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A 0.20 kg mass attached to the end of a spring is whirled in a vertical circle by a student. At some positions, the mass experiences a downward force of -60j N and a horizontal force 38i N. Determine it's acceleration in this position.
A 10m long clothesline
Draw an electrical circuit diagram of resistors R1 and R2 connected in series, and resistor R3 connected in parallel with R2.
A body having a net charge of 30C is placed in a uniform electric field of 800N/C directed vertically. What is the mass of this body if it lies on the surface in the field?
calculate the rate of heat conduction out of the human body, assuming that the core internal temperature is 37.0°C, the skin temperature is 34.0°C, the thickness of the fatty tissues between the core and the skin averages 1.00 cm, and the surface area is 1.40m²
4. Specific Heat. A 900-g brass at 100 o C is dropped into a 2.27-kg water at 1.60oC. When mixed, the equilibrium temperature is 5.10 oC. Find the specific heat of brass. (specific heat of water = 1.00 cal/g∙C0)
5. First Law of Thermodynamics. You do 10,000 J of work on a system of 3.00 kg water by stirring it with a paddle wheel. During this time, 10,000 calories of heat is added. What is change in the internal energy of the system? (1 calorie = 4.18 Joules)
1. Temperature. What are the values of temperature at different temperature scales for SATP (Standard Ambient Temperature and Pressure)? Show the conversion of units from Celsius to Fahrenheit and Celsius to Kelvin.
2. Linear Expansion. What is the increase in length of steel that is 10 m long at 5.0oC when its temperature rises to 30oC? The coefficient of linear expansion of steel is 1.2 x 10-5/C0.
3. Heat. How much heat is necessary to raise the temperature of 1000 g of ethanol from 20oC to 80oC? The specific heat of ethanol is 0.750 cal/g∙C
A thousand projectile electrons, all with the same initial kinetic energy, are shot at a block of gold (Z = 79). This causes the production of x-ray photons in the gold. Explain why the resultant x-ray photons would be of a wide range of energies rather than all photons being of the same energy. (4 marks)
A particle with a charge of -1.24x10^8 C is moving with instantaneous velocity (1.49x10^4m/s) î +(3.85x10^4m/s) ĵ. What is the force exerted on this particle by a magnetic field
(a) (1.40T)î+ (2.30T)k̂
(b) (-1.25T)î+ (2.00T)ĵ + (-3.50T)k̂
A convex mirror has a focal length of -0.5 m. An object is 2.0 m in front of the mirror. Where is the image formed?
