Density is the ____ of a substance. The density of a substance is _____ if its particles are packed tightly together. Hardness shows __________.​

Answers

Answer 1

Answer:

degree

liquid

mass-volume

Explanation:


Related Questions

If a 96 n force of gravity is happening to a falling basketball what is the ball mass? The accelydue to gravity is 9.8m/s^2

Answers

Answer:

9.80 kg

Explanation:

F = ma

96 N = m(9.8 m/s^2)

m = 9.80 kg

The mass of the ball will be m= 9.8 kg

What is Newton's second law of motion?

It states that the force is equal to the rate of change of momentum . For a constant mass , force is equal to mass times acceleration

given :

Force due to gravity = 96 N

g = acceleration due to gravity = 9.8 m /s^2

using Newton's second law of motion

Since , F = ma

          96 = m g

          m = 96/9.8

          m= 9.8 kg

The mass of the ball will be m= 9.8 kg

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If an owl produces two pellets every 24 hours and each pellet contains the remains of 3 prey, how much does it eat in a week? A month?

Answers

A week= 42 prey
A month (assuming it’s 30 days)=1,260 prey

The owl eats 42 prey in a week and 180 prey in a month.

To calculate how much the owl eats in a week and a month, we need to determine the number of prey consumed in each time period.

In a week:

The owl produces two pellets every 24 hours. So, in one day, it consumes 2 * 3 = 6 prey (since each pellet contains the remains of 3 prey).

In a week (7 days), the owl consumes 6 * 7 = 42 prey.

In a month:

Assuming a month has 30 days (though some months have 31 days or 28/29 days), we can calculate the number of prey consumed in a month.

In a day: 6 prey

In a month (30 days): 6 * 30 = 180 prey.

Hence, the owl eats 42 prey in a week and 180 prey in a month.

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SOMEONE HELP ME!!!!!!!
calculate the kinetic energy of car of mass 150kg moving with velocity of 30km/h. what will be the kinetic energy when it's velocity is doubled and then tripled?​

Answers

Answer:

The correct answer is -

1. 67500 J

Explanation:

The formula for KE is  

K.  E.  =  1/ 2 *m v ^2  

So input the values we know:

K . E.  =  1/2 ⋅*150  *30 ^2

K . E.  =  150 * 900 /2

K . E . =  67500  

K . E.  = 67500

If the velocity is double then;

use 2v in the formula

K.  E.  = ( 1/ 2 )*m(2 v) ^2

= (1/2)*4m v ^2

it is four times to original Kinetic energy, and similarly if tripled then, it will be 9 times to original.

 

How many parts of oxygen do you need for
each part of acetylene for a neutral
flame?

Answers

Two parts have a good day

The input work on a pulleysystem is75 j. The pulley system is 84% efficient, then what is the output work from the pulley

Answers

Answer:

63 J

Explanation:

Efficiency = work out / work in

0.84 = W / 75 J

W = 63 J

Corey exerts a force of 35 N and moves a crate 3 m. How much work has he done on the crate?
15 J
105 J

Answers

105 J because work done is force times distance

10 minutes on the stove, the water molecules in the pot are in two different
states Identify the two different states of water molecules in the pot. Then, compare the
motion and the energy of these two types of water molecules,

Answers

Answer:

20 molcues

Explanation:

10 minutes on the stove, the water molecules in the pot are in two different states , the two different states are the liquid state and the gaseous state.

What is the matter ?

Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma .

These different states of matter have different characteristics according to which they vary their volume and shape .

As given in the problem 10 minutes on the stove , the water molecules in the pot are in two different states , the two different states are liquid state and the gaseous state ,

The gaseous state of the water molecules has higher energy and then motion as compared to the liquid state of the water molecule .

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Two magnets are attracting each other. One magnet is big and strong; the other is small and weak. The big magnet attracts the small magnet with:

Answers

Answer:

magnetism and dipole-dipole interaction

Explanation:

Two magnets are attracting each other, one magnet is big and strong, the other is small and weak, the big magnet attracts the small magnet with a stronger force, and the attraction depends on the size of the magnet.

What is the significance of the magnet and magnetic fields?

The attraction between two magnets varies, and that depends upon several factors such as the strength of the force of attraction, which determines the usefulness and functionality of magnets, for example, in industrial settings, strong magnets are often used to lift heavy loads, etc.

Hence, two magnets are attracting each other, one magnet is big and strong, the other is small and weak, the big magnet attracts the small magnet with a stronger force, and the attraction depends on the size of the magnet.

