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A rotating wheel requires a time t = 4.32s to rotate 37.0 revolutions. Its angular speed at the end of the interval is !f = 75:9 rad/s. What is the constant angular acceleration (rad/s2 of the wheel?
An eagle perched on a tree limb 19.5 m above the water spots a fish swimming near the surface. How long does it take for the eagle to reach the water
An airplane moves 140 m/s as it travels around the vertical circular loop which has a 1 km radius. What is the magnitude of the resultant force on the 70 kg pilot of this plane at the bottom of this loop.
Assume that the Sun radiates like an ideal thermal source at a temperature of 6000 K, What is the intensity of the solar radiation emitted in the range 550.0 nm to 552.0 nm
Two spheres of mass m and a third sphere of mass M form an equilateral triangle, and a fourth sphere of mass mB is at center of the triangle.
A group of people with total mass 1500 kg stands in a boat with mass 12,000 kg at rest in frictionless water. If the whole group walks 6.5 m from bow to stern, how much does the boat move in meters
An aluminium block of mass m1 = 3.45 kg and a copper block of mass m2 = 6.30 kg are connected by a light string over a frictionless pulley. They sit on a steel surface, where θ = 40.0°
Two point charges Q1 = +4.55 nC and Q2 = ?1.65 nC are separated by 50.0 cm. (a) What is the electric potential at a point midway between the charges? (b) What is the potential energy of the pair of charges? What is the significance of the algebrai..
An electron and a 140-g baseball are each traveling 200m/s measured to an accuracy of 0.095%, Calculate the uncertainty in position of the baseball
What is the rms current in an RL circuit when a 60.0Hz 240V rms ac voltage is applied, where R = 1.80k? , and L = 420mH?, What is the phase angle between voltage and current
A police siren has a frequency of 550 Hz as the police car approaches you and a frequency of 450 Hz after it has passed you and receding, What is the true frequency of the police siren
A 80 pF capacitor is charged to a potential difference of 140 V, and the charging battery is disconnected. what is the capacitance of this second capacitor
An empty parallel plate capacitor is connected between the terminals of a 2.8-V battery and charged up, what is the new voltage between the plates of the capacitor
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