Two examples of inventions that increase friction?

Answers

Answer 1

Answer:

My hard pp...............

Explanation:


Related Questions

If you had a accident and could no longer speak what part of your brain might of been damaged?

Answers

Answer:

Thus, damage to the right side of the brain may cause movement problems or weakness on the body's left side. For most people, the left half of the brain is responsible for verbal and logical functions including language (listening, reading, speaking, and writing), thought and memory involving words.

Explanation:

Carry on learning

What is the momentum of a 1, 500 kg car traveling at 3m/s?
67,500 kgm/s
67.5 kgm/s
4.5 kgm/s
4,500 kgm/s

Answers

Answer: D)  4,500 kg m/s

========================================

Work Shown:

To find the momentum, we multiply the mass and the velocity.

m = mass = 1500 kg

v = velocity = 3 m/s

p = momentum

p = m*v

p = (1500 kg)*(3 m/s)

p = (1500*3) kg m/s

p = 4500 kg m/s

The momentum of an object is the product of its mass and velocity. Thus momentum of the car with 1500 kg and velocity of 3 m/s is 4500  kg m/s.

What is momentum?

Momentum is a physical quantity that measure the ability to keep the force which make an object moves faster. Momentum like force is a vector quantity and is characterized with magnitude and direction.

Momentum is the product of velocity and its mass. Hence as the mass or velocity increases, momentum also increases. Increase in momentum makes the object moves faster.

Given mass of car = 1500 Kg

velocity = 3 m/s

momentum = velocity × mass

= 1500 Kg × 3 m/s

= 4500 Kg m/s.

Therefore, the momentum of the car is 4500 kg m/s.

To find more on momentum, refer here:

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tony walks at an average speed of 70 m/min from his home to his school.If the distance between his home and the school is 2100 , how much time does it take for tony to walk to school

Answers

It takes 30 minutes for Tony to get to school.

2100 divided by 70 is 30, which would represent the amount of minutes.

Also he is walking very fast to be getting 70 in a minute.

Hope this helps and have a nice day.

-R3TR0 Z3R0

Newton's Second Law says that the force applied to an object is equal to the mass of the object times its acceleration. In other words, F=ma. Use a rearranged version, a=F/m in order to calculate the acceleration of a 5 kg skateboard when you give it a push of 20 N. PLEASE HELP FAST!!

Answers

Here the force is 20 N and mass is 5 kg

acc= Force/mass

acc=20/5= 4m/s²

The can-chiller decreases the temperature of the liquid in the can by 15 °C.
The mass of liquid is 0.33 kg.
The specific heat capacity of the liquid is 4200 J / kg °C.
Calculate the energy transferred from the liquid as it cools.

Answers

Answer:

Energy transferred, Q = 20790  J

Explanation:

Given that,

The change in temperature of the liquid, [tex]\Delta T = 15^{\circ} C[/tex]

The mass of liquid, m = 0.33 kg

The specific heat capacity of the liquid is 4200 J/kg°C.

We need to find the energy transferred from the liquid as it cools. The energy transferred is given by :

[tex]Q=mc\Delta T\\\\Q=0.33\times 4200 \times 15\\\\Q=20790\ J[/tex]

So, 20790  J of energy is transferred from the liquid as it cools.

A delivery truck driver’s round trip route from the warehouse takes her 3 km East, then 1 k North, then 3 km West, and finally 1 km South. Which of the following statements cannot be true?
a. The displacement of the trip is zero
b. The distance of the round trip is 8 km
c. After driving 3 km East, the magnitude of displacement and distance are equal
d. The total displacement and distance are the same after the trip

Answers

Answer:

D I think hope this helps you

When two things are the same temperature:
А
Heat transfer between the two things stops
B
Their molecules stop moving
They have the same number of molecules
D
Their molecules move at the same average speed

Answers

Answer:

When two objects are in thermal equilibrium they are said to have the same temperature. During the process of reaching thermal equilibrium, heat, which is a form of energy, is transferred between the objects.

two students stand 4.0 meters apart and shake a jump rope, creating a standing wave with 5 antidotes. what is the wavelength of the standing wave?
1.6m
0.8m
4.0m
5.0m

Answers

Answer:

i think it is 5.0 m but im not sure sorry if im wrong

im in 7th grade

Explanation:

What type of system would allow light to enter and exit, but would keep any
additional atoms out?

