Unit 1
Anything with both a direction and a magnitude.
What is a vector?
Any action always has an equal and opposite reaction.
What is Newton's Third Law?
A stationary boulder on the top of the hill has this type of energy.
What is potential?
If we put 50 kg of water at 20 C in with 50 kg of water at 100 C, this is the equilibrium temperature.
What is 60 C? (m*c*delta_t = - m*c * delta_t)
Increasing Voltage of a circuit will do this to current if resistance is held constant.
What is increase? (V = I*R)
If I am running around the track at a constant rate, what is constant (speed or velocity)?
What is speed (due to changing direction)?
When throwing a ball into the air, at the top of its arc, the velocity equals this.
What is 0?
When pushing your very full suitcase (30 kg) up to the Dining hall (height = 25 m), you do this much work.
What is 7350 J? (Work = F*d = m*g*d)
When heating up 24 kg of gold from 10 degrees C to 90 degrees C, we need this much energy. (specific heat is 129 J/kgC)
What is 247,680J? (E = m*c*(Tfinal-Tinitial))
A circuit with three light bulbs will shine brightest when organized in this way.
What is parallel? (Resistance goes down, Current goes up)
If I have a flat line for a velocity vs time graph, what is happening?
How fast is a ball moving after dropping it for 30 seconds.
What is 294 m/s?
When you throw a ball upwards at 10 m/s (from a height of one meter), it will reach the top of its arc after this many seconds.
What is 1.02 s? (vf = vi + a*t )
200 degrees Celsius in Fahrenheit. (F = 9/5*C+32)
What is 392 F? (F = 9/5*C+32)
The equivalent resistance of a series circuit with three resistors (5 ohms, 6 ohms, and 7 ohms).
What is 18 ohms? (R_eq = 5 + 6 + 7)
What is Dr. Ward's dog's speed if she can run 1000 meters in 2 minutes? (in m/s)
What is 8.333 m/s?
When dropped from 100 m high, a ball will be moving at this speed when it lands.
What is -44.27 m/s? (vf^2 = vi^2 + 2*a*(xf-xi))
When you throw a ball upwards at 10 m/s (from a height of one meter), it will hit the ground at this speed.
What is -10.93 m/s? (vf^2 = vi^2 + 2*a*(xf-xi) )
30 kg of water at 40 C (specific heat of 4184 J/kgC) is mixed with 2 kg of aluminum at 80 C (specific heat of 887 J/kgC) and comes to this equilibrium.
What is 40.56 C? ( m_water*c_water*(Tf - 40) = m_aluminum*c_aluminum*(Tf - 80) )
The equivalent resistance of a parallel circuit with 5 ohms, 6 ohms, and 7 ohms.
What is 1.96 ohms? (1/Req = 1/5 + 1/6 + 1/7) )
What is 50 miles?
The final velocity of a car (mass 1000 kg, v_initial = 30 m/s) that collides inelastically with a truck (mass 3000 kg v_initial = -25 m/s).
What is -11.25 m/s? m_car*v_car_initial + m_truck*v_truck_initial = v_combined_final(m_car + m_truck)
A bowling ball (mass 8 kg) rolls down a hill (height 50 m), gaining speed as it rolls. If we ignore air resistance and friction, the ball will be going this fast at the bottom of the hill.
What is 31.3 m/s? (m*g*h = 1/2*m*v^2)
Looking at a temperature vs energy graphs, the energy needed to change phase can be found by looking at this.
What is the length of the flat section of the graph?
The current in a branch with 15 ohm resistor in a parallel circuit with the 15 ohm resistor and a 10 ohm resistor if the battery is supplying 10 V.
What is 0.667 A? ( Voltage drop is always going to be 10 V, so I_15 = 10/15)