A person of mass 80 kg stands on Earth's surface. What is his weight?

Answers

Answer 1

Answer:
Weight is always (mass) times (gravity in the place where you are).

On Earth, acceleration due to gravity is 9.8 m/s² ,
so the person's weight is

(80 kg) x (9.8 m/s²) = 784 newtons .

(about 176.4 pounds)

Answer 2

Answer: The answer is 784 newtons. I hope that helps you :]

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A 60 kg student is standing atop a spring in an elevator that is accelerating upward at 3.0 m/s2. The spring constant is 2.5 x 103 N/m. By how much is the spring compressed?
An atom that gains or loses an electron has a net electric charge and is called a/na. proton.b. ion.c. electron.d. neutron. user: which sentence best describes mass movement?a. the steady pace of air bouncing off a mountainb. the downhill movement of animals due to heavy snow in their normal homec. the movement of particles within an atomd. the downhill flow of soil and rock resulting from gravity
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Many physical quantities are connected by inverse square laws, that is, by power functions of the form f(x)=kx^(-2). In particular, the illumination of an object by a light source is inversely proportional to the square of the distance from the source. Suppose that after dark you are in a room with just one lamp and you are trying to read a book. The light is too dim and so you move halfway to the lamp. How much brighter is the light?

A research paper isA. creative, unstructured, first-person writing.
B. casual, third-person, entertaining writing.
C. thoughtful, analytical, academic writing.
D. bullet-pointed, technical, factual writing.

Answers

A research paper is considered to be the work that is a culmination of hundreds of hours of work put into one technical writeup which serves as the groundwork for what was done in that particular research. For that reason, the asnwer to your question would be C - thoughtful, analytical and academic writing.

Suppose you decide to cut the wire into two pieces (not necessarily the same length) to shape into two circles. Write a function A ( x ) which models the total area of the two circles in terms of x , the length of one of the pieces of wire. (It may be helpful to use for a circle A = πr 2 and C = 2 πr ). Then find the length x that will minimize the total area.

Answers

Answer:

$2\pi r(r+rx)$

Explanation:

Let the area of one circular side be given by the formula : $A_(1) = \pi r^(2)$

However, the wire is a solid cylinder, then it means that the total area is 2 × $\pi r^(2)$ = $2\pi r^(2)$

However, there is the surface area to consider. This is the curved area of the wire. This is given as:

$A_(2) = lb$

The length is x.

The breadth is calculated as follows - the length of the circle = $\pi D = 2\pi r$

Then the area = lb

= $2\pi rx$

Therefore, the total area is given as $A_(1) + A_(2)$

= $2\pi r^(2) + 2\pi rx\n 2\pi r(r+rx)$

Which type of weather event is caused by a tropical low-pressure system with strong, sustained winds?

Answers

Tropical storm would be the answer.

Air pressure is exerted ______________.a. in all directions
b. in the upward direction
c. in the downward direction
d. in sideways directions

Answers

It is exerted in all directions.

Answer:

in all directions

Explanation:

Sound waves travel faster in: a. solids as compared to liquids. b. liquids as compared to gases. c. warm air as compared to cooler air. d. All of the above are correct.

Answers

Answer:

d all of the above are correct

What is true for solar, wind, and geothermal energy?

Answers

In the question "What is true for solar, wind, and geothermal energy?" The correct answer is that they are all renewable energy.
Solar energy is energy that comes from the heat from the sun.
Wind energy is the energy that is generated from the wind.
Geothermal energy energy is the energy that comes from the heat from the earth.

Solar, wind, and geothermal energy sources are all renewable. They derive their energy from natural processes that replenish themselves over time.

What is true for solar, wind, and geothermal energy?

There are a few things that are true about solar, wind, and geothermal energy.

Renewable energy sources include solar, wind, and geothermal power. They get their energy from natural processes that grow back eventually. Solar energy comes from the sun, wind energy comes from the movement of air, and geothermal energy comes from heat inside the Earth.

They are all environmentally friendly which means that it doesn't harm the environment. Solar, wind, and geothermal energy sources are better for the environment than fossil fuels. They release very little greenhouse gases when they are being used, which helps to prevent climate change and make the air cleaner.

Learn more on geothermal on brainly.com/question/1197584

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a coil has n turns enclosing an area of a. in a physics laboratory experiment, the coil is rotated during the time interval δt from a position in which the plane of each turn is perpendicular to earth's magnetic field to one in which the plane of each turn is parallel to the field. the magnitude of earth's magnetic field at the lab location is b.

Two men decide to use their cars to pull atruck stuck in mud. They attach ropes and one pulls with a force of 515 N at an angle of 31◦ with respect to the direction in which the truck is headed, while the other car pulls with a force of 926 N at an angle of 25◦ with respect to the same direction. What is the net forward force exerted on the truck in the direction it is headed?