help please, this is unit about work, power, force in physics.

high tide will appear on noon

Answer:

The speed is 15.5 m/s

The kinetic energy can be written as:K =

(1/2)*m*v^2

where m is the mass and v is the speed.

Then we have that:

18 j = (1/2)*0.15kg*v^2

Now we solve this for v.

✓(18*2/0.15) = v

15.5 m/s = v

Explanation:

I hope it will help you.....

Answer:

sorry no idea

Explanation:

I wish I could help

Answer:

16.64 km/h

Explanation:

Think of the x and y components as the a and b sides of a triangle and simply do the Pythagorean Theorem:

[tex]a^2+b^2=c^2[/tex]

[tex]14^2+9^2=c^2[/tex]

[tex]\sqrt{196+81}=c[/tex]

[tex]\sqrt{277}=c[/tex]

[tex]16.64 km/h[/tex]

Answer:

A

Explanation:

No motion, no work.

The formula is W = F * d. If d is 0 then the work is 0.

I misread the original question. The elephant is not going anywhere soon. The girl is moving.

So the answer is A

Answer:

Option A

The man trying to move the elephant.

Explanation:

In the given picture we can see that

We know that

Here,

The girl is moving a wagon that means it displaces

So

W = F • d (distance be x)

W = Fx

Here, It shows work done

Now,

Man unable to move elephant that means it doesn't displaces, d = 0

So,

W = F • d (here d = 0)

W = F • 0

W = 0

Here, It shows no work done.

-TheUnknownScientist 72

Answer:

True: if no external forces act on a system of objects then the total momentum of the system is unchanged.

It is true that if the net external force on a system is zero, then the momentum of a system is constant even if objects in the system collide and exert forces on one another.

Momentum is simply a quantity of motion. Quantity is measurable in this case because if an object is moving and has mass, it has momentum.

If an object does not move, it does not have momentum. However, it is important in everyday life, but many people are unaware of it.

According to the law of conservation of momentum, the momentum of a closed system is constant over time (conserved).

A closed (or isolated) system is one in which the mass remains constant and the net external force is equal to zero. Only when a system is closed does its total momentum become conserved.

Thus, the statement is true.

For more details regarding momentum, visit:

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Answer:

When two materials are rubbed together, the material with the greatest affinity for electrons is the material which takes electrons away from the other material. Saran wrap takes electrons from nylon and acquires the negative charge. In turn, the nylon loses electrons and becomes charged positively.

I think it's right, HOPE IT HELPS AND BE SAFE :D

Q1) [refer attached photo]

a) know that distance is the length between two points

so

the total distance travelled by Raine = 12m + 24m +12m

= 48m

b) Average speed is total distance travelled divided by total time taken by object.

= 48m / 80s

= 0.6 ms^-1

c) know that displacement is the shortest distance between two points.

total displacement = 24m

d) since we don't know about the velocities ( i.e initial and final ) average velocity can be found with displacement ( s ) divided by time interval ( t ) of the displacement.

avg. velocity = s/t

know that displacement is the shortest distance between two points.

displacement = 24m

average velocity = 24m/ 80s

= 0.3 ms^-1

Q2)

Average speed (85 km/h) is total distance travelled divided by total time taken (1.5 hours)

total distance = speed × time

= 85 × 1.5

= 127.5 km

Q3)

24km / 0.50h = 48km/h

Answer:

PE = 13734 Joules

Step-by-step explanation:

Formula: PE = m * g * h

Givens

m = 40000 grams

m = 40000 grams * 1kg/1000 grams = 40 kg

g = 9.81

h = 35 m

PE = 40 * 9.81 * 35

PE = 13734 Joules

Answer:

Goal setting can improve performance, influence motivation, and help athletes reach their potential. It can influence athletes by motivating them to work harder

Explanation:

Answer:

An atom of Cu-63 has 34 neutrons and an atom of Cu-65 has 36 neutrons. 27- The total number of electrons in an atom of Cu-65 is 29 because copper has atomic number of 29, which simply means that an atom of copper has 29 protons and 29 electrons.

Explanation:

Answer:

Copper-65 has 36 neutrons, 29 electrons and 29 protons

Explanation:

The reaction force is the force that counterbalances the weight of the roof and acts upwards.

The question is incomplete but I will try to help you the much I can. The image of the house is not shown hence the free body diagram can not be produced.

However, let me explain to you that force is a vector hence it has direction. The total resultant force is obtained by taking the direction of all the forces into account and this is called resolution of the forces. The reaction force is the force that counterbalances the weight of the roof and acts upwards.

