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3 years ago

Somebody help me!! Why do you think it's called the International Space Station???

1 answer:

3 0

Dude this is an opinion you re read what chapter you read in class and then formulate an opinion but if you REALLY cant form one just comment and ill answer for you

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A 50-g chunk of 80 degrees C iron is dropped into a cavity in a very large block of ice at 0 degrees C. Show that 5.5 g of ice w

Alenkasestr [34]

Answer:

5.5g of ice melts when a 50g chunk of iron at 80°C is dropped into a cavity

Explanation:

The concept to solve this problem is given by Energy Transferred, the equation is given by,

$Q = mc\Delta T$

Where,

Q= Energy transferred

m = mass of water

c = specific heat capacity

$\Delta T =$ Temperature change (K or °C)

Replacing the values where mass is 50g and temperature is 80°C to 0°C we have,

$Q = mc\Delta T$

$Q = 50*0.11*(80-0)$

$Q = 440cal$

Then we can calculate the heat absorbed by m grams of ice at 0°C, then

$Q_2 = mL = 80*m$

How Q_1=Q_2, so

$80m=440$

$m=\frac{440}{80}$

$m = 5.5g$

Then 5.5g of ice melts when a 50g chunk of iron at 80°C is dropped into a cavity

7 0

4 years ago

Amy gets up from her seat on the train to move closer to the front of the train. Just as she begins to walk toward the front, th

Misha Larkins [42]

The answer is B this can be easily shown if you have ever gotten up on a bus its the same effect but if you have trouble just elimination works A and D are outrageous and wrong C i can see the confusion but a train or a bus making you go in motion but your body wants to keep moving so it keeps in motion

5 0

3 years ago

Exercising at a level thats beyond your regular daily activities is

DedPeter [7]

Healthy to get better at your daily activities but harmful to your body if you overdo it

4 0

4 years ago

Cathy, a 460-N actress playing Peter Pan, is hoisted above the stage in order to "fly" by a stagehand pulling with a force of 60

SCORPION-xisa [38]

Answer:7.67

Explanation:

Given

Weight of Cathy $W_1=460\ N$

Force exerted by rope $F=60\ N$

Mechanical advantage is the ratio of load by Pulling effort

$M.A.=\frac{Load}{Pulling\ effort}$

$M.A.=\frac{460}{60}$

$M.A.=7.67\ N$

8 0

3 years ago

if an object is thrown directly upwards remains in the air for 5.6s before it returns to its original position, how long did it

Mila [183]

Okay so an object gets thrown upwards so the half way point of the trip would be the maximum height (before it starts coming back down). if the object stays in the air for a total of 5.6s, then that is the time it takes to go up and come back down. to find the time to maximum height, half the time of the whole trip

5.6s/2 = 2.8s

6 0

4 years ago

Read 2 more answers