Convert-
a) 42° to kelvin
b) 56k to °C
c) 37° to °F
d) 32° to °C

Answer:

Total Cost is 41.18 AED

Explanation:

Per day number of hours light bulbs were on=3hours

5 bulbs power consumption = 150Wx5 = 750W

Electricity usage per day = 750 x 3 = 2250Wh = 2.25kWh

April has 30 days and May has 31 days. Therefore totals days = 61days

Total power consumption = 2.25x 61 = 137.25kWh

Total Cost = 137.25x 0.30 = 41.175 AED

Answer:

light bends away from the normal when it moves from air into water-refraction

Answer: C.) Light slows down when it moves from air into water.

Explanation: i hope this helps :)

Answer:

Option C

Explanation:

Answer C is the correct option. water can be written as H₂O, which means that there are 2 Hydrogen atoms for every oxygen atom,  therefore it will occupy more space than oxygen and push more. there is also one more possibility, if the splitting takes place in Hoffman's Voltameter then the Hydrogen will be close to the cathode as hydrogen is positive. Otherwise, option C is correct answer. Hope this Helps you!

Answer: 0.86 × 10^14

Explanation:

Given the following :

Radius of proton = 1.2 × 10-15 m

Radius of hydrogen atom = 5.3 × 10-11 m

Density of proton could be calculated thus:

Mass of proton = 1.67 × 10^-27 kg

Using the formula :

(4/3) × pi × r^3

(4/3) × 3.142 × (1.2 × 10^-15)^3 = 7.24 × 10^-45

Density = mass / volume

Density = (1.67 × 10^-27) / ( 7.24 × 10^-45)

= 0.2306 × 10^18

Density of hydrogen atom:

Mass of hydrogen atom= 1.67 × 10^-27 kg

Using the formula :

(4/3) × pi × r^3

(4/3) × 3.142 × (5.3 × 10^-11)^3 = 6.24 × 10^-31

Density = mass / volume

Density = (1.67 × 10^-27) / ( 6.24 × 10^-31)

= 0.2676 × 10^4

Ratio is thus:

Density of proton / density of hydrogen atom

0.2306 × 10^18 / 0.2676 × 10^4 = 0.8617 × 10^14

Answer:

h = 11.47 m

Explanation:

Initial speed pf the t-shirt gun is 15 m/s

We need to find the maximum distance covered by the t-shirt. It is based on the conservation of energy. The maximum distance covered is given by :

[tex]h=\dfrac{u^2}{2g}\\\\h=\dfrac{(15)^2}{2\times 9.8}\\\\h=11.47\ m[/tex]

So, it will cover a distance of 11.47 m.

Answer:

D

Explanation:

Cool air sinks because it's denser and warm rises because it's less dense.

This is the principle you have in your air conditioning.

As the air is cooled it keeps falling that's why it's necessary to tilt the vents of of an AC at 45° so that the cold air would be well circulated.

Answer:

0.15m

Explanation:

Given the following :

angular diameter = 22 arc seconds

Distance = 1400 m

The linear diameter(D) could be calculated using the small angle formular :

Where ;

D = (angular size × distance) / 1 radian

Note :

1 radian = 360°/2pi = 360/(2 × 3.14) = 57.296°

1° = 3600 arc seconds

57.296° × 3600 = 206265.6

Therefore,

D = (22 × 1400) / 206,265.6

D = 30800 / 206,265.6

D = 0.1493220

Answer:

Matter - The ball itself

Energy - the motion of the ball as they reach different height.

Explanation:

The aspect of the event which relates to matter is the ball itself being described above, this us because, the ball is a physical substance or material which possesses mass and occupies space.

The aspect which relates to energy in the event described above is the motion of the ball when bounced off the floor, changing from potential to kinetic energy depending on the height attained, at any instance, the total energy is the sum of the kinetic and potential energy, however, at maximum height, at rest, Potential energy is maximum with kinetic energy equal zero, at maximum height, kinetic energy then start to increase with height until it reaches it's the maximum height, where the direction changes, at this point kinetic energy turns to zero. Therefore, the motion of the ball and height attained relates to energy.

The question is incomplete as it does not have the options which are:

The waves have a trough.

Particles move only small distances.

particles travel the length of the wave, moving in an up-and-down motion.

The waves have a crest.

The energy is transferred perpendicular to the direction of the wave motion.

Answer:

Explanation:

Transverse waves are the waves which can be characterised easily by their oscillation in a perpendicular direction to the path of the wave propagation.

The particle follows the wave nature and moves only to a small distance like ripples in the water and these waves possess the trough, the lower part and the crest the upper part.

These waves can be observed in ripples of the water, in a string of the guitar while playing and the electromagnetic waves.

Thus, the selected options are correct.

Answer:

process of recombination

Explanation:

this process happens when 2 molecules of DNA exchange pieces of their genetic material with each other

Answer:

0.08 J

Explanation:

EE = ½ kx²

EE = ½ (400 N/m) (0.02 m)²

EE = 0.08 J

The energy stored in the spring, if the force constant is 400N/m is 0.08 J.

