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PRACTICE IT Use the worked example above to help you...
PRACTICE IT Use the worked example above to help you solve this problem. Find the currents...
PRACTICE IT Use the worked example above to help you solve this problem. Find the currents in the circuit as shown in the figure below by using Kirchhoff's rules. R -4.3 2 4.0 0 9.0 Ω EXERCISE HINTS: GETTING STARTED | I'M STUCK! Use the values from PRACTICE IT to help you work this exercise. Suppose the 6.0-V battery is replaced by a battery of unknown emf, and an ammeter measures 11 = 1.2 A. Find the other two currents...
PRACTICE IT Use the worked example above to help you solve this problem. (a) Calculate the...
PRACTICE IT Use the worked example above to help you solve this problem. (a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm. 12/m (b) If a potential difference of 10.7 V is maintained across a 1.00 m length of wire, what is the current in the wire? (c) The wire is melted down and recast with triple its original length. Find the new resistance RN as a multiple of the old resistance...
the tension Ti PRACTICE IT Use the worked example above to help you solve this problem....
the tension Ti PRACTICE IT Use the worked example above to help you solve this problem. A traffic light weighing 1.15 X 10N hangs from a vertical cable tied to two other cables that are fastened to a support, as shown in Figure (a). The upper cables make angles of 8, = 38,0° and e2 = 52.0° with the horizontal. Find the tension in each of the three cables. Ti = T₂ = T3 EXERCISE HINTS: GETTING STARTED I'M STUCK!...
PRACTICE IT Use the worked example above to help you solve this problem. An airplane has...
PRACTICE IT
Use the worked example above to help you solve this problem. An
airplane has wings, each with area 4.05 m2, designed so
that air flows over the top of the wing at 249 m/s and underneath
the wing at 226 m/s. Find the mass of the airplane such that the
lift on the plane will support its weight, assuming the force from
the pressure difference across the wings is directed straight
upwards.
Your response differs from the correct...
PRACTICE IT Use the worked example above to help you solve this problem. A circular wire...
PRACTICE IT Use the worked example above to help you solve this problem. A circular wire loop of radius 1.04 m is placed in a magnetic field of magnitude 0.495 T. The normal to the plane of the loop makes an angle of 30.0e with the magnetic field (see figure a). The current in the loop is 2.35 A in the direction shown. (a) Find the magnetic moment of the loop and,the magnitude of the torque at this instant. A...
PRACTICE IT Use the worked example above to help you solve this problem. A sled is...
PRACTICE IT Use the worked example above to help you solve this problem. A sled is tied to a tree on a frictionless, snow-covered hill, as shown in Figure (a). If the sled weighs 75.0 N, find the magnitude of the tension force T exerted by the rope on the sled and that of the normal force ni exerted by the hill on the sled. T = | 37.5 n = | 64.95 EXERCISE HINTS: GETTING STARTED I I'M STUCK...
PRACTICE IT Use the worked example above to help you solve this problem. In a car...
PRACTICE IT Use the worked example above to help you solve this problem. In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r = 4.55 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 13.7 cm. (a) What force must the compressed air exert on the small piston in order to lift a car weighing 13,300 N?...
PRACTICE IT Use the worked example above to help you solve this problem. In a huge...
PRACTICE IT Use the worked example above to help you solve this problem. In a huge oil tanker, salt water has flooded an oil tank to a depth of h2-5.40 m. On top of the water is a layer of oil - 8.40 m deep, as in the cross-sectional view of the tank as shown in the figure. The oil has a density of 0.700 g/cm. Find the pressure at the bottom of the tank. (Take 1,025 kg/m as the...
PRACTICE IT Use the worked example above to help you solve this problem. A uniform ladder...
PRACTICE IT Use the worked example above to help you solve this problem. A uniform ladder I 10.0 m long and weighing W when it makes a 0 47.0° angle with the ground, find the coefficient of static friction between the ladder and ground. 0.466 = 52.9 N rests against a smooth vertical wall. If the ladder is just on the verge of slipping EXERCISE HINTS: GETTING STARTED I'M STUCK! If the coefficient of static friction is 0.383, and the...
PRACTICE IT Use the worked example above to help you solve this problem. A patient receives...
