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mojhsa [17]
3 years ago
9

Why does an ice cube melt in your hand? Question 3 options: The ice remains in a solid state even though heat is applied The tem

perature of the ice is greater than the temperature of your hand Sound energy creates vibrations which make the ice melt Heat is transferred from your hand to the ice making it melt
Physics
2 answers:
Anna007 [38]3 years ago
8 0

Answer:

C

Explanation:

iVinArrow [24]3 years ago
6 0

Answer:

3rd choice

Explanation:

heat is transfered causing it to melt

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A particle moving on a circle has a velocity of 5 m/s and a normal acceleration of 10 m/s^2. What is the radius of the circle?
dybincka [34]

Answer:

Radius of the circle will be 2.5 m

Explanation:

We have given velocity of particle moving in the circle v = 5 m/sec

Acceleration of particle in the circle a=10m/sec^2

We have to find the radius of the circle

We know that acceleration is given by a=\frac{v^2}{r}

So 10=\frac{5^2}{r}

r=\frac{25}{10}=2.5m

So radius of the circle will be 2.5 m

3 0
4 years ago
Considering this analogy (current = rate that heat flows through a window, and voltage = temperature difference across the windo
erastovalidia [21]

Answer:

Explained

Explanation:

Resistance R in a current flow through an object is given by

R= \frac{\rho L}{A}

ρ = resistivity of the material

L= length of the object

A=  area of cross section

clearly resistance is directly dependent on length of the object.This means greater the length larger will be resistance to current.

thermal resistance R_th is given by

R_{th} = \frac{L}{KA}

L= length of the object

A=  area of cross section

K = Conductivity of the material

thermal resistance is also is directly dependent on length of the object.This means greater the length larger will be resistance to current.

8 0
3 years ago
Read 2 more answers
Shanika is an engineer at an amusement park who is experimenting with changes to the setup for a magnetic roller coaster ride. I
Whitepunk [10]

Answer:

I believe it might be point A since the question ask what will result in the ln a largest increase in potential energy

Explanation:

8 0
3 years ago
Based on the most widely accepted scientific explanation, elements began to form shortly after the big bang. Which of the follow
worty [1.4K]
Big Bang is a theory that, as stated above, has grown to become widely acceptable scientific explanation of the origin of things. Research would say that according to this theory, the Earth originated billion years ago through an explosive of a highly energized point.

Through this explosion, the elements were formed. However, only the lightest of the elements including hydrogen and helium, with traces of lithium and beryllium. From the choices, the answer would have to be the second choice, helium.

Answer: B. helium
5 0
3 years ago
Read 2 more answers
Which of the following is NOT part of a circuit?
uysha [10]
I believe it’s a. Rim
5 0
3 years ago
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