If the axes of the two cylinders are parallel, but displaced from each other by a distance d, determine the resulting electric f

Answer:

change in KE = -12.95 Btu

Explanation:

provided data

mass = 3000-lbm

initial velocity of vehicle vi = 10 mph = 14ft/s

final velocity of vehicle vf = 0 mph = 0 ft/s

solution

the crumple zone is designed to absorb kinetic energy upon impact

thus the change in KE is related to the initial and final speeds, expressed as:

change in KE = 0.5 × m × (vf² - vi² ).................1

Substituting in the parameters yields:

change in KE = 0.5 × 3000 × (0² - 14.7² )

change in KE = -324135 × *  

change in KE = -12.95 Btu

The energy contained in a photon is determined by the formula:

where h represents the Planck constant and f signifies the frequency of the photon. Given the energy of the photon, , we can rearrange the equation to deduce the photon's frequency:


Now, we can use the relationship that links frequency f, wavelength , and the speed of light c to ascertain the wavelength of the photon:

Complete Question:

Picture yourself on an aluminum ladder on the ground, attempting to fix an electrical connection with a metal screwdriver featuring a metallic handle. Since you are sweating profusely, your body has a resistance of 1.60 kΩ.

(a) If you accidentally contact the "hot" wire from the 120 V power line, what current will flow through your body?

(b) What is the amount of electrical power transferred to your body?

Answer:

(a) 0.075A

(b) 9W

Explanation:

According to Ohm's law, the voltage (V) applied to or passing through a body corresponds to the current (I) via the relationship:

V ∝ I

=> V = I x R                 ----------------------(i)

Where;

R denotes the resistance of the body

(a) As mentioned;

Due to wet conditions, the body will conduct electricity, and possesses the following values;

V = supplied voltage = 120V

R = resistance of the wet body = 1.60kΩ = 1.6 x 1000Ω = 1600Ω

Substituting these values into equation(i):

120 = I x 1600

To find I;

I =

I = 0.075A

Thus the current passing through your body is 0.075A

(b) Electrical power (P), which is expressed in Watts (W), delivered to the body is the product of current (I) and voltage (V) received. Thus:

P = I x V           ---------------------(ii)

Where;

I equates to 0.075A   [as derived above]

V is 120V     [as outlined in the question]

Plugging these values into equation (ii):

P = 0.075 x 120

P = 9W

Hence, the electrical power received by your body is 9W

The mass of the block submerged in water measures 1.94 kg. We know the water's density to be 1 gm/cm³, with the initial scale reading at 19 N and a change in this reading amounting to 10 N. To determine the mass of the block when it is immersed in water, we apply the gravitational acceleration g, valued at 9.8.

Answer:

4.32 kg.m/s

Explanation:

The 2.4 kg stone moves at a speed of 3.6 m/s with an angle of 30 degrees from the x+ direction towards y+. The momentum's y-component is calculated by multiplying its mass with its velocity in the y-direction.