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Answer: 2 protons.
Explanation:
1) The number of protons is indicated by the atomic number (Z)
2) Atomic number of uranium-238 and any uranium isotope is the same: 92. You find it in a periodic table.
So, the number of protons of uranium-238 is 92.
3) Atomic number of thorium-234 (and any thorium isotope) is 90, that is why it is told that it has 90 protons.
4) Therefore, the difference on the number of protons in each nucleus of uranium-238 and thorium-234 is 92 - 90 = 2.
Answer:
acceleration, a =
distance, d = 80 m
Given:
Initial velocity of object, v = 20 m/s
Final velocity of object, v' = 60 m/s
Time interval,
Solution:
(a) Acceleration is the rate at which velocity changes and constant acceleration is when the velocity changes by equal amount in equal intervals of time.
Thus
acceleration, a =
a =
(b) Now, the distance covered is given by:
Answer:
The volume will not contract to one fourth of the original.
Explanation:
Applying Charles's Law as:
Given ,
V₁ = ?
V₂ = 2 L
T₁ = 5 °C
T₂ = 20 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
So,
T₁ = (5 + 273.15) K = 278.15 K
T₂ = (20 + 273.15) K = 293.15 K
Using Charles law as:
Thus, the volume will not contract to one fourth of the original. (1/4 of 2 L is 0.5 L).
<h3>The mass of the body is 7.38 kg</h3>
Given,
- Acceleration of the object = 3.4 m/s²
- Net force = 25.1 N
We need to find,
Using Newton's first law of motion .
- Force = Mass × Acceleration
➵ 25.1 = Mass × 3.4
➵ 25.1 ÷ 3.4 = Mass
➵ Mass = 7.38 kg