Q: After throwing his cell phone, Vhas Thed went to the playground and saw a ball. He kicked it at angl...
A:
Q: The heat of fusion of a substance is 80 cal/gr, so the heat required to melt 2 kg of the substance i...
A: Given data: Heat of fusion (Lf) = 80 cal/g Mass (m) = 2 kg = 2000 g Required: Heat (Q)
Q: The edges of a shocbox arc moasured to be 11.7 cm, 18.9 cm, and 29 cm. Determine the valume of the b...
A:
Q: A 2 kg frame is hung in a ceiling as shown. Find the tensions T, and T2 in the rope. ///// 40° T2 30...
A:
Q: Carry out the following arithmetic operations. (Enter your answers to the correct number of signific...
A: We have to find the sum, product (a) 578 is answer (b) 2.4 (c) 56.206
Q: Three forces act on a moving object. One force has a magnitude of 80.7 N and is directed due north. ...
A:
Q: (II) Two people, one of mass 85 kg and the other of mass 55 kg, sit in a rowboat of mass 78 kg. With...
A:
Q: 1. Draw the moment diagram tor girder PQRST and column BGLQ of the building frame. All columns have ...
A: Given a diagram and in the question we have ask to draw the moment diagram for girder PQRST and VGLQ
Q: A car accelerates from rest at 7.55 m/s2 for 4.25 s. Determine the final velocity of the car.
A:
Q: An object is moving along the a-axis. At t = 0 it has velocity voz = 19.0 m/s. Starting at time t = ...
A: Given that:- v0x=19 m/sax=-Ct m/s2C=? m/s3
Q: Given data Force 4 N Displacement=1 m Work done
A: Given data : Displacement=S Force=F To find : Work done
Q: 1. You are driving a late model convertible car at the 65 mph speed limit with its soft flexible roo...
A: Correct answer is option (c).
Q: 0raw FBDS Floor 4./17 you use a hoizontal forte of 30.ONto ISlide a 12.O-Kq wooden cruke across a lo...
A: 4.GivenHorizontal force actng on wooden crateF= 30.0 NMass of wooden Cratem=12.0 kg
Q: Determine the magnitude of force P acting on a 25kg crate that achieves a velocity of v 4 m/s when i...
A:
Q: A motorist travels 160 km at 80 km/h and 160 km at 100 km/h. What is the average speed of the motori...
A:
Q: The siren of a ambulance emits a frequency of 1700 Hz. A stationary observer detects a frequency of ...
A: Given that:- f=1700 Hzf'=1825 Hzv=343 m/svs=? Since, observed frequency is more than the actual freq...
Q: ON A CERTAIN DESERT LAND, A HORSE IS RUNNING AT A SPEED OF 60 MPH. HOW FAR BACK OF A STOP WAGON SHOU...
A: Given that:- Speed of horse=60mph
Q: What is the magnitude of the resultant of the following vectors? Vector A = 90 m, 35° N of W Vector ...
A: Given value--- Vector A = 90 m, 35° N of W Vector B = 45 m, 40° S of E We have to find--- What is...
Q: The first overtone produced by a pipe of length L1 that is open at both ends as the same frequency a...
A:
Q: 4. Two charged objects with charges q; = - 500 µC and q; = - 400 µC are placed 0.50 m with each othe...
A:
Q: 1. Compute for W1 to pull he block up 2. Compute for W1 to keep the block in position 3. If the surf...
A:
Q: 4. Which of the following properties of a cross product is FALSE? C, D, and E are vectors. I. C x D ...
A: 1. The Cross product of three vectors is A×B =ab sinθ nhere,n is the unit vectorA,B are vecotors....
Q: Two car horns have an average frequency of 420 Hz and a beat frequency of 40 Hz. What are frequencie...
A:
Q: A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the bl...
A: According to question we need to find--- Determine the power consumed by (a) the blow-dryer and (b)...
