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a cylindrical wheel is rotating with a constant angular acceleration of 4.0 rad/s^2. At the instant it reaches an angular speed of 2.0 rad/s, a point on its rim experiences a total acceleration of 8.0 rad/s^2. What is the radius of the wheel?
What would be the equilibrium temperature when a 270 g block of copper at 300°C is placed in a 150 g aluminum calorimeter cup containing 820 g of water at 12.0°C.
A radio station broadcasts at a frequency of 92.0 MHz with a power output of 51.8 kW. what is the energy of each emitted photon
A typical American family uses 1120 kWh of electricity a month. On average, what is the resistance of a household
The technique known as potassium-argon dating is used to date old lava flows. The potassium isotope 40K has a 1.28 billion year half-life, What is the age of the rock
The atomic number of lead is 82. The alpha particle is a helium nucleus, with atomic number 2.
If a charge of 0.30 C passes through a person's chest in 1.0 s, If this rate of charge transfer persists for 4.4s, how many electrons pass through the chest
A rocket is launched at an angle of 56.0° above the horizontal with the initial speed of 101 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 28.0 m/s2. At this time, its engines fail and the rocket proceeds..
An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. What is the electric field energy density at P
A 150-? resistor is connected in series with a 0.250-H inductor. The voltage across the resistor is vR = (5.70 V)cos[(445 rad/s)t]. Determine the inductive reactance of the inductor
A 1.5kg- block of ice is initially at a temperature of -7.0C a)If 2.6×10^5J of heat are added to the ice, what is the final temperature of the system? b)Find the amount of ice, if any, that remains.
In an RC series circuit, ? = 12.0 V, R = 2.02 M?, and C = 2.33 µF. Find the maximum charge that will appear on the capacitor during charging
The primary coil of an ideal transformer has 710 turns, and the secondary coil has 190 turns. find the output current of the secondary coil
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