Answer: Physical, chemical and biological laws today operated in the geological past.
Explanation:
Answer:
Explanation:
<em><u>Considering the density & specific heat capacity of coffee to be equal to that of water.</u></em>
<em><u>GIVEN:</u></em>
- density
- specific heat
- mass of coffee,
- initial temperature of coffee,
- final temperature of coffee,
- power rating of oven,
- time taken to reach the final temperature,
<u>Heat released by the coffee to come to 60°C:</u>
\ J[/tex]
<u>Now the energy used by the oven in the given time:</u>
Now the efficiency:
Answer:
Part b)
Part c)
Explanation:
The two components of the velocity of the ball is given as
Part a)
now we know that the displacement in y direction is given as
so we have
Part b)
Distance of the ball in x direction of the motion is given as
Part c)
In x direction the velocity will remain the same always
while in Y direction we can use kinematics
Answer:
Ep = 6300 [J]
Explanation:
If the ground level is taken as the reference energy point, that is, as the point at which the potential energy is equal to zero. We can calculate the energy potential maxima to the height where the weather vane is located.
The mass can be calculated as follows:
w = m*g
m = w /g
m = 140 / 9.81
m = 14.27[kg]
Now calculating the potential energy
Answer: How are nuclear reactions used to meet the world's energy needs? Both fusion and fission are used to generate electricity, but more fission reactors than fusion reactors are in use. ... Both fusion and fission are used to generate electricity, but more fusion reactors than fission reactors are in use.
Explanation: