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3 years ago

Will give 20 points!!!

2 answers:

3 0

D hear is Heat is the transfer of kinetic energy from one medium or object to another, or from an energy source to a medium or object. Such energy transfer can occur in three ways: radiation, conduction, and convection.

arsen [322]3 years ago

3 0

Answer:b

Explanation:

total energy of a matter=Kinetic energy of all particles+all other energies of all particles

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How much work does a football player do in the weight room when he squats 150 kg up a distance of 1 meter?

Zielflug [23.3K]

Answer:

See below

Explanation:

The work done equals the increase in Potential Energy

PE = mgh

= 150 * 9.81 * 1 = <u>1471.5 j</u>

3 sets of 10 is 30 times this = <u>44145 j</u>

3 0

2 years ago

Cart A, with a mass of 0.20 kg, travels on a horizontal air trackat 3.0m/s and hits cart B, which has a mass of 0.40 kg and is i

inysia [295]

Answer:

$\large \boxed{\text{C. 2.3 m/s}}$

Explanation:

Data:

$m_{\text{A} } = \text{0.20 kg};\,v_{\text{Ai}} = \text{3.0 m/s}\\m_{\text{B} } = \text{0.40 kg};\,v_{\text{Bi}} = \text{2.0 m/s}\\$

Calculation:

This is a perfectly inelastic collision. The two carts stick together after the collision and move with a common final velocity.

The conservation of momentum equation is

$\begin{array}{rcl}m_{\text{A}}v_{\text{Ai}} +m_{\text{B}} v_{\text{Bi}}&=&(m_{\text{A}} + m_{\text{B}})v_{\text{f}}\\0.20\times 3.0 + 0.40\times 2.0 & = & (0.20 + 0.40)v_{\text{f}}\\0.60 + 0.80 & = & 0.60v_{\text{f}}\\1.40 & = & 0.60v_{\text{f}}\\v_{\text{f}}&=& \dfrac{1.40}{0.60}\\\\& = & \textbf{2.3 m/s}\\\end{array}\\\text{The centre of mass has a velocity of $\large \boxed{\textbf{2.3 m/s}}$}$

3 0

3 years ago

A reaction where one element takes the place of another element in a compound is an example of which type of reaction?

yKpoI14uk [10]

Answer:

single-replacement

A single-replacement reaction is a chemical reaction in which one element replaces another in a compound.

Explanation:

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4 0

3 years ago

Suppose we replace both hover pucks with pucks that are the same size as the originals but twice as massive. otherwise, we keep

kvv77 [185]

This pair of pucks will rotate at the same rate.

Further Explanation:

Hover Puck:

The Hover Puck coasts effectively on a self-produced pad of air until followed up on by an outside power.

Employments of hover puck:

The Hover Puck coasts effectively on a self-produced pad of air until followed up on by an outside power.

• Use one Hover Puck to show themes from Newton's First Law to impacts to reflection.

• Use at least two pucks to examine the protection laws in two measurements.

• Set up a bowling alley utilizing plastic beverage bottles.

Innovation of hover puck:

The First Rubber Hockey Pucks Were Made From Sliced-Up Lacrosse Balls. At the point when the game moved inside, entire balls were initially utilized, yet arena proprietors before long thought that it was desirable over cut them into thirds and keep the center segment. This fundamental plan was the standard by 1885.

hockey puck was developed:

The hockey puck appeared in 1875. It's hazy who really imagined it. Specialists accept the main hockey puck was likely only an elastic ball cut down the middle. This gave players an article with a level side that would slide over the ice.

Subject: physics

Level: High School

Keywords: Hover Puck, Employments of hover puck, Innovation of hover puck, hockey puck was developed.

Related links:

Learn more about evolution on

brainly.com/question/727976

brainly.com/question/6953278

5 0

4 years ago

Read 2 more answers

bonufazy [111]

Answer: