20 POINTS.
URGENT HELP AND PLEASE EXPLAIN.

Student A states that when she sits down on a chair, she is exerting a force on the chair and that is all that happens. Student B states that when she sits on a chair, the chair is actually exerting a force back on her in reaction to her force exerted upon the chair Which student is correct and why?

Answer:

Copper is the best conductor

Answer:

1) The acceleration is in the SW direction.

2) It is not possible to make a conclusion regarding the direction of the velocity.

Explanation:

1)

2)

Answer:

When muscles are required to work harder than they're used to or in a different way, it's believed to cause microscopic damage to the muscle fibres, resulting in muscle soreness or stiffness. DOMS is often mistakenly believed to be caused by a build up of lactic acid, but lactic acid isn't involved in this process.

Explanation:

Answer:

A................

Explanation:

Hope this helps you

A. increase it's current and increase it's voltage

Explanation:

Answer:

Body weighs lesser in water because of the upward force (buoyant force) which acts on our body thereby reducing our actual weight. This is our apparent weight.

Explanation:

hope it helps

The mass of the object is equal to 0.2 Kg when it accelerates at 5.0 m/s².

Acceleration of an object can be defined as the rate at which the object changes its velocity w.r.t. time. The acceleration can be expressed as the second derivative of position w.r.t. time and is a vector parameter.

The force exerted on an object is equal to the multiplication of the mass (m) and acceleration (a) according to Newton's 2nd law of motion.

F = ma

And,  a = F/m

The mass and acceleration have an inverse relationship.

Given, the net force acting on an object, F = 1 N

The object is accelerating at a rate, a = 5.0 m/s²

The mass of the object can be determined by using the given information as follows:

m = F/a

m = 1/ 5.0

m = 0.2 Kg

Therefore, the mass of the object is equal to 0.2 Kg.

Learn more about acceleration, here:

brainly.com/question/3046924

#SPJ6

Answer:

1.7 m

Explanation:

[tex]v_x[/tex] = Velocity of ball in x direction = 4.47 m/s

[tex]u_y[/tex] = Velocity of ball in y direction = 0

g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]

t = Time taken

[tex]s_y[/tex] = Vertical displacement = 0.7 m

[tex]s_y=u_yt+\dfrac{1}{2}gt^2\\\Rightarrow 0.7=0+\dfrac{1}{2}\times 9.81t^2\\\Rightarrow t=\sqrt{\dfrac{0.7\times 2}{9.81}}\\\Rightarrow t=0.38\ \text{s}[/tex]

Horizontal displacement is given by

[tex]s_x=v_xt\\\Rightarrow s_x=4.47\times 0.38\\\Rightarrow s_x=1.7\ \text{m}[/tex]

The passenger should throw the ball 1.7 m in front of the bucket.

Answer: The correct option is B.

Chromosomes contain genes that tell the body how to grow and work.

Explanation:

This is because chromosomes contain alot of human genes which are found in the nucleus and every humans have 23 pairs of chromosomes. The sets of genes determines some of the body features, characteristics or traits. The genes in the body form the genotype and the genotype is expressed physically which is now the phenotype i.e traits expressed physically in the body which is an indication of body appearance.

Answer: His third law states that for every action, or force, in nature there is an equal and opposite reaction.

Explanation: Basically, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A. Hope it helps!

Answer:

His third law states that for every action (force) in nature there is an equal and opposite reaction. In other words, if object A exerts a force on object B, then object B also exerts an equal and opposite force on object A.

Answer:

The nucleus has very important roles to play. As it contains genetic material, it coordinates cell activities like protein synthesis and cell division.

Explanation:

Answer: The motions shifts.

Answer:

The quantity which have both magnitude and direction is called vector quantity

A physical Quantity, which has magnitude, direction and units But must follow the traingle law of vector addition

Example:- Force, velocity acceleration displacement etc.

Answer:

the correct answer is A

Explanation:

In a series circuit the current flows through the circuit and when it is opened at some point the current stops throughout the circuit.

In a parallel circuit, the current flows through the different branches of the circuit and when the current in one branch is interrupted, it continues to flow through the others.

In this exercises they indicate that the bedroom lights are turned off (the circuit was opened), but the kitchen lights are still on, therefore it is a parallel circuit with at least two branches, the current that circulates through each one depends on the existence on each branch.

Therefore the correct answer is A

Answer:

false

Explanation:

Answer:

false

Explanation:

The Cenozoic Era is the current Era it's also called the new life era. Dinosaurs appeared in the Triassic era.

Answer:

7 42 x 10^1

Explanation:

Because 10 x 1 =10

Answer:

4

Explanation:

because she is thermal energy

Answer: A 1.5 kg sample at 10 degrees c

Explanation:

A PEX

Answer:

The speed of the raindrop is 11.55 m/s.

Explanation:

We need to find the speed of the rain in the "y" direction. We have:

[tex]v_{r}[/tex]: speed of the raindrop at 60° (vertical) =?

[tex]v_{c}[/tex]: speed of the car = 20 m/s (in the "x" direction)

Hence, the speed of the car and the speed of the raindrop are related by:

[tex]tan(\theta) = \frac{v_{c}}{v_{r}}[/tex]        

[tex] v_{r} = \frac{v_{c}}{tan(60)} = \frac{20}{tan(60)} = 11.55 m/s [/tex]

Therefore, the speed of the raindrop is 11.55 m/s.

I hope it helps you!      

According to the question,

Let,

As we know the formula,

→ [tex]tan (\Theta) = \frac{v_c}{v_r}[/tex]

or,

→ [tex]v_r = \frac{v_c}{tan (60)}[/tex]

By putting the values, we get

       [tex]= \frac{20}{tan (60)}[/tex]

       [tex]= 11.55 \ m/s[/tex]

Thus the above answer is right.

Learn more about speed here:

https://brainly.com/question/18076916

Equation of power in a electrical circuit is given as:

[tex] \bf P = I^2R[/tex]

I → Current flowing through the circuit.

R → Resistance of the circuit

We need to calculate power when;

Current (I) = 0.02 A

Resistance (R) = 30 Ω

By substituting values in the equation, we get:

[tex] \rm \longrightarrow P = (0.02)^2 \times 30 \\ \\ \rm \longrightarrow P = 0.0004 \times 30 \\ \\ \rm \longrightarrow P = 0.012 \: W[/tex]

[tex] \therefore [/tex] Power in the circuit = 0.012 W

Answer:

The element H (Hydrogen) has an atomic number of 1.

Answer:

1 = H = Hydrogen

Answer:

yeah that is correct that what I think

Answer:

60 kg m/s

Explanation:

Let [tex]a\;\; m/s^2[/tex] be the acceleration of the object.

As the acceleration of the object is constant, so

[tex]a=\frac {v-u}{t}\cdots(i)[/tex]

Given that applied force, F=6.00 N,

From Newton's second law, we have

[tex]F= m\times a[/tex],

[tex]\Rightarrow F=\frac {m(v-u)}{t}[/tex] [from equation (i)]

[tex]\Rightarrow Ft=m(v-u)[/tex]

[tex]\Rightarrow Ft=mv-mu[/tex]

[tex]\Rightarrow mv-mu=6\times 10[/tex] [given that time, t=10 s and F=6 N]

[tex]\Rightarrow mv-mu=60 kg \;m/s[/tex]

Here mv is the final momentum of the object and mu is the initial momentum of the object.

So, the change in the momentum of the object is mv-mu.

Hence, the change in the momentum of the object is 60 kg m/s.

The change in momentum of object is 60 kg-m/s.

Given data:

The magnitude of force is, F = 6.00 N.

The mass of object is, m = 3.00 kg.

The speed of object is, v = 15.0 m/s.

The time interval is, t = 10.0 s.

The change in momentum is mathematically equal to the difference between the final momentum and initial momentum of object. And it is obtained from the impulse-momentum concept as,

[tex]F=\dfrac{\Delta p}{t}\\\\\Delta p = F \times t[/tex]

Solving as,

[tex]\Delta p = 6.00 \times 10\\\\\Delta p =60.0 \;\rm kg.m/s[/tex]

Thus, we can say that the change in momentum of object is 60 kg-m/s.

Learn more about the change in momentum here:

https://brainly.com/question/904448

Answer:

ahh yes you are so smart and I hope you get a good job when you are older

Answer:

68.8 N

Explanation:

From the question given above, the following data were obtained:

Mass (m) of box = 18 Kg

Coefficient of friction (μ) = 0.39

Force of friction (F) =?

Next, we shall determine the normal force of the box. This is illustrated below:

Mass (m) of object = 18 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Normal force (N) =?

N = mg

N = 18 × 9.8

N = 176.4 N

Finally, we shall determine the force of friction experienced by the object. This is illustrated below:

Coefficient of friction (μ) = 0.39

Normal force (N) = 176.4 N

Force of friction (F) =?

F = μN

F = 0.39 × 176.4

F = 68.796 ≈ 68.8 N

Thus, the box experience a frictional force of 68.8 N.

Answer:

it would have to be 1000 netons

Answer:

c

Explanation:

Answer:

What are the following?

Explanation:

Answer:

a moderate base

Explanation:

Milk of magnesia is popularly known as magnesium hydroxide. Magnesium hydroxide Mg(OH)₂ is used as an anti-acid in toothpaste and medically as a mild laxative.

Its pH values range between 10- 11 on the pH scale.

A solution with pH value of 7 is neutral(i.e. neither acidic nor basic.

A pH value which is less than 7 is acidic while a pH value greater than 7 is basic.

For a pH value between 12 -14 on the pH scale is said to be a strong base.

Since Milk of magnesia Mg(OH)₂ pH values ranges between 10- 11 on the pH scale, it is known to be moderately basic.

(c) The potential energy at A is the same as the kinetic energy at B. So

m g h = 1/2 m v²

where m is the mass of the object at the end of the pendulum, g is the magnitude of the acceleration due to gravity, h is the height of the object at point A relative to B, and v is the object's maximum speed. So

(3.8 kg) (9.80 m/s²) h = 140 J

h = (140 J) / ((3.8 kg) (9.80 m/s²))

h ≈ 3.8 m

(f) You know the kinetic energy at B, so just solve for v :

140 J = 1/2 (3.8 kg) v²

v² = (280 J) / (3.8 kg)

v² ≈ 73.684 m²/s²

v ≈ 8.6 m/s

Answer:

5s

Explanation:

i just know

A person rides a bike with a constant velocity of 2 m/s. If his total  displacement is 10 meters,  he was riding for 5 sec.

When an item is moving, its velocity is the rate at which its direction is changing as seen from a certain point of view and as measured by a specific unit of time. Uniform motion an object is said to have uniform motion when object cover equal distance in equal interval of time within exact fixed direction. For a body in uniform motion, the magnitude of its velocity remains constant over time.

Given in question a person rides a bike with a constant velocity of 2 m/s. If his total  displacement is 10 meters,

Velocity = Displacement / time

2  = 10/time

time = 5 sec

A person rides a bike with a constant velocity of 2 m/s. If his total  displacement is 10 meters,  he was riding for 5 sec.

To learn more about velocity refer the link:

brainly.com/question/18084516  

#SPJ6