PLS HELP WTH THIS FOR BRAINLIEST

Answer:

its fun

Explanation:

I like fun OWo

D Solar tide

Explanation:

Because d is closer to the sun

Answer:

Explanation:

1 ) Momentum of a race car = mass of car x velocity of car . During a collision , an external  force acts on the car which changes the momentum of the car in the direction in which force acts .

2 )

The momentum of the car decreases as external force acts against the momentum . Sometimes when external force is very high , direction of momentum  is reversed .  

3 ) Impulse is force x time of action of force . Generally time of action of force in large collision  is very small . so it is calculated very carefully .

Impulse = change in momentum .

4 ) The type of collision is inelastic . In this type of collision , car crashes into safer barrier , sticks to it . It does not rebound from the barrier . In case of elastic collision , rebound creates large impulse creating huge damage to the car .

Answer:

fff

Explanation:

f

Answer:

True

Explanation:

A balanced equation demonstrates the conservation of mass by having the same number of each type of atom on both sides of the arrow

Answer:

repetitions of a certain exercise

Explanation:

Answer:

30.0 s

Explanation:

i found the answer

The first, fourth, and fifth answers are correct.

Answer:

In a permanent magnet, the magnetic field comes from the motion of the electrons inside the material, or, more precisely, from something called the electron spin. The electron spin is a bit like the Earth spinning on its axis. The magnetic field is a vector, the same way the electric field is.

Explanation:

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

Answer:

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

Explanation:

Answer:

i believe it's the first one

Explanation:

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

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".

Answer:

Explanation:

The examples of electric force are

The charge in a bulb.

Electric circuits.

Static friction between cloth when rubbed by a dryer.

The shock that is felt after touching a doorknob.

Answer:

shoulder

it is at the shoulder region

Explanation:

shoulder

Answer:

(B) Conduction

Explanation:

Answer:

a ) conduction

Explanation:

it's a because if u think about it a conductor keeps the heat from getting to a certain part of the metal

Answer:

Gravity provides a downward force, resulting in the diver going downward. They speed up like any falling object would, the pull of gravity is a dominant force. (There is a drag force – as a result of moving through the air.)

Answer:

C = 1.01

Explanation:

Given that,

Mass, m = 75 kg

The terminal velocity of the mass, [tex]v_t=60\ m/s[/tex]

Area of cross section, [tex]A=0.33\ m^2[/tex]

We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,

Weight of the object = drag force

R = W

or

[tex]\dfrac{1}{2}\rho CAv_t^2=mg[/tex]

Where

[tex]\rho[/tex] is the density of air = 1.225 kg/m³

C is drag coefficient

So,

[tex]C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01[/tex]

So, the drag coefficient is 1.01.

Answer:

G is called the constant of gravitation and is equal to 6.67 × 10−11 newton-metre2-kilogram−2.

Explanation:

Answer:10

Explanation:

2+2=10

Answer:

10

Explanation:

2+8=10

6+4=10

5+5=10

7+3=10

9+1=10

3+2+4+1=10

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:

The best thermal insulators have free electrons

Answer:

(i)

Force of gravity acting on the boy = mg

= 40 * 10

= 400 N

(ii)

Work done by him = mgh

= 40 * 10 * 0.08

= 32 J

(iii)

Power = Work / Time

= 32 / 5

= 6.4 Watt

Explanation:

hope this helps

Answer:

Correct answer is C: Because direction changes.

Explanation:

Hope you have a wonderful weekend.

Answer:

13.07m/s2 down

Explanation:

I think the equation would be

Fnet/m=a

since tension is the only force mensioned that means that

170N/13.0kg=13.07 m/s2 down

acceleration is down

Answer:

v= 449.8 m/s

Explanation:

Given data

Frequency=  346Hz

Wave length= 1.4m

The expression below is used to find the speed

[tex]v= f \lambda\\\\[/tex]

substitute

[tex]v= 346*1.3\\\\v= 449.8 m/s[/tex]

Hence the speed is v= 449.8 m/s

Explanation:

Number of :

Protons - 83

Neutrons - 126

Electrons - 83

In Bismuth.

Also it has a atomic mass of 208.98038 units.

Answer:

dont know still in 7gd

Explanation:

Answer:

Leo no i dont ansver

Explanation:

ezgisu0613062011 http ()/_

Answer:

A. wavelength

Explanation:

The others are about sound and how high it is. That has nothing to do with time.

Question : Which of the following wavelength properties would require a stopwatch to measure ?

A - wavelength

B- amplitude

C- frequency

D- height

MY ANSWER : C- FREQUENCY

MWAHHH LOVE - HAVE A RESTFUL NIGHT !