The flashlight depends on batteries, the batteries contain chemical energy. When the flashlight turns on, there was also thermal energy caused by the heat of the lighting
Answer:
P = 2.18 atm
Explanation:
The strategy here here is to use the ideal gas law
PV = nRT
since we know the temperature, volume and the n, the number of moles is mass/MW, and R is the gas constant 0.08205 LatmK⁻¹mol⁻¹:
MW HI = 127.91 gmol⁻¹
P = ( mass / MW ) x R x T / V
P= (50.0 g / 127.91 gmol⁻¹ ) x 0.08205 LatmK⁻¹mol⁻¹ x 340 K/ 5.00 L
P = 2.18 atm
( rounded to three significant figures which is the number of significant figures for temperature, mass and volume )
Answer:
A. Refer to the figure.
B. The net force acting on the crate is
C. We should first find the acceleration of the crate using the following kinematics equation:
Mass of the crate can be found by Newton’s Second Law:
Answer:
4.08 kg
Explanation:
We can apply the Newton's second law of motion to find the mass of this object:
,
where 
is mass, and 
is acceleration, which is substituted by 
here. Now, plugging given numbers in the equation, we have
.
Solving for mass, we have
Answer:
Ay=v₂t + ½ gt² is the best choice to solve this problem.
The height of the cliff is = 176.4 meters.
Explanation:
Given,
initial velocity = 0m/s as it is dropped vertically
acceleration = g = 9.8 m/s²
time = 6s
Height =?
Using the equation Ay=v₂t + ½ gt², we can calculate Ay, which is the height.
So,
Ay=v₂t + ½ gt²
by substituting v, t, and g, we get:
Ay= 0 × 6 + ½ × 9.8 × 6²
Ay = 0 + 4.9 × 36
Ay = 176.4 m
