What problem did thomas edison encounter after he invented the electric lightbulb?

A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 96.0 kg, and the hill is inclined at 17.0° with respect to the horizontal. Air resistance opposes the motion of the cyclist.

Two forces whose resultant is 100N, are perpendicular to each other. if one of them makes an angle of 60° with the resultant, calculate it's magnitude Calculate the absolute pressure of an ocean depth of 1200atm.

What is the frequency of a wave with a velocity of 21.2 m/s and a wavelength of 8.3m?

A model rocket is launched at an angle of 70° above the x axis, with an initial velocity of 40m/s. How far horizontally will the rocket travel? A. 32.8m B. 56.1m C. 104.9m D. 182.1m

If a boy (m = 50kg) at rest on skates is pushed by another boy who exerts a force of 200 N on him and if the first boy's final velocity is 8 m/s, what was the contact time?

Why does icing sugar dissolve more rapidly than granular sugar?

At t = 0 the components of a radio-controlled car's velocity are vx = 0.5 m/s and vy = 1.2 m/s. Find the components of the car's velocity at t = 4.

2) A window washer pulls themselves upward using a bucket pulley apparatus. A) How hard must pull downward to raise herself slowly at a constant speed? B) If she increases this force by 15%, what will her acceleration be?

A star with an original mass of 8 to 25 solar masses will ultimately become a? a) red giant b) white dwarf c) neutron star d) main sequence star

Racewalking involves more impact than running. true false