Can someone help pls

Can Someone Help Pls

Answers

Answer 1
qs 1: m = 1/2*KE*V^2

qs 2: 6,223.39 kg

Related Questions

4) Which is the BEST description of a tectonic plate? *
O A. Tectonic plates consist of the lithosphere and part of the asthenosphere.
O B.Tectonic plates are large pieces of mesosphere that never move.
C. Tectonic plates are large pieces of lithosphere that move on tope of the
asthenosphere.
O D. None of these answers is correct.

Answers

Using process of elimination the answer is D

Answer:

The answer is A

Explanation: i took k12

Two atoms each contain 6 protons, but one has 6 neutrons and the other has 8 neutrons. What are these atoms called? A. ions B. radicals C. isotopes D. binaries

Answers

Answer:

These atomos are called isotopes.

Explanation:

Each chemical element is characterized by the number of protons in its nucleus, which is called the atomic number (Z).

The number of neutrons in the nucleus can vary. There are almost always as many or more neutrons than protons. The atomic mass (A) is obtained by adding the number of protons and neutrons in a given nucleus.

The same chemical element can be made up of different atoms, that is, their atomic numbers are the same, but the number of neutrons is different. These atoms are called isotopes of the element. That is, isotopes are atoms whose atomic nuclei have the same number of protons but different numbers of neutrons.

So, these atomos are called isotopes.

Un automobil pleacă din Alexandria la ora 23 și 25 de minute și ajunge la București la ora 0 și 20 de minute. Aflați durata mișcării. Dacă automobilul s-a deplasat cu viteza de 90 km/h, aflați distanța dintre localități.

Answers

Answer:

[tex]55\ \text{minut}[/tex]

[tex]82.5\ \text{km}[/tex]

Explanation:

Timpul când mașina părăsește Alexandria este [tex]23:25[/tex]

Ora sosirii mașinii la București este [tex]00:20[/tex]

Deci, timpul necesar pentru călătorie este [tex]60-25+20=55\ \text{minut}=\dfrac{55}{60}\ \text{ore}[/tex]

Viteza mașinii este de 90 km/h

Distanța este dată de produsul vitezei și al timpului

[tex]90\times \dfrac{55}{60}=82.5\ \text{km}[/tex]

Distanța dintre localități este [tex]82.5\ \text{km}[/tex].

A 1500kg car is at rest before it accelerates when the light turns green. If it covers 45.0 meters in 15.0 seconds, what is the net force applied to the car?

Answers

Answer:

300N

Explanation:

Given parameters:

Mass of car  = 1500kg

Initial velocity  = 0m/s

Distance covered  = 45m

Time  = 15s

Unknown:

Net force applied  = ?

Solution:

From Newton's second law:

  Force  = mass x acceleration

  Force  = mass x [tex]\frac{v - u}{t}[/tex]  

v is the final velocity

u is the initial velocity

t is the time taken

    Final velocity  = [tex]\frac{45}{15}[/tex]   =3m/s

 Force  = 1500 x [tex]\frac{3 - 0}{15}[/tex]   = 300N

A resultant force of 25 newtons acts on a mass of 0.50 kilograms starting from rest. Find the acceleration in m/s2 .​

Answers

Answer:

[tex]50\:$\mathrm{m/s^2}[/tex]

Explanation:

From Newton's Second Law, recall [tex]F=ma[/tex].

Rearranging this equation, we have [tex]a=\frac{F}{m}[/tex]. [tex]F[/tex] is given as [tex]25\:\mathrm{N}[/tex] and mass given as [tex]0.5\:\mathrm{kg}[/tex].

Plugging in these values, we get:

[tex]a=\frac{25}{0.5}=\fbox{$50\:\mathrm{m/s^2}$}[/tex].

The rate change of direction or speed of the object is called acceleration. The acceleration of the given mass is 50 m/s².

Acceleration:

It is the rate change of direction or speed of the object. From the Newton's second law of motion,

[tex]\bold {a = \dfrac Fm}[/tex]

Where,

F - force applied = 25 N

m - mass = 0.5 kg

Put the values,

[tex]\bold {a = \dfrac {25}{0.5}}\\\\\bold {a = 50\ m/s^2}[/tex]

Therefore, the acceleration of the given mass is 50 m/s².

To know more about  Acceleration:

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explain how balanced and unbalanced forces effect an objects motion differently

Answers

Balanced Forces acting on an object will not change the object's motion. Unbalanced Forces acting on an object will change the change the object's motion.

Answer:

Balanced Forces will not change the object's motion.

Unbalanced Forces will change the object's motion.

Explanation:

A 50 g sample of an unknown metal is heated to 90.0C. It is placed in a perfectly insulated container along with 100 g of water at an initial temperature of 20C. After a short time, the temperature of both the metal and water become equal at 25C. The specific heat of water is 4.18 J/gC in this temperature range. What is the specific heat capacity of the metal?

