Ch. 6 Physics Foundations
An ideal strings connects two masses, one hanging from the other. The magnitude of the tension at the top of the string is ______ the magnitude of the tension at the bottom of the string
What is equal to?
What is the joule?
A wave that has energy moving perpendicular to the direction of the disturbance as it travels through a material.
What is a transverse wave?
The sum of the kinetic energy of the particles within a substance is this.
What is thermal energy?
The law stating that the electrostatic force on two charged objects is directly proportional to the charge on each object and inversely proportional to the square of the distance between them.
What is Coulomb's Law?
An ideal strings acting on a block of wood does this.
What is pulls in line with the string?
The product of the magnitude of a system's displacement and the component of force acting on the system parallel to that displacement.
What is work?
A 2 kg mass is resting on a frictionless surface is attached to an ideal 800 N/m spring. It is set in motion by displacing 75 cm to the left. What is the period of motion? hint: formula 10.2
.314 s
What is thermodynamics?
A material with variable conductivity that can be controlled by conditions such as impurities, temperature, or electric fields.
What is a semiconductor?
The frictional force that prevents two surfaces from slipping by each other is this.
What is the static friction?
A weightlifter takes 2 s to lift 150.0 kg to a height of 2 m. What is the power output? (equation 8.3)
What is 1471.5 w
or 1500 w
The perceived change in pitch (frequency) of a wave due to a moving source, a moving receiver, or both.
What is the Doppler effect?
- 20 degrees Celcius to Fahrenheit
- 4 degrees Fahrendheit
8.99 x 109 N m2/C2
Coulomb's constant
This is the normal force of a car resting on a horizontal surface that has a mass of about 2000 kg.
What is 19,620 N?
Acceptable: what is 20,000 N?
Formula for work
What is W = (F) (delta x) cos theta
or W = P/t
The mass is at a single point at the end of a pendulum arm, which is a massless string or rod.
What is an ideal pendulum?
0 degrees kelvin to Celsius
-273.15 Celsius
A conductive body so large that its charge is relatively unaffected when electrons are added or removed.
What is an electrical ground?
The normal force of a 15 kg child at the top of a slide with a 30 degree incline.
what is 127.4 N
or What is about 130 N?
Superman tries to stop a rolling vehicle by applying 150 N of force at an angle of 15 degrees above the horizontal; it takes him 20 m to stop the car. What work does he do? hint: use the formula from the question above.
What is 2897 J
A fire engine's siren produces a sound of 512 Hz on a hot day. The speed of sound on that day is 348 m/s. Assuming you are stationary, this is the perceived frequency as the truck approaches you at 25 m/s.
What is 551.6 Hz
100 degrees Fahrenheit to Kelvin
What is 310.9 k
A point charge of 1.00 x 10 (-6) C is 0.100 m from a second point charge of -2.00 x 10(-6) C. What is the electric force on each particle?
What is -1.798 N?