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Determine the force exerted on a rocket, given that the propelling gases are expelled at a rate of 1500 kg/s with a speed of 4.0 x 10^4 m/s (at the moment of takeoff).
A baseball is bunted down the third-base line leaving the bat from a height of 0.800m with an initial velocity of 8.00m/s at an angle 30 degrees above the horizontal. What is the speed of the ball just before it hits the ground
A bat can detect small objects such as an insect whose size is approximately equal to one wavelength of the sound the bat makes. what is the smallest insect a bat can detect
A diver shines a flashlight upward from beneath the water at a 44.5° angle to the vertical. At what angle does the light leave the water
two locomotives approach each other on parallel tracks. each has a speed of v 80 kmh with respect to the ground.if
In the picture mass 2 is initially at rest and attached to a spring of constant k. (The spring is fixed to the wall). Mass 1 travels at speed v and collides with mass 2 and the two stick together. ( There is no friction). Find an expression for the m..
A golf ball is sent flying at an angle of 35 degrees for a total flight time of 5 seconds. Landing at the same level from which it took off, what was the horizontal distance in feet traveled by the ball
For this question, I got 196 nC but apparently its -196 nC and i was hoping you could explain why the answer is negative: A styrofoam ball of mass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on ..
A plate hits the floor and breaks into 2 pieces. The first piece has a mass of 0.2 kg and flies off at an angle of 30 degrees above the horizontal at 1.5 m/s. At Which direction does the second piece go
A particle (q=7.5*10^-6 C) is released from rest at a point on the x-axis, x = 10 cm. It begins to move due to the presence of a 2.0*10^-6 C charge which remains fixed at the origin. What is the kinetic energy of the particle at the instant it passe..
0.0024 J of energy are stored in a parallel-plate capacitor whose plates each have area 0.30 m2 and are 1.5 mm apart. What is the electric field energy density between the plates
An airplane pilot fell 365 m afterjumping from an aircraft without his parachute opening. find the work done by the snow in bringing him to the rest
Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.5m/s2 for a height 63.0cm, What is the speed of the shot when he releases it
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