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The tension in the string is 27 N. (a) What is the wave speed? (b) Find the linear density of this string in grams per meter.
What angles do the plus and minus first order diffracted beams make with the direction of the zero-order transmitted beam?
If the ball is thrown upward with the same initial velocity but in air instead of a vacuum, it reaches a height of 8.4 meters. what is the drag force (assuming that is constant) on the ball during t
A grindstone of radius 4.0m is initially spinning with an angular speed of 8.0 rad/s. The angular speed is then increased to 10 rad/s over the next 4.0 seconds. Assume that the angular acceleration
While rearranging a dorm room, a student does 306 J of work in moving a desk 3.4 m. What was the magnitude of the applied horizontal force.
The systematic study of social behavior and human groups is known as
Compare your results to the general expression for the instantaneous acceleration a for uniform circular motion that is derived in the text.
What was the speed of the cannon ball if the spring compressed 53 cm when the cannon was fired?
The ratio of the average acceleration values is a1/a2 = 1.31. Find the velocity of the car at the end of the initial ten-second interval.
Tarzan swings on a 26.0 m long vine initially inclined at an angle of 38.0° with the vertical. What is his speed at the bottom of the swing if he starts from rest?
A hunting how imparts an acceleration of 5300.m/s^2 to a 29.3 g arrow at an angle of 15.0 degrees to the horizontal. What is the horizontal component of the force exerted by the bow on the arrow?
What amplitude of simple harmonic motion of the spring-blocks system puts the smaller block on the verge of slipping over the larger block?
Suppose the speakers are reconnected so that the 530 Hz sounds they emit are exactly out of phase. At what positions are the intensity maximum and minimum now?
The electric field 1.0 from a charge van de graaff generator is 2500 n/c. Calculate the charge on the generator
A projectile is fired at an upward angle of 45° from the top of a 226 m cliff with a speed of 173 m/s. What will be its speed when it strikes the ground below? (Use conservation of energy.)
Two loudspeakers are placed 3.00m apart, as shown in the figure . They emit 498 Hz sounds, in phase. A microphone is placed 3.20m distant from a point midway between the two speakers, where an inten
What stage of the scientific method would someone be at if they make a prediction that drinking alcohol will make people more violent during a sporting event?
What is least important in returning blood to the heart? Negative intrathoracic pressure, valves and veins, the pumping action of skeletal muscles, or the pushing of blood by the arterial system
Take the mass of the sun to be = 1.99×1030 , the gravitational constant to be = 6.67×10-11 , and the acceleration due to gravity at the earth's surface to be = 9.810 .
A water skier is pulled by a net force of 147 N and has an acceleration of 2.1 m/s2. What is the mass of the skier?
A firefighter of mass 43 kg slides down a vertical pole with an acceleration of 4 m/s^2. The acceleration of gravity is 10 m/s^2 . What is the friction force that acts on him?
A bicycle tire pump has a piston with area 0.44 in. If a person exerts a force of 30lbs on the piston while inflating a tire, what pressure does this produce on the air in the pump?
From the angular displacement 49 ? of the two bullet holes in the disks and the rotational speed 1142 rev/min of the disks, we can determine the speed of the bullet.What is the speed of the bullet?
A cube of ice is taken from the freezer at -9.2°C and placed in a 102 g aluminum calorimeter filled with 300 g of water at room temperature of 20°C. The final situation is observed to be al
A wire 2.00 m long and 1.00 mm in diameter has a resistance of 0.500 Ω. A second wire 4.00 m long and 2.00 mm in diameter has twice the resistivity of the first wire. Find the resistance of t