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3 years ago

15

What is the net force on a bathroom scale when a 110 pound person stands on it? How do you know?

1 answer:

USPshnik [31]3 years ago

8 0

The scale is a rest scale reads the support for is not enough net force.

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Brewed coffee is often too hot to drink right away. you can cool it with an ice cube, but this dilutes it. or you can buy a devi

Dvinal [7]

<span>In order to answer this question you need to know the specific heat of aluminum and water. The source below says 0.900 J/g K and 4.186 J/g K respectively. Let T be the final temperature to be found: (0.900 J/g K) x (270 g) x (T - (-20))K = (243T + 4860) J gained by the Al (4.186 J/g K) x (500 g) x (85 - T)K = (177905 - 2093T ) J lost by the coffee Set the two expressions for heat gained/lost equal to each other: 243T + 4860 = 177905 - 2093T Solve for T algebraically: T = 74.1 Â°C</span>

8 0

3 years ago

A steel aircraft carrier is 370 m long when moving through the icy North Atlantic at a temperature of 2.0 °C. By how much does t

34kurt

Answer:

The carrier lengthen is 0.08436 m.

Explanation:

Given that,

Length = 370 m

Initial temperature = 2.0°C

Final temperature = 21°C

We need to calculate the change temperature

Using formula of change of temperature

$\Delta T=T_{f}-T_{i}$

$\Delta T=21-2.0$

$\Delta T=19^{\circ}C$

We need to calculate the carrier lengthen

Using formula of length

$\Delta L=\alpha_{steel}\times L_{0}\times\Delta T$

Put the value into the formula

$\Delta L=1.2\times10^{-5}\times370\times19$

$\Delta L=0.08436\ m$

Hence, The carrier lengthen is 0.08436 m.

8 0

3 years ago

Can you please help me with this physics question

erastova [34]

Answer:

See the answers below

Explanation:

We can solve both problems using vector sum.

a)

Let's assume the forces that help the diver dive as positive downward, and the forces that oppose upward, as negative

$F_{resultant}=100+30-85+900\\F_{resultant}=845[N]$

The drag force is horizontal d this way in the horizontal direction we will only have the drag force that produces the water stream.

$F_{drag}=50[N]$

b)

Let's assume the forces that propel the rocket upwards as positive and forces like the weight of the rocket and other elements as negative forces.

$F_{resultant}=960+7080-7700\\F_{resultant}=340 [kN]$

6 0

3 years ago

Which of the following is equivalent to 10 kilograms?

EleoNora [17]

a) 1000 grams = 1 kg ... no

d) 1000 centigrams

7 0

3 years ago

A car travels 60 miles in the first 2 hours and 68 miles in the next 2 hours

Gemiola [76]

32miles/hr

Explanation:

Given parameters:

Distance 1 = 60miles

Time 1 = 2hrs

Distance 2 = 68miles

Time 2 = 2hrs

Unknown:

Average speed of the car = ?

Solution:

Average speed is the total distance covered in a particular duration of time.

Average speed = $\frac{total distance}{total time taken}$

Total time taken = time 1 + time 2 = 2hrs + 2hrs = 4hrs

Total distance = distance 1 + distance 2 = 60miles + 68miles = 128miles

Average speed = $\frac{128miles}{4hrs}$ = 32miles/hr

learn more:

Motion brainly.com/question/2863017

#learnwithBrainly

6 0

4 years ago