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Q. To water the yard you use a hose with a radius of 3.50 cm. Water flows from the hose with a speed of 1.10 m/s. If you in part block the end of the hose so the effective radius is now 0.55-cm, with what speed does water spray from the hose?
Q. An object weighs 311-N in the air. When tied to a string, connected to a balance, and immersed in water, it weighs 231-N. When it is immersed in oil, it weighs 262-N. Find the density of the object. Find the density of the oil.
Two circus performers, Jack and Jill, whose total mass is 120 kg, start a swing which is 5 m long such that initially the rope attached to their swing makes an angle of 36 degrees with the horizontal.
A 110 g cube of ice at 0°C is dropped into 1 kg of water that was originally at 90°C. What is an final temperature of the water after the ice has melted.
A 220 g block on a 50 cm long string swings in a circle on a horizontal, frictionless table at 95.0 rpm. what is the tension on the string.
A staging that weighs 440 N supports two painters, one 110 N and the other 460 N. The reading in the left scale is Ft = 800 N. What is the reading Fr, in the right hand scale.
A gas expands from I to F. The energy added to the gas by heat is 418 J when the gas goes from I to F along the diagonal path. (a) What is the change in internal energy of gas? (b) How much energy must be added to the gas by heat for indirect path..
What is the speed of projectile immediately before it hits the ground if air friction does one and a half times as much work on projectile when it is going down as it did when it was going up.
Calculate the time the microgel would require to recover to 99% of its initial height after the stress is removed. Determine the potential barrier for the molecule aggregation?
If the maximum acceleration vehicle's brakes are capable of is -6.00 m/s2, what is the maximum reaction time of the motorist that will allow her or him to avoid hitting the deer.
Determine the power distribution in carrier and sidebands if the transmitted power is 1,000 W and mf = 1.
A 128 carton is pulled up a frictionless baggage ramp inclined at 30.0 above the horizontal by a rope exerting a 72.60 pull parallel to the ramp's surface. If the carton travels 5.20 along the surface of the ramp, compute the work done on it by the r..
A flight attendant pulls her 61N flight bag a distance of 279m along a level airport floor at a constant velocity. The force she exerts is 41N at the angle of 50° above the horizontal.
In one design, a large spring with spring constant 2×10^4 N/m was placed behind the cannon. The other end of the spring braced against a post that was firmly anchored to ship's frame.
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