When you sit indoors near a window on a sunny day your skin gets warm how does this happen?F. The Suns energy reaches your skin as radiation.
G. Heat from the sun reaches your skin by conduction.
H. The Suns energy is conducted to your skin by the glass
I. Heat from the room is reflected from the Windows onto your skin

Answers

Answer 1

Answer: Well, we know it's NOT I., because only LIGHT gets reflected.
We know it's NOT G., because conduction requires some pathway that actually CONNECTS to us, and a window can't "connect" to us.
H. is the same reason as G., and the problem didn't state that it touches or "connects" to us.
So that leaves only to A., and YES, it could reach our skin through radiation!
I hope I helped! =D

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What do you mean by a unit?
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unit or a derived unit.
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Answers

Answer:

1)the unit of work is joule. 2)it is derived unit because it is made by two different unit force and displacement .3)

What is the time required for an object startingfrom rest to fall freely 500. meters near Earth’s
surface?
(1) 51.0 s (3) 10.1 s
(2) 25.5 s (4) 7.14 s

Answers

The time required for an object starting from rest to fall freely 500. meters near Earth’s is 10.1 s

Without air resistance Distance = 1/2 g T²

500 m = (1/2) (9.8 m/s²) (T²)

500 m = (4.9 m/s²) (T²)

Divide each side by (4.9 m/s²)

T² = (500 m) / (4.9 m/s²)

= 102.04 s²

T = √ (102.04 s²)

T = 10.1 seconds

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(3) 10.1 second Using equation of motion 500 = (0.5)(9.81)t^2. Rearranging, t = sqrt(1000/9.81) = 10.1s

4. A 1500 kg car is rolling at 2.0 m/s. You would like to stop the car by firing a 10 kg blob ofsticky clay at it. How fast should you fire the clay?

Answers

The clay must be 300 m/s fast in other to stop the car.

For the car to stop, The momentum of the car must be equal to the momentum of the clay.

Formula:

MV = mv................. Equation 1

Where:

M = mass of the car
V = Velocity of the car
m = mass of the clay
v = velocity of the clay

Make v the subject of the equation.

v = MV/m................... Equation 2

From the question,

Given:

M = 1500 kg
V = 2 m/s
m = 10 kg

Substitute these values into equation 2

v = 1500(2)/10
v = 300 m/s.

Hence, The clay must be 300 m/s fast in other to stop the car.

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Final answer:

To stop the car rolling at 2.0 m/s with a blob of clay, you should fire the blob of clay at a speed of 300 m/s. This is based on the principle of conservation of momentum.

Explanation:

The question involves a principle of Physics called the law of conservation of momentum. The law states that the total momentum of a system remains constant if no external forces act on it. Here, the car and the clay are the two objects in the system.

At the start, only the car has momentum, which can be calculated with the equation: momentum = mass x velocity => momentum of car = 1500 kg x 2 m/s = 3000 kg m/s.

After the clay is fired at the car, the total momentum of the system (car + clay) still remains 3000 kg m/s, but now the momentum is shared between them. We want to stop the car, so it will now have no momentum, meaning all momentum must be with the clay.

The equation again turns to momentum = mass x velocity => velocity = momentum/mass => velocity of clay = 3000 kg m/s / 10 kg = 300 m/s.

You should fire the clay at 300 m/s to stop the car.

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This is false. Say you have a food chain where a monkey is the top predator. Then you introduce something that eats what the monkey does. The monkey populations will plummet and that means that the things they eat will start to get more numbers. Adding and subtracting animals throws everything out of order.

Removing any level from an ecosystem disrupts a delicate balance that may have ;and a diverse, with many levels and intricate relationships between organisms. More predators kill more prey, which, along with food scarcity, decreases the an attempt to control the population, but it had no effect on habitat degradation.

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Sensory adaptation is when the sensory receptors change and adapt to different stimuli. For example in a darkened room your pupils enlarge allowing more of the available light in. This is why you can see a little better in the dark after you get used to it.

Sensory adaptation is a phenomenon in which sensory neurons change their level of sensitivity to a constant stimulus over time. This adaptation allows people to adapt to their environments while balancing the need to receive new sensory input. Neurons involved with smell, hearing, taste, touch, and sight can all exhibit this phenomenon.

An organism that breaks down other living things when they die

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