(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.)
. A solid metal cylinder has a certain resistance. It is then heated and carefully stretched to form a longer, thinner cylinder. After it cools, will its resistance be the same as, greater than, or less than what it was before? Explain our choice.
Want to see the full answer?
Check out a sample textbook solutionChapter 7 Solutions
Inquiry into Physics
Additional Science Textbook Solutions
Tutorials in Introductory Physics
Essential University Physics: Volume 1 (3rd Edition)
Physics for Scientists and Engineers, Technology Update (No access codes included)
The Cosmic Perspective (8th Edition)
EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
Essential University Physics: Volume 2 (3rd Edition)
- (Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . Six resistors, all having the same temperatures and compositions, are each attached to a battery with voltage V to form a simple circuit. The resistors have different lengths, l, but the same diameters. Rank the circuits according to the current that flows through the resistor from smallest to greatest. If two (or more) circuits have the same current flowing, give them the same ranking. Explain the rationale you used to establish your rankings. Circuit 1: l = 2 cm; V = 3 V Circuit 2: l = 2 cm; V = 6 V Circuit 3: l = 1 cm; V = 3 V Circuit 4: l = 1 cm; V = 6 V Circuit 5: l = 3cm; V = 2 V Circuit 6: l = 3cm; V = 6 Varrow_forwardWhat is the heat produced in a conductor in 4.3 minutes if there is a current of 1.8 A and a resistance of 26 Q? Round the final answer to a whole number.arrow_forwardA wire of 68 in length and 7 mm2 has a resistance of 0.98 ohms. A 136-m length of wire of the same material has a resistance of 4 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm. Round your answer to 2 decimal places. Please show your correct and complete solution. ASAP!arrow_forward
- is 8 : The resistance of a potentiometer wire and its length is 8 m. A high resistance box and a 2 volt battery are placed in series with it. What should be the value of the resistance in the box if it desired to have a potential drop of 1 microvolt per mm ?arrow_forwardAn iron wire with a diameter of 2 mm will be used to connect a voltagesource to a 100 kΩ resistor. Numbers for conductivity and resistivity can be found inthe textbook.(a) What is the current needed to flow through the resistor if the resistor is to produce1 mW of heat?(b) What is the voltage drop across the 100 kΩ resistor if it has the current you foundin (a)?(c) How long would your iron wire have to be to produce a 0.01 V drop along thelength of the wire, assuming the current you found in (a)?(d) How much power is lost through the iron wire (assume the length you find in (c))?arrow_forwardKindly answer all with clear calculations, othetwise leave it A steel ball of mass 3-kg is dropped from rest from the top of a building. If the air resistance is 0.013v and the ball hits the ground after 2.2 seconds, how tall is the building? Answer in four decimal places. A 3-kg object falls from rest in a viscous fluid. The resistance from which is 0.36v. What is the distance travelled by the object after 1 seconds? Answer in four decimal places. A steel ball of mass 3-kg is dropped from rest from the top of a building. If the air resistance is 0.013v and the ball hits the ground after 2.2 seconds, how tall is the building? Answer in four decimal places.arrow_forward
- current of 1.98 A when connected to the 220 V mains supply. If all the energy produced in 2.19 minutes is used to heat 2.08 kg of water, determine the rise in temperature of An electric heating device consumes the device. (Specific heat capacity of water = 4200 J kg1 K-1) Note: - Express your answer in 2 decimal places. - No need to include the unit in the answer field. - Final answer should be in °Carrow_forwardWhat is the resistance of a wire made of a material with a resistivity of 3.2 x 10 -8 if its length is 2.5 m and its diameter is 0.50 mm?arrow_forwardThe "lead" in your pencil is actually graphite, a form of carbon. If the 0.7mm diameter "lead" was actually made out of uranium and was 4.1 cm long, what would be it's resistance in 2 at 98 degrees C? (uranium resistivity p = 2.8 x 10^-7 Qm at 20 C and a = -2.61 x 10^-3 C^-1)arrow_forward
- Answer my physics question plz. A copper wire has a resistance of 50 ohms at 25°C (room temperature). The temperature coefficient of resistance for copper is approximately 0.0039 per °C. Calculate the new resistance of the wire when it is heated to 100°C.arrow_forwardA one-meter of annealed copper 2.5 cm in diameter is drawn until its resistance is100 times the initial resistance, its diameter afterward is?arrow_forwardA wire that is 24m long and has a radius of 0.34 mm has a resistance of 5.77 What is the resistivity of the material?arrow_forward