When a space shuttle was launched, the astronauts aboard experienced and acceleration of 29.0 m/s. If one of the astronauts had a mass of 69.0 kg, what net force in newtons did the astronaut experience?
Answers
Net force = (mass) · (acceleration)
= (69 kg) · (29 m/s²)
= (69 · 29) · (kg·m/s²)
= 2,001 Newtons upward
(about 450 pounds)
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The number of protons always equals the number of neutrons in all isotopes.
B.
The number of protons never equals the number of neutrons in an isotope.
C.
Different isotopes for the same element will always have the same numbers of neutrons.
D.
Different isotopes for the same element always have the same number of protons.
Answers
Answer:
D. different isotopes for the same element will always have the same numbers of neutrons.
Explanation:
An isotope is the different variant of an element that has different number of neutron. There are various elements found in nature that have different isotopes.
Number of neutrons present in atom is different for the same element which makes the mass of one isotope different from the another.
Example of such isotope : Isotope of hydrogen are Protium, Deuterium and Tritium.
Final answer:
Different isotopes for the same element will always have the same numbers of neutrons.
Explanation:
The correct statement about isotopes is C. Different isotopes for the same element will always have the same numbers of neutrons. Isotopes are variants of an element that have the same number of protons but different numbers of neutrons. The number of protons in an element determines its atomic number, whereas the sum of protons and neutrons determines its atomic mass. So, while isotopes of the same element have the same number of protons, they can have different numbers of neutrons.
Learn more about Isotopes here:
#SPJ6
Answers
Considering the definition of density, the density of the old coin is 8.92 .
It is neccesary to know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, Density is a quantity that allows us to measure the amount of mass in a certain volume of a substance, that is, density is the relationship between the mass of a substance and the volume it occupies.
Mathematically, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
In this case, you know:
- mass= 26.76 g
- volume= 3 cm³
Replacing in the definition of density:
Solving:
density= 8.92
The density of the old coin is 8.92 .
Learn more about density:
Density = mass/volume
26.76/3 = 8.92
The density is 8.92
Answers
Answer:
Explanation:
The acceleration of an object is the rate of change of velocity of the object; it is given by:
where
u is the initial velocity of the body
v is its final velocity
t is the time elapsed
In this problem, we have:
u = 5.0 m/s is the initial velocity of the skater
v = 10.0 m/s is the final velocity
t = 5 s is the time elapsed
Therefore, the acceleration of the skater is:
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Answers