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A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.9 g, which includes fuel mass of 13.0 g. The duration of its burn is 1.90 s. (Assume all the fuel is consumed.)
(a) What is the average exhaust speed of the engine?
_____ m/s
(b) This engine is placed in a rocket body of mass 42.0 g. What is the magnitude of the final velocity of the rocket if it were to be fired from rest in outer space by an astronaut on a spacewalk? Assume the fuel burns at a constant rate.
______ m/s
A 26-mH inductor, an 7.9-? resistor, and a 6.2-V battery are connected in series.The switch is closed at t = 0. Find the voltage drop across the inductor at t = 0. V
A person with a weight of 273.6 lb stands on two feet with their weight equally distributed between the two shoes, What is the pressure on each shoe independently
At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.2 m/s2. How fast will the automobile be traveling at that instant
The student realizes that the spring demonstrates SHM with the attached mass of 255.0 g. The student is next asked to calculate the period of oscillation, T
A 54.5-kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.646 and 0.321, respectively. What horizontal pushing force is required to just start the crate moving
A child is twirling a 0.0224-kg ball on a string in a horizontal circle whose radius is 0.104 m. The ball travels once around the circle in 0.350 s. Determine the centripetal force acting on the ball
A cylindrical conductor has resistance of R0 = 200 ? (ohms). what's the value of the new resistance in ohms
A 1.20 kg mass on a horizontal spring oscillates on a frictionless surface with a displacement as a function of time given by x(t) = 0.075cos(4.16t â€" 2.45). Find the total energy of the oscillating spring
A soccer player kicks a rock horizontally off a 34.0-m-high cliff into a pool of water. what was the initial speed given to the rock
A surface encloses the charges q1=3.4uC , q2=7.0uC, and q3=-3.8uC. Find the electric flux through this surface
The distance between a proton and an electron is 1m. Calculate the electric force and gravitarional force between them
A shopper in a supermarket pushes a cart with a force of 33 N directed at an angle of 25° below the horizontal. Find the work done by the shopper as she moves down a 44 m length aisle
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