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2 years ago

7

What is the specific heat of a material that has a mass of 5 grams and increases 125ºC when it receives 150J of heat?

2 answers:

solmaris [256]2 years ago

8 0

0.24. Is your correct answer if that’s one of the options

rjkz [21]2 years ago

6 0

Answer:

0.24 ? I hope that was the answer you were looking for.

Explanation:

You might be interested in

What net is required to push a sofa with a mass of 59 kilograms so that it accelerates at 9.75 meters/second^2 (assume a flat,fr

stich3 [128]

Newton's 2nd Law of Motion: Force = (mass) · (acceleration)

Do I need to go any further ?

I get 575.25 Newtons .

Oh ! Look at that ! Right there at the top, it says "Using Newton's Second Law". This might have suggested to you that maybe you could solve the problem by using Newton's Second Law.

8 0

2 years ago

Find the magnitude of this<br> vector:

xeze [42]

Answer: = 25. 5 m

Explanation:

2-D vectors can be solved using the Pythagorean theorem:
$a^{2} +b^{2} =c^{2}$
The hypotenuse, or longest side is not given and that is what must be solved for
Direction can be omitted as the question only asks for magnitude
Magnitude: is the distance or quantity in which an object moves during motion

Solve for C using Pythagorean theorem:

1. $\sqrt{a^{2}+b^{2} }=c$

2. $\sqrt{22.2 m ^{2} +12.6m^{2} } =c$

3. $25.52646 m= c$

round to lowest number of significant digits when dividing and multiplying
rounded to 3 significant digits

∴ Magnitude of the vector is 25.5 m

3 0

1 year ago

A suspension bridge is 60.0 m above the level base of a gorge. A stone is thrown or dropped from the bridge. Ignore air resistan

Alexxx [7]

Answer:

a) $t_{1}=3.49s$

b) $t_{2}=2.00s$

c)Xmax=80.71m

Explanation:

<u>a)Kinematics equation for the Stone, dropped:</u>

$v(t)=v_{o}-g*t$

$y(t)=y_{o}+v_{o}t-1/2*g*t^{2}$

$y_{o}=h=60m$ initial position is bridge height

$v_{o}=0m/s$ the stone is dropped

The ball reaches the ground, y=0, at t=t1:

$0=h-1/2*g*t_{1}^{2}$

$t_{1}=\sqrt{2h/g}=\sqrt{2*60/9.83}=3.49s$

<u>b)Kinematics equation for the Stone, with a initial speed of 20m/s:</u>

$v(t)=v_{o}-g*t$

$y(t)=y_{o}+v_{o}t-1/2*g*t^{2}$

$y_{o}=h=60m$ initial position is bridge height

$v_{o}=-20m/s$ the stone is thrown straight down

The ball reaches the ground, y=0, at t=t1:

$0=h+v_{o}t_{2}-1/2*g*t_{2}^{2}$

$0=60-20t_{2}-1/2*9.83*t_{2}^{2}$

t2=-6.01 this solution does not have physical sense

t2=2.00

<u>c)Kinematics equation for the Stone, with a initial speed of 20m/s with an angle of 30° above the horizontal:</u>

$v(t)=v_{o}-g*t$

$y(t)=y_{o}+v_{o}t-1/2*g*t^{2}$

$y_{o}=h=60m$ initial position is bridge height

$v_{o}=20sin(30)=10m/s$ the stone is thrown with an angle of 30° above the horizontal

The ball reaches the ground, y=0, at t=t3:

$0=h+v_{o}t_{3}-1/2*g*t_{3}^{2}$

$0=60+10t_{3}-1/2*9.83*t_{3}^{2}$

t3=-2.62 this solution does not have physical sense

t3=4.66

the movement in x:

v=constant=20cos(30)m/s

x(t)=v*t

Xmax=v*t3=20cos(30)*4.66=80.71m

3 0

2 years ago

Volume is the space occupied by a quantity of matter. <br> a.true <br> b.false

Solnce55 [7]

A. The answer is True

7 0

3 years ago

Read 2 more answers

suppose that a block is pulled 16 meters across a floor. what amount of work is done if the force used to drag the block is 22n

kompoz [17]

Work = (force) x (distance)

Work = (22 N) x (16 m)

<em>Work = 352 Joules</em>

4 0

2 years ago