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Yuki888 [10]
3 years ago
9

It requires 350 joules to raise a certain amount of a substance from 10.0°C to 30.0°

Physics
2 answers:
Hitman42 [59]3 years ago
5 0
The answer is 15g, you would use the specific heat formaula
malfutka [58]3 years ago
3 0

Answer:

m=14.6g

Explanation:

You can use the equation Q=cm(T_{2}-T_{1}) where Q is the heat, c is the specific heat of the substance, T_{2} and T_{1} are temperature and m is the mass of the substance.

Solving for m we have:

m=\frac{Q}{c(T_{2}-T_{1})}

The problem gives you the information about the variables:

Q=350J

c=1.2\frac{J}{g^{o}C}

T_{1}=10.0^{o}C

T_{2}=30.0^{o}C

Replacing that values:

m=\frac{350J}{1.2\frac{J}{g^{o}C}(30.0^{o}C-10.0^{o}C)}

m=\frac{350J}{1.2\frac{J}{g^{o}C}(20.0^{o}C)}

m=14.6g

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olga_2 [115]

Answer:

The velocity of the rocket is 7.8 m/s

Explanation:

3 0
2 years ago
The surface of the Earth changes from processe such as erosion. Which of these changes to Earth's surface is an example of erosi
Ad libitum [116K]

Answer:

D. the wind picking up dust and carrying it

Explanation:

Erosion is a process in which an agent transfer the top soil to another region, thereby exposing the lower soil. These agents have the ability to move the top layer of soil and deposit it at another place. The major agents in this case are; a running or flowing body of water and wind.

Therefore, the change to the Earth's surface that is an example of erosion is the wind picking up dust and carrying it. Thereby exposing the lower layers.

6 0
2 years ago
A mass m is attached to a string connected to a force sensor on a rotating platform. The platform’s angular velocity, ω, can be
makkiz [27]

Answer:

The mass m is 0.332 kg or 332 gm

Explanation:

Given

The platform is rotating with angular speed , \omega =8.5\, \frac{rad}{sec}

Mass m is moving on platform in a circle with radius , r=0.20\, m

Force sensor reading to which spring is attached , F=4.8\, N

Now for the mass m to move in circle the required centripetal force is given by F=m\omega ^{2}r

=>4.8=m\times 8.5 ^{2}\times 0.20

=>m=0.332\, kg

Thus the mass m is 0.332 kg or 332 gm

7 0
3 years ago
PLEASE HELP!!! <br><br> i’ll mark brainliest if you’re correct
dedylja [7]

\qquad \qquad\huge \underline{\boxed{\sf Answer}}

The net force acting on the block is ~

\qquad \sf  \dashrightarrow \: 10 + 5

\qquad \sf  \dashrightarrow \: 15 \:N

So, the Answer in the boxes will be ~

\boxed{ \sf15} \:  \boxed{ \sf N}

7 0
2 years ago
Physicist Max Planck showed how objects like stars give off different colors based on their temperature. What color are the hott
jenyasd209 [6]

Answer:

the brightest found are Blue - White with

Explanation:

The energy emission of objects increases with their temperature, specifically Wien described the process in an expression

 

          \lambda_{maximum} T = 2,898 10⁻³

With this expression we can find the temperature of the stars by the color they emit.

Specifically the Sun has a color of 550 nm which corresponds to 5400K

bright stars have a BLUE color corresponding to 7500K

the brightest found are Blue - White with a temperature of 20000K

7 0
3 years ago
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