When the spring is compressed, it gets compressed up to its elastic limit. When load is removed from the spring, it regains its shape and obtains equilibrium position. The energy stored in this process is called  as spring potential energy.

Given a spring is compressed by 0.02m. The force constant is 400N/m. The energy stored in the spring is given by

SPE = ½ kx²

SPE = ½ (400 N/m) (0.02 m)²

SPE = 0.08 J

Thus, the energy stored in the spring is 0.08 J.

Learn more about spring potential energy.

https://brainly.com/question/12528339

#SPJ2

Answer:

Length of hole (s) = 362.77 m (Approx)

Explanation:

Given:

Time taken to hit the bottom (t) = 8.6 s

Acceleration due to gravity (g) = 9.81 m/s²

Find:

Length of hole (s) = ?

Computation:

Initial velocity (u) = 0 m/s

S = ut +1/2(gt²)

S = (0)(8.6) +1/2(9.81)(8.6)(8.6)

S = 1/2(9.81)(8.6)(8.6)

S = 1/2(9.81)(8.6)(8.6)

S = 362.7738

Length of hole (s) = 362.77 m (Approx)

Answer: I think the answer to this question is D.The rubbing moves electrons to the object that holds them more tightly

Explanation:

When one object is rubbed against another, static electricity can be created. This is because the rubbing creates a negative charge that is carried by electrons. ... Similarly, when you rub a balloon on your head it causes opposite static charges to build up both on your hair and the balloon

Answer:

is it George Lemaitre?

Explanation:

sorry if i'm not helpful

Answer:

The relationship between light and matter produces three phenomena, namely:

Explanation:

In everyday use, reflective materials are used on construction apparel, handheld electric torch, headlamp of vehicles etc.

     2. Absorption:  When matter captures electromagnetic radiation, it converts the energy of photons into internal energy and absorption is said to have taken place.  

Light absorption by the chlorophyll in plants for use in production is an example of how humans use light absorption albeit indirectly.

     3.  Transmission        

When matter is transparent or semi-transparent it allows light to pass through. For semi-transparent matter, some of the light is absorbed.

Transmission of light is used predominantly in various kinds of lighting effects for interior decoration and houses.

     4. Emission

When matter releases energy as light, it is said to have emitted light.

Examples of everyday emission of light include Light Emitting Diode which is used in remote controls.

Cheers!

Answer:

Revolutions made before attaining angular velocity of 30 rad/s:

θ = 3.92 revolutions

Explanation:

Given that:

L(final) = 10.7 kgm²/s

L(initial) = 0

time = 8s

Torque is the rate of change of angular momentum:

[tex]T = \frac{L(final)-L(initial)}{t}\\T = \frac{10.7-0}{8}\\T=1.34 Nm[/tex]

We know that

T = Iα

α = T/I

where I = moment of inertia = 2.2kgm²

α = 1.34/2.2

α = 0.61 rad/s²

We know that angular equation of motion is:

ω²(final) = ω²(initial) +2αθ

(30 rad/s)² = 0 + 2(0.61 rad/s²)θ

θ = (30 rad/s)²/ 2(0.61 rad/s²)

θ = 24.6 radians

Convert it into revolutions:

θ = 24.6/ 2π

θ = 3.92 revolutions

Answer  34

Explanation:

Answer:

The dog moved 6 meters west and 34 meters total

Explanation:

Answer:

a and c

Explanation:

a)light moves in a straight line and distracts when it encounters an obstacle forming a shadow

c)the light rays from that object or also tgose from the image must enter your eye for you to see that image

Answer:

W(mg) = -5000j

Explanation:

Work done by weight force is = - mgh ==>mg = w & 1000cm = 1m ==> -5000 (1)= -5000j

it is what I can calculate for this question

Answer:

can you make it clear i do not understand.

Explanation:

Answer:

1°C

Explanation:

Water freezes at 0°C, 32°F, and 273°K.

The only temperature warmer than the freezing point is 1°C.

Answer:

A. 0 F

Explanation:

Test approved

Answer:

v = 51.60 m/s

Explanation:

To calculate the velocity of the Earth around the sun you use the following formula, which comes from the universal gravitational Law:

[tex]v=\sqrt{\frac{GM_E}{r}}[/tex]

M_E: Earth's mass = 5.97*10^24 kg

r: distance between the Sun and the Earth = 149 600 000 km =m

G: Cavendish's constant = 6.674×10−11 m3⋅kg−1⋅s−2

You replace the values of G, M_E and r in the equation for v:

[tex]v=\sqrt{\frac{(6.674*10^{-11}m^3/kgs^2)(5.97*10^{24} kg)}{ 1.496*10^{11}m }}\\\\v=51.60\frac{m}{s}[/tex]

hence, the velocity of traslation of the Earth is 51.60 m/s

Answer:

2,678,400

Explanation:

31 days in March

1 minute has 60 seconds

1 hour has 3600 seconds

24 hours in one day

24 hours has 1440 seconds

24hour have 86,400sec

31×86,400=2,678,400 sec

Answer:

Length of longer pendulum = 99.3 cm

Length of shorter pendulum = 82.2 cm

Explanation:

Since the longer pendulum undergoes 10 oscillations in 20 s, its period T = 20 s/10 = 2 s.

