Answer:
strontium has 50 neutrons
Answer:
775 grams of ice
Explanation:
Heat loss by patient = heat gained by ice
Heat loss by patient = mass×specific heat capacity×(initial temperature - final temperature) = 62×4200×(40-39) = 260,400J
Heat gained by ice = mass × specific latent heat of fusion of ice = m×336000 = 336000m J
336000m = 260,400
m = 260400/336000 = 0.775kg = 0.775×1000 grams = 775 grams of ice
Answer:
refraction
Explanation:
When a ray of light passes from one medium to another medium, it deviates from its path, this phenomenon is called refraction.
When the ray passes from rarer medium to denser medium it bends towards the normal and if the ray passes from denser medium to rarer medium, it bends away from the normal.
Here, the ray passes from air to glass, so refraction takes place.
Answer:
56.0 m
Explanation:
We know that after 0.510 s, the ball is level with Bob again. We can use this to find the vertical component of the initial velocity.
y = y₀ + v₀ᵧ t + ½ gt²
h+2 = h+2 + v₀ᵧ (0.510) + ½ (-9.8) (0.510)²
v₀ᵧ = 2.50 m/s
Since the magnitude is 34.1 m/s, we can now find the horizontal component:
v₀² = v₀ₓ² + v₀ᵧ²
(34.1)² = v₀ₓ² + (2.50)²
v₀ₓ = 34.0 m/s
And since we know the ball lands 126 m from the base of the cliff, we can find the time it takes to land:
x = x₀ + v₀ₓ t + ½ at²
126 = 0 + (34.0) t + ½ (0) t²
t = 3.71 s
Finally, we can now find the height of the cliff:
y = y₀ + v₀ᵧ t + ½ gt²
0 = h+2 + (2.50) (3.71) + ½ (-9.8) (3.71)²
h = 56.0 m
I believe that the rate of solution is a measure of how fast a substance dissolves. The rate of solution depends on several factors which include; size of the particles, stirring, the amount of solute already dissolved, and temperature.
Considering the size particles, breaking a solute into smaller pieces increases its surface area and also increases its rate of solution, stirring allows the solute to dissolve faster and also increasing temperature increases the rate of at which the solute will dissolve and also the amount of solute that will dissolve.
