PHYSICS MIDDLE SCHOOL

If the mass of an object is 100kg and the acceleration due to gravity is 9.8m/s^2 what is the weight of the object

Answers

Answer 1
Answer:

Answer:

981 N

Explanation:

recall that weight = mass x acceleration due to gravity = mg

given that m = 100 kg and g = 9.81 m/s²

weight = mg = 100 x 9.18 = 981 N

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The amount of matter contained in a given volume for a substance is called

Answers

The amount of matter contained in a given volume for a substance is called density. The correct answer is density.

Density is a physical property of matter that describes how much mass is present in a given volume. It is typically expressed in units such as kilograms per cubic meter (kg/m³) or grams per milliliter (g/mL).

The density of a substance is determined by its mass and volume and can be used to identify and compare different materials.

Therefore, The amount of matter contained in a given volume for a substance is called density. The correct answer is density.

To know more about the density:

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Answer:

Density

Explanation:

The amount of matter in a substance is its mass. In order to calculate the amount of matter in a given volume of a sample, you will use the density equation: density = mass/volume. ... The density of the elements are known and can be looked up in charts.

List three cases in which potential energy becomes kinetic energy and three cases in which kinetic
energy becomes potential energy

Answers

1 Electrical Potential Energy, separating two charged plates will store energy as the plates want to return to their original position. 

2 Spring or Elastic can be stretched to store energy as it wants to return to rest 

3 Gravitational energy is stored by moving something (ball or pendulum are both examples of this) against a gravity gradient (lifting an object) that wants to fall back down. 

How did the scientists discover the common structure of cells

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i did some research and i found that: through use of a microscope. The first scientists to look at  human tissues through a microscope were surprised to see that all human tissues are made up of little compartments. They called these 'cells' after the bedrooms of monks in monasteries 

Which of the following is determined by local government?Select one:
A. zoning laws
B. immigration reforms
C. international treaties
D. the amount of money in circulation

Answers

Answer:

B

Explanation:
b
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Waves sometimes travel by squeezing together and then do what

Answers

Splash back into the ocean or river

If you walked at an average speed of 102 m/s, how long would it take to cross a road that is 16-m wide?

Answers


It would take (16 m) / (102 m/s) = 0.157 second.

The reason it would take such a short time is that
102 m/s is the same as roughly 228 miles per hour.
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