Record your answer with two significant figures.
5.98
J/gC

Answers

Answer:

0.64 J/g°C

Explanation:

Using the formula;

Q = m × c × ∆T

Where;

Q = amount of heat

m = mass (g)

c = specific heat capacity

∆T = change in temperature (°C)

In this case:

Q (water) = - Q (metal)

mc∆T (water) = - mc∆T (metal)

According to the information in this question,

For water; m = 100g, c = 4.18J/g°C, ∆T = (25°C - 20°C)

For metal; m = 50g, c =?, ∆T = (25°C - 90°C)

mc∆T (water) = - mc∆T (metal)

100 × 4.18 × (25°C - 20°C) = - {50 × c × (25°C - 90°C)}

100 × 4.18 × 5 = - {50 × c × -65}

2090 = -{-3250c}

2090 = 3250c

c = 2090/3250

c = 0.643

c = 0.64J/g°C

Answer:

0.64

Explanation:

Because I got the question right :)

what kind of plate boundary is ocean ocean?

Answers

convergent boundary I think
At an ocean - ocean convergent boundary,

Pls give me BRAINLIEST pls pls pls

A bowling ball of 35.2kg, generates 218 kg.m/s units of momentum. What is the velocity of the bowling ball?

Answers

Answer:

6.19m/s

Explanation:

Given parameters:

Mass of bowling ball  = 35.2kg

Momentum  = 218kgm/s

Unknown:

Velocity of the bowling ball  = ?

Solution:

Momentum is the quantity of motion a body possess;

    Momentum  = mass x velocity

   218  = 35.2 x velocity

     Velocity  = 6.19m/s

If you drop a steel metal ball off a building and it takes 3 seconds to hit
the ground, how tall is the building?

Answers

Answer:

[tex]40\:\mathrm{m}[/tex]

Explanation:

We can use kinematics equation [tex]\Delta y={v_i}^2+\frac{1}{2}at^2[/tex] to solve this problem. Because the metal ball's initial velocity was 0, [tex]{v_i}^2=0[/tex].

Therefore, our equation becomes:

[tex]\Delta y=\frac{1}{2}at^2[/tex] (freefall equation).

[tex]t[/tex] is given as 3 seconds and [tex]a[/tex] is acceleration due to gravity ([tex]9.81\:\mathrm{m/s}[/tex]).

Therefore, our answer is:

[tex]\Delta y = \frac{1}{2}\cdot9.81\cdot3^2=44.145=\fbox{$40\:\mathrm{m}$}[/tex] (one significant figure).

If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done? compression work radiation energy creation

Answers

Answer: work

Explanation:

When Jerome swings on a rope and hence this leads to the transfer of energy from the gravitational potential energy to a kinetic energy, this implies that work is being done.

For work to be done, it simply means that one has to transfer energy from one particular form to another form. In this case, the energy was transferred from the gravitational potential energy to a kinetic energy.

Answer:

work

Explanation:

TIMED URGENT! REALLY APPRECIATE HELP!! TYSM!!!!!
What is the average Speed of the roller coaster? *

20 meters per second
20 meters per minute
20 m/hr

Answers

Answer:

1st

Explanation:

20 meters per second

Explanation:

look at the chart

A vertical spring with a force constant of 26 N/m has a relaxed length of 35 cm. A 200 g mass is then
attached to the end of the spring and is allowed to come to rest. (a) Find the length of the stretched spring.
(b) How much elastic potential energy is stored in the spring?

I just need the work please the answers is
(a) 45.2 J
(b) 0.0739

Answers

Answer:

(a) The length of the stretched string is approximately 42.53846 cm

(b) The elastic potential energy stored in the string is approximately 0.073877 Joules

Explanation:

(a) The given parameter are;

The force constant of the vertical spring, k = 26 N/m

The relaxed length of the spring, L = 35 cm = 0.35 m

The mass attached to the end of the spring, m = 200 g = 0.2 kg

By Hooke's law, we have;

F = k·x

Where;

F = The applied force on the sting = The weight of the attached mass, W

∴ F = W

The weight of the attached mass, W = m × g

Where;

g = The acceleration due to gravity ≈ 9.8 m/s²

Therefore, F = W = 0.2 kg × 9.8 m/s² = 1.96 N

From Hooke's law, we have;

x = F/k = 1.96 N/(26 N/m) ≈ 0.0753846 m

The extension of the stretched spring, x ≈ 0.0753846 m

The length of the stretched string, L[tex]_{stretched}[/tex] = L + x

∴ L[tex]_{stretched}[/tex] ≈ 0.35 m + 0.0753846 m ≈ 0.4253846 m

0.4253846 m = 42.53846 cm

The length of the stretched string ≈ 42.53846 cm

(b) The elastic potential energy stored in the string, U = 1/2·k·x²

By substituting the known values, we get;

