Answer:
% of water boils away= 12.64 %
Explanation:
given,
volume of block = 50 cm³ removed from temperature of furnace = 800°C
mass of water = 200 mL = 200 g
temperature of water = 20° C
the density of iron = 7.874 g/cm³ ,
so the mass of iron(m₁) = density × volume = 7.874 × 50 g = 393.7 g
the specific heat of iron C₁ = 0.450 J/g⁰C
the specific heat of water Cw= 4.18 J/g⁰C
latent heat of vaporization of water is L_v = 2260 k J/kg = 2260 J/g
loss of heat from iron is equal to the gain of heat for the water
m₂ = 25.28 g
25.28 water will be vaporized
% of water boils away =
% of water boils away= 12.64 %
The decline in the anchovy industry of Peru is blamed on <span>El Niño.</span>
The core accretion model. Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. ... Earth's rocky core formed first, with heavy elements colliding and binding together. Dense material sank to the center, while the lighter material created the crust
Answer:
2.51 m/s
Explanation:
Formula for Centripetal Acceleration
a_{c} =\frac{v^{2} }{r}
where v= velocity of the girl swinging through a rope and
r=radius of the circle she is moving in ie. the length of the rope assuming its attached till the center of the tire of negligible dimension.
Given
m/
r=2.1 m
v=??(in m)
Plugging in the values
3 =\frac{v^{2} }{2.1}
=3 × 2.1
= 6.3
v=
v=2.5099 m/s ≈ 2.51 m/s
Two balls having different speeds roll off the edge of a horizontal table at the same time, both will hit the floor at the same time.
<h3>What is velocity?</h3>
Velocity is defined in physics as a vector measurement of direction and velocity of motion. More specifically, the velocity of an object can also be defined as the rate of change of the object's position with respect to the reference frame and time. Simply put, the term velocity describes how fast an object moves in a particular direction. Indicates whether something is moving slowly or quickly. Let's look at an example where two objects are moving. If two objects are moving in the same direction, it's easy to tell which is moving faster. However, it is very difficult to determine which object is faster when both are moving in opposite directions. Considering such difficulties and ways to overcome them, our scientists developed the concept of velocity to make it easier for observers to identify faster or slower objects.
Both balls will hit the ground simultaneously. This is because both balls were moving parallel to the ground when they left the table (remember the table is horizontal). Both balls have 0 velocity in the direction of interest, both accelerate at the same velocity and land at the same time.
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