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A hypodermic syringe contains a medicine with the density ofwater. The barrel of the syringe has a cross-sectional area A= 2.50x 10^-5 m^2 and the needle has a cross-sectionalarea a= 1.00 x 10^-8 m^2. In the absence of a force on the plunger,the pressure everywhere is 1 atm. A force F of magnitude 2.00N actson the plunger, making the medicine squirt horizontally from theneedle. Determine the speed of the medicine as it leaves theneedle's tip.
An 76.5 kg fullback moving east with a speed of 5.7 m/s is tackled by a 89.0 kg opponent running west at 2.74 m/s, and the collision is perfectly inelastic. Calculate the velocity of the players just after the tackle
The tub of a washer goes into its spin-dry cycle, starting from rest and reaching an angular speed of 2.0 rev/s in 8.0 s. Through how many revolutions does the tub turn during this 21-s interval
A 2.8 kg solid sphere (radius = 0.20 m) is released from rest at the top of a ramp and allowed to roll without slipping, When the sphere reaches the bottom of the ramp
A positron moving in the positive x-direction at 2 * 10^8 m/s collides with an electron at rest. The positron and electron annihilate, producing two gamma-ray photons. Photon 1 travels in the positive x-direction and photon 2 travels in the negative ..
consider the case of a wooden block moving along a horizontal track, how much is the change in mechanical energy
q1. a 1035 kg car carrying four 78 kg people travels over a rough washboard dirt road with corrugations 5.0 m apart
A thin, cylindrical rodscript l=24.6cmlong with a massm= 1.20 kghas a ball of diameterd=10.00cmand massM= 2.00 kgattached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure below. The co..
A ruby laser emits an intense pulse of light that lasts a mere 10 ns. The light has a wavelength of 690 nm, and each pulse has an energy of 400 mJ. How many photons are emitted in each pulse
q1. a kid fires water horizontally from a squirt gun held 1.6 above the ground. it hits other kid 2.4 away squares in
q1. an 1100- car is held in place by a light cable on a very smooth frictionless ramp. the cable makes an angle of 31.0
A soccer ball is kicked with an initial horizontal velocity of 18 m/s and an initial vertical velocity of 21 m/s, How far from where it was kicked will the ball land
A basketball player achieves a hang time of 0.987 s in dunking the ball. What vertical height will he attain
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