If a wooden ball has a mass of 2.4g and a volume of 6cm3. What is it’s density?

Answer:

Helped pin down the age for the universe now known to be 13.8 billion years, roughly three times the age of Earth. Discovered two moons of Pluto, Nix and Hydra. Helped determine the rate at which the universe is expanding. Discovered that nearly every major galaxy is anchored by a black hole at the centre.

Explanation:

A is pulling the block straight down toward the center of the Earth, no matter what the slope of the plane may be. A is the force of gravity.

The directions of B and C both depend on the slope of the plane.

B is a force that's parallel to the plane, pulling the block UP the plane. B is the force of friction.

C is a force perpendicular to the plane, preventing the block from falling down through the plane. C is the normal force.

Answer:

A is pulling the block straight down toward the center of the Earth, no matter what the slope of the plane may be. A is the force of gravity.

The directions of B and C both depend on the slope of the plane.

B is a force that's parallel to the plane, pulling the block UP the plane. B is the force of friction.

C is a force perpendicular to the plane, preventing the block from falling down through the plane. C is the normal force.

Explanation:

Answer:

20cm

Explanation:

2 × 5 × 2 = 20

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Explanation:

The electric field is normal to any conductor charged surface, then any negatively charged sharp end will concentrate the electrons in order to achieve that (being rejected by the others on main body), that also implies a huge voltage drop nearby the edge, meaning high electric field in the direction aimed by the sharp end, that field becomes strong enough (when charged by electrostatic machines) to propel electrons out causing air movement in that direction (a flame will bend because of that wind).

Ion wind, ionic wind, coronal wind or electric wind is the airflow induced by electrostatic forces linked to corona discharge arising at the tips of some sharp conductors (such as points or blades) subjected to high voltage relative to ground. Ion wind is an electrohydrodynamic phenomenon

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Answer:

B Gamma-Rays

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Answer:

The answer is B. Gamma Rays.

Explanation:

I take AP EX lessons and quiz all the time.

Answer:

B.

Explanation:

When a ball is thrown vertically upward, the acceleration due to gravity always acts downward to the ball. When the ball is moving up the acceleration due to gravity will decrease

hope thats right!

Hello!

Answer:

The answer is D

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Answer:

22500 Ns

Explanation:

Given,

Mass ( m ) = 1500 kg

Velocity ( v ) = 15 m/s

Formula : -

Impulse = mv

Impulse

= 1500 x 15

= 22500 Ns

Therefore,

22500 Ns is the impulse experienced by the car.

Note : -

Ns is the unit of impulse.

Answer:

A

Explanation:

Because plants cant move and animals can.

The characteristic which describes an organism of kingdom Animalia is able to move on its own when compared to the plants kingdom. Thus, the correct option is A.

Animals are the multicellular, eukaryotic organisms in the biological kingdom Animalia. Animals are the organisms which consume organic material, breathe oxygen gas, are able to move on their own, can reproduce sexually and produce organisms which contain genetic information which is recombination of both the parents, and these organisms go through an ontogenetic stage in which their body consists of a hollow sphere of the cells, the blastula, during the embryonic development of organisms.

Organisms belong to Animal kingdom show some characteristics which are not found in the organisms which belong to the plant kingdom including movement. Animals can move on their own while plants cannot.

Therefore, the correct option is A.

Learn more about Kingdom Animalia here:

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Answer:

54 [tex]\frac{m}{s}[/tex]

Explanation:

[tex]v=u+at[/tex]

where [tex]u=[/tex]initial velocity

[tex]v=0+(10\frac{m}{s^{2} } )[/tex]×[tex](5.4s)[/tex]

[tex]v=54\frac{m}{s}[/tex]

Answer:

1.17427...kg

Explanation:

Assumptions: no friction, no air resistance, no internal resistance, and it is 1 dimensional travel for velocity.

p=mv, where p is momentum, m is mass, and v is velocity

28.3=24.1(m)

divide both sides by 24.1

you get 1.174273859

Answer:

[tex]\boxed {\tt 1.17427386 \ kilograms}[/tex]

Explanation:

The formula for momentum is:

[tex]p=mv[/tex]

From this formula, we know that mass can be found by dividing the momentum by the velocity.