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If an element has 20 protons and 20 neutrons in the nucleus of its atoms , what is the mass number of the atom?

Answers

Answer:

A=z+n

A=20+20

A=40

Explanation:

Not sure if I'm correct but I was taught that mass number is calculated by A=z+n where A is the mass number, z is the proton number and n is the number of neutrons.

(True/False) According to Newton’s third law of motion, it is true that an object moving at a constant speed in a straight path will continue to do so until a net force acts upon it.

Answers

The statement itself is true. But to be completely and compulsively correct, that's Newton's FIRST law of motion, not the third.

what is the momentum of an object with 9.74 kg and 15 m/s?​

Answers

Answer: 146.1 kg/m/s

Explanation: Momentum is equal to mass times velocity, so you do 9.74 kg times 15 m/s and get 146.1 kg/m/s.

If a force is applied to an object, which of the following must be true?

Answers

Answer:

D. The force applied will contribute to the total net force.

good luck, i hope this helps :)

Blood enters the right side of the heart and travels to the lungs. There, the lungs eliminate carbon dioxide and exchange it for more oxygen. The oxygen-rich blood enters the left side of the heart. Then, arteries carry blood away from the heart. What process is being described?

Answers

Answer:

Blood circulation

Explanation:

The process being described is the circulation of blood.

Oxygen-rich blood leaves the heart through arteries and is transported to various cells and tissues where the exchange of oxygen for carbon dioxide takes place. Thereafter, the oxygen-deficient/carbon dioxide-rich blood moves into the veins and returns to the right side of the heart before traveling to the lung. In the lung, the carbon dioxide in the blood is exchanged for oxygen before the blood enters the left side of the heart and circulated all over again.

What happens to the the eardrum, a thin membrane at the end of the ear canal, when it is struck by a sound wave?
a) It vibrates.
b) It closes.
c) It rotates.
d) It inverts.

Answers

i think the correct answer is a.) it vibrates:]

What is the momentum of a vehicle that has a mass of 800 kg and is moving at a velocity of 5 m/s

Answers

Answer:

4000 kg.m/s

Explanation:

p=mv

m=800 kg

v=5 m/s

p=(800)(5)= 4000 kg.m/s

The process by which weak nuclear forces in carbon-14 isotopes transform a neutron into a patron an electron is called wht

Answers

Answer:

beta decay.

Explanation:

THIS IS THE COMPLETE QUESTION BELOW;

The process by which weak nuclear forces in carbon-14 isotopes transform a neutron into a proton while releasing an electron is called ______

Beta decay (β-decay) can be regarded as type of radioactive decay whereby

a beta particle whereby fast energetic electron is been emmitted away from atomic nucleus, and the original nuclide is been transformed to isobar of the particular nuclide. The process Beta decay can make unstable atoms to be more stable. The two types of beta decay are;

✓beta-minus

✓beta-plus. It should be noted that the process by which weak nuclear forces in carbon-14 isotopes transform a neutron into a proton while releasing an electron is called beta decay.

CHECK ATTACHMENT FOR EXAMPLE OF BETA DECAY EQUATION

CAN SOMEONE PLEASE TELL ME WHAT THIS WHEEL IS CALLED.WILL GIVE BRAINLIEST

Answers

Answer:

its a pie chart

Explanation:

.........................

Answer:

its a pie chart?

Explanation:

.......

The offspring resulting from sexual reproduction are exactly like their parents.

false

true

Answers

Answer:

false

Explanation:

As both parents contribute half of the new organism's genetic material, the offspring will have traits of both parents, but will not be exactly like either parent

Answer:

False

Explanation:

The only time you end up like your parent is asexual reproduction

When we touch a Van de Graaff generator, our hair may stand up if it is dry. This happens only if the strands of our hair do what?

Answers

Answer:

Repel each other.

Explanation:

Van de Graaff generator is a device that was invented in 1929, by an American physicist called Robert J. Van de Graaff.

A Van de Graaff generator refers to an electrostatic generator that typically involves the use of a moving belt to accumulate electric charge on a hollow globe that is made from metal placed on top of an insulated column and thereby, creating very high electric potentials i.e very high voltage-direct current (DC) electricity at low current levels.

Generally, when we touch a Van de Graaff generator, our hair may stand up if it is dry. This happens only if the strands of our hair repel each other because they are like charges i.e having the same potentials.

The figure above shows the position of a moon that orbits a planet in an elliptical path. Two specific locations of
the moon, position and position , are labeled.