U = 1/2 × 26 N/m × (0.0753849 m)² ≈ 0.073877 Joules

plz hurry
Which of the following is a result of sterilizing wounds with chemicals?


increased rate of infection

reduced need for hand-washing

reduced rate of infection

increased death rate

Answers

Answer:

Sterilization is a common medical practice It decreased bacterial bloom and coverage Hence it reduced rate of infection
Reduced rate of infection would be your correct answer. Sterilization decreases the rate of infection, the death rate. And nothing reduces the need for handwashing.

1. What causes electrical shock?

Current
Amperage
Voltage
Watts

Answers

Answer: A) Current

Current is the flow of electrons. The more electrons that flow, then the higher the amperage which measures this flow. If the current is high enough, then the electrical shock may cause damage of some kind.

"Amperage" is abbreviated as "Amp". You may see something like "milliamp" when it comes to measuring this amperage.

Current causes electrical shock

The driver of a 1.5 x 103 kg car is traveling east at 10 m/s and increases its speed to 30 m/s east over 15 seconds. What was the change in momentum of the car? Kgm/s

Answers

Answer:

30,000kgm/s

Explanation:

Change in momentum is expressed as;

Change in momentum = mass × change in velocity

∆M = m∆v

Mass m = 1.5×10³kg = 1500kg

∆v = 30-10 =20m/s

Substitute into the formula

Change in momentum = 1500(20)

Change in momentum = 30,000kgm/s

Help! 5 questions for 25 points? Seems fair Please help

Answers

Answer:

ezrfdjhsetnhtjhsksdjghbksfneunaifghejbcifkikjayhr

Explanation:

Sound wave W has amplitude ‘A' and frequency ‘f'. Sound wave X is louder and lower in pitch than sound wave W. What can be said about the amplitude and frequency of sound wave X?

Answers

Answer:

Sound wave X amplitude is greater than 'A' and its frequency is lesser than

'f'

Explanation:

The pitch of a sound is dictated by the frequency of the sound wave, while the loudness is dictated by the amplitude.

A high pitch sound corresponds to a high frequency and a low pitch sound corresponds to a low frequency.

The larger the amplitude of the waves, the louder the sound and vice-versa.

From the question,

Sound wave W has amplitude ‘A' and frequency 'f' and

Sound wave X is louder and lower in pitch than sound wave W.

Since sound wave X is louder, this means its amplitude is greater than 'A'.

Also, since sound wave X is lower in pitch, this means its frequency is lesser than 'f'.

Answer:

Higher than A, Lower than F

Explanation:

I NEED ANSWER ASAP!!!

At which point(s) will acceleration occur shown in the image???

Answers

Answer:

Gravity is an ever present force, and therefore acceleration is guaranteed to happen at every single one of those points (and in fact, everywhere in the universe).

On top of that, friction will be present in all four spots (friction with the rails, with the air, with the axles, etc.), and friction is a perfectly acceptable force that will cause acceleration, slowing the roller coaster down.

So the correct answer is every single point, regardless of what answer the teacher expects.

The object will be moving faster if the acceleration and velocity are pointing in the same direction. The object will also slow down if the acceleration is pointing in the opposite direction as the velocity.

What role of acceleration in the motion of object?

When an object's speed, direction of motion, or both change, it accelerates. Even while it may appear to be virtually immediate in some circumstances, such as when a golf ball is struck by a club or during car collisions, changes in an object's speed are always continuous.

Since gravity is a constant force, acceleration will unavoidably occur at each of those locations and throughout the whole universe.

Therefore, In addition, there will be friction at all four locations—friction with the axles, the air, the rails, etc.—and friction is a completely normal force that will accelerate the roller coaster, slowing it down.

Learn more about acceleration here:

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a manor house was most similar to​

Answers

Answer:

I don't know the multiple choices or if you have any but my best answer is castle.

I hope this helps!

Can anyone prove ADIABATIC PROCESS ???​

Answers

Answer:

The adiabatic process can be derived from the first law of thermodynamics relating to the change in internal energy dU to the work dW done by the system and the heat dQ added to it. The word done dW for the change in volume V by dV is given as PdV. Hence, the equation is true for an adiabatic process in an ideal gas.

Explanation:

Hope it helps......bro

Which process enables the boy to see over the wall?

Answers

Answer:    yeah it is reflection

Answer:

C

Explanation:

a cellphone weighing 80 g is flying to the air at 15 m/s what is it's kinetic energy​

Answers

Answer:

9J

Explanation:

Given parameters:

Mass of cell phone  = 80g

          1000g  = 1kg

            80g is therefore 0.08kg

Velocity of the cellphone  = 15m/s

Unknown:

Kinetic energy of the cellphone  = ?

