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larisa [96]
3 years ago
9

What best describes the energy in a closed system at the beginning of a day and the energy at the end of the same day? Check all

that apply.
Some energy can disappear after it has caused motion.
Some energy can be changed from one form to another.
Some energy can be lost to the environment around the system.
The total initial energy will be equal to the total final energy.
The total initial energy will be greater than the total final energy.
Friction can cause energy to be destroyed during the day.
Friction can cause the amount of thermal energy to increase.
Physics
2 answers:
jeka943 years ago
6 0
The second, fourth, and seventh answers apply. Energy in a closed system is conserved, but it can change form
Tanya [424]3 years ago
6 0
<h2>Answer:</h2>

The options which are apply on it;

2. Some energy can be changed from one form to another.

4. The total initial energy will be equal to the total final energy.

7.Friction can cause the amount of thermal energy to increase.

Energy can not be created or destroyed it can only be converted from one form to another.

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Robbie found a rock in a stream. The rock was smooth and round. What MOST LIKELY caused this to happen?
Degger [83]

Answer:

C, weathering by the water.

Explanation:

While in the river, it scraps againsts other rocks and things, which causes it to change shape. For example be smoother and round.

7 0
3 years ago
Options: A.) 10 N B.) 15 N C.) 25 N D.) 35N
Lady_Fox [76]

Given:

F_gravity = 10 N

F_tension = 25 N

Let's find the net centripetal force exterted on the ball.

Apply the formula:

\sum ^{}_{}F_{\text{net}}=F_1+F_2=F_{centripetal}

From the given figure, the force acting towards the circular path will be positive, while the force which points directly away from the center is negative.

Hence, the tensional force is positive while the gravitational force is negative.

Thus, we have:

F_{\text{net}}=F_{\text{centripetal}}=F_{tension}-F_{gravity}=25N-10N=15N

Therefore, the net centripetal force exterted on the ball is 15 N.

ANSWER:

15 N

7 0
1 year ago
Write down the boiling point and freezing point of mercury an alcohol​
nekit [7.7K]
Mercury has a high boiling point of 357 degrees C.
Mercury has a freezing point of −39 degrees C.
8 0
3 years ago
What force is needed to move a 5 kg mass with an acceleration of 5 m/s²?
ElenaW [278]

Answer:

b)25N

Explanation:

F=ma

F=(5kg)(5m/s^2)

F=25N

4 0
2 years ago
Read 2 more answers
A jeweler working with a heated 47 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initi
Gelneren [198K]

Mass of gold m₁ = 47 g

Initial temperature of gold T₁ = 99 C

Specific heat of gold C₁ = 0.129 J/gC

final temperature T₂ = 38 C

Heat needed by the gold to cool down

Q =m₁ * C₁* ( T₁ - T₂)

Q = (47)(0.129)(99-38)

Q = 369.843 J

This heat will be given by the water

we need to find out mass of water m₂

and initial temperature of water is T₃ = 25 C

Specific heat of water C₂ = 4.184 J/gC

Q = m₂*C₂*(T₂ - T₃)

369.843 = m₂(4.184)(38-25)

m₂ = 6.8 g

6 0
3 years ago
Read 2 more answers
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