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A fire hose held near the ground shoots water at a speed of 5.4 m/s, At what angle(s) should the nozzle point in order that the water land 2.0 m away?
When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.23 m. Calculate the speed ( in m/s)at which the ball leaves the spring.
A uniform disk turns at 1.9 around a frictionless spindle. A nonrotating rod, of the same mass as the disk and length equal to the disk's diameter, is dropped onto the freely spinning disk. They th
After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.0 after it is released. How deep is the lak
A car of weight 2040 N operating at power of 197 kW develops a maximum speed of 32.2 m/s on a level, horizontal road. Assuming that the resistive force (due to friction and air resistance) remains c
Two thin rectangular sheets (0.19 m multiplied by 0.48 m) are identical. In the first sheet the axis of rotation lies along the 0.19-m side, and in the second it lies along the 0.48-m side. The sam
Why must a thermometer be calibrated? You have a glass bulb thermometer with no markings on it, and a second one marked in degrees Celsius. Explain how you would calibrate the unmarked thermometer.
In a certain right triangle, the two sides that are perpendicular to each other are 4.20 m and 8.30 m long. What is the tangent of the angle for which 4.20 m is the opposite side?
The current flowing through it is 11.8 A, and it is desired that the energy stored within the solenoid be at least 0.390 J. What is the least number of turns that the winding must have?
Describe some key evolutionary adaptations as life colonized land.
An astronaut on Mercury drops a rock straight downward from a height of 1.05 m. If the acceleration of gravity on Mercury is 3.73 m/s2, what is the speed of the rock just before it lands?
Two speakers, one directly behind the other, are each generating a 295-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a l
While walking through a forest you notice that someone has carved his or her initials into the bark of a tree. The initials are exactly 1.5 meters from the ground. How far from the ground will the ini
A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.0° below the horizontal. Find the length of time the car is in the air.
A 100 g ball moving to the right at 4.0 m/s catches up and collides with a 450 g ball that is moving to the right at 1.2 m/s. If the collision is perfectly elastic what is the speed of the 1--g ball a
Which of the following best characterizes an electron?
Which molecules of the Calvin cycle is/are most like molecules found in glycolysis?
If the clothing maker bought 500 of this fabric, how much money did he lose? Use and 1 tepiz = 0.625 dollars and 0.9144m = 1 yard .
Assume that an object can change its volume without changing its mass. If such an object increases its dimensions to twice as big, how much would its density change?
Which of the following characteristics are typical of an r-selected population?
An ocean liner leaves New York City and travels 12.0° north of east for 111 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
An ice skater with an initial rotational inertia of 4 kgm2 redistributes his mass so that his rotational inertia is now 0.5 kgm2. If his initial angular speed was 3 revolutions per second, calculate
Feeding behavior that has a high energy intake-to-ecpenditure ratio is called what?
a 25 kg child on a 2.0 m swing is released from rest when the swing supports make an angle of 30.0 degrees with the vertical.
Your reaction time before stepping on the brakes is 0.50 , and the maximum deceleration of your car is 11. How much distance is between you and the deer when you come to a stop?