Can someone help me answer this pls I’ll give brainliest

Answer:

Explanation:

One

All three statements are saying exactly the same thing.

1. one direction forces = opposite direction forces. Note forces have direction. Always remember that forces have direction and you must always say what that direction is.

2. Two is saying the same thing as one. It is just that 2 is more specific about what the direction is. Clockwise is different from anti clockwise.

3. moments are forces and distances. Forces always have direction. Distances sometimes do not. At your level of study, I don't think it does. Later on, you will learn the word displacement which always has direction and that direction must be stated.

Answer D.

15 We are told to answer just 1 or 2 questions from the same student's posting. There are 4 here, so I'm going to give you just brief answers.

You should realize by now that a loaded bus has it's center of gravity raised. The answer is B

16 A is true.

Technically anything to do with turning is a torque.

D is also true.

C is better worded than B. I would pick B as the odd one out.

17

This is rotating so they must be on the same side of the pivot point. The moments add.

20*3 + 10*2 = 60 + 20 = 80  Newton Meters. Notice C has the right numbers associated with it, but the distance is divided into a Newton. Wrong answer.

In this series of questions, moments are defined as Force * Distance.

Answer:

I think it's b and I'm sorry if it's wrong

Two masses oscillating together with each of their time period as ,'T'

Option B

we know that,

The time period of a mass 'm' on a spring of spring constant 'k' can be strategize by the following equation :

[tex] \huge \rightarrow \: T \: = 2π \sqrt{ \frac{m}{k} } [/tex]

According to the question,

so,

The new time period would be

[tex] \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{2m}{2k} } [/tex]

[tex] \huge \rightarrow \: T ' \: = 2π \sqrt{ \frac{m}{k} } [/tex]

[tex] \huge \rightarrow \: T ' \: = T[/tex]

Hence ,option B is correct ✓

Here the force is 20 N and mass is 5 kg

acc= Force/mass

acc=20/5= 4m/s²

Explanation:

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

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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.

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:

https://brainly.com/question/24030570

#SPJ6

Answer:

Explanation:

Carry on learning

Answer:Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

Explanation:

Comparison of the embryological development of different species also reveals similarities that show relationships not evident in the fully-formed anatomy.

(Have a great day :D)

Answer: gibbous moon

Explanation:

weehoo giggy sliggy

Answer:

waxing crescent

Explanation:

Answer:

force=mass × acceleration

8=2 × acceleration

acceleration= 8/2= 4 m/s²

Answer:4 m/s²

Explanation:

Answer:

Loam is 40% sand, 40% silt, and 20% clay

Explanation:

Answer:

it's the star in the center of the star field

Explanation:

Why Doesn't Polaris Move? Polaris is very distant from Earth, and located in a position very near Earth's north celestial pole. ... Polaris is the star in the center of the star field; it shows essentially no movement. Earth's axis points almost directly to Polaris, so this star is observed to show the least movement

==>  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)

Answer:

480 flaps per minute

Explanation:

8*60 =480

Answer:

480 flaps per minute  

Explanation:

8*60 =480

mark me brainy plz

Answer:

A

Explanation:

A disadvantage is that sexual reproduction takes longer than asexual reproduction. A mate must be found, the egg must be fertilised by sperm, and then the offspring develop. ... This means that some individuals would survive and be able to reproduce and generate more offspring.

Answer:

i believe it's the first one

Explanation:

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

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

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

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.

Explanation:

the question is not clear

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.

i hate this question.

Conservation of momentum - is when the total momentum before and after collision is equal.

Here is the formula darling,

p = p

mv = mv

See the pic for example. HmpH

Answer:

Explanation:

Remark

This is a second class lever. It is much more efficient than the fishing pole problem. All distances are measured from the pivot in these kinds of questions.

Givens

d1 = 1.5

d2 = ?

m1 = 50 kg

m2 = 30 kg

The lighter child will have to sit further away from the pivot to make the two conditions equal.

Formula

d1*m1 = d2*m2

1.5*50 = d2 * 30

75 = 30 * d2

75/30 = d2

d2 = 2.5

Remark

Notice that the distance is longer for the lighter child. The fact that these are masses and not forces does not matter, but you should take note of it. There is a difference between masses and forces. See the fishing pole problem.

Answer to the multiple Choice question. No motion on this kind of problem means equal moments. The answer is D

Problem 2

1) The wheels are further apart making B more stable. The wider the distance the wheels are apart, the harder it would be to tip the concrete mixer over

2) The center of gravity is lower. The higher the force is the more chance you have of exerting an external force to tip the mixer over.

Answer:

3,150,000N

Explanation:

According to Newton's second law;

F = mass * acceleration

Given

Mass = 45000kg

acceleration = 70m/s^2

Substitute

F = 45000 * 70

F = 3,150,000N

Hence the force required to be produced by the rocket engines is 3,150,000N

Answer:

3,150,000 Newtons

Explanation:

F=M*A

F=45,000kg times (*) 70 m/s squared

F=3,150,000N (newtons)

Answer:

shoulder

it is at the shoulder region

Explanation:

shoulder

Answer:

d

Explanation: