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katen-ka-za [31]
3 years ago
13

How does a foam-filled winter coat help keep a person warm?

Physics
2 answers:
Neko [114]3 years ago
5 0
It slows down the transfer of thermal energy from inside to outside the coat.
Margarita [4]3 years ago
3 0

Answer: the answer is B. It slows down the transfer of thermal energy from inside to outside the coat

Explanation: I took the test and got this right:) Hope this helped!!

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In a softball game, a batter hits the ball at the velocity and angle shown
Kipish [7]
This problem is going to be pretty long to solve. So, prepare.

We’re interested in the change in our x position. So we have to break the velocity vector up into its components. Do cosine of 50 and then multiply by the magnitude of the velocity. I got 20.57m/s. That’s our initial velocity. And remember, horizontal acceleration is zero. The vertical acceleration, or any vertical component, has no effect on the horizontal components. In order to solve this problem, we want to utilize this equation:
Change in x-position = Vix*t

Let’s solve for time, which is dependent on the vertical components. The projectile will stop when it vertically hits the ground. Generally you want to use this equation for solving for time:
Yf = Yi + Viy*t + 1/2at^2
We didn’t solve for the vertical component yet, so let’s do that now. (Sine of 50)*(32) = 24.51m/s
Let’s now plug everything in:
0 = 0 + 24.5t - 4.9t^2
0 = 24.5t - 4.9t^2
0 = t(24.5 - 4.9t)
-24.5 = -4.9t
t = 5 seconds

The hard stuff is pretty much over. Put that 5 seconds into the other equation I said we wanted to use to solve the problem
Change in x-position (range) = (20.57)*(5)
= 102.85 meters

Answer B
5 0
4 years ago
A force acts on an object. Which option describes an action that could prevent the object from moving
Naya [18.7K]

Answer:

Friction or tension

Explanation:

Friction stops an object from moving in the presence of force

7 0
3 years ago
Determine the farthest away a car can be at night so that your eyes can resolve the two headlights. Assume that the the diameter
Zigmanuir [339]

Answer:

The farthest distance is L_{max}=11.48 km

Explanation:

The angular resolution is mathematically represented as

              \theta = \frac{Z}{L} = \frac{1.22 \lambda}{d}

Where Z is the distance between the car head lamp with a value Z = 1.4 m

L is the distance between the eye and the car

\lambda is the wavelength  with a value 500 nm = = 500 *10^{-9}m

d is the diameter of the eye with a value  d = 0.50 cm = = \frac{0.50}{100} = 0.005m

   The maximum distance L_{max} is given as

              L_{max} = \frac{(1.4) *0.005}{1.22 * (500 *10^{-9})}

                       = 11.48*10^{3}m

                        =11.48 km

             

rrrrrrr

8 0
4 years ago
Importance of SI system in points​
monitta

Answer:

SI unit is an international system of measurements that are used universally in technical and scientific research to avoid the confusion with the units. Having a standard unit system is important because it helps the entire world to understand the measurements in one set of unit system.

4 0
3 years ago
According to the diagram which way is the magnetic field pointing ?
Andru [333]

Left. Use right hand rule. Have hand wide open. Thumb points in direction of current.(which makes right angle with your index finger) Four fingers in direction of magnetic field and your palm should point in the direction of the force

5 0
3 years ago
Read 2 more answers
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