WHICH TYPES OF ENERGY ARE HAPPENING

Answer:

gexp = 3.65 m/s²

Explanation:

The value of acceleration due to gravity changes with the altitude. The following formula gives the value of acceleration due to gravity at some altitude from the sea level:

gexp = g(1 - 2h/Re)

where,

gexp = expected value of g at altitude = ?

g = acceleration due to gravity at sea level = 9.8 m/s²

h = altitude = 2000 km = 2 x 10⁶ m

Re = Radius of Earth = 6.37 x 10⁶ m

Therefore,

gexp = (9.8 m/s²)(1 - 2*2 x 10⁶ m/6.37 x 10⁶ m)

gexp = 3.65 m/s²

Answer:

800 calories are required to melt a 10g ice cube which is at 0 degrees C.

Explanation:

hope this helps, have an amazing day

Answer:b

Explanation:

There are four natural states of matter: Solids, liquids, gases and plasma.

Answer:

There are 4 states of matter. Solid, liquid, gas, and plasma.

Explanation:

Plasma isn't that important, the main ones are solid, liquid, and gas.

Answer:

The answer is 400

Explanation:

Answer:

PEgrav = m *• g • h

Explanation:

In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity.

Hope this helps

Answer:

12 meters

Explanation:

to find this we look at the 8 on the horizontal line this is 8 seconds, you then look upwards to see the height at that point in time

Explanation:

50 m/s may squared siya sa dun sa may s

Answer:

a

The height is   [tex]H  = 6.74 \  m [/tex]

b

The horizontal distance is  [tex]D  = 23.74 \  m [/tex]

Explanation:

From the question we are told that

  The speed is  [tex]v  =  15 \  m/s[/tex]

  The angle is  [tex]\theta  =  40^o[/tex]

   The height of the cannon from the ground is  h  =  2 m

  The distance of the net from the ground is k  =  1 m

Generally the maximum height she reaches is mathematically represented as  

     [tex]H  =  \frac{v^2 sin^2 \theta }{2 *  g }  +  h[/tex]

=>    [tex]H  =  \frac{(15)^2 [sin (40)]^2 }{2 * 9.8}  +  2[/tex]

=>    [tex]H  = 6.74 \  m [/tex]

Generally from kinematic equation  

    [tex]s = ut + \frac{1}{2} at^2[/tex]

Here s is the displacement which is mathematically represented as

         s  =  [-(h-k)]  

    =>  s =  -(2-1)

    =>  s  = -1 m

There reason why s =  -1 m is because upward motion canceled the downward motion remaining only the distance of the net from the ground which was covered during the first half but not covered during the second half

     a =  -g = -9.8

    [tex]u  =  v sin (\theta)[/tex]

So

    [tex]-1 = (vsin 40 )t + \frac{1}{2} * (-9.8) t^2[/tex]

=>  [tex]-4.9t^2 + 9.6418t + 1 = 0[/tex]

using  quadratic formula to solve the equation we have

    [tex]t  =  2.07 \  s[/tex]

Generally distance covered along the horizontal is  

   [tex]D  =  v cos (40) *  2.07[/tex]

=>   [tex]D  =  15 cos (40) *  2.07[/tex]

=>   [tex]D  = 23.74 \  m [/tex]

Answer: 120 km per hour.

Explanation: 300/2.5 = 120.

Answer:

35 m/s = v KE= 1/2 m x v^2. 89= m x 1224

89 J = KE 89 = 1/2 (m) x (35)^2. m = 0.15 kg.

Answer:

true

Explanation:

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Answer:

[tex]\boxed {\tt \frac{2}{3} \ or \ 0.666666667 \ g/cm^3}[/tex]

Explanation:

Density can be found by dividing the mass by the volume.

[tex]d=\frac{m}{v}[/tex]

The mass is 20 grams.

We have to find the volume.

[tex]m= 20 \ g\\v= 30 \ cm^3[/tex]

Substitute the values into the formula.

[tex]d=\frac{20 \ g}{30 \ cm^3}[/tex]

Divide.

[tex]d=\frac{2}{3} \ g/cm^3[/tex]

[tex]d= 0.666666667 \ g/cm^3[/tex]

The density is 2/3 grams per cubic centimeter.