From T = 2π√(l/g), the length of the pendulum. l = T²g/4π²

substituting T = 2s and g = 9.8 m/s² we have

l = T²g/4π²

= (2 s)² × 9.8 m/s² ÷ 4π²

= 39.2 m ÷ 4π²

= 0.993 m

= 99.3 cm

Now, for the shorter pendulum to be in step with the longer pendulum, it must have completed some oscillations more than the longer pendulum. Let x be the number of oscillations more in t = 20 s. Let n₁ = number of oscillations of longer pendulum and n₂ = number of oscillations of longer pendulum.

So, n₂ = n₁ + x. Also n₁ = t/T₁ and n₂ = t/T₂ where T₂ = period of shorter pendulum.

t/T₂ = t/T₁ + x

1/T₂ = 1/T₁ + x  (1)

Also, the T₂ = t/n₂ = t/(n₁ + x)  (2)

From (1) T₂ = T₁/(T₁ + x) (3)

equating (2) and (3) we have

t/(n₁ + x) = T₁/(T₁ + x)

substituting t = 20 s and n₁ = 10 and T₁ = 2s, we have

20 s/(10 + x) = 2/(2 + x)

10/(10 + x) = 1/(2 + x)

(10 + x)/10 = (2 + x)

(10 + x) = 10(2 + x)

10 + x = 20 + 10x

collecting like terms

10x - x = 20 - 10

9x = 10

x = 10/9

x = 1.11

x ≅ 1 oscillation

substituting x into (2)

T₂ = t/n₂ = t/(n₁ + x)

= 20/(10 + 1)

= 20/11

= 1.82 s

Since length l = T²g/4π²

substituting T = 1.82 s and g = 9.8 m/s² we have

l = T²g/4π²

= (1.82 s)² × 9.8 m/s² ÷ 4π²

= 32.46 m ÷ 4π²

= 0.822 m

= 82.2 cm

Answer:

1.52 kJ

Explanation:

Total kinetic energy in gas K = 3NkT/2 where N = number of molecules, K = Boltzmann constant and T = temperature.

Also from the ideal gas law, PV = NkT

substituting PV into K above

K = 3PV/2 where P = pressure = 1.013 × 10⁵ N/m² and V = volume of gas = 5 litres = 5 dm³ = 5 × 10⁻³ m³

K = 3 × 1.013 × 10⁵ N/m² × 5 × 10⁻³ m³/2

= 1519.5 J

= 1.5195 kJ

≅ 1.52 kJ

Explanation:

We have,

Initial speed of a softball is 3.89 m/s

Deceleration of the ball is -1.44 m/s²

Distance covered by the ball is 4.8 m

It is required to find the time that the ball take when it slides. Let t is time. Using second equation of motion :

[tex]h=ut+\dfrac{1}{2}at^2[/tex]

Putting all the values we get :

[tex]4.8=3.89t+\dfrac{1}{2}(-1.44)t^2\\\\4.8=3.89t-0.72t^2\\\\t=1.9\ s \ \text{and}\ t=3.49\ s[/tex]

Answer:

The tin fork and knife, the copper coin, and the steel fence pole.

Explanation:

Those are both what people would call soft metals so they are malleable to the extent of probably not needing heavy duty equipment. It depends on you description of malleable because the steel fence pole could be malleable with the correct equipment and not snap in half if bent slowly enough.

The definition of malleable: (of a metal or other material) able to be hammered or pressed permanently out of shape without breaking or cracking.

But the glass table, marble sculpture and antique ceramic vase are nowhere near malleable because if you tried bending them they wouldn't bend but would shatter and break into pieces.

The tin fork and knife, the copper coin, and the steel fence pole are malleable, the correct option is A, C, and F.

A malleable material is one that can be easily formed into a thin sheet by hammering. The most malleable metal is gold. In contrast, ductility is a solid material's ability to deform under tensile stress.

Metals are malleable because when a force is applied, layers of ions can slide over each other. Metallic bonding allows metal to change shape without breaking.

Gold, iron, aluminum, copper, silver, and lead are examples of malleable metals. Ductility and malleability do not always correlate; for example, gold is both ductile and malleable, whereas lead is only malleable.

Tin fork and knife, copper coin, and steel fence pole are all malleable.

Thus, the correct options are A, C, and F.

For more details regarding malleable objects, visit:

#SPJ6

false

hope this help

lf I'm write can you give me a brainlist please

Answer:

when light falls on denser medium it may be reflected back or enters the medium and if it enters the medium it refracts towards the normal line of the medium.