1. A body submerged in liquid is buoyed up by the force equal to the weight of displaced liquid: Archimedes' Principal of Buoyancy.
2. If an object such as a spring is elongated by a distance of x, then the restoring force f is exerted by the object proportionate to x: Hooke's Law of Elasticity.
3. Pressure, flow speed, and height can change the rate of flow: Bernoulli's Principal.
4. Total pressure of a mix of gasses in a container is equal to separate pressures serrate gasses would exert of one occupancy: Dalton's Law of Partial Pressures.
5. Heat flow is proportionate to the gradient of temperature difference: Fourier's Law of Heat Conduction.
Let's convert the initial height from feet to meters first:
The object is in free fall, so it is moving by uniformly accelerated motion with constant acceleration
(gravitational acceleration) from initial height h=121.9 m. Its vertical position at time t is given by
We want to know how long it will take to reach the ground, therefore we should calculate the time t at which the vertical position y(t) becomes zero:
rearranging,
Answer:
5.9 cm
Explanation:
We'll begin by calculating the spring constant (K) of the spring. This can be obtained as follow:
Force (F) = 15 N
Extention (e) = 3 cm
Spring constant (K) =.?
F = Ke
15 = K × 3
Divide both side by 3
K = 15 / 3
K = 5 N/cm
Therefore, the spring constant (K) is 5 N/cm.
Now, we shall determine how far the spring will stretch when a 3 kg candy is placed on the spring balance.
This can be obtained as follow:
First, we shall determine the weight of the object.
Mass of object = 3 Kg
Acceleration due to gravity (g) = 9.8 m/s²
Weight (W) =?
W = mg
W = 3 × 9.8
W = 29.4 N
Finally, we shall determine how far the spring will stretch as follow:
Weight (W) = Force (F) = 29.4 N
Spring constant (K) = 5 N/cm
Extention (e) =?
F = ke
29.4 = 5 × e
Divide both side by 5
e = 29.4 / 5
e = 5.88 ≈ 5.9 cm
Therefore, the spring will stretch 5.9 cm when a 3 kg candy is placed on the spring balance.
Answer:
1. the attractive force that holds atoms or ions together
2. the average distance between the nucleus of two bonded atoms
3. the angle formed by two bonds to the same atom
If you comb your hair and the comb becomes positively charged, then your hair becomes negatively charged.