A stone is dropped from a height of 7.70 m how fast is it going when it is 5.25 m above the ground
Answers
The velocity of the stone when it is 5.25 m above the ground is determined as 6.93 m/s.
Velocity of the stone
The velocity of the stone at the given displacement is calculated as follows;
K.E = ΔP.E
¹/₂mv² = mgh
v = √2gΔh
v = √[2(9.8)(7.7 - 5.25)]
v = 6.93 m/s
Thus, the velocity of the stone when it is 5.25 m above the ground is determined as 6.93 m/s.
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TIMED URGENT! REALLY APPRECIATE HELP!! TYSM!!!!!What is the average Speed of the roller coaster? *20 meters per second20 meters per minute20 m/hr
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Answer:
It can hurt you if you get a carpet burn if you rub against carpet really fast and hard. It can help by keeping your shoes from slipping around all the time when you walk/run. Same with bike tires.
Explanation:
b) Both heat capacity and specific heat account for mass.
c) Neither specific heat nor heat capacity accounts for mass.
d) Only specific heat accounts for mass.
2. Which of the following factors is not used in calculating the specific heat of a substance?
a) mass
b) temperature change
c) heat required for a temperature change
d) melting point
3. The amount of heat needed to raise 250 g of a substance by 15 K is 2,930 J. What is the specific heat of the substance ?
a) 0.78
b) 11,000
c) 780
d) 1.1 × 10^7
4. If 50 g of liquid water [C = 4,180 J/(kgK)] changes temperature in a calorimeter from 298 K to 348 K, then how much heat is transferred?
a) 10.5 J
b) 10.5 kJ
c) 72.7 J
d) 100 kJ
Answers
Answers
103 s (time)
Unknown: P=?
Formula: P=W/t
Solution: P= 105 J/103 s = n
Answer: P= 1.02 J/s or watts is the average power
A. Force
B. Joules
C. Power
D. Energy
Answers
Answers
Answer:
- Increases levels of well-being neurotransmitters
- Improves fitness
- Improves mental health
- Reduces the risk of developing diseases
Explanation:
Performing physical activities helps to build a healthy relationship with yourself, in the sense that physical activity promotes health at all levels. Health is a set of physical, mental and social well-being, so physical activity reaches all these levels and increases the quality of life for a person as a whole.
There are several types of physical activities that can be performed and you can choose the one that best fits your preferences and routine. A walk for example can be done in any safe place and at any time and it already helps in improving physical conditioning, in receiving serotonin and endorphins, in reducing blood pressure and protecting the heart and in improving mental health.
So the ideal is for each person to set their own goals in relation to their health and seek to achieve them, either to have a better quality of life, to socialize more with people, to prevent diseases, etc.
Physical exercise helps build relationship by:
- Reducing one's stress and good level of mental health.
- One can be able handle anxiety and less mental health problem.
What are Exercise?
This is known to be any physical activities such as walking, running, etc., that is often done so as to keep the body fit.
It is very important when as it helps one to maintain a good balance of mental health. As a person moves their body, there is the release of endorphins that functions to make us feel good and helps handle the effects of stress and anxiety. The more a person exercise, the less mental health cases and more happier relationships.
Note that Values are the drive force of your actions and they push or motivate as you set your life goals. They help to eliminate any obstacle in term of foreign ideas that are against one's value and it keeps one's focus on the goal.
Learn more about Exercise from
2. They both need to gain one electron.
3. Sodium needs to lose one electron, and chlorine needs to gain one electron.
4. Sodium needs to gain one electron, and chlorine needs to lose one electron.
Answers
Answer: The correct option is (3) " Sodium needs to lose one electron, and chlorine needs to gain one electron ".
Explanation :
The electronic configuration of sodium (Na) is . It has only one vacant electron.
While the electronic configuration of chlorine is . It has seven valance electrons.
When Na reacts with Cl, Na will lose one electron and this lost electron gets transferred to chlorine. This forms a strong ionic bond.
So, the correct option is (3) " Sodium needs to lose one electron, and chlorine needs to gain one electron ".