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In a certain automobile engine with an efficiency of 21.2%, combustion of gasoline in one cylinder releases 505 J of heat.
(a) Find the work done by the system of gasoline vapor and air on the surroundings during one cycle.
(b) Find the total mechanical power produced by all four cylinders, operating at 48 cycles/s, or 2880 rpm.
A 3.5 m long horizontal rod has two forces applied to it. One on the far left corner with a force of 4N at 60 degrees downward, find the magnitude and direction of the force in the pin
a man with mass m1 61 kg stands at the left end of a uniform boat with mass m2 168 kg and a length l 2.6 m. let the
A platinum resistance thermometer has resistances of 206.97 W when placed in a 0°C ice bath and 257.43 W, What is the melting point of potassium
In a head-on collision, a car stops in 0.27s from a speed of 24m/s}. What force is applied to the driver by his seat belt during that fraction of a second
A 3.00-kg mass undergoes an acceleration given by a = (2i+5j ) m/s2. The magnitude of the net force is
Two long, parallel wires are separated by a distance of 3.40. The force per unit length that each wire exerts on the other is 3.20×10-5, and the wires repel each other. The current in one wire is 0.6690.
The maximum speed of a 3.5-kg mass attached to a spring is 0.67m/s , and the maximum force exerted on the mass is 11N. What is the amplitude of motion for this mass
On a workday the average decibel level of a busy street is 78 dB, with 100 cars passing a given point every minute. what is the decibel level of the street
A student walks 24 m from her math class and then turns 90° and walks 10 m to her locker, that is directly north of her class. What is her total displacement.
A relatively loud sound can be created because a standing wave occurs in the bottle. Explain why the pitch of the sound becomes higher
You can exert a total of 75 J to launch a 0.75 kg projectile up a 5 m long ramp. What is the total distance (in m) traveled by the projectile
A weather vane initially at rest has a moment of inertia of 0.104 kg · m2 about its axis of rotation. Find the angular velocity of the weather vane just after it is struck
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