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A 63 kg person expends 400 W when walking on a level treadmill at a speed of 10.8 km/h. When the treadmill is inclined without changing the speed, the person's expended power increases to 600 W. Estimate the angle of incline by assuming that all of the increased power output goes into overcoming the force of gravity.
A 22.5 cm screwdriver is used to pry open a can of paint. If the axis of rotation is 2.29 cm from the end of the screwdriver blade and a force of 79 N is exerted at the end of the screwdriver’s handle, what force is applied to the lid? Answer in unit..
Show that the uncertainty principle can be expressed in the form ΔL Δθ is greater or equals to h/2 where θ is an angle and L is the angular momentum. for what uncerainty in the angular momentum will the angular position of a particle be completely un..
A wheel accelerates from rest, making 74 complete revolutions in 6.2s. What is the angular speed of the wheel
the weight of the car is 14 kn. you know three points on the plane a2i6j1k b2i5j c5i2j all in meters. what is the force
A cannonball is launched from the ground at an angle of 45o above the horizontal and a speed of 45 m/s. With no air resistance, find with what speed ball will land on the ground
The circuit in figure 32-34 consists of switch S, a 20.0MΩ resistor, a 12.0V ideal battery, and an air filled capacitor. The capacitor has parallel circular plates of radius 5.00 cm, separated with 3.00 mm. At time t =0, switch S is closed to begin c..
a simple harmonic oscillator consists of a block of mass 3.90 kg attached to a spring of spring constant 169 nm. when t
What is the resistance of a lightbulb that uses an average power of 40.0 W when connected to a 60.0-Hz power source having a maximum voltage of 132 V
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneously breaks into two alpha particles, What is the initial magnitude of the acceleration of the alpha particles
A steel pellet (density = 7.8 g/cc) of volume 5.0cc heated to100°C is dropped into a foam cup containing 20cc of water at 15°C. The final temperature of the mix is 30°C. Assuming no heat loss to the environment, decide the specific heat capacity of s..
A tortoise and rabbit engage in a footrace over a distance of 3.90 km. The rabbit runs 0.480 km, then stops for a 87.0-min nap. Upon awakening, he remembers the race, and runs twice as fast. Finishing the course in a total time of 1.85 h, the rabbit ..
A 0.170 kg toy is undergoing SHM on the end of ahorizontal spring with force constant k=390 N/m. What is the total energy of the object at any point of its motion
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