Physics Answers

Calculate the steady state temperature of a tungsten bulb rated 1Kw,it's filament length is 50cm and radius 0.1mm, assumed it to be a black body

Whiplash usually occurs in [Best answer]

motor vehicle collision.

A.

Head-on

B. Rear-end

C. Roll-over

D. Rotational

A vehicle travelling along a street skidded on an icy patch and hit a roadside barrier the time interval of the impact was 0.955 seconds during which the barrier exerted a force of 505 and what is the magnitude of the change in momentum from the vehicle

A motorbike goes uphill from point A to point B and down to point C takes 32.5(seconds). Know that during the movement of the car, the wind continuously creates a thrust of 1.4N. The coefficient of friction between the wheel and the road surface is constantly changing and decreasing as a function of μ=0.05e^(-0.05t), t in seconds. If the initial speed of the car at A is 2.5 times the speed of the car at B and 1.5 times the speed at C and the distance AC=158m, the angle of inclination between AB and the road surface at C is 30°, then the distance AB must be long. How many meters at least?

Calculate the ratio of the critical angle of diamond to the critical angle of crown glass if both are surrounded by a vacuum.

A car traveles at a constant speed of 37km/hr round of curve of radius 300m find how long it will take to turn through 180 degree of Arc.

A soccer player kicks a rock horizontally off a 31.0 m high cliff into a pool of water. If the player hears the sound of the splash 3.4 seconds later, what was the initial speed given to the rock? Assume the speed of sound in air to be 343 m/s.

Explained the Millikan experiment oil drop

In the wake of the April 1986 accident at the Chernobyl nuclear power plant, large quantities of radioactive material rose over a kilometer from the force of the explosion and fire. The winds carried the β ^- -active cesium-137 isotope to Europe.

a) Write the nuclide degradation reaction.

b) Calculate the decomposition energy of cesium.

You’re traveling 45 km at 30o north east, then 98 km at 50o north west. What is your resultant displacement?