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Question1
A 44.0 kg child is in a swing that is attached to ropes 1.90 m long.
The acceleration of gravity is 9.81 m/s2.
Find out the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: while the ropes make a 37.0 degree angle with the horizontal
Question2
A 66 human sprinter can accelerate from rest to 11 in 3.4. Throughout the same interval, a 28 greyhound can accelerate from rest to 23. Calculate
(a) Change in kinetic energy and
(b) Average power output for each
Consider Iron asteroid (density 7900 kg/m^3) shaped like a cylinder 5.0 km long and 3.0 km in diameter, How much fuel is required to spin up the asteroid
An infinitely-long, uniformaly charged line of charge with linear charge density x=0.1_C/m lies a distance d=0.068_m from the center of a sphere with radius R = 0.23_m. What is the amount of charge inside the sphere
A 50 foot garden hose isfilled with sea water. What is the resistance from one end to the other, what is the current density in the hose
While the dried up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.4 m/s at an angle of 60° above the horizontal.
THe Voyager one has a 20-W radio transmitter and is expected to transmit to 2025 when it is 25 billion km from the earth. WHat's the Diameter of a dish antenna
A charge of 1 uC accelerates through a potential difference of 200V. What is the change in the electric potential of the charge
Purchase new automated equipment that will change the proportion between variable and fixed costs to 40% variable and 60% fixed. Determine the selling price per unit. Calculate the break-even point in dollars for 2011.
A plane sinusoidal electromagnetic wave in air has a wavelength of 3.90cm and an E field amplitude of 1.40V/m. What is the magnetic field amplitude?
in a series LRC circuit the frequency at which the circuit is at resonance is f0, if you double the resistance, the inductance, what is the new resonance frequency
A 1000 kg car pushes a 2000 kg truck that has a dead battery. When the driver steps on the accelerator, What is the magnitude of the force of the car on the truck
A potter's wheel moves uniformly from rest to an angular speed of 0.18 rev/s in 28.0 s, Find its angular acceleration in radians per second per second
A converging lens with a focal length of 20 cm and a diverging lens with a focal length of -70 cm are 110 cm apart. Calculate the distance between image and diverging lens
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