1. As the moon orbits the planet from position to position , is the magnitude of the planet’s force due to
gravity exerted on the moon constant? Why or why not?
A
Yes, because the masses of the planet and moon remain constant.

B
Yes, because the elliptical path that the moon travels around the planet is the same for all revolutions.

C
No, because the tangential speed of the moon is always changing.

D
No, because the moon’s distance from the planet is always changing.

Answers

It is evident that the force due to gravity exerted on the moon is not constant because the  moon’s distance from the planet is always changing.

What is the gravitational force?

The gravitational force is the force of attraction that brings two masses together in the universe. We have to note that the gravitational force is an attractive force and that all of the objects that are found on the surface of the earth are under the gravitational filed of the earth.

Now we know that the distance that exists between the the moon as it is orbiting round the sun is always changing. We know that the gravitational force depends on the masses as well as the distance.

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If a wave has a wavelength of 10 m and a speed of 2.5×108 m/s (this is 250000000 m/s) what is the frequency of the wave?

Answers

Answer:

The wavelength result is 3 m. Most common velocities: Light in vacuum (air) = 300,000 km/s. Light in water = 225,000 km/s. Sound in air = 340 m/s. Sound

Explanation:

the answer is 3m

HELP!!! I MIGHT FAIL THE 6th GRADE IF I DON'T GET HELP!!!! The southern United States experiences periodic occurrences of severe cold and drought conditions. Which weather phenomenon most likely causes this and why?

Answers

Answer:

La Niña, because the jet stream is displaced northwards

Explanation:

La Nina is known to be a cool phase that affects the average ocean temperature. During this period the surface wind becomes stronger and there is lesser rainfall over the areas of the central tropical Pacific to which the Southern United States belongs.

Hence, when the southern United States experiences periodic occurrences of severe cold and drought conditions, the weather phenomenon most likely causes this and why is "La Niña, because the jet stream is displaced northwards."

During which moon phase do spring tides occur?

new moon and full moon
first quarter and third quarter
waxing gibbous and waning gibbous
waxing crescent and waning crescent
pls help it is on edge

Answers

Answer:

The Full Moon and New Moon

Explanation:

What has increased the concentration of atmospheric carbon dioxide (CO2)?

Answers

Answer:

Carbon dioxide concentrations are rising mostly because of the fossil fuels that people are burning for energy.

Can sb help me frfr

Answers

It‘ D

Higher frequency = higher energy

Ultraviolet has a way higher frequency than infrared. The frequency is higher then the one of visible light. That‘s why it can be dangerous for the skin.

what type of wave is created by sound waves

Answers

Echo sounds are created by sound waves

A glass of milk at 50 °C was kept in the open. After 10 minutes, the milk became cooler. Which statement is correct?

The temperature of the surrounding air was less than 50 °C.
The temperature of the surrounding air was greater than 50 °C.
The final temperature of the milk was less than the final temperature of the surrounding air.
The final temperature of the milk was greater than the final temperature of the surrounding air.

Answers

Answer:

The temperature of the surrounding air was less than 50c

Explanation:

Answer:

A: The temperature of the surrounding air was less than 50 °C.

Explanation:

This is correct, i took the test and got it right. <3

a rocket engine applies a force of 50000 N for a distance of 20 m. how much work is done?​

Answers

Answer:

1000000Nm

Explanation:

W=force*distance

   50000*20

Please sb help me fr

Answers

Answer:

I think it might be box 1. Hope this is right have a good day

me lo traduses plis no se ingles solo escribe lo que dice en la guia

If a car accelerates from rest at a constant 4 m/s
, how long will it take for the car to reach a
velocity of 28 m/s?​

Answers

Answer:

The time it will take for the car to reach a velocity of 28 m/s is 7 seconds

Explanation:

The parameters of the car are;

The acceleration of the car, a = 4 m/s²

The final velocity of the car, v = 28 m/s

The initial velocity of the car, u = 0 m/s (The car starts from rest)

The kinematic equation that can be used for finding (the time) how long it will take for the car to reach a velocity of 28 m/s is given as follows;

v = u + a·t

Where;

v = The final velocity of the car, v = 28 m/s

u = The initial velocity of the car = 0 m/s

a = The acceleration of the car = 4 m/s²

t = =The time it will take for the car to reach a velocity of 28 m/s

Therefore, we get;

t = (v - u)/a

t = (28 m/s - 0 m/s)/(4 m/s²) = 7 s

The time it will take for the car to reach a velocity of 28 m/s, t = 7 seconds.

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