Answer:
0.617m/s = 61.7cm/s
Explanation:
To find the values of the velocity you take into account the following formula:
(1)
That is, total work equals the change in the kinetic energy.
v_o: initial velocity = 0
m: mass = 2.50kg
The total work is:
(2)
x: the distance in wich the spring has been compressed
d: distance of the work
you will calculate v for a distance d = 0.0150m. By replacing in (2) and taking into account (2) you obtain:
hence, the velocity is 0.617m/s = 61.7cm/s
Answer:
Sound travels faster in liquids than in gases because molecules are packed more closely together. This means that when the water molecules begin to vibrate, they quickly begin to collide with each other forming a rapidly moving compression wave. Sound travels over four times faster than in air
Explanation:
Speed is the distance travelled by an object whereas velocity is distance travelled by an object per unit time in a given direction.
Answer;
= 0.018 mm
Explanation;
Mass = 12 ounces
1 ounce = 28.4 g
thus mass in g = 12 × 28.4 = 340.8 g
Volume = mass/density
= 340.8 g /2.70 g/cm³
= 126 cm³
The thickness from volume and area;
thickness = volume/ area
Area = 75 square ft
1 Square ft = 929.03 square centimeter
Thickness = 126 cm³/ (75 × 929.03)
= 0.001808 cm
but, 1 cm = 10 mm
Therefore; 0.001808 ×10 = 0.01808 mm
= 0.018 mm ( 3 decimal places)
Answer:
The magnitude of charge is 7.15 nC.
Explanation:
Given that,
Electric field = 4.70 N/C
Distance = 3.70 m
We need to calculate the magnitude of charge
Using formula of electric field
Where, k = Boltzmann constant
r = distance
q = charge
E = electric field
Put the value into the formula
Hence, The magnitude of charge is 7.15 nC.