If you weight 100 pounds on earth how much would you weight on the moon

Justin's average speed for the triathlon is 15.23km/h

Average speed is the total distance covered in total time taken.

(given) 28 minutes to finish the 1500 meter swim

1.75 hours for the 40 kilometer biking portion

70 minutes for the 10 kilometer run

total distance covered = 1500m + 40 km+ 10 km

                                   = 51500m = 51.500km

                                            (1km = 1000m)

total time taken = 28mint + 1.75hr + 70 mint

                           = 203mint

                time in hours = 203/60 hr

                                            (1hour = 60 mint)

average speed = total distance covered / time taken

   = 51.5 x  203/60                    

    = 15.23km/h

Justin's average speed for the triathlon is 15.23km/h

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Answer:

Explanation:

The correct option of the given question will be option © that is frequency changes.

According to the Doppler Effect, when source is moving towards the observer then the frequency increases and when the source is moving away from the observer then the frequency decreases, but the magnitude of the amplitude in both the cases will remain same. Whereas the speed of sound waves will remain constant as it was earlier. According to this effect, when there is a relative motion between the source and the observer then there will be the change in the frequency.

So, the correct answer will be that the frequency changes.

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Answer:

for part 1 the answer is 0.303

Explanation:

Answer:

I think the correct answer from the choices listed above is option A. The correct arrangement of the substances according to the most to the least ordered particle arrangement should be wood, water and neon gas. Wood should be the first since it is solid which has the most ordered structure as compared to the liquid and a gas. The neon gas is the last since as a gas it has the least ordered structure.

Answer:

A) wood, water, neon gas

Explanation:

wood, water, neon gas.

The particles of solids have an arrangement that is highly ordered and regular. Liquids have an arrangement that is less ordered, and the particle arrangement in gases is the least ordered and regular of the three states of matter.

tell me if im wrong .... hope this helps :)

Answer:

nah bro tesla

Explanation:

By power transmitted by string, the frequency must be 163.31 Hz.

We need to know about power transmitted to solve this problem. The power transmitted by a  wave on string can be determined by this equation

P = 1/2 . μ . ω² . A² . v

where P is the power, μ is mass per unit length of string, ω is angular speed, A is amplitude and v is wave propagation speed.

the wave propagation can be determined as

v = √(F.l/m)

where F is the string tension, l is length and m is the mass.

From the question above, we know that:

l = 2.7 m

m = 260 g = 0.26 kg

F = 36 N

A = 7.7 mm = 0.0077 m

P = 58 W

Find the mass per unit length

μ = m / l

μ = 0.26 / 2.7

μ = 0.096 kg / m

Find the wave propagation speed

v = √(F.l/m)

v = √(36. 2.7 /0.26)

v = √(373.85)

v = 19.34 m/s

Find the angular speed

P = 1/2 . μ . ω² . A² . v

58 = 1/2 . 0.096 . ω² . 0.0077² . 19.34

ω² = 1053777.29

ω = √1053777.29

ω = 1026.54 rad/s

Find the frequency

ω = 2πf

1026.54 = 2 . 3.14 . f

f = 163.31 Hz

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Answer:

D.) South American becomes dire than normal

Explanation:

La Niña effect can be regarded as an effect that has impacts on the global climate, this effect bring about disruption in normal weather patterns, as a result of this intense storms as well as drought is experienced. The effect could be intense by worsening of above temperature. It bring an increases the probability of having a rainfall below normal. As a result of this

South American becomes dire than normal.

Answer:

Winter Solstice

Answer:

E) 800 km/h

Explanation:

The computation of the average vector velocity module of the plane, at that time is shown below:

The displacement vector is

d^2 = d1^2 + d2^2

where,

d1 = northeast displacement

d2 = southeast displacement

Now

d^2 = (120)^2 + (160)^2

= 14400 + 2560

= 40000

= √40000

d = 200 km

Now the average velocity is

V = ΔS ÷ Δt

= 200 ÷ 1 ÷ 4

= 200 × 4

=  800 km/h

Answer:

24

Explanation:

If it took 3 hours to clean 6 houses than you can figure that is 2 houses per hours. so if there are 12 hours and 2 houses an hour, you multiply 12x2 and get 24. Another way to do it is to use proportions (aka two fractions that equal eachother):

  3 hours                12 hours

----------------    =    ---------------

 6 houses          number of houses

To calculate this, we can think about how we go from 3 to 12. Well, 3x4 is 12, so we got to 12 by doing multiplying by 4. So we can multiply 6 by 4 and you get 24.

