Sunlight shining in during daytime is absorbed by the floor

Reference no: EM134880

Q1. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C. If the house is well insulated, you may model it as losing energy by heat steadily at the rate 6 100 W on a day in July when the average exterior temperature is 4.00°C and while the conventional heating system is not used at all. Throughout the period between 5:00 p.m. and 7:00 a.m., the temperature of the house drops and a sufficiently large "thermal mass" is necessary to keep it from dropping too far. The thermal mass can be a large quantity of stone (with specific heat 850 J/kg . °C) in the floor and the interior walls exposed to sunlight. What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight?

Q2. Certain stars are thought to collapse at the end of their lives, combining their protons and electrons to form a neutron star. Such a star can be thought of as a giant atomic nucleus. If a star with a mass equal to that of the sun (of mass 1.99 × 10^30 kg) were to collapse into neutrons, what would be the radius of the star?

Respond in units of m.

Reference no: EM134880

Questions Cloud

Compute the frequency of this light : The alpha line in the Balmer series of the hydrogen spectrum consists of light having a wavelength of 6.56 ×10-7 meter. Compute the frequency of this light.

What is strength of the magnetic field necessary : At a right angle to a magnetic field. The acceleration of gravity is 9.81 m/s2. What is strength of the magnetic field necessary to exactly balance the weight of the proton and keep it moving horizontally.

Compute the lateral magnification of the sun : The Saturn's ring has a diameter of about 2.00x10^5km and the distance between the Earth and the Saturn is 1.40x10^9km. Based on your calculation on resolution power, will the ring be visible in telescope.

Find out the magnitude of the charge on the moving particle : Find out the magnitude of the charge on the moving particle. The baby soon learns to bounce with utmost amplitude and minimum effort by bending her knees at what frequency.

Sunlight shining in during daytime is absorbed by the floor : What mass of stone is necessary if the temperature is not to drop below 18.5°C overnight. Sunlight shining in during the daytime is absorbed by the floor, interior walls, and objects in the room, raising their temperature to 37.5°C.

Establish the components of the coyotes impact velocity : An aging coyote cannot run fast enough to catch a roadrunner. He purchases on eBay a set of jet-powered roller skates, which provide a constant horizontal acceleration of 15.0 m/s2. The coyote starts at rest 70.0 m from the edge of a cliff at the ins..

The cars motion can be divided into three different stages : The car's motion can be divided into three different stages: its motion before the driver realizes he's late, its motion after the driver hits the gas (but before he sees the police car), and its motion after the driver sees the police car. Which of ..

What is maximum amount of energy the incident electron lose : What is the maximum amount of energy the incident electron can lose in elastically in this collision? What is left over energy of the electron.

Evaluate the temperatures of a blue star and a blue jacket : Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h and returns at 62 km/h. Boat B goes across at 31 km/h, and its crew, realizing how far behind it is getting, returns at 93 km/h.

User Account

All Pages