<h3>Answer</h3>
Tools that magnify objects Tools that don't magnify objects
magnifying glass rule
telescope binoculars
microscope
<h3>Explanation</h3>
radio dish: is use to receive radio waves from the air.
binoculars: provide a magnified stereoscopic view of distant objects.
streak plate: is a technique which is used to grow bacteria on a growth media surface so that individual bacterial colonies are isolated and sampled.
wind vane: is used to determine wind direction.
ruler: is used for measuring a line.
microscope: is used to magnify the objects which are not visible by naked eyes.
magnifying glass: is used to magnifying tiny objects which are difficult to see yet they are visible.
telescope: use by space scientist to examine astronomical event that may take place in the sky which is too far.
Answer: B
Explanation: Hemoglobin is a protein in red blood cells that acts as the vehicle for oxygen and carbon dioxide from the lungs to tissues and vice-versa.
What is considered normal Hemoglobin levels vary throughout one's life, from childhood to adult life and in older adults. It even varies between women and men. In women, it also varies depending on whether they are pregnant or not.
When hemoglobin does become less than normal, it results in anemia, a condition accompanied by fatigue. Because the athlete does not have this symptom, he is not suffering from anemia, and so there is no cause for concern. Although the athlete's hemoglobin level has reduced, the absence of fatigue indicates that it is not lower than normal.
Answer
given,
constant speed of cart on right side = 2 m/s
diameter of nozzle = 50 mm = 0.05 m
discharge flow through nozzle = 0.04 m³
One-fourth of the discharge flows down the incline
three-fourths flows up the incline
Power = ?
Normal force i.e. Fn acting on the cart
v is the velocity of jet
Q = A V
v = 20.37 m/s
u be the speed of cart assuming it to be u = 2 m/s
angle angle of inclination be 60°
now,
F n = 2295 N
now force along x direction
Power of the cart
P = F x v
P = 1987.52 x 20.37
P = 40485 watt
P = 40.5 kW
Explanation:
Heat liberated by a body depends on the mass of the body, the specific heat capacity of that body and the change in temperature experienced by the body.
Heat energy by a body depends on the surface area of the body A as well as the temperature of body T.
According to Stefan's law, rate of heat energy radiated by a body is given by P=σAeT^4
Thus more is the temperature of body, more is the heat radiated. Also mores is the surface area of body, more is the heat radiated.