Hope it helps! have a great day :)

Answer:

when A and B are travelling opposite directions

Circut C have most electrical power, the product of the voltage and current is highest for circuit C.

Electric Power:

It can be defined as the product of the voltage and current.

P = V x I

For circuit C

P =  4.6 x 0.6 = 2.76

Since, the product of the voltage and current is highest for circuit C.

Therefore, circut C have most electrical power.

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The first one is C!

I hope the answer helped! please mark brainliest and vote 5 stars! >:)

Answer:

jaja I don't remember it's been 6 years ago u don't remember nothing of that

Answer:

c. 3/2 mg

Explanation:

Given that the acceleration of an elevator is 1/2 g upward.

The reading on the scale of the elevator is the net external force acting on the elevator.

Let the force F acting on the elevator as shown,

By using Newton's 2nd law, [tex]F_{net}=ma[/tex]

where, [tex]F_{net}[/tex] is the net force acting on the elevator.

m is the mass of the elevator,

a is the acceleration of the elevator, as given a=1/2 g upward.

So, [tex]F_{net}=m\times \frac 1 2 g[/tex]

[tex]F-mg=m\times \frac 1 2 g \\\\F=mg+ \frac 1 2 mg \\\\F= \frac 3 2 mg.[/tex]

So, the reading on the scale in the elevator is [tex]\frac 3 2 mg[/tex].

Hence, option (c) is correct.

Answer:

Sound and light are similar in that both are forms of energy that travel in waves.

Explanation:

They both have properties of wavelength, freqency and amplitude. ... Sound can only travel through a medium (substance) while light can travel through empty space. Sound is a form of mechanical energy caused by vibrations of matter.

Answer:

When light moves from one medium (like air) to another medium (like water) it will change directions. This is a "wave-like" behavior and is called refraction. In this way light behaves like other waves such as sound waves. The speed of the light wave also changes when it moves from medium to medium.

Explanation:

Answer:

D: Heat from the water moves into the ice

Answer:

D

Explanation:

Because the molecules of a solid is going to separate form each other because of the hotness of the water and then that’s how the ice cubes would melt

Answer:

The change in momentum = -20000 kg m/s.

Explanation:

Mass m = 1000 kg

speed v₁ = 20 m/s

speed v₂ = 0 m/s

We know that,

The change in momentum

ΔP = m (Δv)

ΔP = m (v₂ - v₁)

     = 1000 (0 - 20)

     = 1000 (-20)

     = -20000 kg m/s

Thus, the change in momentum = -20000 kg m/s.

Note: negative sign indicates that the velocity is reducing when it hits the barrier.

If a bird flew from my house to the sandwich shop in a straight line, it would travel a distance of 10.44 miles.

The direction that it  should  fly from my house to get to the shop is at an angle 73.30°.

Pythagorean theorem-

The position vector are

OA = -6j AB = -10iBC=3j

where

O is the position of the house

C is the position of the shop.

Now drawing a perpendicular from C to OA at P we have,

Thus we have,

PC = 10i

PA = 3j

Thus,

OP = OA - PA = -6j + 3j = -3j

OC is the resultant of CP and OP

a) Thus the magnitude of OC

| OC | = √CP^2 + OP^2

= √ (10^2 +3^2) =10.44

b) The angle made by OC with OP

tan θ = OP/CP = 10/3

θ = 73.30°

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Because most particles fired at metal foil passed straight through, Rutherford concluded that only a small area of an atom is positively charged called the nucleus.

Rutherford's atomic model states that the atom is a small-sized particle that is composed of other fundamental objects i.e. electrons, protons, and neutrons.