Q: There is a particle with mass m = 2 kg attached to a smooth wire that is positioned horizontally so ...
A: Force along the horizontal constraint Fx=Fcosθ(t)=Fcos0.2t+0.3
Q: A piece of metal was heated and placed in a calorimeter containing ice. Assuming no heat escapes the...
A:
Q: At what temperature is the Celsius scale reading equal to twice the Fahrenheit scale reading? a. -12...
A: Given TC = 2TF
Q: In the diagram below, each resistor has a resistance of 10 2 & the battery is 27 V. Determine I. R1 ...
A: Given data: Three resistors are connected in series R1 = R2 = R3 = 10 Ω Battery voltage (V) = 27 V ...
Q: 1. Raf rides a boat for a fishing trip at 6 kilometer south. After half hour of waiting, no fishes w...
A:
Q: The best leaper in the animal kingdom is the puma, which can jump to a height of 12.7 ft when leavin...
A:
Q: Convert the [100] direction into the four-index Miller-Bravais scheme for hexagonal unit cells. Show...
A: In this question we have to convert the direction into four-index Miller-Bravais scheme. Please give...
Q: A nonuniform electric field is directed along the x-axis at all points in space. This magnitude of t...
A:
Q: 1. What is the value of the charge on each plate of a 0.06 µF capacitor when the potential differenc...
A:
Q: Calculate the speed of a satellite moving in a stable circular orbit about the Earth at a height of ...
A: Given value--- height = 4800 km. We have to find--- speed of satellite?
Q: 3. If 52 nC of charge are moved through a 53 Vpotential difference, determine the change in potentia...
A: Given data: Charge (q) = 52 nC = 52×10-9 C Potential difference (ΔV) = 53 V Required: The change in...
Q: 2.1 The viscosity of N20 is reported to be 4500 x107 Poise at 45 atm and 52 °C. Estimate the wiscosi...
A: Given that:- Viscosity at 45atm and 52°C=4500×10^-7 poise
Q: Part A A subway train starts from rest at a station and accelerates at a rate of 1.60 m/s? for 14.0 ...
A:
Q: A 5.0-kg object is pulled along a horizontal surface at a constant speed by a 12-N force acting 300 ...
A: Given data: Force (F) = 12 N Angle (θ) = 30° above the horizontal Distance (s) = 8.0 m Required: W...
Q: A car accelerates from rest at 7.55 m/s2 for 4.25 s. Determine the final velocity of the car.
A:
Q: The density of brass is 8.7 ax 10° kg/m. What is the mass of a 3.2 x 10- m3 sample of brass ? O 3.68...
A:
Q: 13. (Ch 5) You are holding a book against a wall by pushing up at an angle with your hand. Your push...
A: 13. Given: mass of book = m angle = θ coeff. of static friction =μ
Q: A car accelerates from rest at 7.55 m/s2 for 4.25 s. Determine the final velocity of the car.
A: Given Initial velocity of car u = 0 m/s Acceleration of car a = 7.55 m/s2 Time taken t = 4.25 s To ...
Q: 10 kg of water at 80 °C is mixed with 5 kg of water at 20 °C. The final temperature of the mixture ...
A:
Q: A car is parked on a cliff overlooking the ocean on an incline that makes an angle of 21.0° below th...
A: Image_1
Q: Find acceleration
A: Given data : Initial velocity=U Final velocity=V Time=t Required : Acceleration
Q: Figure 22-40 shows an electric dipole. What are the (a) magni- tude and (b) direction (rèlative to t...
A:
Q: When a projectile reaches the highest point the horizontal component of the acceleration is: E) N...
A: Given data: A projectile motion Object at highest point Required: The horizontal component of the a...
Q: What must be the distance between the charge q1 =+3 microCoulombs and q2 - 1.5 microCoulombs for the...
A: The given data The charge q1 = +3μC = +3×10-6 C The charge q2 = -1.5μC = -1.5×10-6 C The electro...
