Answer:
14.3kg
Explanation:
Given parameters:
Quantity of heat = 149000J
Change in temperature = 5.23°C
specific heat of the ice = 2000J/kg°C
Unknown:
Mass of the ice in the bag = ?
Solution:
The heat capacity of a substance is given as:
H = m c Ф
H is the heat capacity
m is the mass
c is the specific heat
Ф is the temperature change;
since m is the unknown, we make it the subject of the expression;
m = H/ mФ
m = = 14.3kg
Answer:
for any object in motion , distance is always greater than displacement
Answer:
1.29m/s
Explanation:
Since work and energy have same unit of measurement, then
kinetic energy of the block = 15J
M = 18kg
V =?
K.E = 1/2MV^2
V^2 = 2K.E /M
V^2 = (2 x 15)/18
Take the square root of both side
V = √[(2 x 15)/18]
V = 1.29m/s
The block moved with a velocity of 1.29m/s
To solve this problem we will apply the concepts related to the kinematic equations of linear motion. Where speed is described as the distance traveled in a given time, and the successive equivalences that can be made under that equation.
The distance traveled by the girl with in the given time is
The distance covered by the boy with in the given time is
Since the boy will travels with twice the speed of the girl
Half way between the two rafts at the beginnings is
The final distance between the two rafts at the instant the boy reached the central point of the line joining between them is
Therefore the distance that there is between the two rafts when the first one reaches the toy is 10.5m
Answer:
Central City is the county seat and the most populous municipality of Gilpin County. The city is a historic mining settlement founded in 1859 during the Pike's Peak Gold Rush and came to be known as the "Richest Square Mile on Earth".