Why is using two thin blankets in bed usually warmer than one thick one?

Answers

Answer 1

Answer: Air pockets. Between two blankets, a pocket will form. Then, it will heat up along with the body heat.

Answer 2

Answer: i think it is because a big thick blanket has more room in it. if you have two thin blankets there isn't a whole lot there so it keeps the warmth in.

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An object with a mass of 1.5 kg changes its velocity from +15 m/s to +22 m/s during a time interval of 3.5 seconds. What impulse was delivered to the object? 3.0 N • s 11 N • s 25 N • s 56 N • s

Answers

Answer: The impulse delivered to the object is 33 N • s.

Explanation: Impulse = Change in momentum

The momentum of an object is calculated by multiplying its mass by its velocity:

Momentum = Mass x Velocity

Given:

Mass of the object = 1.5 kg

Initial velocity = +15 m/s

Final velocity = +22 m/s

Time interval = 3.5 seconds

First, we need to calculate the change in momentum:

Change in momentum = Final momentum - Initial momentum

To find the initial momentum, we multiply the mass by the initial velocity:

Initial momentum = Mass x Initial velocity

Initial momentum = 1.5 kg x 15 m/s

To find the final momentum, we multiply the mass by the final velocity:

Final momentum = Mass x Final velocity

Final momentum = 1.5 kg x 22 m/s

Now, we can calculate the change in momentum:

Change in momentum = Final momentum - Initial momentum

Change in momentum = (1.5 kg x 22 m/s) - (1.5 kg x 15 m/s)

Simplifying the equation:

Change in momentum = 33 kg m/s

Finally, we have found the change in momentum, which is equal to the impulse delivered to the object. Therefore, the impulse delivered to the object is 33 N • s.

Answer:

11 Ns

Explanation:

Impulse = change in momentum

J = Δp

J = mΔv

J = (1.5 kg) (22 m/s − 15 m/s)

J = 10.5 kg m/s

Rounded to two significant figures, the impulse is 11 Ns.

A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1.25 cm and is 1.50 mm thick. The density of brass is 8599 kg/m3. If you put this washer on a laboratory balance, what will it "weigh" in grams?

Answers

We will find the mass from
mass = density x volume
We are told the density and must find the volume from the dimensions given
the volume of the washer will be the area x thickness (remembering to convert all measurements to meters)
if the washer had no hole, its area would be pi (0.0225m)^2 (remember to convert to meters and to use radius)
the area of the hole is pi(0.00625m)^2
so the area of the washer is pi[(0.0225m)^2 - (0.00625m)^2] = 1.5x10^-3 m
the volume of the washer is 1.5x10^-3 m x 1.5x10^-3 m = 2.25x10^-6 m^3 (the thickness of the washer is 1.5 mm = 1.5x10^-3m)
thus, the mass of the washer = 8598kg/m^3 x 2.25x10^-6m^3 = 0.0189kg = 18.9 grams

The big bang theory is one of the most accepted theories on the origin of the universe because of scientific evidence, such as _____.

Answers

Answer:

Movement of Galaxies away from us.

Explanation:

Big Bang theory is the most widely accepted theory which says that the universe started with a huge expansion, it was not an explosion. By that logic everything must be moving from each other even today. This was proved by observing the Redshift in the spectrum of the galaxies which means that they are moving away from us.

The big bang theory is one of the most accepted theories on the origin of the universe because of scientific evidence, such as d: distant, exploding quasars were found

List 3 examples behaviors of solid and the 3nwrgy associated with them

Answers

Answer:

retains a fixed volume and shape

rigid - particles locked into place

not easily compressible

little free space between particles

does not flow easily

rigid - particles cannot move/slide past one another

Explanation:

Sure! Here are three examples of behaviors of solids and their associated energies:

1. Behavior: Solids have a definite shape and volume.
Energy: Solids possess potential energy due to the arrangement of their particles.

2. Behavior: Solids are rigid and maintain their shape when subjected to external forces.
Energy: Solids exhibit elastic potential energy when deformed and can store mechanical energy.

3. Behavior: Solids have a fixed melting point at which they transition to a liquid state.
Energy: Solids require thermal energy (heat) to overcome intermolecular forces and transition to a liquid state.

Two diverging light rays, originating from the same point, have an angle of 5° between them. After the rays reflect from a plane mirror, what is the angle between them? Construct one possible ray diagram that supports your answer.

Answers

Answer:

5°

Explanation:

Two diverging light rays, originating from the same point, have an angle of 5° between them.

According to laws of reflection the angle of incidence is equal to the angle of reflection.

From the attached figure, it is clear that the after reflection from a plane mirror the angle between two rays will be 5°.

O be the originating point. m and n two diverging light rays. When they strikes at the plane mirror, the laws of reflection still fulfilled.

A bowl contained 19.1 grams of salt. Then, Kaitlin poured in another 77.49 grams. How much salt does the bowl contain now?

Answers

the bowl contains 96.59 grams now :)

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