Answer:
109ohm
Explanation:
Note: when resistors are connected in series
Rt = R1 + R2 + R3 = 23+81+5 = 109ohm
Answer: the pair of sunglasses
Explanation:
A good pair of sunglasses are composed of abosorbent lenses that filter the sunlight that affects the eyes retina, especially ultraviolet (UV). So, these sunglasses are used to reduce the amount of light or radiant energy transmitted.
On the other hand, normal reading glasses (in which the lens glass has not been treated to filter ultraviolet sunlight) will let UV rays pass through.
Therefore, if both glasses are exposed to sunlight, the sunglasses are expected to be warmer by absorbing that radiant energy and preventing it from reaching the eyes.
Hand grip test an example of an isometric muscle contraction.
Isometric(increased pressure but no shortening)
Explanation:
- Isometric contraction, is one in which the muscle is activated, but instead of being allowed to lengthen or shorten, it is held at a constant length.
- An isometric exercise is a form of exercise involving the static contraction of a muscle without any visible movement in the angle of the joint.
- Isometric exercises are contractions of a particular muscle or group of muscles. During isometric exercises, the muscle doesn't noticeably change length and the affected joint doesn't move. Isometric exercises help maintain strength. They can also build strength, but not effectively.
- Isometric exercise is also known as static strength training. (Examples include the plank and side bridge as well as the wall sit and many yoga poses such as chair and tree poses).
Answer:
if the frequency is double, the wavelength is only half as long
Explanation:
Answer:
correct answer is option (A) 0.012 mol
Explanation:
Given:
Molar mass of the platinum, M = 195 g/mol
Mass of the platinum in the ring, m = 2.3 g
Now,
the number of moles (n) is calculated as :
thus,
on substituting the respective values in the formula, we get
or
n = 0.01179 mol ≈ 0.012 mol
Hence, the correct answer is option (A) 0.012 mol