrons
Explain how different media affect the speed of light
Speed of light travels fastest in the air because the molecules are farthest apart.
Sound waves are measured in decibels. Sound below 70 are not harmful. Sound between 70 and 140 can cause harm depending on how frequent. Sound greater than 140 can cause immediate and permanent hearing loss. Whch would suffer the mmost hearing loss and why?
A subway train conductor who works 50 hours
What is the shortest possible time in which a bacterium could travel a distance of 8.4 cm across a petri dish at a constant speed of 3.5 mm/s?
Which phenomena explains the placement of the coin at the bottom of glass if the coin was placed on a card and the card was removed?
Inertia
In the law of electric charges, what do like charges do?
repel
Force is measured using which type of unit?
Newtons
List the wavelength of the colords red green and blue. WHich one has the greater frequency and which one has the lowest frequeny
Red green blue
An athlete swims from the north end to the south end of a 50m pool in the 20 seconds and makes the return trip to the starting position in 22 seconds
What is the average velocity for the first half of the swim?
What is the average velocity for the second half of the swim?
What is the average velocity for the roundtrip?
2.5 m/s
2.2 m/s
4.7 m/s
Explaiin how you can find the weight of different masses using mass and force
Weight (w) = mass(m) * acceleration due to gravity(g)
In the law of electric charges, what do opposite charges do?
attract
It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box in Joules?
200 J
Which electromagnetic waves have the longest wavelegnths and lowest energy why?
Two balls of different masses are dropped from a building, and they hit the ground at the same time. How does the force of gravity, exerted on each ball, depend on its mass?
It is directly proportional to the ball’s mass
Two people parachute out of a plane at the same time. One weighs 100 lbs and the other wighs 150lbs. WHich one will have greater force and which one lesser. Which ones mass will be proportional to the gravity and force?
Both skydivers will experience the same acceleration due to gravity.
What are 3 ways objects become charged?
Friction, Induction, Conduction
Describe a reliable investigation to study how heat is transferred by conduction.
metal pan placed on a stove becomes extremely hot due to conduction. A red-hot iron immersed in cold water transfers its heat to the water through conduction as well, increasing the temperature of the liquid in the process. A kettle placed on top of a stove becomes hot through conduction.
A group of students conduct as lab simulation to compare and contreast characteristics of electromagnetic and mechanical waves. The teacher instructed them to make a list of the question to present to their classmates about the similarities and differences they observe. WHat questions should they ask?
Do they need a medium to travel?
Marissa's car accelerates uniformly at a rate of 2.6 m/s^2. How long does it take for Marissa's car to accelerate from a speed of 24.6 m/s to a speed of 26.8 m/s?
The time taken by the car to accelerate from a speed of 24.6 m/s to a speed of 26.8 is 1.3 seconds.
What is a force?
In Physics, force is defined as: The push or pull on an object with mass causes it to change its velocity