All categories

3 years ago

A 30 gram piece of iron is heated to 100°C and then dropped into

Physics

1 answer:

Hitman42 [59]3 years ago

8 0

Q= calories

m = mass

c = specific heat

∆t = temperature difference

Also, Qin = Qout

(as in the amount of energy lost by the iron equals the energy gained by water. the water) so the calories lost is as stated in pict.

You might be interested in

MIT’s robot cheetah can jump over obstacles 46. cm high and has speed of 12.0 km/h. a) If the robot launches itself at an angle

labwork [276]

Answer:

(a) $y_{max}=0.423m$

(b) $\alpha =64.3^{o}$

Explanation:

Given data

$v_{i}=12km/h=3.33m/s\\\alpha =60^{o}\\g=9.8m/s^{2}\\Required\\(a)y_{max}\\(b)Angle$

Solution

For Part (a)

As the velocity component in direction of y is given by:

$v_{yi}=v_{i}Sin\alpha \\v_{yi}=3.33Sin60\\v_{yi}=2.88m/s$

The maximum displacement is given by:

$v_{yf}^{2}=v_{yi}^{2}-2gy_{max}\\ y_{max}=\frac{(2.88)^{2}}{2(9.8)}\\ y_{max}=0.423m$

For Part (b)

To reach y=46cm =0.46m apply:

$0=v_{yi}^{2}-2(9.8)(0.46)\\v_{yi}=3m/s\\As\\Sin\alpha =\frac{v_{yi}}{v_{i}}\\\alpha =Sin^{-1}(\frac{v_{yi}}{v_{i}})\\\alpha =Sin^{-1}(\frac{3}{3.33} )\\\alpha =64.3^{o}$

5 0

3 years ago

Read 2 more answers

A 20-N force applied to the handle of a door produces a 44-N output force. What is the AMA of the handle?

Zepler [3.9K]

Method:

44 N / 20 N
AMA = 2.2

4 0

3 years ago

If the pressure of a substance is increased during a boiling process, will the temperature also increase, or will it remain cons

7nadin3 [17]

Answer:

on increasing pressure, temperature will also increase.

Explanation:

Considering the ideal gas equation as:

$PV=nRT$

where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature

R is Gas constant having value = 0.0821 L.atm/K.mol

Thus, at constant volume and number of moles, Pressure of the gas is directly proportional to the temperature of the gas.

P ∝ T

Also,

Also, using Gay-Lussac's law,

$\frac {P_1}{T_1}=\frac {P_2}{T_2}$

Thus, on increasing pressure, temperature will also increase.

4 0

3 years ago

What is the density of a 2 gallon milk jug that has a mass of 2.0 kg? Answer should be in g/ml.

kirill [66]

volume of milk is given as

$V = 2 Gallon$

we will convert it into mL unit

$V = 2 Gal = 7570.82 ml$

mass of the milk m = 2kg

m = 2000 g

now for the density we can use

$\rho = \frac{m}{V}$

$\rho = \frac{2000}{7570.82}$

$\rho = 0.264 g/mL$

<em>so the density is 0.264 g/mL for above sample</em>

8 0

4 years ago

Why does rhododendron not grow well in the terai region of nepal give reason

Andrews [41]

Answer:

Tge Rhododendrob is the national flower of Nepal. The hills and mountain sides ranges of Nepal are decorated with diff colours and shapes

3 0

3 years ago