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Paul [167]
3 years ago
11

A calorimeter contains 195 g of water at 20.4 º C. A 37.8 g sample of an unknown metal is heated to 133 º C and placed into the

water in the calorimeter. The final temperature of the metal and the water are 24.6 º C. What is the specific heat of the metal?
Physics
1 answer:
sweet-ann [11.9K]3 years ago
6 0

Answer:

24.6 degrees celsius

Explanation:

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Resolving power of a telescope whose objective lens has diameter 1.22m for a wavelength 4000 Å.​
Mamont248 [21]

\sf \huge \purple{ Answer : - }

Diameter of objective lens = 1.22m

Wavelength of light = 4000Å

We have to find resolving power of telescope ..

★ Resolving power of telescope is given by

RP = D/1.22λ

  • D denotes diameter of lens
  • λ denotes wavelength of light

RP = D/1.22λ

RP = (1.22×10⁷)/(1.22×4)

RP = 0.25 × 10⁷

RP = 2.5 × 10⁶

★ Resolving power of microscope is given by

RP = 2μsinθ/λ

5 0
3 years ago
Why do cats have tails?
tester [92]
Cats have tails to help their balance. Similar to the stick a trapeze/high wire walker uses.

The tail helps to serve as a counterbalance when cats walk on narrow spaces such as fences or shelves. The tail also aids in balance when a cat is running after or jumping on prey.

Just so you know....Cats can live without tails.
3 0
3 years ago
A mosquito of mass 0.15 mg is found to be flying at a speed of 50 cm/s with an uncertainty of 0.5 mm/s. (a) How precisely may it
amid [387]

Answer:

a) Δx = t 0.05 + 0.5

,  Δx = 0.5 cm, b)  Do not present any problem

Explanation:

The kinematic equation for constant speed is

          v = x / t

          x = v t

a) the uncertainty can be calculated with

          Δx = dx /dv Δv + dx /dt Δt

          Δx = t Δv + v Δt

Speed ​​is

         v = (50.00 ± 0.05) cm / s

     

The most common uncertainty for the time of Δt = 0.01 s

    We replace

           Δx = t 0.05 + 50 0.01

           Δx = t 0.05 + 0.5

We must know the time to have an explicit value, if we assume that the measure was t = 1s

           Δx = 0.5 cm

b)

Do not present any problem since its value is not very small, we must take as soon as the quantum effects and the velocity are not so high that we must take into account the relativistic effects

5 0
3 years ago
A women who normally weighs 400 N stands on top of a ladder so high she is one full additional earth radius above the surface of
AveGali [126]

The woman weighs 100N now.

Explanation:

Given:

F is given as 400N

one full additional earth radius formed

To Find:

Weight of the woman=?

Solution:

We know that gravitational force is inversely proportional to the square of radius.

f_g=\frac{1}{r^2}

where

f_g is the gravitational force

r^2 is the radius square

So when radius is doubled, the force becomes one fourth of the original.

Therefore \frac{1}{4} \times400 = 100N

3 0
3 years ago
Can a apple fall from a tree and not break open?
Feliz [49]

Well as you've seen before most likely, an apple can fall right off a tree, and stay perfectly fine. its all dependent on the variables. What angle is the apple falling at? Whats the speed, height, even the size of the apple? We must take into aware anything can happen, but its all behind the variables.

Brainliest if helpful

P.S Fact Check with the second person who just answered

6 0
3 years ago
Read 2 more answers
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