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Brums [2.3K]
2 years ago
15

2. A kg of iron and a kilo of lead, both at 1000 degrees Celsius, are kept on ice. It is discovered after some time that the iro

n has melted more ice than the lead. Why? 2 A vonal containing un or in kont in on oron The tomis motor an hoot​
Physics
1 answer:
Sunny_sXe [5.5K]2 years ago
8 0

The specific heat capacity of iron is greater than that of lead hence the iron will melt the ice more than the lead.

<h3>What is the specific heat capacity?</h3>

The specific heat capacity refers to the amount of heat that is required to raise the temperature of 1Kg of a body by 1 K.

We know that the specific heat capacity of iron is greater than that of lead hence the iron will melt the ice more than the lead.

Learn more about heat capacity:brainly.com/question/13499849

#SPJ1

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A solid sphere of radius R is made of an insulating material. It holds a charge, Q, which is distributed evenly throughout the s
Vinvika [58]

Answer:

The magnitude of Electric Field is E=\dfrac{Qr}{4\pi \epsilon_0 R^3}

Explanation:

Given:

  • Radius of the solid sphere=R
  • Total charge of the sphere=Q

Let consider a Gaussian surface at a distance of r such that  0<r>R in the shape of sphere such that the electric Field due to this E and it is radially outwards.

The charge inside this Gaussian surface volume we have , q_{in}=\dfrac{Qr^3}{R^3}

Now using Gauss Law we have

E\times4\pi r^2=\dfrac{q_{in}}{\epsilon_0}\\E\times4\pi r^2=\dfrac{\dfrac{Qr^3}{R^3}}{\epsilon_0}\\E=\dfrac{Qr}{4\pi \epsilon_0 R^3}

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3 years ago
Which statement is accurate about how the aurora borealis is formed?
g100num [7]

Answer:

When the electrons jump to a higher energy state, they release energy as electromagnetic radiation, light.

Explanation:

When the solar wind gets past the magnetic field and travels towards the Earth, it runs into the atmosphere. As the protons and electrons from the solar wind hit the particles in the Earth's atmosphere, they release energy – and this is what causes the northern lights.

7 0
3 years ago
How many people in the world like pizza you will recive credit for this awnser β
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3 quarters of the world likes pizza. (75%) and the remaining quarter of people (25%) dont like pizza.

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Read 2 more answers
A projectile proton with a speed of 500 m/s collides elastically with a target proton initially at rest. the two protons thenmov
Kay [80]

Because the two paths are perpendicular, therefore the target proton's new path must be at 30 degrees from the original direction. 

Using the law of conservation of momentum about the original direction: 
m (400 m/s) = m (v1) cos(60) + m (v2) cos(30) 
Cancelling m since the two protons have similar mass.
(v1)cos(60) + (v2)cos(30) = 500 m/s                         ---> 1

Now by using the law conservation of momentum perpendicular to the original direction: 
m (0 m/s) = m (v1) sin(60) – m (v2) sin(30) 
Which simplifies to:
(v1)sin(60) - (v2)sin(30) = 0 m/s                                
v2 = v1 * sin(60) / sin(30) = v1 * sqrt(3)                  ---> 2

Plugging equation 2 to equation 1: 
(v1) (1/2) + (v1 * sqrt(3)) sqrt(3)/2 = 500 m/s 
(1/2) (v1) + (3/2) (v1) = 500 m/s 
2 (v1) = 500 m/s 
v1 = 250 m/s 

Thus, from equation 2:

v2 = v1*sqrt(3) = (250 m/s) sqrt(3) = 433.01 m/s 


So,
A. The target proton's speed is about 433 m/s 
B. The projectile proton's speed is 250 m/s

8 0
4 years ago
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