An electromagnetic wave traveling through a vacuum has a wavelength of .15 meter. What is the period of this electromagnetic wave?

Answers

Answer 1
Answer: Tools we'll need:
Speed of EM wave in vacuum = 3 x 10⁸ meters per second.
Frequency = (speed) / (wavelength)
Period = 1/frequency

Period = (wavelength) / (speed) = (0.15) / (3 x 10⁸) = 0.5 nanosecond

( "nano..." = 10⁻⁹ )





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A student lifts a set of books off a table and places them in the upper shelf of a book case which is 2 meters above the table. If she applies a force of 5 newtons to lift these books, what is the work done?

Answers

10 joules of work done

Answer:

the awnser is D

Explanation:

Which of the following is a possible use for nuclear energy?a. power plants
b. weapons
c. powering submarines
d. all of the above

Answers

Nuclear energy can be used to power all ofthe above choices. Nuclear power plants produce radioactive waste that must bestored properly. It is very impossible for a nuclear power plant to have nowaste at all since lots of chemicals are used to create the process as it givesenergy to other machines, weapons such as bombs and  powering submarines.  Radioactive waste can not be released intolocal water supplies since the wastes are very radioactive and may causemutation to the fishes and bioaccumulation which will affect humans as well. Itwill also cause air pollution if the chemicals are not stored properly.

Answer:

D. All of the above. you're welcome

Which value from his calculation most strongly affects the number of significant figures in the answer?

Answers

The value from his calculation what most strongly affects the number of significant figures in the answer is : the one with the least significant figures
No matter what calculation that he does, this condition will always apply

Hope this helps


Think back to what you learned about stress relief in this lesson. What stress-relief strategy works best for you? Why do you think it works best for you? In addition to what you listed above, which other activities (such as various aerobic exercises, yoga, or deep breathing) are, or might be, most helpful for you? Why do you think this is the case?

Answers

Answer:

Exercise: Aerobic exercises like running, swimming, or cycling can be highly effective for stress relief. Physical activity releases endorphins, which are natural mood lifters. Additionally, exercise helps reduce muscle tension and can promote better sleep, which is crucial for managing stress.

Yoga: Yoga combines physical postures, breathing exercises, and mindfulness, making it a holistic approach to stress relief. It helps improve flexibility, reduce muscle tension, and promote relaxation through deep breathing and meditation. People who prefer a mind-body connection often find yoga highly effective.

Deep Breathing: Deep breathing exercises can be done anywhere and at any time, making them a convenient stress relief technique. Controlled breathing techniques, such as diaphragmatic breathing or the 4-7-8 technique, can help calm the nervous system and reduce stress levels.

Meditation: Meditation involves focusing the mind on a particular object, thought, or activity to train attention and awareness. It can reduce stress by promoting relaxation and mindfulness. Some people find meditation to be a powerful tool for managing stress and anxiety.

Social Support: Talking to friends, family, or a therapist can provide emotional support and a safe space to vent and share feelings. Having a strong support system can help individuals cope with stress more effectively.

Time Management: Effective time management and organizational skills can reduce the feeling of being overwhelmed. Breaking tasks into smaller, manageable steps can help individuals regain a sense of control and reduce stress.

Hobbies and Creative Activities: Engaging in hobbies or creative activities like painting, writing, or playing a musical instrument can provide an outlet for self-expression and distraction from stressors.

Nature and Relaxation: Spending time in nature, whether it's a walk in the park or a weekend camping trip, can promote relaxation and reduce stress. The calming effects of natural environments are well-documented.

Explanation:

The most effective strategy for an individual often depends on their personal preferences and the specific stressors they face. For example, someone who enjoys physical activity might find exercise to be their primary stress relief method, while someone with a preference for mindfulness might benefit more from meditation or deep breathing exercises. Experimentation and self-awareness are key to finding the best stress relief strategy for each person. Additionally, a combination of multiple strategies might be the most effective approach for some individuals, depending on the complexity of their stressors.

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The temperature of a balloon is lowered with liquid nitrogen. The balloon appears to deflate because the A. nitrogen has burst the balloon. B. nitrogen is now inside the balloon. C. balloon has lost energy and condensed. D. gas in the balloon lost energy and condensed.

Answers

The temperature of a balloon is lowered with liquid nitrogen. The balloon appears to deflate because the gas in the balloon lost energy and condensed. The answer is letter D.

List and describe the 5 health reaped components of fitness.

Answers

1.Heart and lung endurance or cardiovascular endurance is the ability to exercise the entire body for long periods of time. 2. Muscular Strength is the amount of force you can put forth with your muscles. 3. Muscular Endurance is the ability to use the muscles, which are attached to the bones, many times without getting tired. 4. Flexibility is the ability to use your joints fully. 5. Body Composition is the percentage of body weight that is fat compared to other body tissue, such as bone and muscle.

Answer:

(1) body composition, (2) flexibility, (3) muscular strength, (4) muscular endurance, and (5) cardiorespiratory endurance.