PHYSICS HIGH SCHOOL

What is the measurement 111.009 mm rounded off to four significant digits?

Answers

Answer 1

Answer: 111.0 because 111.009 rounds off to 111.01, thus rounding again off to 111.0

Answer 2

Answer:

Answer:

It is b. 111.0 mm

Explanation:

Related Questions

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A force of 200 N is required to keep an object sliding at a constant speed of 2 m/s across a rough floor. How much power is being expended to maintain this motion?
The vapor pressure of ethanol is 1.00 × 102 mmHg at 34.90°C. What is its vapor pressure at 60.61°C? (ΔHvap for ethanol is 39.3 kJ/mol.) mmHg
A hair curling iron uses 13 watts of power. how long must it operate to do 1,040 joules of work?
Avg velocity definition | Problem Average velocity vectors… show how fast something is going at a given instant. show the average speed of something. point in the same direction as the change in position. require knowing the initial and final position, along with the elapsed time. are everything you need to determine the displacement of something.

The index of refraction for red light in material X is measured at 1.80. Blue light travels 5 × 10⁶ m/s slower than red light in this material. What is the index of refraction for blue light in material X?

Answers

The refractive index (n) of a material is defined as the ratio of the speed of light in a vacuum © to the speed of light in that material (v). Therefore, we can calculate the speed of light in material X for red light as v_red = c / n_red = c / 1.80. Similarly, the speed of light in material X for blue light can be calculated as v_blue = c / n_blue, where n_blue is the refractive index for blue light in material X.

We are given that blue light travels 5 × 10⁶ m/s slower than red light in this material. Therefore, we can write:

v_blue = v_red - 5 × 10⁶ m/s

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Substituting the expressions for v_red and v_blue, we get:

c / n_blue = c / 1.80 - 5 × 10⁶ m/s

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Solving for n_blue, we get:

n_blue = c / (c / 1.80 - 5 × 10⁶ m/s) ≈ 1.81

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Therefore, the refractive index for blue light in material X is approximately 1.81 123.

In a machine shop, a hydraulic lift is used to raise heavy equipment for repairs. The system has a small piston with a cross-sectional area of 0.075 m2 and a large piston with a cross-sectional area of 0.237 m2 . An engine weighing 3400 N rests on the large piston. What force must be applied to the small piston in order to lift the engine? Answer in units of N.

Answers

Answer:

$F_s=1075.9493\ N$

Explanation:

Given:

area of piston on the smaller side of hydraulic lift, $a_s=0.075\ m^2$

area of piston on the larger side of hydraulic lift, $a_l=0.237\ m^2$

Weight of the engine on the larger side, $W_l=3400\ N$

Now, using Pascal's law which state that the pressure change in at any point in a confined continuum of an incompressible fluid is transmitted throughout the fluid at its each point.

$P_s=P_l$

$(F_s)/(a_s)=(W_l)/(a_l)$

$(F_s)/(0.075) =(3400)/(0.237)$

$F_s=1075.9493\ N$ is the required effort force.

Answer:

F = 1076 N

Explanation:

given,

small piston area, a = 0.075 m²

large piston area, A = 0.237 m²

weight on the large piston, W = 3400 N

force applied on the second piston, F = ?

using pascal law for the force calculation

$(F)/(W)=(a)/(A)$

$(F)/(3400)=(0.075)/(0.237)$

F = 0.3165 x 3400

F = 1076 N

The force applied to the small piston in order to lift the engine is equal to 1076 N.

The copper wire and bulb is connected in a series with 220 V electric supply. Why only an electric bulb glows where as the copper wire remains the same.Give REASON to support the answer.

Answers

-- In a series circuit, the current ( I ) is the same at every point.

-- The power dissipated by any section of the circuit is I² x Resistance.

-- The wire has very low resistance, so I²R is very low dissipated power.

-- The filament in the bulb has most all of the resistance in the circuit,
so it dissipates virtually all the power of the circuit, and certainly much
more than the wires do.

The method of heat transfer by which the sun warms the earth isA) conduction
B) convection
C) radiation
D) solaration

Answers

the heat transfer by the sun that warms the earth is called radiation.

Find initial velocity and time in air

Answers

Answer:

The answer to your question is: v = 121.46 m/s

Explanation:

Data

h = 30 m

vo = ?

dx = 300 m

Formula

t = $\sqrt{(2h)/(g)}$

speed = distance / time

Process

$t = \sqrt{(2(30))/(9.81)} \n$

t= 2.47 s

speed = 300 / 2.47

speed = v = 121.46 m/s

Suppose for your cookout you need to make 100 hamburgers. You knoe that 2.00 pounds will make 9 hamburgers. How many pounds will u need?

Answers

The cook needs to make 100 hamburgers. The price of 9 hamburgers is 2 pounds. Then 22.2 pounds are needed to bring 100 hamburgers.

What are methods of finding price values ?

There are simple mathematics to find the price of a material based on the data we have on it. For example if we know the price of one unit of that material then multiply the price by the number of units we want to buy.

If know the price of a bulk or certain number of materials, then find the price of one material from it.

Here, the price of 9 hamburgers is given 2 pound. Then, the price of one hamburger is :

2/9 = 0.22.

Now, multiply the value of one hamburger with the number that we want. We want 100 hamburgers. Then,

100× 0.22 = 22.2 pounds.

Therefore, 22.2 pounds are needed for 100 hamburgers.

Find more on hamburgers:

brainly.com/question/13198246

#SPJ2

if
2.0 pound will make 9 hamburgers
so 100 hamburgers will make by pounds = 100/9 × 2.0 = 22.2 pounds

the ans is (22.22 pounds will make 100 hamburgers)

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