In the core of an atom, there is an extremely dense, tiny-sized object called the nucleus which is positively charged.

Moreover, the nucleus is the central point containing all the mass of an atom around which negatively charged particles revolve in circular paths called electrons.

To put it simply, this model suggests that when electrons interacted with atoms in gold metal foil, only a few changed their path after colliding with the massive dense nucleus.

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Answer:

You should write the vectors in their proper sequence: i , j, k

If the vectors are perpendicular their dot product must be zero:

1) A dot B   is obviously zero since A and B have no common terms in i , j , k

2) looks like A = 2 i - 4 j + 3 k and B = i + 2 j + 2 k

A dot B = (2 * 1) + (-4 * 2) + (3 * 2) = 0

Note that the dot product produces a scalar with no direction (vector components)

Only i dot i, j dot j, and k dot k    have components   i dot j = zero, etc.

To determine the large dimension, always big dimension should be preferred. Hence, option B is correct.

An area, region, or space's length or width in one direction is referred to as a dimension in mathematics. It merely involves taking an object's length, width, and height into account.

Dimension can be expressed in any one of them, such as Length, Breadth, Width, Height, or Depth.

According to the question, the best possible way to express the dimension in 1.04 m* 4.00 m is because both the dimensions are in the same unit, so it will be easy to calculate the dimension and another thing is that all other dimensions in the option are very small, so it will take more time to measure from them because the desk is large.

Hence, measuring with 1.04 m * 4.00 m will be the more convenient and the best way as well.

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The height of the point where it hits the ball is 20.171 m.

When a batter hits a ball high in a baseball game,

Time till the ball remains in the air, t = 4.06 seconds.

The acceleration of gravity, g = 9.8 m/s².

The vertex value of time is half of the time, the ball remains in the air

i.e. [tex]\frac{4.06}{2}[/tex] = 2.03 s

Final velocity (v) at the maximum height will be 0

So, According to the First Equation of Motion:

v - u = gt

u = - gt

u = -9.8 × 2.03

u = -19.894 m/s

Now, by using the Second Equation of Motion:

v² - u² = 2gh

Since v = 0

[tex]h = \frac{u^{2} }{2g}[/tex]

h = [tex]\frac{19.894^{2} }{2 * 9.81}[/tex]

h = 20.171 m

The ball will rise 20.171 meter high.

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Answer:

Uniform rectilinear movement (m. r. u.)

Explanation:

It is a continuous movement without acceleration, that is, it moves at a constant speed. The speed does not change over time, for this reason, there is no change in acceleration.

Vf = final velocity = 50/30 [km/s] = 1.67 [km/s]

Vo = initial velocity = 50/30 [km/s] = 1.67 [km/s]

Answer:

4ac (quadruples)

Explanation:

The general formula for centripetal acceleration is given as follows:

[tex]a_{c} = \frac{v^2}{r}\\\\[/tex]   -------------- equation (1)

where,

ac = centripetal acceleration

v = tangential speed

r = radius of circular path

Now, if we double tangential speed, v' = 2v, then the acceleration will become:

[tex]a_{c}' = \frac{(2v)^2}{r}\\\\a_{c}' = \frac{4v^2}{r}[/tex]

using equation (1):

[tex]a_{c}' = 4a_{c}[/tex]

therefore, the correct answer is:

4ac (quadruples)

Answer:

2m/s

Explanation:

Given parameters:

Mass of car  = 400kg

Momentum  = 800kgm/s

Unknown:

Speed of the car  = ?

Solution:

The momentum of a car is amount of motion it posses;

      momentum  = mass  x velocity

  Insert the parameters and solve;

         800  = 400 x v

             v  = 2m/s

Answer:

6.4 kg

Explanation:

From Newton's second law of motion,

F = ma

or, 63 = m * 9.8

or, 63÷9.8 = m

or, m = 6.4

Answer:

theres a mouse lol

no

the occurrence of a natural electrical discharge of very short duration and high voltage between a cloud and the ground or within a cloud, accompanied by a bright flash and typically also thunder.

Explanation: