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Softa [21]
3 years ago
15

When a 15.00 kg mass is attached to a vertical spring, the spring is stretched 2.0 m such that the mass is 6.0 m above the table

. The spring constant is 400.0N/m? What is the total potential energy associated with this system?
Physics
1 answer:
Marysya12 [62]3 years ago
3 0

Answer:

idk

Explanation:

idk

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Which of the following elements is more reactive than the others
AURORKA [14]

Answer:

Sulfur

Selenium

Nitrogen

Oxygen

Explanation:

Sulfur is the most reactive out of the four and Oxygen is the least reactive out of the four.

5 0
3 years ago
The thrust of a certain boat’s engine generates a power of 10kW as the boat moves at constant speed 10ms through the water of a
Lunna [17]

Answer:

The change in power is 4400 W.

Explanation:

Given that,

Power = 10 kW

Speed = 10 m/s

Increases speed = 12 m/s

Given equation is,

F=kv

We know that,

The power is,

P=Fv

Put the value of F into the formula

P=(kv)v

P=kv^2

P\propto v^2

We need to calculate the new power

Using formula for power

\dfrac{P}{P'}=\dfrac{v^2}{v'^2}

Put the value into the formula

\dfrac{10}{P'}=(\dfrac{10}{12})^2

P'=(\dfrac{12}{10})^2\times10

P'=14.4\ kW

We need to calculate the change in power

Using formula of change in power

\Delta P=P'-P

Put the value into the formula

\Delta P=14.4-10

\Delta P=4.4\ kW

\Delta P=4.4\times1000

\Delta P=4400\ W

Hence, The change in power is 4400 W.

6 0
4 years ago
A 0.0400-g positive charged ball with charge q = 6.40 μC is resting on a flat, frictionless horizontal surface. For a time of t
Leto [7]

Answer:

The height is 0.1014 m

Explanation:

Given that,

Mass = 0.0400 g

Charge q= 6.40\ \mu C

Time t = 0.0420 s

Electric field E=7.80\times10^{2}\ N/C

We need to calculate the electric force on the particle

Using formula of electric force

F=qE

Put the value into the formula

F_{e}=6.40\times10^{-6}\times7.80\times10^{2}

F_{e}=0.004992= 0.499\times10^{-2}\ N

We need to calculate the gravitational force

Using formula of force

F=mg

Put the value into the formula

F_{g}=0.0400\times10^{-3}\times9.8

F_{g}=0.000392 = 0.392\times10^{-3}\ N

We need to calculate the net force

F_{net}=F_{e}-F_{g}

F_{net}=0.499\times10^{-2}-0.392\times10^{-3}

F_{net}=0.004598= 0.4598\times10^{-2}\ N

We need to calculate the acceleration

Using newton's law

F = ma

a = \dfrac{F}{m}

a=\dfrac{0.4598\times10^{-2}}{0.0400\times10^{-3}}

a =114.95\ m/s^2

We need to calculate the height

Using equation of motion

s = ut+\dfrac{1}{2}at^2

s=0+\dfrac{1}{2}\times114.95\times(0.0420)^2

s=0.1014\ m

Hence, The height is 0.1014 m

3 0
3 years ago
How can atoms make up all of the substances around you
ch4aika [34]
How can atoms make up all of the substances around you? Because there are a lot of atoms in the substances. ... If atoms are made of smaller parts such as electrons,why are atoms considered the basic unit of matter? It is the smallest unit that has the chemical property's of an element.
6 0
3 years ago
A few alpha particles bounce off a thin sheet of gold foil. What did scientists
Vilka [71]

Answer:

I world say A is the answer 80% sure

7 0
2 years ago
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