Please i just need help

Answer:

B

Explanation:

because that's the answer

Answer:

1 /2 (W / g)  V^2 = KE1

1/2 *(W / 2) / g * (2V}^2 = KE2 = 1/2 (W / 2 ) g * 4 V^2

KE2 / KE1 = 2

The lorry traveling at twice the speed has twice the KE

4 times energy due to speed but 1/2 the mass

Lorry 2 has more kinetic energy than Lorry 1.

To compare the kinetic energy of the two lorries, we use the formula for kinetic energy:

Kinetic Energy (KE) = 1/2 * mass * [tex]velocity^2[/tex]

Let's assume the following:

Lorry 1 (L1) has a mass of M kg and a velocity of V m/s.

Lorry 2 (L2) has a mass of half of L1's mass, so its mass is (1/2)M kg, and it has a velocity of 2V m/s.

Now, let's calculate the kinetic energy for each lorry:

For Lorry 1 (L1):

KE1 = 1/2 * M * [tex]V^{2}[/tex]

For Lorry 2 (L2):

KE2 = 1/2 * (1/2)M * [tex](2V)^2 = 1/2 * (1/2)M * 4V^2 = 2 * (1/2 * M * V^2) = 2 * KE1[/tex]

From the calculations, we can see that the kinetic energy of Lorry 2 (KE2) is double the kinetic energy of Lorry 1 (KE1).

So, even though Lorry 2 is moving at twice the speed of Lorry 1, its kinetic energy is higher because it also has half the weight (mass) of Lorry 1. The increased speed of Lorry 2 contributes more to its kinetic energy than the decrease in mass.

Therefore, Lorry 2 has more kinetic energy than Lorry 1.

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Answer:

15 marshmallows to her friend.

Explanation:

Answer:

80 - 65 = 15

Explanation:

Ella starts off with 80 then gives some to her friend. She now has only 65 meaning she lost 15 marshmallows. Therefore we would do 80 - 65 = 15.

Answer:

ten minutes fakfdxjjnox

Answer:

Question:

A soccer ball is kicked horizontally off a  

22.0

meter high hill and lands a distance of  

35.0

meters from the edge of the hill. Determine the initial horizontal velocity of the soccer ball.

Projectile:

The projectile motion is a combination of uniform motion and uniform acceleration motion. When an object is thrown with a velocity (v) then, the horizontal component of the velocity (

v

h

) does not change with respect to time and therefore, the following relation holds valid for the horizontal motion:

S

p

e

e

d

=

S

p

e

e

d

T

i

m

e

The vertical component of the velocity (

v

v

) changes at the rate of  

g

=

9.81

m

/

s

2

and therefore, the equations of motion are used to study the vertical motion of the object. These equations are customized for the vertical motion as:

v

=

u

+

g

t

s

=

u

t

+

0.5

g

t

2

v

2

−

u

2

=

2

g

s

For an object thrown with a horizontal velocity, the initial vertical component of the velocity will be zero. In that case, the vertical distance traveled by the object in time (t) will be,

s

=

0.5

g

t

2

⇒

t

=

√

2

s

g

Answer and Explanation:

Given:

Height of the hill,  

H

=

22

m

The horizontal distance covered by the ball before it lands,  

d

=

35

m

Calculating the time taken by the ball to hit the ground,

t

=

√

2

H

g

=

√

2

(

22

)

9.81

=

2.12

s

Calculating the initial horizontal velocity of the ball,

V

=

d

t

=

35

2.12

=

16.51

m

/

s

which is the answer.

Explanation:

Newton's Law of Cooling is a simplification based on the assumption that the rate of energy flow is proportionate to the temperature difference.

Radiative energy flow becomes essential at very high temperature differences, and this is proportional to the difference in temperatures raised to the fourth power.

Answer:

Life Science Living things cause changes on Earth. Living things function and interact with their physical environments. Living things cause changes in the environments where they live; the changes can be very noticeable or slightly noticeable, fast or slow.

Explanation:

Please mark me as brainliest

Answer:

Atomic Mass number of helium is 4.0

Atomic mass number of carbon 12.0107

Answer:

this is from edmentum.

Explanation:

Acceleration : 17.01 m/s²

Linear motion consists of 2: constant velocity motion with constant velocity and uniformly accelerated motion with constant acceleration  

• An equation of uniformly accelerated motion  

vf = vo + at  

vf² = vo² + 2a (x-xo)  

x = distance on t  

vo / vi = initial speed  

vt / vf = speed on t / final speed  

a = acceleration  

[tex]\tt vf^2=vo^2+2ax\rightarrow vo=0\rightarrow rest\\\\35^2=0^2+2.a.36\\\\1225=72.a\\\\x=17.01~m/s^2[/tex]

Answer:

Color

Explanation:

Thus, for stars, considering them as “black bodies”, we can get an approximate figure for their temperature by measuring their dominant frequency (color). Technically scientists measure the brightness of the blue light and that of red light from the star, and from this they can calculate the temperature of the star.

