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You are an astronomer on planet Neo, which orbits a distant star. It has recently been accepted that Neo is spherical in shape, though no one knows its size. One day, while studying in the library of Town A, you learn that on the equinox your sun is directly overhead in Town B, located 1200 kilometers due north of you.On the equinox, you go outside in Town A and observe that the altitude of your sun is 78?.
What is the circumference of Neo? (Hint: Apply the technique used by Eratosthenes to measure Earth's circumference.)
Discuss current and future practices in response to terrorism and related violence.
A skier is accelerating down a 30 degree hill at 2.00 m/s squared. what is vertical component of her acceleration
the starter motor of a car engine draws a current of 170a from the battery. the copper wire to the motor is 4.0mm in
A 1432.0 g mass is on a horizontal surface with μk = 0.44, Calculate the distance the spring was compressed. What is the velocity of the mass as it loses contact with the spring
A charge Q is transferred from an initially uncharged plastic ball to an identical ball 11cm away. The force of attraction is then 42mN. How many electrons were transferred from one ball to the other
An elevator (mass 5000 kg ) is to be designed so that the maximum acceleration is 6.20×10?2 g. What is the minimum force the motor should exert on the supporting cable
The angular momentum of a flywheel having a rotational inertia of 0.250 kg·m2 about its central axis decreases from 2.80 to 1.800 kg·m2/s in 1.00 s. What is the average power of the flywheel
Given R1=16 Ohms, R2=71 Ohms, and R3=47 Ohms, calculate the voltage across resistor R1 if the resistor R1 is in a series with a parallel combination of R2 and R3 and the whole circuit is connected to a 12 Volt battery
A 50kg pullvolter running at 10 m/s vults over the bar. Her speed when she is above the bar is 1 m/s. estimate her altitude as she crosses the bar
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time". If the ball is kicked with an initial velocity of 25.0 m/s at an angle of 60.0 degrees above the ground, illustrate what is the "hang time"?
Is it possible for a situation to exist in which the net force acting on the object (the net force is the sum of all the individual forces acting on the object) is equal to zero X F~ = 0while the net torque about any axis (the net torque is the su..
A 560 kilogram crate attached to a cable is rising upward and slowing down. The magnitude of its acceleration is 1.4 m/s2. Compute the magnitude of the tension in the cable
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