Which of the following instruments is used to measure air pressure? A. Thermometer
B. Barometer
C. Hygrometer
D. Anemometer

Answers

Answer 1

Answer: The barometer is used to measure air pressure.

Answer: Barometer

Answer 2

Answer: A barometer measures air pressure

The first barometer was invented in the early 1600. The first barometer had mercury in a small basin with an upside down glass tube placed in the mercry.

Related Questions

Which list of elements contains a metal, a metalloid, a nonmetal, and a noble gas?(1) Be, Si, Cl, Kr (3) K, Fe, B, F(2) C, N, Ne, Ar (4) Na, Zn, As, Sb
An atom with an equal number of electrons and protons has no _________.A. reactivity B. weight C. charge
Calculate the decrease in temperarure when 2.00 L at 20.0 degrees celsius is compressed to 1.00 L.
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H2SO3 Spell out the full name of the compound.

In a nuclear reaction, the energy released is equal to 8.1 x 1016 joules. Calculate the mass lost in this reaction. (1 J = 1 kg m2/s2) and the speed of light = 3.00 × 10^8 m/s ]Answer

7.2 x 1032 kg

2.7 x 108 kg

9.0 x 10-1 kg

7.2 x 10-16 kg

Answers

use the formula E=mc^2
energy given=8.1 x 10^16 joules
speed of light = 3.00 × 10^8 m/s

plug in the values we'll get mass=9.0 x 10-1 kg

Answer : The mass lost in this reaction will be, $9.0* 10^(-1)Kg$

Explanation :

According to the Einstein equation, the energy is equal to the product of mass and the square of the speed of light.

The mathematical expression is :

$E=m* c^2$

where,

E = energy released = $8.1* 10^(16)J$

c = speed of light = $3* 10^8m/s$

m = mass lost = ?

Now put all the given values in the above formula, we get the mass lost in the reaction.

$8.1* 10^(16)J=m* (3* 10^8m/s)^2$

$8.1* 10^(16)Kg.m^2/s^2=m* (3* 10^8m/s)^2$

$m=9.0* 10^(-1)Kg$

Therefore, the mass lost in this reaction will be, $9.0* 10^(-1)Kg$

The_____is an organelle that can give instructions for a
cell to reproduce and send directions to organelles to make needed
materials.

Answers

Answer:

nnmnm

Explanation:

Trends in the periodic table indicate that the element with the greatest ionization energy is in which of the following periods and groups?a
Period 2, Group 1
b
Period 7, Group 2
c
Period 6, Group 17
d
Period 1, Group 18

Answers

Answer:

D Period 1, Group 18

Explanation:

it's helium

it's top right corner of the periodic table

In which chemical reaction will the heat content of the reactants be more than that of the products?

Answers

When the heat content of the reactants be more than that of the products, this reaction is most likely is an endothermic reaction. This type of reaction is characterized by the absorbing heat into the system or the addition of energy into the system for the reaction to occur.

Exothermic. On Plato it will be answer D.

The half-life of a radioactive isotope is 20.0 minutes. What is the total amount of a 1.00-gram sample of this sample of this isotope remaining after 1.00 hour?

Answers

The amount remaining is obtained using the half life data. The total amount remaining after one hour is equal to 1/( e^ (ln2/(20/60))*1). The final answer is 0.125 grams.

Answer: 0.125 grams

Explanation:

Radioactive decay follows first order kinetics.

Half-life of give isotope = 20 minutes

$\lambda =\frac{0.693}{t_{(1)/(2)}}=(0.693)/(20)=0.03465min^(-1)$