Answers

An isolated system , it does not allow any matter or energy to be exchanged

Answer: it’s closed

Explanation: a pex

PLEASE HELP ASAP GIVING 33 POINTS FOLLOW ALL THE INSTRUCTIONS

Answers

Mars landscape reminds me of the deserts of California. Mars remained deserted because life and photosynthesis doesn’t exist yet in Mars. It just have steep mountains/hills, and rocks. Since Mars has no soil, the material is called regolith.

What is the mass of a tennis ball traveling with a velocity of 3 m/s and a momentum of
0.25 m/s? (1 point)
a. 0.08 kg
b. 0.5 kg
c. 9 kg
d. 18 kg

Answers

Answer:

Explanation:

P = mv  

m = P/v

m = .25/3 = .08 Kg ... A

True or False: There is the same amount of water on earth today as there was when earth was formed.

Answers

Answer:

Yes the water amounts are the same.

Explanation:

According to Mendel's law of segregation, what takes place during meiosis?A.Pairs of alleles cross over on chromosomes, exchanging one for anotherb.Pairs of alleles separate in meiosis, and each gamete receives one allele of a pairc.Part of an allele is separated, or broken off, from its chromosomed.One chromosome is suppressed, and the other chromosome of the pair determines the traits of the offspring

Answers

Answer:

b. Pairs of alleles separate in meiosis, and each gamete receives one allele of a pair.

Explanation:

Gregor Mendel, who is referred to as the FATHER OF GENETICS because of his contribution to the principles of inheritance, proposed in one of his laws called LAW OF SEGREGATION that the alleles of a gene will separate into gametes in such a way that only one of the two alleles that make up a gene will be in each gamete.

This division/separation of alleles during gamete formation is called MEIOSIS. Note that, allele is one member of a gene. Hence, according to Mendel, in meiosis, pairs of alleles separate and each gamete receives one allele of a pair.

Even though this region is gaseous, it is regarded as the Sun’s surface because at this point, light from the Sun is finally able to ________________________ .

a
get warm
b
turn into a liquid
c
escape into the solar system
d
to turn into a solid

Answers

c- escape into the solar system, because the sun is neither a solid nor a liquid, and the sun already creates its warm temperature from many reactions. the light from the sun can scatter throughout the universe, eventually getting to earth. do, have you ever heard of a wave of light being referred to as a solid or a liquid?

What kind of injuries may affect a person's stability?

plz help me

Answers

Being disabled, mental illness, sickness, losing a body part

Explanation:

a brain injury, a concussion, spinal cord injury, and a repetitive strain injury

Describe how sound signals can be transmitted from a radio station and received on a radio at your home. Create a labeled diagram that shows this process

Answers

A radio wave is generated by a transmitter and then detected by a receiver. An antenna allows a radio transmitter to send energy into space and a receiver to pick up energy from space. Transmitters and receivers are typically designed to operate over a limited range of frequencies

Answer:

The person above is right.

Explanation:

You just need to type in sound signals transmitted from a radio station and received on a radio at your home to find a diagram https://flypaper.soundfly.com/wp-content/uploads/2019/03/am.gif

TRUE or FALSE: Feeling "weightless" can be the result of accelerating downwards towards Earth.

A. TRUE

B. FALSE

Answers

I believe it would be false because in outer space, everything is weightless due to the weak gravitational force which makes things float in the air. Weightless means no weight to it and if we’re accelerating down that means the gravitational is working but in this case it would probably be false

A 5kg box rests on a table. a 3 kg box rests on top of the 5 kg box. what is the normal force from the table?

a. 19.6 n
b. 29.4 n
c. 49 n
d. 78.4 n ​

Answers

==>  The total mass resting on the table is (5 kg + 3 kg) = 8 kg.

==>  The total weight of that mass is (8 kg) x (9.8 m/s) = 78.4 newtons

==>  The boxes are stacked.  So the table doesn't know if the weight on it is coming from one box, 2 boxes, 3 boxes, or 100 boxes in a stack.  The table only knows that there is a downward force of 78.4 newtons on it.

==>  The table stands in a Physics classroom, and it soaks up everything it hears there.  It knows that every action produces an equal and opposite reaction, and that forces always occur in pairs.  

