In order to decay to half, it will be 138 days. In order to half that again down to a quarter, it will be another 138 days. 138+138 is 276, thus, 276 days.

Explanation:

P= d*g*h

P=1000*10*0.25

P=2500 Pa

Answer:

false I believe is the right answer

Answer:

True

Explanation:

Answer:

10 N

Explanation:

50 mm in m is 50 x 10^-3 m

Therefore : By using f=kx

200x 0.05 = f = 10 N

Answer:

Specific heats

Explanation:

Answer:

Direct current is the flow of current through a current carrying conductor in the same direction from positive to negative ends. Alternating current is the type of current our mains have where the current is constantly changing direction at a certain rate

Explanation:

Direct current  (DC) is a form of electricity that has a unidirectional flow, such that the current path in the current carrying conductor of a circuit is, at all times, in a specific single direction

Alternating Current (AC) is electricity continuously reverses its direction of flow and the magnitude of electricity at a given frequency with time. It is the of current found in electric supply cables that are found in our houses

Therefore, we have;

Direct current is the flow of current through a 1. current carrying conductor in the 2. same direction from positive to negative ends. Alternating current is the type of current our 3. mains have where the current is constantly 4. changing direction at a certain rate

answer: 3.2 volts

i hope this is right

Answer:

cross polination lets the best of flowers combined in one whille self polination only reproduces itself alone which is a great caracter it can live alone

Explanation:

Answer:

At point A. it gets kinda loud then at point B. it gets very loud than at point C. it gets quieter than at point D. it gets more silent.

Explanation:

Because you can tell when the waves get large it gets louder and then when the waves get more far apart then it get more quiet. Hope this helped!

Answer:

solid at room temperature

Explanation:

they are unreactive

Answer:

Explanation:

The highest surface part of a wave is called the crest, and the lowest part is the trough. The vertical distance between the crest and the trough is the wave height. The horizontal distance between two adjacent crests or troughs is known as the wavelength.

I hope it's helpful!

Answer:

55j

Explanation:

work= force × distance

We have that When A child pushes a toy truck 2.5 m across a floor with a constant force of 22 N.The work done by the child on the toy truck

W= 55 Joules

22 x 2.5= 55 J

Option D

From the question we are told that

A child pushes a toy truck 2.5 m

A constant force of 22 N.

Generally the equation for the  Workdone  is mathematically given as

W=f*d

W=22N*2.5

W= 55 Joules

Therefore

When A child pushes a toy truck 2.5 m across a floor with a constant force of 22 N.The work done by the child on the toy truck

W= 55 Joules

22 x 2.5= 55 J

Option D

For more information on this visit

https://brainly.com/question/21811998

Answer: Both cannonballs will hit the ground at the same time.

Explanation:

Suppose that a given object is on the air. The only force acting on the object (if we ignore air friction and such) will be the gravitational force.

then the acceleration equation is only on the vertical axis, and can be written as:

a(t) = -(9.8 m/s^2)

Now, to get the vertical velocity equation, we need to integrate over time.

v(t) = -(9.8 m/s^2)*t + v0

Where v0 is the initial velocity of the object in the vertical axis.

if the object is dropped (or it only has initial velocity on the horizontal axis) then v0 = 0m/s

and:

v(t) = -(9.8 m/s^2)*t

Now, if two objects are initially at the same height (both cannonballs start 1 m above the ground)

And both objects have the same vertical velocity, we can conclude that both objects will hit the ground at the same time.

You can notice that the fact that one ball is fired horizontally and the other is only dropped does not affect this, because we only analyze the vertical problem, not the horizontal one. (This is something useful to remember, we can separate the vertical and horizontal movement in these type of problems)

Answer:

velocity- the speed of something in a given direction.

Explanation:

acceleration- increase in the rate or speed of something.

Answer:

All stars in the cluster are approximately the same age.

Explanation:

An open cluster refers to a group of around a thousand stars such that these stars are surrounded by the nebula. All-stars in the cluster are approximately the same age. Milky Way consists of more than 1000 such open clusters.

Examples of an open star cluster areas follows:

1. Beehive

2. Hyades

3. Pleiades

Answer:

hahahahahahahaahahahaha

Explanation:

wala ka kwenta bobo Wala g utak 150 hahahahahahahahahahaahahahahahahahahahahahahahshahahshshshshahahahahahahahahahahahahaahahahhaahahah

Answer:

A=(80-0)/5

  = 16 m/s2

Explanation:

Explanation:

Let thermal capacity of the vessel be C' J K-1

Heat energy given by hot water = 40 x 4.2 x (60 - 30) = 5040 J

Heat energy taken by cold water = 50 x 4.2 x (30 - 20) = 2100 J

Heat energy taken by vessel = C' x (30 - 20) = 10 C' J

If there is no loss of heat energy,

Heat energy given by hot water = Heat energy taken by cold water and vessel

or 5040 = 2100 + 10 C'

or 10 C' = 2940

or C'= 294 J K-1

Thus, thermal capacity of vessel = 294 J K-1.

Answer: See explanation

Explanation:

Inertia is the force that keeps an object at rest. Inertia is referred to as the property which results in it continuing in the state of rest that it is unless there's an external force that acts upon it.

Inertia keeps objects and things in place and it holds the universe together. When there's no force that's acting in an object, such object will continue to move in a straight line and also at a constant speed.

Answer:

The max height is approximately 4.106 m

Explanation:

The given parameters are

The friction loss = 2.2 J/kg

The vapor pressure = 19.93 kN/m²

NPSHR = 4.0 m

We have;

4 × 997 × 9.8 = P + 101,325 - 2.2J/kg × 997 kg/m³ - 19930

P = 4 × 997 × 9.8  -  (101,325 - 2193.4 - 19930) = -40119.2

P = -40119.2

h = 40119.2/(997 × 9.8) ≈ 4.106

The max height ≈ 4.106 m

The raising and lifting the ball by kicking is a B) Scoop

Answer:

translucent and transparent

Answer:

0 degrees

Explanation:

this is because when the light ray hits a surface a medium at 90 degrees then the angle of incidence = 0 , thus light doesn't bend when it enters the medium, no bending means angle of refraction is 0 degrees

hope this helps ,please mark it

Explanation:

0.75

According to the formula, P=IV

150 = I×200

Answer:

See explanation

Explanation:

The conversion factor from miles per hour to kilometers per hour is 1.609344.

Hence;

To convert 75mi/h to kilometers per hour,

75mi/h * 1.609344 = 120.7 kilometers per hour

b)

To convert 75mi/h to feet per second

Since

1 mile per hour = 1.46667 foot per second

75mi/h = 75 * 1.46667 = 110 feet  per second

Answer:The Oort Cloud is about 70 000 times as far

Answer:

when their is heat, because thermal uses heat to generate energy