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Ina R

Numerade Educator

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Educator Statistics

Numerade tutor for 5 years
144 Students Helped

Ina's Quick Ask Videos

04:52
Biology

Explain the difference between natural and artificial
immunity.
2. Explain the difference between active and passive
immunity.
Are these immediate or delayed? Do they give memory?
3. Give examples of all 4 combinations: natural active, natural
passive, artificial active and artificial passive.
02:48
Biology

Cellular respiration:
Which carbohydrate yeast will ferment the fastest and why?
(glucose, sucrose, starch, and a fake sweetener.)
which carbohydrate will have the slowest rate of gas production,
why would that be.
what would be the purpose of only using water as a solution in
an experiment like this?
01:19
Physics 101 Mechanics

How much force must be produced by the biceps brachii, attaching
at 90 degrees to the radius at 3 cm from the center of rotation at
the elbow joint, to support a weight of 85 N? Assume the limb
weighs 40 N and its center of mass is 13 cm from the elbow.
03:05
Physics 101 Mechanics

The bottom of a flat-bottomed aluminum boat has an area of 4 m^2 and the boat's mass is 60 kg. When set afloat in water, how far below the water surface is the boat bottom?
04:50
Physics 101 Mechanics

2) A hot-air balloon can carry mass equal to the difference between the mass of air displaced by the balloon and the mass of the gas inside the balloon. A scientist wants to investigate mass lifting using a spherical balloon, 4.00 m in diameter, filled with heated air at 70°C in Kapadokya. The air temperature and atmospheric pressure at Kapadokya are 25°C and 755 torr. The pressure in the balloon is also equal to the atmospheric pressure.
(a) What total mass can the balloon lift? Assume that the average molar mass of air is 29.0 g/mol. (Hint: Heated air is less dense than cool air.)
(b) If the balloon is filled with enough helium (4.003 g/mol) at 25°C and 755 torr to achieve the same volume as in part a, what total mass can the balloon lift?
01:39
Physics 101 Mechanics

If the value of the x-component of a vector is positive (+) and the value of the y-component is negative, then the vector will be in which quadrant?
a. Vector will be in the first quadrant.
b. Vector will be in the fourth quadrant.
c. Vector will be in the third quadrant.
d. Vector will be in the second quadrant.
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