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A heat engine has a source of 1400.0 cal and lose 300 cal converting it into work. How much mechanical work was done?
A doubly charged ion (charge 2e) with velocity 6.9 × 106 m/s moves in a circular path of diameter 60.0 cm in a magnetic field of 0.80 T in a mass spectrometer
A test charge of +2 micro C is placed halfway between a charge of +6 micro C and another +4 micro C sperated by 10cm. what is the magnitude of the force on the test charge
Suppose you are climbing up stairs, gaining 10 meters of height per minute. In order to do that, your body has to do some work, using energy, at a given rate. What is the power produced by your body? Ignore energy losses.
A ranger in a national park is driving at 44 km/h when a deer jumps onto the road 70 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce an acceleration of -3.00 m/s2.
A firefighter mounts the nozzle of his fire hose a distance 36.9 m away from the edge of a burning building so that it sprays from ground level at a 45° angle above the horizontal. By what factor was the nozzle diameter changed
The temperature of the glass surface of a 30 W lightbulb is 75°C when the room temperature is 18°C. Estimate the temperature of a 150 W lightbulb with a glass bulb thesame size
Two particles collide and stick together to form a new particle.First particle has a rest energy E0 and a kinetic energy 2E0.Second particle is stationary and has a rest energy 2Eo. Find therest energy and the speed of the new particle.
An astronaut on the moon fires a projectile from a launcher on a level surface therefore as to get the maximum range. determine what is the range of the projectile
Find the magnitude and direction of the force exerted on a 4.75 µC charge by a 285 N/C electric field that points due east
In exercise physiology studies it is sometimes important to determine the location of a person's center of mass. How far from the woman's feet is her center of mass
a circuit containing a 80 mh inductor and a 60 of capacitor in series is connected to a 230 v 50 hz supply. the
Two long, parallel wires, each with the mass per unit length of 43 g/m, are supported in a horizontal plane by 6-cm long strings. Each wire carries the similar current, I, causing the wires to repel each other so that the angle, θ, between the sup..
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