PRACTICE IT Use the worked example above to help you solve this problem. A patient receives a blood transfusion through a needle of radius 0.25 mm and length 2.1 cm, The density of blood is 1,050 kg/m3. The bottle supplying the blood is 0.500 m above the patient's arm. What is the rate of flow through the needle? m2/s EXERCISE GETTING STARTED I I'M STUCK! HINTS: A pipe carrying water from a tank 19.5 m tall must cross 3.20 x...
PRACTICE IT Use the worked example above to help you solve this problem. Find the currents in the circuit as shown in the figure below by using Kirchhoff's rules. R -4.3 2 4.0 0 9.0 Ω EXERCISE HINTS: GETTING STARTED | I'M STUCK! Use the values from PRACTICE IT to help you work this exercise. Suppose the 6.0-V battery is replaced by a battery of unknown emf, and an ammeter measures 11 = 1.2 A. Find the other two currents...
PRACTICE IT Use the worked example above to help you solve this problem. (a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm. 12/m (b) If a potential difference of 10.7 V is maintained across a 1.00 m length of wire, what is the current in the wire? (c) The wire is melted down and recast with triple its original length. Find the new resistance RN as a multiple of the old resistance...
the tension Ti PRACTICE IT Use the worked example above to help you solve this problem. A traffic light weighing 1.15 X 10N hangs from a vertical cable tied to two other cables that are fastened to a support, as shown in Figure (a). The upper cables make angles of 8, = 38,0° and e2 = 52.0° with the horizontal. Find the tension in each of the three cables. Ti = T₂ = T3 EXERCISE HINTS: GETTING STARTED I'M STUCK!...
PRACTICE IT
Use the worked example above to help you solve this problem. An
airplane has wings, each with area 4.05 m2, designed so
that air flows over the top of the wing at 249 m/s and underneath
the wing at 226 m/s. Find the mass of the airplane such that the
lift on the plane will support its weight, assuming the force from
the pressure difference across the wings is directed straight
upwards.
Your response differs from the correct...
PRACTICE IT Use the worked example above to help you solve this problem. A circular wire loop of radius 1.04 m is placed in a magnetic field of magnitude 0.495 T. The normal to the plane of the loop makes an angle of 30.0e with the magnetic field (see figure a). The current in the loop is 2.35 A in the direction shown. (a) Find the magnetic moment of the loop and,the magnitude of the torque at this instant. A...
PRACTICE IT Use the worked example above to help you solve this problem. A sled is tied to a tree on a frictionless, snow-covered hill, as shown in Figure (a). If the sled weighs 75.0 N, find the magnitude of the tension force T exerted by the rope on the sled and that of the normal force ni exerted by the hill on the sled. T = | 37.5 n = | 64.95 EXERCISE HINTS: GETTING STARTED I I'M STUCK...
PRACTICE IT Use the worked example above to help you solve this problem. In a car lift used in a service station, compressed air exerts a force on a small piston of circular cross section having a radius of r = 4.55 cm. This pressure is transmitted by an incompressible liquid to a second piston of radius 13.7 cm. (a) What force must the compressed air exert on the small piston in order to lift a car weighing 13,300 N?...
PRACTICE IT Use the worked example above to help you solve this problem. In a huge oil tanker, salt water has flooded an oil tank to a depth of h2-5.40 m. On top of the water is a layer of oil - 8.40 m deep, as in the cross-sectional view of the tank as shown in the figure. The oil has a density of 0.700 g/cm. Find the pressure at the bottom of the tank. (Take 1,025 kg/m as the...
PRACTICE IT Use the worked example above to help you solve this problem. A uniform ladder I 10.0 m long and weighing W when it makes a 0 47.0° angle with the ground, find the coefficient of static friction between the ladder and ground. 0.466 = 52.9 N rests against a smooth vertical wall. If the ladder is just on the verge of slipping EXERCISE HINTS: GETTING STARTED I'M STUCK! If the coefficient of static friction is 0.383, and the...
PRACTICE IT Use the worked example above to help you solve this problem. A patient receives a blood transfusion through a needle of radius 0.25 mm and length 2.1 cm, The density of blood is 1,050 kg/m3. The bottle supplying the blood is 0.500 m above the patient's arm. What is the rate of flow through the needle? m2/s EXERCISE GETTING STARTED I I'M STUCK! HINTS: A pipe carrying water from a tank 19.5 m tall must cross 3.20 x...
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