Other Physics Answers

Illustrate the stress and strain of solids.

2. What do you mean by the Young’s modulus for steel is 𝒀 = 𝟐. 𝟎 × 𝟏𝟎𝟏𝟏 𝑵𝒎−𝟐

? Explain

briefly.

3. Gold has a face centered cubic unit cell and has the density 𝟏𝟗. 𝟑 𝒈 𝒄𝒎−𝟑

. Calculate the

length along an edge. (𝐴𝑢 = 197 𝑔 𝑚𝑜𝑙

−1

)

4. Write down five real life applications of surface tension.

5. A capillary tube with an inside diameter of 𝟓𝟒𝟎 𝝁𝒎 can support a 𝟏𝟎𝟎 𝒎𝒎 column of liquid

that has a density of 𝟏𝟑𝟓𝟎𝟎 𝒌𝒈𝒎−𝟑

. If 𝒉 = 𝟎. 𝟏 then is it possible to find the surface tension

of the liquid? If not, then write down the reason.

6. Write a short note on polymer materials and amorphous solid.

A 2.0 kg ice cube at 0 oC is placed in 22 kg of water at 25 oC. Determine the final

temperature of the mixture. [Given the specific heat of water, cw is 4186 J/kg oC and the

latent heat of fusion of water, Lf is 3.33 ×105 J/kg]

Calculate the speed and velocity for a car that went a distance of 12.5 km west in 2 hours. (Please show the solution)

Rasta jump from a building 34 m above the ground. What is the velocity of Rasta at the end of 2.5 seconds? What time ut takes to hit the ground? (Please show the solution)

Train starts at 37 m/s to 12 m/s after 5 seconds. What is the acceleration of the train at this time? How far from starting point to the point after 5 seconds does the train travel? (Please show the solution)

Miriam was so happy that she is the first honor and she cannot wait to tell her parents about it. So, she ran from SCNHS Campus to her house which is 4.6 km north away. Upon reaching her house, her mother was in their hacienda which is 150 meters north away from their house, so she ran again until she reached her mother. What is the total distance and displacement of Miriam in meters? (Please show the solution for convention)

After shopping, Leni decided to go home and she travelled 3 km east to fetch her sister. Then, she proceeded to another 900 meters to reach their house. What is the total distance and displacement of Leni in km? What is the total distance and displacement of her sister in km? (Please show the solution)

Bong-bong swam 3 laps in a 50-m pool. What is his total distance and total displacement? (Please show the solution)

Find the sum of the vector using the component method. Please show the solution.

(vec) A = 5m, 25°

(vec) B = 11m, 125°

(vec) C = 25m, 35°

Note:

(vec) R = (vec) A + (vec) B + (vec) C

3. Calculate

a. The force on an electron which is stationary in

I. A magnetic field of flux density 2.5T

ii. An electric field of intensity 1000V/m

b. The force on an electron moving with a velocity of 1.5×10^6m/s at right angles to

I. A magnetic field of flux density 1.5T

ii. An electric field of intensity 2000V/m