Answer: color answer D

Explanation:

Answer:

inverted images

retina

Answer:

I hope the answer may help you

Explanation:

Sound is produced when an object vibrates, creating a pressure wave. This pressure wave causes particles in the surrounding medium (air, water, or solid) to have vibrational motion. As the particles vibrate, they move nearby particles, transmitting the sound further through the medium.

I hope you understand...

can you please mark my answer brainliest ♥️...

Answer:

vibarate

Explanation:

The ratio of the thermal energy dissipation by resistor 1 to that by resistor 2 will be  1 : 2

Resistors can be arranged in series or parallel

The resistors arranged in parallel will have the same potential difference across each every one of them.

Given that Resistor 1 has twice the resistance of resistor 2. They are connected in parallel to a battery. That is

[tex]R_{1}[/tex] = 2[tex]R_{2}[/tex]

Power P = lV

from Ohm's law

V = lR

Make l the subject of formula

l = V/R

Substitute l into power formula

P = [tex]V^{2}[/tex] / R

For the Resistor 1,

P =  [tex]V^{2}[/tex] / 2[tex]R_{2}[/tex]

For the Resistor 2

P =  [tex]V^{2}[/tex] / [tex]R_{2}[/tex]

The ratio of the thermal energy dissipation by 1 to that by 2 will be

[tex]V^{2}[/tex]/2[tex]R_{2}[/tex] x [tex]R_{2}[/tex]/[tex]V^{2}[/tex]

The [tex]V^{2}[/tex] and the [tex]R_{2}[/tex] will cancel out.

Therefore, the ratio of the thermal energy dissipation by 1 to that by 2 will be  1:2

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Answer:

15*4=60

Explanation:

you would multiply

A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.

When an object vibrates, a pressure wave is created, which produces sound. The particles in the surrounding medium (air, water, or solid) vibrate as a result of the pressure wave.

The vibrations of the particles move nearby particles, allowing the sound to travel further through the medium.

Hence a sound wave is produced when a medium begins to vibrate.

To learn more about the sound wave refer to the link;

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Answer:

vibrate

Explanation: slaaauyy

Answer:

A

Explanation:

Car A started at 15 Mph but took 20 seconds to get to 35 Mph. Car B only took 15 seconds to get to 35 Mph even though it started slower.

Answer:

A

Explanation:

Car A had the best initial acceleration by more than 5 mph, while Car B reached the desired speed in 15 seconds, compared to 20 seconds.

Answer:

7.08 m/s²

Explanation:

Given:

v₀ = 20.0 m/s

v = 105 m/s

t = 12.0 s

Find: a

v = at + v₀

105 m/s = a (12.0 s) + 20.0 m/s

a = 7.08 m/s²

Explanation:

where is the graph mate ??????

Answer:

hjjjjnbb tuu tui amr sathe vat karu chu ka kya hua tha ki da best

Explanation:

jjjkkk

john and caraline go out for a drive one day. this graph reprresents the distance they travlled over time during what part of time are they not moving.

Answer:

Movement of a magnet relative to a coil produces emfs as shown. The same emfs are produced if the coil is moved relative to the magnet. The greater the speed, the greater the magnitude of the emf, and the emf is zero when there is no motion.

Hope this helps!

Answer:

Adding heat makes the particles move faster so the particles have more kinetic energy when more thermal energy is added

Explanation:

Answer:

780 nm - 1000 µm.

Explanation:

i surched it up

Answer:

A. Piccolo

B. The flute would usually have the highest pitch, but because the piccolo is half the size of a flute, it's higher pitched. The piccolo in C has a range from D5 – C8 which is pretty high pitched. This means that the piccolo's range is an octave above that of the flute.

C. The human ear naturally picks out higher notes, so when piccolos play extremely high, we can hear them more easily than the other instruments in a band or orchestra.

D. I'm sorry but I don't know this one.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 250 mL

density = 1 g/mL

So we have

mass = 250 × 1

We have the final answer as

Hope this helps you

Answer:

If they have the same net force

Explanation:

Explanation: The net force is the total amount of force acting on an object. It becomes 0 when the forces are equal, canceling each other out (or balancing them - same thing).

