Answer:
More than enough solar energy (8.2 million quad BTUs, 1 quad = 2.9 x1011 kWh) hits Earth's surface each year to meet all of societies' needs. Currently we use about 400 quads per year to run our society. Good building design allows passive use of sunlight to heat homes. Simple solar collectors are used to heat water and cook food. As useful as it is for these purposes, thermal energy from sunlight is still a low quality energy compared to electricity. Computers, most machinery, light bulbs, subway trains, and much more all require electricity. It is possible to turn thermal energy from the sun into electricity. In this unit we will examine how.
. We will also examine how to make electricity directly from light using the photovoltaic cells.
Answer:
Answer is when no single person in a group is being watched.
Refer below.
Explanation:
Social loafing is most likely to occur:
when no single person in a group is being watched.
Explanation:
It is given that,
Length of side of a square, l = 24 cm = 0.24 m
The uniform magnetic field makes an angle of 60° with the plane of the coil.
The magnetic field increases by 6.0 mT every 10 ms. We need to find the magnitude of the emf induced in the coil. The induced emf is given by :
is the rate of change if magnetic flux.
is the angle between the magnetic field and the normal to area vector.
or
EMF = 60 mT
So, the magnitude of emf induced in the coil is 60 mT. Hence, this is the required solution.
Answer:
61.803 Newtons
Explanation:
m = Mass of crate = 21 kg
= Coefficient of kinetic friction between the crate and the floor = 0.3
g = Acceleration due to gravity = 9.81 m/s²
Force
So, the magnitude of force must the worker apply is 61.803 Newtons
