Scientist judge each others work based mostly on how creative it is.
Explanation:
Correct. Air has an index of refraction of approximately 1, and the angle of incidence is 35°. The substance has an unknown index of refraction n, and the angle of refraction is 25°.
1 sin 35° = n sin 25°
n = 1.36
Answer:
Answer
Explanation:
The followings are the reasons for the reduction in the death toll from Tornadoes occurence in the 2000s compared to 1950s;
(a) Improvement in technology and rapid natural occurence prediction. Through the use of advanced radar systems the early detection of natural occurence e.g tornadoes, providing warning signal to the residents and tracking their possible pathways is made possible.
Fast spread of information through television channels, Radio, Social media etc., help in fast spreading of information, thereby sending early signals to people thus making them prepare for its occurence.
Improvement of protective measures, provision of housing infrastructure for the displaced. With increase in technology, the protective measures are also improving.
Quick Government and medical interventions for casualties. Conducting Tornado drills help people to practice to take cover in a specified location during tornadoes.
TV meteorologist are able to inform viewers of the approaching tornadoes and hurricanes which can be tracked from the time of its origin i.e., from a depression to a storm. Advanced radar data help in delineating the possible pathways of the hurricane.
Tornadoes on the other hand form in a thunderstorm or during a frontal activity. In thunderstorms there are vortices formed which are pre-cursors of tornadoes.. A vortice when touches the ground forms a tornado. Once a tornado is on the ground it becomes easy for radars to measure windpeeds. Hence a TV meteorologist can report the intensity of the Tornado.
Answer:
The product of mass times velocity for both objects is the same.
Explanation:
They both have the same velocity. False
They both have the same mass. False: Because two objects of different masses can have the same momentum. The least massive of the two objects will have the greatest kinetic energy.
The product of mass times velocity for both objects is the same. True: Same momentum means that the large mass must have a small velocity; therefore, their product is equal to the small mass times a large velocity.
Mass and velocity is the same for both. False: Based on what was stated for the second option.
Answer
Given,
Charge, q = 70 A.h
Potential difference, V = 25 V
a) Charge, q = ?
we know that
q= I t
= 70 A.h
= 70 x 60 x 60 A.s
= 252,000 C
b) Potential energy of the charge
U = q V
U = 252,000 x 25
U = 6,300,000 J