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3 years ago

How do two objects at different temperatures attain thermal equilibrium?

1 answer:

5 0

THERMAL EQUILIBRIUM
this state is called thermal equilibrium
when 2 bodies initially at different temperatures r brought together heat flows from the hotter body to colder body until both the bodies r at the same temperatures

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A Red Rider bb gun uses the energy in a compressed spring to provide the kinetic energy for propelling a small pellet of mass 0.

Kay [80]

Answer:

a.6.5025 J

b.6.5025 J

Explanation:

We are given that

Mass of pellet,m=0.27 g= $0.27\times 10^{-3} kg$

1 kg=1000 g

Spring constant,k=1800 N/m

x=8.5 cm= $8.5\times 10^{-2} m$

1m=100 cm

a.Potential energy stored in the compressed spring is given by

P.E= $\frac{1}{2}kx^2$

$P.E=\frac{1}{2}(1800)(8.5\times 10^{-2})^2$

$P.E=6.5025 J$

b.By using law of conservation of energy

P.E of spring=K.E of the pellet

K.E of the pellet=6.5025 J

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4 years ago

A student swings back and forth from position A to C, as shown. Which of the following happens when the swing moves from Positio

anygoal [31]

Answer:[] Both potential energy and kinetic energy of the student increase.

Explanation:

6 0

3 years ago

Read 2 more answers

Select each correct answer. If an object is moving, the amount of kinetic energy it has directly depends upon which of the follo

Jobisdone [24]

If an object is moving, the amount of kinetic energy it has directly depends upon which of the following factors?
- the object's mass
- the object's velocity

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3 years ago

Read 2 more answers

A grocery cart with a mass of 15 kg is pushed at constant speed along an aisle by a force fp = 12 n which acts at an angle of 17

Korolek [52]

Given:

Mass of cart: 15kg

Aisle length = 14m

Angle = 17° below the horizontal

Force fp = 12 N

So, the solution would be like this for this specific problem:

1) W(by applied force) = F(applied) x s x cosθ 
=>W(a) = 12 x 14 x cos17* = 160.66 J 

2) By F(net) = F(applied) - F(friction) 
=>As v = constant => a = 0 => F(net) = 0
=>F(applied) = F(friction)
=>W(friction) = -F(friction) x s
=>W(friction) = -F(applied) x s
=>W(f) = -12 x 14 x cos17* = -160.56 J 

3) 0, as the displacement is perpendicular to Force 

4) 0, as the displacement is perpendicular to Force

To add, the force that is applied to an object by a person or another object is called the applied force.

8 0

3 years ago

Is bath oil a homologenous mixture?

DaniilM [7]

Examples:
Air 
Blood 
Mouthwash 
Rubbing Alcohol 
Peroxide 
Hand-sanitizer 
Perfume 
Some bath gels 
Coffee 
Chicken or Beef Broth 
Body Spray 
Natural Oils 

A heterogeneous mixture is a mixture where the components of the mixture are not uniform or have localized regions with different properties. 

Examples: 
Rocks 
Oil and water 
Soup 
Pizza 
Copper sulfate 
Salsa 
Chicken soup 
Cottage cheese

hope that helped

5 0

3 years ago