Q: 3. Three point charges are q, = -5.0 mC, q2 = -55 µC and q, = +70 pC are placed at the vertices of a...
A: q1 = -5 mC q2 = - 55 μC q3 = 70 μC side (d) = 0.25 m
Q: Q1. A golfer strikes a golf ball of mass 0.05 kg, and the time of impact between the golf club and t...
A:
Step by step
Solved in 3 steps
- How does the resistance for copper and for silicon change with temperature? Why are the behaviors of these two materials different?Using your understanding of the nature of internal energy and temperature, explain why we might expect the resistance of a solid to increase if its temperature increases.Do impurities in semiconducting materials listed in Table 9.1 supply free charges? (Hint Examine the range of resistivity for each and determine whether die pure semiconductor has the higher or lower conductivity.)
- Name two applications for superconductivity listed in this section and explain how superconductivity is used in the application. Can you think of a use for superconductivity that is not listed?The resistivity of an ohmic material depends on ______. * 1 p A. Resistance B. Length of the conductor C. Cross-section Area of the conductor D. Nature of the material (composition) O A,B,&C OB & C O A & D O D2. An Iron wire at 0 Celcius has resistivity Ro. At which temperature the resistiv- ity of this wire will be 1.2Ro. You can find the value temperature coefficients of resistivity from Table 25.2 from your book. Explain the physical mechanism of rising resistivity by the rising temperature.
- 6) In recent class lectures, we discussed the temperature dependence of the electrical resistivity, p(T) for the three main classes of materials that conduct an electrical current; conductors, semiconductors, and superconductors. In the graph below, draw in by hand examples of the temperature dependence of the electrical resistivity, pT), for each material type. Give at least one example of each material type. plT) + +>T(K) 100 200 3003. The resistance of a copper wire with circular cross section of radius a and length L is R. If we melt this wire and reshape it into a wire with square cross section of side a, what would be the resistance of the new wire? Present your answer symbolically.At the same temperature, two wires made of pure copper have different resistances. The same voltage is applied at the ends of each wire. The wires may differ in ( check all that apply) _ a. length _b. cross-sectional area _c. resistivity _d. amount of electric current passing through them Hint 1) The resistivity of a metallic conductor, such as copper, nearly always increases with increasing temperature. Hint 2) For an ohmic conductor, that is, a conductor such as copper that obeys Ohm's law, the resistance R is proportional to the length L and inversely proportional to the cross-sectional area A. That is, R=ρL/A where ρ ie. rho, is the resistivity of the material. Note that ρ is a characteristic of the specific material and may vary with temperature. Hint 3) Ohm's law tells us that the potential difference V between the ends of a conductor is equal to the product of the current I through the conductor and the conductor's resistance R, V=IR
- 1. What is the voltage drop across each device? I=VR2. What is the current in the resistor [6-ohm]? Note: Draw another schematic showing combinations of resistance [if there is any]What statement is true? Select one: Oa. Resistance depend only on resistivity. Ob. Resistance depend on type of material. Resistance is directly proportional to cross section area of wire. Od. Resistivity has a unit of Qm.Material= Lead Resistivity (Ω.m) = 22 x 10- 8 a) Calculate the conductivity of your material. Compare the conductivity of your material with conductivity of glass having a resistivity of 3.0 x 1010 Ω.m. b) Suppose that you have a cylinder that is made of your material with a length of l=20.0 cm and a crosssectional area of A=4.00x10-4 m2 . Calculate the resistance, R, of the cylinder. c) A 9.0-V battery is connected to the cylinder that is made of your material in part-b. Using Ohm’s law calculate the current passing through the material. (V=I*R I=?) d) Suppose that the cylinder in part-b is cut into four equal pieces. Calculate the resistance of one piece of cylinder (which has a length of one fourth of the original length l) and compare your result with the original cylinder with length l.