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

where

f is the force

m is the mass

From the question we have

[tex]a = \frac{20}{5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

a

    The hiker (you ) is  200 m below his/her(your) starting point

b

   The resultant displacement in the north east direction is

[tex]a  = 6562.0 \  m [/tex]

    The resultant displacement in vertical direction (i.e the altitude change )

  [tex]b =6503.1 \  m [/tex]

Explanation:

From the question we are told that  

  The displacement in the morning is  [tex]S_{morning} =  (2200 \m , east) + (4000\ m\ north) + (100 \ m ,\ vertical)[/tex]

   The displacement in the afternoon is  [tex]S _{afternoon}= (1300\ m ,\ west) + (2500 \ m ,\ north) - (300\ m ,\ vertical)[/tex]

Generally the direction west is negative , the direction east is positive

                 the direction south is negative , the direction north is  positive

resultant displacement  is mathematically evaluated as  

    [tex](2200 \m , east) +( - 1300\ m ,\ west) = 900 \ m \ east[/tex]

     [tex](4000\ m\ north)  + (2500 \ m ,\ north) = 6500  \ m ,\ north[/tex]

     [tex](100 \ m ,\ vertical) - (300\ m ,\ vertical) = -200 \ m[/tex]

From the above calculation we see that at the end of the hiking the hiker (you) is  200 m below his/her(your) initial position

Generally from Pythagoras theorem , the resultant displacement in the north east direction is

      [tex]a  =  \sqrt{900^2 + 6500^2}[/tex]

=>     [tex]a  = 6562.0 \  m [/tex]

Generally from Pythagoras theorem , the resultant displacement in vertical direction (i.e the altitude change )

      [tex]b = \sqrt{6500^2 +(-200)^2  }[/tex]

=>   [tex]b =6503.1 \  m [/tex]

Answer:

(2) baking soda in water

Explanation:

The substance could be expected to provide the greatest relief for an acid stomach is baking soda in water. The correct option is (2).

Baking soda, also known as sodium bicarbonate is a popular ingredient for baking purpose. It helps giving foods like bread, cakes, muffins, and cookies a light and fluffy texture.

When a person has a bloated stomach, he has to take in some soda in anyways to relief.

Soda can be taken as ENO or soda flavored from soda shops.

So, one must take baking soda in water to provide the greatest relief

for an acid stomach

Thus, the correct option is (2).

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Question :-

Answer :-

Explanation :-

As per the provided information in the given question, we have been given that the Mass of the object is 150 Kg . Its Velocity is given as 24 m/s . And, we have been asked to calculate the Momentum of object .

For calculating the Momentum , we will use the Formula :-

[tex] \bigstar \: \: \boxed{ \sf{ \: Momentum \: = \: Mass \: \times \: Velocity \: }} [/tex]

Therefore , by Substituting the given values in the above Formula :-

[tex] \dag \: \: \: \sf { Momentum \: = \: Mass \: \times \: Velocity } [/tex]

[tex] \longmapsto \: \: \sf { Momentum \: = \: 150 \: \times \: 24 } [/tex]

[tex] \longmapsto \: \textbf {\textsf { Momentum \: = \: 3600 \: Kg m/s }} [/tex]

Hence :-

[tex] \underline {\rule {180pt} {4pt}} [/tex]

Answer:

The maximum height reached is approximately 44.1 meters

Explanation:

The upward (vertical) velocity of the ball = 29.4 meters per second

The equation of the vertical motion of the ball under gravity, is presented as follows;

v² = u² - 2 × g × s

Where;

v = The final velocity of the ball = 0 at maximum height

u = The initial vertical velocity with which the ball was thrown= 29.4 m/s

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

s = The height reached by the ball = [tex]s_{max}[/tex] at maximum height

∴ 0 = 29.4² - 2 × 9.8 × [tex]s_{max}[/tex]

29.4² = 2 × 9.8 × [tex]s_{max}[/tex]  = 19.6·[tex]s_{max}[/tex]

[tex]s_{max}[/tex]  = 29.4³/19.6 = 864.36/19.6 = 44.1 meters

[tex]s_{max}[/tex]  = The maximum height reached = 44.1 meters.

The maximum height reached by the ball is 43.2 meters.

Using the formula:

v² = u² + 2gH

where v is the final velocity, u is the initial velocity, g is the acceleration due to gravity and H is the height.

At maximum height, v = 0. Given that u = 29.4 m/s, g = -10 m/s (moving upward). Hence:

0² = 29.4² + 2(-10)H

20h = 29.4²

h = 43.2 meters

The maximum height reached by the ball is 43.2 meters.

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Answer:

B

Explanation:

Friction is the force used to prevent 2 objects from rubbing against each other. This would mean if you rubbed your hands together you would feel the heat from the force of friction against the 2 objects namely your hands. Some things mitigate friction like water and soap. Water commonly used in waterslides reduces friction since the properties of water reduces the friction so much that you would be able to slide smoothly. This happens since wet object don't makes hard surfaces smooth. Soap does the same thing since the two objects are more slippery and can seem to get a grip on each other for friction. I hope this helps with your question thanks you and cya!