The farther a person is from a light bulb the less intense, Ask an Expert

Academics

The farther a person is from a light bulb, the less intense its light. The equation 1=19/4d² approximates the light intensity from a 60-watt light bulb at a distance of d meters, where 1 is measured in watts per square meter.

(A) Find 1 for d=2 meters and interpret the result.

(B) The intensity of light from a 100-watt light bulb is about 1 =32/ad². Find an expression for the sum of intensities of light from a 100-watt bulb and a 60-watt bulb.

View complete question

Physics, Academics

Category:- Physics
Reference No.:- M91676834

Have any Question?Write your Review or question?

Related Questions in Physics

Part a find leslies average speed when she runs to the

PART A: Find Leslie's average speed when she runs to the store 14 km away in 24 min Express your answer to two significant figures and include the appropriate units. PART B: How fast is this in m/s? Express your answer t ...

Question resistor color codes what is the resistance of a

Question: Resistor color codes: What is the resistance of a resistor with the band colors Green Blue Brown? What is the resistance of a resistor with the band colors Red Green Black? What colors would you see on a 75 k o ...

Question a radar station locates a sinking ship at range

Question: A radar station locates a sinking ship at range 17.9 km and bearing 136Â° clockwise from north. From the same station, a rescue plane is at horizontal range 19.6 km, 156Â° clockwise from north, with elevation 2 ...

Question one day when you come into physics lab you find

Question: One day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. Each lab group is challenged to determine the heaviest rock that can be placed in the bo ...

Question a rock thrown with speed 105 and launch angle

Question: A rock thrown with speed 10.5 and launch angle 30.0(above the horizontal) travels a horizontal distance of = 18.0before hitting the ground. From what height was the rock thrown? Use the value = 9.810 for the fr ...

Question to take off from the ground an airplane must reach

Question: To take off from the ground, an airplane must reach a sufficiently high speed. The velocity required for the takeoff, the takeoff velocity, depends on several factors, including the weight of the aircraft and t ...

Question the specific heat capacity of water is 4190 jkg k

Question: The specific heat capacity of water is 4190 J/kg K, its heat of melting is 3.33 x 10^5 J/kg, and its heat of vaporization is 22.6 x 10^5 J/kg. For 1 kg of water, which of the following requires the most thermal ...

Question a rifle with a barrel length of 57 cm fires a 11 g

Question: A rifle with a barrel length of 57 cm fires a 11 g bullet with a horizontal speed of 370 m/s . The bullet strikes a block of wood and penetrates to a depth of 12 cm . 1- What resistive force (assumed to be cons ...

Question what potential difference is needed to accelerate

Question: What potential difference is needed to accelerate a He+ ion (charge +e, mass 4u) from rest to a speed of 1.8 x 10 6 m/s? Express your answer using two significant figures. The response must be typed, single spa ...

Question part a find the energy u0 stored in the capacitor

Question: Part A: Find the energy U0 stored in the capacitor. Express your answer in terms of A, d, V, and Ïµ0. Remember to enter Ïµ0 as epsilon_0. Part B: The capacitor is now disconnected from the battery, and the plat ...

4,153,160 Questions Asked
13,132 Experts
2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Recent Questions

Ask Physics Expert