Physics Answers

a car travels 36m/s, accelerates at 2m/s, find its final velocity in 5 seconds if its initial velocity is 10m/s

A force of magnitude 100N is directed westward and a second force of magnitude 200N is directed 60 degrees north of east. Find the magnitude and direction of the third force that when added to the first 2 forces gives a resultant whose magnitude is 150N and points 30 degrees north of east?

A heat pump is used for heating a building. It supplies 50,000 kJ/hr of heat to the building at 20°C. The outside air is at -5°C. Determine; a) the heat taken from outside air per hour, and b) the horsepower of motor required

The kinetic energy of a car is 8 ´ 10⁶ J as it travels along a horizontal road. How much power is required to stop the car in 10 s?

Show that this rearranges to q/m=v/BR

find the radius of the path of 35cl- ions in such a machine if v=3.0kv and b=3.0t

consider a slab with L=25cm A=90cm² and the metal is copper .T_H=125^oc and T_c=10^oc and steady state is reached,find the conduction rate through the slab.

Light is incident on a diffraction grating that has 300 lines /mm. A diffraction pattern is observed. The angle between the central maximum and second order maximum was measured to be 250 . Calculate the wavelength of the light.

a silica optical fiber with a core diameter large enough to be considered by ray theory analysis has a core refractive index of 1.50 and a cladding refractive index of 1.47.determine the critical angle at the core-cladding interface.

A bucket mass of 1 kg is whirled in a vertical circle of radius 1 m. How fast must the bucket move at the top of the circle so that the rope doesn't slack?