Other Physics Answers

A rocket, initially at rest, is fired vertically with an upward acceleration of 10m/s². At an altitude of .50km, the engine of the rocket cuts off. What is the maximum altitude it achieves?

The velocity of particle moving along x axis is given T>0 by V_x=(32.0t-2.00t³)m/s. Where t is in s. What is the acceleration of the particle when (after t=0) it achieves its maximum displacement in the positive x direction?

a sheet of polythene(er=1.3) and 0.5mm thickis to be used in capacitor by sandwiching it two sheet of aluminum foil.what area must sheets have if the capacitor is to have a capacitance of 5micro farad?Eo=8.85*10"-12F/M

What is the average speed (m/s) of a sprinter who runs 10.5 meters in 16.5 seconds? 

A body of mass 40g is suspended from the end of a spiral spring whose force constant is 0.8N/m if it excited simple harmonic motion and has an amplitude of 0.3m calculate the total energy of the system

1. What pressure must be exerted on air in a cylinder to compress its volume of 0.105 L at 755 mmHg to a volume of 1.00 mL?

Using the triboelectric series, identify which of the two materials will become negatively charged if charged by friction.

1. Gold and Silk

2. Fur and Aluminum

3. Polyethylene and Cling Film

4. Cotton and Glass

5. Acetate fiber and Teflon

6. Brass and Silicon

7. Steel and Wood

8. Polyester and Copper

9. Silver and Gold

10. Nylon and rubber

    An athlete is sitting unclothed in a locker room whose dark walls are at a temperature of 15^oC. Estimate the rate of heat loss by radiation, assuming a skin temperature of 34^oC and e = 0.70. Take the surface area of the body not in contact with the chair to be 1.5 m².

       σ = 5.67 x 10^-8 W/m².K⁴

A cup is made from 200 g of silver and contains 200 g of water. Both cup and water are at room temperature (24^oC). A 40-g piece of unknown material is heated to 85^oC and then added to the water. The heat released to the environment by the cup, water, and object system is negligible. After achieving thermal equilibrium, all three objects have a temperature of 25^oC. What is the specific heat of the unknown material?1.      For water, c = 4186 J/kg.C^o. For silver, c = 235 J/kg.C^o

The volumetric thermal expansion of materials are:

Aluminum: β = 75 x 10-6/Co

Copper: β = 50 x 10-6/Co

Brass: β = 56 x 10-6/Co

Water: β = 210 x 10-6/Co

Three containers of equal volume, each made from one of the three metals, were filled with water at room temperature and brought to boil. In which container will there be more water that will spill over?