PHYSICS HIGH SCHOOL

A net force of 40 N south acts on an object with a mass of 20 kg. What is the object's acceleration? (Hint: Use the formula a = 771​

Answers

Answer 1
Answer:

Answer:

2m/s2 south

Explanation:

Trust
Answer 2
Answer:

Answer:

a = 2m/S2 south

Explanation:

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What is the ultimate source of electromagnetic waves?A. Vibrating atoms
B. Vibrating molecules
C. Radio sets
D. Vibrating charged particles
E. TV antennas

Answers

The ultimate source of electromagnetic waves are the radio sets. The answer is letter C. One example of an electromagnetic radiation is the visible light. And visible light can be radio waves, infrared light and X - rays. The rays of the sun are a form of visible light. It has an electromagnetic radiation of UV (ultra violet) rays. That is why the radiation at day is greater than at day due to sun’s rays.

Mass wasting _____. creates deltas and moraines changes the land by plucking is the movement of sediment by gravity transports rock up an incline by sliding or slumping

Answers

Answer:  Is the movement of sediment by gravity.

Mass wasting is the movement of sediments generate due to the mass movement of rock, soil or other debris from a hilly or slopy region downwards due to the effect of gravity. This effect can be highly be observed during landslides. Agents like wind and water also promote this effect.

Mass wasting is the movement of sediment by gravity transports. Meaning the earth’s outer crust is being ‘wasted’ away on a ‘massive’ scale and falling to lower elevations. It is also a type of erosion and can make changes to the side of the mountain.

If 1.3 grams of air has a volume of 1000cm ^3, what is the density of air? A) 1300g/cm^3
B) 1001.3 g/cm^3
C) 769.23 g/cm^3
D) 0.0013 g/cm^3

Answers

Answer:

Density, d=0.0013\ g/cm^3

Explanation:

Given that,

Mass of the air, m = 1.3 grams

Volume of the air, V=1000\ cm^3

The density of the air is given by total mass divided by total volume. Mathematically, it is given by :

d=(m)/(V)

d=(1.3\ g)/(1000\ cm^3)

d=0.0013\ g/cm^3

Hence, this is the required solution.

D)
Density is equal to mass/volume, so in your case:
density=1.3/1000=0.0013 g/cm^3

If We Start With 400 Atoms of a Radioactive Substance, How Many Would Remain After One Half-life ?

Answers

If it's half life, that means that half of the atoms have died out. Therefore, 200 atoms have died, so there are 200 atoms left (exactly one half of 400)
200, the half life of a radioactive substance is pretty simple to remember. It is literally cutting it in half, however, don't make the same mistake I did in this subject, the second half life does not reduce it to 0, it reduces it to 100. It just keeps half-lifing over and over again. For example: 400 atoms after one half life:200, after two: 100, after 3, 50, and so on.

Car design features that is intended to increase friction when cornering or stopping?

Answers

Answer: tyre made out of rubber, tread pattern on wheels

Explanation:

the material of rubber generally grips better than other materials whilst still allows the car to move smoothly

tread patterns are essential on all tires as it increases the traction between the wheels and the road which increases the friction

What does the term equilibrium refer to?

Answers

It depends on what subject but usually it means the balance. In physics, it would be when (for example) the forces acting on an object are equal and the object is therefore in equilibrium. In Biology it would be the balance of the conditions of the body, water levels for example.

Answer:the resting position of the wave

Explanation:
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