Solution:

The kinetic energy of a body is the energy due to its motion.    

 It is expressed as:

    K.E  = [tex]\frac{1}{2}[/tex] mv²   =  [tex]\frac{1}{2}[/tex]  x 0.08 x 15²   = 9J

A tennis ball is served horizontally from 2.4m above the ground at net is 12m away and point 0.9 high will be ball clear the net where will be ball land

Answers

Explanation:

Let us first calculate  long does it take to go 12m at 30m/s( assumed speed)

12/30 = 0.4 seconds

horizontal distance the ball drop in that time

H= (0)(0.4)+1/2(-9.8)(0.4)2

H= -0.78m

negative sign shows that the height of the ball at the net from the top.

Height of the ball at the net and from the ground= H1-H=2.4-0.78=1.62m

As 1.62m>0.9m so the ball will clear the net.

H_1= V0y t’ + ½ g t’^2

-2.4= (0)t’ + ½ (-9.8) t’^2

t’= 0.69s

X’=V0x t’

X’=(30)(0.96)

X’= 20.7m

A glass test tube rubbed with silk and an acrylic rod rubbed with a paper towel become charged due to the process of charging by friction. How do the test tube and rod interact?

Answers

Answer:

Attraction.

Explanation:

Charging by friction involves rubbing of objects against one another so that one loses electron(s), while the other gains the electron(s). Thus, the objects would have opposite charges after the process.

The glass test tube rubbed with silk loses electron, thus becomes positively charged. While the acrylic rob rubbed with paper towel becomes negatively charged. Since the two rods have opposite charges, then the interaction between them would be attraction. A force of attraction between the rods would be experienced while the rods are brought to a required close range.

If an atom gains a neutron, what happens to the atom?

Answers

Answer:

If an atom gains a neutron, the atom becomes an isotope, which means that it has the same atomic number (#of protons) but a different atomic mass because it has gained the mass of 1 neutron

No answe hehshshsjsisisjsiksjssksisk

A 0.50-kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 4.0 meters per second².

Answers

Complete question:

A 0.50 kilogram frog is at rest on the bank surrounding a pond of water. As the frog leaps from the bank, the magnitude of the acceleration of the frog is 4.0 meters per second^2. Calculate The magnitude of the net force exerted on the frog as it leaps.

Answer:

2.0N

Explanation:

Given that,

Mass, m of the frog = 0.5 kg

The acceleration of the frog = 4.0 m/s².

We have been asked To find,

The magnitude of the net force exerted on the frog as it leaps.

So

We calculate this using the formula below :

F = ma

When we insert the values into the formula, we have:

F = 0.5 kg × 4 m/s²

F = 2.0 N

Therefore, the magnitude of net force is 2.0 N.

What energy is present when a magnet is moving?

Answers

Answer:

kinetic energy is when an object is moving

1. How much work is done in lifting an 8-kg box
from the floor to a height of 2m above the
floor?

Answers

Answer:

156.8 Joules

Explanation:

Work = Force x Displacement

Displacement = 2m

Force (force of gravity) = mass x acceleration due to gravity =  8Kg x 9.8m/s^2

= 78.4N

Work = FxD

Work = 78.4 N x 2m

Work = 156.8 N·m  OR 156.8 Joules

The amount of work done in lifting this box is equal to 156.8 Joules.

Given the following data:

Mass = 8 kilograms.Displacement = 2 meters.

Scientific data:

Acceleration due to gravity = 9.8 [tex]m/s^2[/tex]

To calculate the amount of work that is done in lifting this box:

How to calculate work done.

Mathematically, the work done by a person is calculated by using this formula:

[tex]Work\;done = Fd = mgd[/tex]

Where:

F is the force.d is the displacement.m is the mass.

Substituting the given parameters into the formula, we have;

[tex]Work\;done = 8 \times 9.8 \times 2[/tex]

Work done = 156.8 Joules.

Read more on work done here: https://brainly.com/question/25573309

If you wear knee pads while skating,It will take three times as long for you to come to rest when you fall and land on your knees. how does this affect the impulse applied to your knees when you fall?

Answers

The long time will decrease the velocity which will equally decrease the impulse applied to your knee.

What is impulse?

The impulse experienced by an object is the change in momentum of the object.

J = ΔP = m(v - u)

where;

J is impulseΔP is change in momentumm is mass of the bodyv is final velocityu is initial velocity

v = distance / time

when time of fall becomes 3 times long, the final velocity becomes 3 times smaller

Since the velocity will be reduced, the impulse applied to your knee will decrease as well.

Learn more about impulse here: https://brainly.com/question/25700778

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