Learn more about reaction force: https://brainly.com/question/14360695

Answer:

the mark of the broken end is 2.6 cm so, we use the scale from the next full mark i.e. 3cm

Explanation:

we now measure the length of the pencil by keeping the 3 cm mark of the scale at it's left end.

The 3 cm value is then subtracted from the scale reading at the right side end of the pencil to obtain the correct length of the pencil. ✏️

(i i ) place the scale in the contact with object along it's length

(2) Your eyes must be exactly in front of the point where the measurements to be taken.

Hope_it_helps_mga_ka_joiners_mwehehe

1) As long as there is tension in the string connecting the two objects, they will both accelerate together with the same acceleration, 4 m/s². By Newton's second law,

• the net force on the 3-kg object acting parallel to the incline is

∑ F = F - T - f₃ - 3g sin(30°) = (3 kg) (4 m/s²)

• the net force on the 3-kg object perpendicular to the incline is

∑ F = n₃ - 3g cos(30°) = 0

• the net parallel force on the 6-kg object is

∑ F = T - f₆ - 6g sin(30°) = (6 kg) (4 m/s²)

• and the net perpendicular force on the 6-kg object is

∑ F = n₆ - 6g cos(30°) = 0

From the last two equations, it follows that

n₆ = 6g cos(30°) ≈ 50.9223 N

f₆ = 0.2 n₆ ≈ 10.1845 N

T - f₆ - 6g sin(30°) = 24 N   ⇒   T ≈ 63.5845 N ≈ 64 N

2) If the objects are pulled up the incline with constant velocity, then the acceleration of either object is zero. The free body diagrams stay the same, so we have the same equations using Newton's second law, the only difference is that each right side is zero.

The new tension in the string is then

T - f₆ - 6g sin(30°) = 0   ⇒   T ≈ 39.5845 N

From the second equation above, we find

n₃ = 3g cos(30°) ≈ 25.4611 N

f₃ = 0.1 n₃ ≈ 2.5461 N

Then in the first equation,

F - T - f₃ - 3g sin(30°) = 0   ⇒   F ≈ 56.8306 N ≈ 57 N

Answer:

yes!

Explanation:

Answer:

the answer is C on edu I got it right

The change in velocity of the baseball is 39.72 m/s

This is the difference between the final and the initial velocity of a body.

To calculate the change in velocity of the ball, we use the formula below.

Where:

Make Δv the subject of the equation

From the question,

Given:

Substitute these values into equation 2

Hence, The change in velocity of the baseball is 39.72 m/s

Learn more about change in velocity here: https://brainly.com/question/112886

Answer:

forced convection cooling

Explanation:

The turn ratio of the transformer is 40.

A transformer is an electrical device that is used to step up or step down voltage.

The formula for calculating the turns ratio of a transformer is given below.

Where:

From the question,

Given:

Substitute the values above into equation 1

Hence, The turn ratio of the transformer is 40.

Learn more about transformers here: https://brainly.com/question/6450076

Answer:

The nuclear division processes of mitosis and meiosis occur during cell division. During mitosis, body cells are divided, while during meiosis, s3x cells are divided. At mitosis, a cell divides once; at meiosis, it divides twice.

Explanation:

Answer:

1 is the power of ten.

Explanation:

[tex]10^1[/tex] is deka.

Basically 10 is deka, same result as [tex]10^1[/tex].

Answer:

I already told ya

Explanation:

i got brainly so i could learn

Answer:

Kinetic energy is DIRECTLY PROPORTIONAL TO MASS AND VELOCITY

Answer:

his results in the final angle after the collision of 37.2 degrees basically what we did there is turn the vector into a right triangle. We use sohcahtoa to solve for the angle. Being.

Explanation:

Answer:

transverse

Explanation:

Answer:

Transverse wave is the correct answer, the person above me is correct!

~Hope this helps! :)

vf² = vi² + 2.a.d

0 = 26 + 2.(-6.7).d

13.4d = 26

d = 1.94 m

Answer:

A voltmeter is an instrument used for measuring electrical potential difference between two points in an electric circuit. An ammeter is a measuring device used to measure the electric current in a circuit. A voltmeter is connected in parallel with a device to measure its voltage, while an ammeter is connected in series with a device to measure its current.

Explanation:

Hope this helps:)

Air Conditioner.

Washing Machine.

Refrigerator.

Induction Stove.

Vacuum Cleaner.

Camera

Microwave Oven.

Water Purifier