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A 20000 { kg} rocket has a rocket motor that generates 3.0×105{ N} of thrust. What is the rocket's initial upward acceleration? At an altitude of 5.0 { km} the rocket's acceleration has increased to 6.0{ m/s^2} . What mass of fuel has it burned?
In order to get that pesky pig you launch a bird at an angle large enough to pass over the barrier. The pig is 80m from the launching point and the barrier is 30m from the launching point. What is the initial horizontal speed
An object with a charge of -4.4?C and a mass of 1.7×10?2kg experiences an upward electric force, If the electric charge on the object is doubled while its mass remains the same, find the direction and magnitude of its acceleration
an alien spaceship traveling at a constant velocity of 13 in the x direction passes the earth call this event a at time
The gravitational potential energy of all the water stored behind avery large dam is 1.2×1016 J, using the base of the damas the reference point for zero PE. Imagine you could store the same amount of potential energy in a system consisting oftwo ..
A transverse wave on a string is described by the equation y(x, t) = (2.27 cm) sin[(109 rad/s)t + (13 rad/s)x]. How fast does the wave move along the string
A 40 percent efficient electric power plant produces 900MW of electric power and discharges waste heat into 30 C ocean water. Suppose the waste heat could be used to heat homes during the winter instead of being discharged into the ocean. A typical A..
During a fun run a girl runs for 12 s moving 2.7 m/s. She then accelerates at 0.5 m/s^2 over the next 25 m. What distance did she cover during the entire period
There are 5 pairs of plates: A,B, and D are charged plastic plates and C is an electrically neutral copper plate. A is attracted to B, C to A, C to D, B to D, How can you tell if they attract or do not
An airplane traveling at half the speed of sound emits a sound of frequency 5.31 kHz. (a) At what frequency does a stationary listener hear the sound as the plane approaches? (b) At what frequency does a stationary listener hear the sound after the p..
A spring is initially compressed by 17.5 cm. If it takes 7.166 J of work to compress the spring an additional 3.5 cm, what is the spring constant of the spring
A ball of m1 is held slightly above ball of mass m2. The two balls are droped simultaneously, falling distance h vertically from rest. Calculate the height to which the first ball rebounds
A wheel starts at rest and takes 3.00 s to rotate 37.0 revolutions at which point its angular velocity is 98.0 rad/s. What is the constant angular acceleration of the wheel
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