a car travels at a uniform speed of 30 km per hour for 30 mins and then at a uniform speed of 60 km per hour for the next 30 minutes calculate the average speed of a car ​

Answer:

[tex]{ \rm{1 \: {cm}^{3} = \frac{1}{100 {}^{3} } \: {m}^{3} }} \\ \\ { \rm{4 \: {cm}^{3} = \frac{4}{1000000} \: {m}^{3} }} \\ \\ { \boxed{ \rm{ = 0.000004 \: {m}^{3} }}}[/tex]

Answer:

ohohoh

Explanation:

c

it prevents the current from passing through properly causing a surplus of voltage

Answer:

Tu mujhe banaye ga face dekh aapna mirror me

Answer:

iloveyouuuuuuuuuuuuuuu

Humans need sleep to help their brains function properly. The topic sentence in the given paragraph is "Humans need sleep to help their brains function properly." This sentence introduces the main idea of the paragraph, which is the importance of sleep for brain functioning.

1. The paragraph begins by stating that humans need sleep to help their brains function properly.

2. It further explains that the brain requires a minimum number of hours to rest and organize itself.

3. The number of hours needed for sleep depends on age, with babies needing an average of 14 to 16 hours of rest daily.

4. In contrast, adults can function on about 6 to 8 hours of sleep.

5. The paragraph mentions that scientists are not completely sure about the specific activities of the brain during sleep periods.

6. However, they do know that the brain sorts and stores information and replaces chemicals when a person sleeps.

Overall, the paragraph discusses the significance of sleep for brain function and highlights that sleep plays a role in information processing and chemical restoration in the brain. The topic sentence sets the stage by emphasizing the importance of sleep for humans' brain functioning, and the subsequent sentences provide additional details and explanations related to the topic.

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Answer:

Gravity, won't stop rolling the ball because of the mass and gravitational pull and I learned this from my big sister

Explanation:

The energy transferred to the kinetic energy store of the child A's ball bearing is 0.72 J.

The energy transferred to the kinetic energy store of the child A's ball bearing is determined from the principle of conservation of energy as shown below;

K.E = Ux = ¹/₂kx²

K.E = ¹/₂ x 144 x 0.1²

K.E = 0.72 J

Thus, the energy transferred to the kinetic energy store of the child A's ball bearing is 0.72 J.

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Answer:

620 grams Mercury (1 mole Hg/200.6 grams) = 3.09 moles Hg

Explanation:

Have an awesome day ;)

Answer:

19.4Nm..............

Answer:

A

Explanation:

or else u would get a muscle pull

Answer:

a

Explanation:

Answer:

285.7 g

Explanation:

Weight = mass x gravity

mass has units of kilograms

gravity is 9.8 m/s²

newton units are kg m / s²

So:

2.8 kg m/s² = mass x 9.8 m/s²

Divide both sides by 9.8

2.8 kg m/s²

----------------  =  mass in kg  = 0.2857kg

9.8 m/s²

Convert kilograms to grams by multiplying by 1000

0.2857kg        1000 g

--------------  X  ---------------  = 285.7g

       1                  1 kg

Answer:

An object will not move unless acted upon by an unbalanced force.

Explanation:

Since Newton's first law states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

Hope this helps!!

According to Newton's law of motion an object will at a state unless and until a force act upon it. Hence, force is an external agent which change the state of an object.

Newton proposed three laws of motion explaining the motion an object. The first law states that an object will continue at the state of motion or rest unless a force acting on it.

Therefore force is an external agent which acts on a body to change it from the state of rest or motion. Force is directly proportional to the mass of the body. Hence, greater the mass, greater force must be applied to change its state.

The first of motion is called law of inertia, where inertia is the tendency of a body to stay in a state. Therefore, force changes this tendency of an object.

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Answer:(:

Explanation:

1.   19685

2. 26400

3. 47244.1

4. 15.53428

5. 2.1336

6. 3.61111

7. 42240

8. 560

9. 24.384

10. 54

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Given :

weight is equal to :

Weight of the object is 0.37 Newtons ~

Correct choice is B

Answer:

its all of the above.

Explanation:they all have potential energy but they get it in different ways.

Answer:

The potential energy increases and the kinetic energy decreases

Answer:

Explanation:

1The study of science and engineering should produce a sense of the process of argument necessary for advancing and defending a new idea or an explanation of a phenomenon and the norms for conducting such arguments. In that spirit, students should argue for the explanations they construct, defend their interpretations of the associated data, and advocate for the designs they propose. (NRC Framework, 2012, p. 73)

Argumentation is a process for reaching agreements about explanations and design solutions. In science, reasoning and argument based on evidence are essential in identifying the best explanation for a natural phenomenon. In engineering, reasoning and argument are needed to identify the best solution to a design problem. Student engagement in scientific argumentation is critical if students are to understand the culture in which scientists live, and how to apply science and engineering for the benefit of society. As such, argument is a process based on evidence and reasoning that leads to explanations acceptable by the scientific community and design solutions acceptable by the engineering community.

Argument in science goes beyond reaching agreements in explanations and design solutions. Whether investigating a phenomenon, testing a design, or constructing a model to provide a mechanism for an explanation, students are expected to use argumentation to listen to, compare, and evaluate competing ideas and methods based on their merits. Scientists and engineers engage in argumentation when investigating a phenomenon, testing a design solution, resolving questions about measurements, building data models, and using evidence to evaluate claims.

Compare and critique two arguments on the same topic and analyze whether they emphasize similar or different evidence and/or interpretations of facts.

Respectfully provide and receive critiques about one’s explanations, procedures, models and questions by citing relevant evidence and posing and responding to questions that elicit pertinent elaboration and detail.

Construct, use, and/or present an oral and written argument supported by empirical evidence and scientific reasoning to support or refute an explanation or a model for a phenomenon or a solution to a problem.

Make an oral or written argument that supports or refutes the advertised performance of a device, process, or system, based on empirical evidence concerning whether or not the technology meets relevant criteria and constraints.

Evaluate competing design solutions based on jointly developed and agreed-upon design criteria.