Answer:

No you should not go

Explanation:

Because if you go you will be more behind and then you’ll get so stressed from the work that you didn’t do and then it will just keep on stacking up and get more and more stressed and also another reason is because you should do the responsible choice and stay home and work on your project so you would be telling your friend that you can not go Because you got work to do and maybe you could schedule it for the next weekend and have your fun next week and you should always do the responsible choice.

The resistance in a circuit is directly proportional to the length of the wire. Thus as the length increases, R increases and current I decrease. But the voltage v remains constant.

Ohm's law states that, the voltage across a circuit is the product of the current and resistance.

Thus, V = I R

The resistance R is expressed by the expression:

R = ρ l/a

where ρ  is the proportionality constant called resistivity and l and a be the length and area of the wire.

Thus, as the length increases, resistance also increases.

The increase in resistance result in a decrease the current through  the circuit. Therefore, voltage remains constant. Hence, option B is correct.

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Answer:

A)Opposite direction

Explanation:

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Answer:

The speed at which she threw the marshmallow is approximately 4.76 m/s

Explanation:

The given in formation are;

The range in which the marshmallow was thrown = 2 m (The location of her friend)

The angle at which the marshmallow was thrown = 30 degrees

The horizontal range is given by the following formula;

[tex]R = \dfrac{u^2 \times sin(2\cdot \theta)}{g}[/tex]

Where;

R = The range = 3 m

u = The initial velocity

θ = The angle at which the marshmallow was thrown = 30°

g = The acceleration due to gravity = 9.81 m/s²

By substitution, we have;

[tex]2 = \dfrac{u^2 \times sin(2\times 30)}{9.81} = \dfrac{u^2 \times sin(60)}{9.81}[/tex]

[tex]\therefore u^2 = \dfrac{ 2 \times 9.81}{sin(60)} = \dfrac{u^2 \times sin(60)}{9.81} \approx 22.66[/tex]

u ≈ √(22.66) ≈ 4.76 m/s

u ≈ 4.76 m/s

The speed at which she threw the marshmallow ≈ 4.76 m/s.

Answer:

4.76 m/s

Explanation:

Answer:

b

Explanation:

im pretty sure its b

The property of air which makes it effective in protecting firefighters is that it is a poor thermal conductor.

We define air as a mixture of gasses. We know that there a re several gases that are known to compose air and among these are oxygen, carbon dioxide, noble gasses and nitrogen.

We know that air is a poor conductor of heat. As such, air does not heat up quite easily and this would help to protect the fireman from getting burnt since air does not easily allow heat to pass through it as it were, this is why the firefighters depend on the insulative property of air.

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Answer:

energy which a body possesses by virtue of being in motion.

Answer:

kinetic energy, simply, is movement energy. it is energy which an object posses for its motion. in order to accelerate the object force must be applied. examples include:

Answer:

scatter plots show the relationship between the independent and dependent variables

Explanation:

A scatter plot is a graph which shows two variables plotted along two axes (usually the x and y axes). Scatter plots are useful in establishing any form of correlation between the dependent and independent variables in any study.

Correlation simply means the degree of relationship between variables, that is, how much does one variable affect the other? When scatter plots are almost a straight line graph, there is a high correlation between the variables. When the points in a scatter plot are isolated, there is little (sometimes zero) correlation between the variables.

Answer:

Explanation:

i didnt got what you had said about qn 1 and 2

qn 10 :pic given

qn 11;F = m * a

The apple's acceleration is not influenced by the acceleration due to gravity for this question.  In real life it most certainly is influenced by gravity.

F = m * a

F = 10 Newtons.

a = 6 m/s^2

m = 10/6 = 1.66 kg.

Answer:

The correct answer is - containers 1 and 3.

Explanation:

In any experiment or investigation, there must be all the factors should be constant other than the variable that is changed to see the effect on the result or desired character.

In this experiment to check the effect of the temperature, there must be the only temperature is a variable that should be manipulated rest should remain constant. In container 1st and 3rd, all the variable amount of sugar, the method of mixing all are the same except temperature.

Thus, the correct answer is - 1 and 3rd.

Answer:

the higher up an object is, the more potential energy it has

Explanation:

Answer: what is the person’s distance