[tex]\frac{p}{v}=m[/tex]

The momentum is 28.3 kg m/s and the velocity is 24.1 m/s

[tex]p=28.3 \ kg \ m/s \\v=24.1 \ m/s[/tex]

[tex]\frac{28.3 \ kg \ m/s }{24.1 \ m/s} =m[/tex]

Divide. The meters per second or "m/s" will cancel each other out.

[tex]\frac{28.3 \ kg}{24.1} =m[/tex]

[tex]1.17427386 \ kg=m[/tex]

The mass of the object is 1.17427386 kilograms.

Explanation:

distance= 300m t= 25s

speed= distance/time

speed= 300/25

speed = 12ms^-1

it will go 100m In 25, bc a train is fast so it will a 100 as twice

Explanation:

So make sure you have the answer please

Answer:

his feet feel warmer because of friction. when friction takes place then an object will warm up because friction is a universal law that always takes place. if you rub your hands together, you also experience the heat of frictional I hope that helped.

Answer:

when there is no resistance.( in a vacuum)

Explanation:

this is because of acceleration due to gravity that is equal on both objects.

Answer:

The long term cost and benefit of renewable resources is that it is most likely a one-time purchase kind of thing. For example, if you use solar energy, you only have to buy the solar panels for your roof once. However, if you use gas oil to cook, you have to keep buying since it runs out. Sunlight doesn't run out.

The long term cost and benefit of non renewable resources is that it is something you can profit off of very easily. It will take a lot of time for people to completely switch over to renewable resources, so it is something that can steadily bring in money. Examples of non renewable resources that people constantly use is oil, gas, coal, etc.

Answer:

3

Explanation:

1-3 age is hard to remember

Answer:

by paying attention in class, studying and using notes on everything

Explanation:

Answer:

The acceleration of the block is 1.21 m/s².

Explanation:

Given that,

Mass = 2.0 kg

Force = 25.0 n

Angle = 30°

Coefficient of friction = 0.752

We need to calculate the acceleration of the block

Using balance equation

[tex]F-(mg\sin\theta+\mu mg\cos\theta)=ma[/tex]

Put the value into the formula

[tex]25-(2.0\times9.8\sin30+0.752\times2.0\times9.8\cos30)=2.0a[/tex]

[tex]a=\dfrac{25-(2.0\times9.8\sin30+0.752\times2.0\times9.8\cos30)}{2.0}[/tex]

[tex]a=1.21\ m/s^{2}[/tex]

Hence, The acceleration of the block is 1.21 m/s².

Explanation:

Edothermic process is the absorbtion of heat.

It is the opposite of exothermic process which is the release of energy. In edothermic process thermal energy is absorbed from the surrounding

Participating in physical activity can help to reduce stress in all of the following ways except it causes fatigue and exhaustion. Option b is correct.

Anybody movement requiring energy expenditure that is produced by skeletal muscles is defined as physical activity. Physical exercise encompasses all forms of movement,

Whether it is done for fun, to go to and from locations, or as part of one's job. Physical activity, both moderate and strenuous, is beneficial to one's health.

Physical activity is good for your heart, body, and mind. Physical exercise aids in the prevention and treatment of noncommunicable illnesses including heart disease, cancer, and diabetes.

Depression and anxiety symptoms are alleviated by physical activity. Physical activity improves one's ability to think, learn, and judge.

Participating in physical activity can help to reduce stress in all of the following ways except it causes fatigue and exhaustion.

Hence option b is correct.

To  learn more about physical activity refer to the link;

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Answer:

b

Explanation:

did on edge

Answer:

E B D A C F

Explanation:

Answer:

E B D A C F

Explanation:

Answer:

Magnetoreception (also magnetoception) is a sense which allows an organism to detect a magnetic field to perceive direction, altitude or location. This sensory modality is used by a range of animals for orientation and navigation, and as a method for animals to develop regional maps

Answer:

10 years ago

8 years

Explanation:

At its closest, Saturn is 1.2 billion kilometers away from Earth. So with today's spacecraft technology, you'll need about eight years to make the trip.

Answer:

force of gravity

Explanation:

i hope this helps and learn well

Explanation:

The sun lies at the heart of the solar system, where it is by far the largest object. It holds 99.8% of the solar system's mass and is roughly 109 times the diameter of the Earth — about one million Earths could fit inside the sun.

Answer:

99.9%

Explanation: The sun is a major and significant part of our solar system and our daily life so it is 99.9%.