PHYSICS HIGH SCHOOL

The main reason ice blocks became unpopular for cooling food was

Answers

Answer 1

Answer: The source of the ice was unsanitary

Answer 2

Answer:

Answer:

The source of ice was unsanitary :>

Explanation:

Related Questions

Which of the following is the best example of a proper hypothesis? Orange popsicles taste sweeter than grape popsicles. If two objects are dropped at the same height, the heavier object will hit the ground first. Children who wear backpacks do better academically. I think there is no effect on hearing if you listen to loud music only three hours a day.
Plz I need the answer quick!!!What is the definition of law of conservation of energy
An object thst is in free fall seems to be what
Solar energy advantages and disadvantages
Osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane. Osmotic pressure is created by the presence in a fluid of small diffusible molecules that easily move through the capillary membrane. True False

Which types of radioactive decay cause the parent nucleus to become a different element or isotope (and thus are useful for radioactive dating)? Group of answer choices Alpha decay Beta decay Gamma decay Both alpha and beta decay Both beta and gamma decay All three: alpha, beta, and gamma decay

Answers

Answer: alpha decay and beta decay cause the parent nucleus to become a different element.

Explanation:

Alpha decay : It is a radioactive decay in which nucleus emits an alpha particle and turns into different atomic nucleus. During alpha decay, an atom loses 2 protons and 2 neutrons.

$_Z^A\textrm{X}\rightarrow _(Z-2)^(A-4)\textrm{Y}+_2^4\alpha$

Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron.Thus a different element is produced.

$_Z^A\textrm{X}\rightarrow _(Z+1)^A\textrm{Y}+_(-1)^0\beta$

Gamma decay : In this process, the unstable nuclei transformed into stable nuclei by releasing gamma rays along with beta or alpha decay.The same element is produced.

$_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma$

Artists Michaelangelo, Raphael, and Leonardo da Vinci belong to which period of the Renaissance?a. Early Renaissance
b. High Renaissance
c. Late Renaissance

Answers

Answer:

The correct answer is option B, High Renaissance

Explanation:

The high renaissance period is the first half of the 16th century which marked its beginning from 1490s and ended by late 15th century. Some of the best known artist of this period were Michelangelo, Raphael, Bramante, Leonardo da Vinci etc. The period of existence of these artist was

a) Leobardo Da Vinci - 1452-1519

b) Michelangelo - 1475-1564

c) Raphael – 1483 -1520

Answer:

The correct answer is option B, High Renaissance

Explanation:

A 20 kg box moving at an initial speed of 10 m/s slides 25 m to the right on a horizontal floor before it comes to a complete stop. What is the coefficient of friction between the box and the floor?

Answers

The coefficient of friction between the 20 kg box and the floor is 0.2

We'll begin by calculating the acceleration of the box. This can be obtained as follow:

Initial velocity (u) = 10 m/s

Final velocity (v) = 0 m/s

Distance (s) = 25 m

Acceleration (a) =?

v² = u² + 2as

0² = 10² + (2 × a × 25)

0 = 100 + 50a

Collect like terms

0 – 100 = 50a

–100 = 50a

Divide both side by 50

a = –2 m/s²

Finally, we shall determine the coefficient of friction. This can be obtained as follow:

Mass (m) = 20 Kg

Acceleration (a) = –2 m/s²

Acceleration due to gravity (g) = 10 m/s²

Frictional Force (F) = –ma = – (20 × –2) = 40 N

Normal reaction (N) = mg = 20 × 10 = 200 N

Coefficient of friction (μ) =?

$\mu = (F)/(N) \n\n\mu = (40)/(200)\n\n$

μ = 0.2

Therefore, the coefficient of friction between the box and the floor is 0.2

Learn more: brainly.com/question/11902512

The coefficient of friction between the box and the floor is 0.204.

Given data:

The mass of box is, m = 20 kg.

The initial speed of box is, u = 10 m/s.

The sliding distance is, s = 25 m.

The linear force acting on the fox is providing it necessary friction. Then,

$F = -F_(f)\nma = -\mu mg\na= -\mu * g$

Here, a is the linear acceleration and $\mu$ is the coefficient of friction between the box and the floor.

Applying the third kinematic equation of motion as,

$v^(2)=u^(2)+2as\n0=10^(2)+2(a)* 25\na = (-100)/(50)\na =- 2\;\rm m/s^(2)$

Then,

$a=- \mu * g\n-2= -\mu * 9.8\n\mu = 0.204$

Thus, we can conclude that the coefficient of friction between the box and the floor is 0.204.

Learn more about frictional force here:

brainly.com/question/23575742?referrer=searchResults

An experiment measures the breaking point of identical strips of wood made from different trees. The procedure must contain which of the following instructions?

Answers

The procedure must contain : performing the experiment in a safe manner

Whatever your experiment maybe, the full steps to avoid any casualties and make the experiment as safe as possible should be included in the procedure/ instructions.

hope this helps

Answer:

the correct answer is a

Explanation:

performing the experiment in a

safe manner

The atomic mass of an element is A. twice the number of protons in one atom of the element. B. the sum of the protons and neutrons in one atom of the element. C. a weighted average of the masses of an element’s isotopes. D. a ratio based on the mass of a carbon-12 atom.

Answers

b. the sum of the protons and the neutrons in one atom of the element

Answer:

the answer is b

Explanation:

the ratio of the length of an airplane wing to its width is 8 to 1. find the length of wing is 29.8 meters, how wide must it be?

Answers

The width must be 1/8th the length.
29.8/8 = 3.725m

Other Questions

Must be 8 letters (Dimensional Analysis escape room)

Which of the following could classify as a non-essential need according to the hierarchy of needs? A. healthy food B. human contact C. more sleep D. new clothes

A passenger on a boat moving at 1.70 m/s on a still lake walks up a flight of stairs at a speed of 0.60 m/s , as shown in the figure . The stairs areangled at 45o pointing in the direction of motion as shown. Write the vector velocity of the passenger relative to the water. Express your answer using two significant figures. Express your answer in terms of the unit vectors i and j.

A small piece of Styrofoam packing material is dropped from a height of 1.90 m above the ground. Until it reaches terminal speed, the magnitude of its acceleration is given by a = g − Bv. After falling 0.400 m, the Styrofoam effectively reaches terminal speed, and then takes 5.40 s more to reach the ground.(a) What is the value of the constant B?s-1(b) What is the acceleration at t = 0?m/s2 (down)(c) What is the acceleration when the speed is 0.150 m/s?m/s2 (down)