Ever since the day it was only a pile of lumber out behind the hardware store in the rain, the table has known that in order to maintain the good  reputation of tables all over the world, it must resist the weight of anything placed upon it with an identical upward force.  This is the normal thing for all good tables to do, up to the ultimate structural limit of their materials and construction, and it is known as the "normal force".

So the table in your question provides a normal force of 78.4 newtons. (d)

What is power?
1. Power is the distance an object is moved.
2. Power is the speed that an object is moved at.
3. Power is the amount of work done in a certain period of time.
4. Power is the distance an object is moved and how quickly it is moved.

Answers

Answer:

3

Explanation:

Im not that sure but I think its close... [srr]

Answer:

3. Power is the amount of work done in a certain period of time. 

Explanation:

What causes one plate to sink under another
1 Mass
2 Shape
3 Density

Answers

It is either the mass or density, I believe it is 3 density tho but it could be mass good luck:)

Find the acceleration of an object when the force is 850 N and the mass is 85 kg.
A. 0 m/s2
B. 7.3 x 104 m/s2
C. 0.1 m/s2
D.10 m/s2

Answers

Yes it really did help thanks !

The specific heat capacity of copper is 390 J/Kg AC. What does this
mean?

Answers

Answer:

It means that 400 J of heat is the required amount to raise or lower thh temperature of a 1kg piece of copper

Explanation:

390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C

From the given information,

The specific heat capacity of copper is 390 J/Kg °C. To determine what this means, we will define the term specific heat capacity.

The specific heat capacity of a substance is the amount of energy required to raise the temperature of 1 kg of the substance by 1 °C.

Therefore, 390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C.

Hence, 390 J/Kg °C specific heat capacity of copper means, 390 J of energy is required to raise the temperature of 1 kg of copper by 1 °C.

Learn more here: https://brainly.com/question/20879870

For any object in motion, distance is always _________ displacement

Answers

Answer:

for any object in motion , distance is always greater than displacement

For any object in motion, distance is always greater or equal to the displacement but it can never be less than the displacement because displacement is the shortest distance measured between the initial and the final position.

What is displacement?

An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard.

Displacement describes this shift in location.

Distance is always higher or equal to displacement for any item in motion, but it can never be less because displacement is the shortest distance between the beginning and end positions.

Learn more about displacement here,

https://brainly.com/question/10919017

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A kayaker moves 18 meters southward, then 32 meters
northward, and finally 24 meters southward.

what was the distance it moved

what is the magnitude and direction of the displacement

Answers

a kankakee ives 18 meters southward then 3 meters

the distanc move is 18-32/24^2

What moon phase will occur next in the lunar cycle?

Answers

Answer: gibbous moon

Explanation:

weehoo giggy sliggy

Answer:

waxing crescent

Explanation:

A 3.9 kg crate is accelerated from 7.0 m/s to 9.5 m/s. What is the amount of work needed to accelerate the crate to the nearest tenth of a joule?

Answers

Force equals mass times acceleration

How does nutrition affect self-concept?

Answers

Nutrition effects your physical and mental wellness, and following a healthy diet can lead to positive changes in your everyday life. A more nutrient-rich diet means more fuel for you to power through your workday, your workout, and all those everyday courses that you need to do.

What is the name of this muscle?

Answers

Answer:

shoulder

it is at the shoulder region

Explanation:

shoulder

Shoulder
It’s on the shoulder

Brainliest and a bunch of points- plz help! Also add explanation

Answers

Answer:

i believe it's the first one

Explanation:

i'm not entirely sure but i hope this helps :) have a nice day !!

a ball of mass 1kg is being suspended 10m above the ground & is then dropped. what is the balls kinetic energy just before it hits that ground ?

a. 10 J
b. 98 J
c. 50 J
d. 0 J

Answers

Answer:

E = 98 J

Explanation:

Given that,

The mass of a ball, m = 1 kg

It is being suspended 10m above the ground & is then dropped.

We need to find the ball's kinetic energy just before it hits that ground. The conservation of energy holds here. It means, the kinetic energy just before it hits that ground is equal to its potential energy i.e.

[tex]E=mgh\\\\E=1\times 10\times 9.8\\\\E=98\ J[/tex]

so, the required energy is 98 J. Hence, the correct option is (b) "98 J".

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