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3 years ago

Help me with this please anyone

Physics

1 answer:

ruslelena [56]3 years ago

7 0

Answer:

The 1st reaction is synthesis and the 2nd reaction is a double displacement.

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Define kinetic energy and thermal energy. Describe what happens to each as the temperature of a substances increases.

Margaret [11]

Answer:

Kinetic energy is the amount of energy a object has while it's in motion, and thermal energy is heat energy. In this case when the heat rises in substances for example a solid it will transform into a liquid causing the molecules to move faster which is a increase of kinetic energy.

Explanation:

4 0

3 years ago

Read 2 more answers

You take the mass of the object 400 grams then what do you predict the force needed to move the object at a constant acceleratio

Oksanka [162]

Answer:

Below

Explanation:

To find the force needed to move an object, you can use this formula :

force = (mass)(acceleration)

Plugging our values in...

force = (400g)(3 m/s^2)

= 1,200 Newtons

We can see how this works for the previous answers :

force = (100g)(3 m/s^2)

= 300 Newtons and so on....

Hope this helps! Best of luck <3

6 0

3 years ago

List three things that can affect an objects resistance.

DENIUS [597]

Answer:

The amount of air resistance an object experiences depends on its speed, its cross-sectional area, its shape and the density of the air.

Explanation:

5 0

3 years ago

The radioactive element radium (Ra) decays by a process known asalpha decay,in which the nucleus emits a helium nucleus. (Factoi

tamaranim1 [39]

Answer: The energy released in the decay process is $4.6800\times 10^{11}J$

Explanation:

The equation for the alpha decay of Ra-226 follows:

$_{88}^{226}\textrm{Ra}\rightarrow _{2}^{4}\textrm{He}+_{86}^{222}\textrm{Rn}$

To calculate the mass defect, we use the equation:

Mass defect = Sum of mass of product - Sum of mass of reactant

$\Delta m=(m_{Rn}+m_{He})-(m_{Ra})$

We know that:

$m_{Rn}=222.0176u\\m_{Ra}=226.0254u\\m_{He}=4.0026u$

Putting values in above equation, we get:

$\Delta m=(222.0176+4.0026)-(226.0254)=-0.0052g=-5.2\times 10^{-6}kg$

(Conversion factor: 1 kg = 1000 g )

To calculate the energy released, we use Einstein equation, which is:

$E=\Delta mc^2$

$E=(-5.2\times 10^{-6}kg)\times (3\times 10^8m/s)^2$

$E=-4.6800\times 10^{11}J$

Hence, the energy released in the decay process is $4.6800\times 10^{11}J$

8 0

3 years ago

A super ball is dropped from a height of 100 feet. Each time it bounces, it rebounds half the distance it falls. How many feet w

Crank

The total distance travelled by the ball after the fourth impact is 275 feet.

Explanation:

Given-

Height, h = 100 feet

Rebounds half the distance

Distance in feet for the fourth time, x = ?

For the first time, the distance travelled by the ball is, x = 100 feet

For the second time, it will bounce up to 50 feet and fall upto 50 feet( half of 100 feet)

So, the distance travelled after the second impact, x = 100 + 50 + 50 = 200 feet

For the third time, it will bounce up to 25 feet and fall upto 25 feet( half of 50 feet)

So, the distance travelled after the third impact, x = 200 + 25 + 25 = 250 feet

For the fourth time, it will bounce up to 12.5 feet and fall upto 12.5 feet( half of 25 feet)

So, the distance travelled after the fourth impact, x = 250 + 12.5 + 12.5 = 275 feet

Therefore, total distance travelled by the ball after the fourth impact is 275 feet.

4 0

4 years ago