A rolling ball has 18 joules of kinetic energy and is rolling 3 m/s find its mass
Isotopes of the same element vary in the number of ____ present in the nucleus A.neutrons B.protons
Isotopes of the same element vary in the number of neutrons present in the nucleus. Thus, the correct option for this question is A.What is an isotope?
An isotope may be defined as atoms with the same number of protons but different numbers of neutrons. They share almost the same chemical properties, but differ in mass and therefore in physical properties. It is a variation of an element that possesses the same atomic number but a different mass number.
According to the question, the elements of carbon-12, carbon-13, and carbon-14 are three isotopes of the element carbon that has mass numbers 12, 13, and 14 respectively.
This means that an atom has the same atomic number but a different mass number. This is better understood by the fact that the number of protons governs the atomic number.
Therefore, isotopes of the same element vary in the number of neutrons present in the nucleus. Thus, the correct option for this question is A.
To learn more about Isotopes, refer to the link:
At room temperature of the 92 naturally occurring elements, state the number that are: a. Solid
A satellite of mass m is in a circular orbit of radius R2 around a spherical planet of radius R1 made of a material with density rho. ( R2 is measured from the center of the planet, not its surface.) Use G for the universal gravitational constant.
Answer: The gravitational force Fg exerted on the orbit by the planet is Fg = G 4/3πr3rhom/ (R1 + d+ R2)^2
Gravitational Force Fg = GMm/r2----1
Where G is gravitational constant
M Mass of the planet, m mass of the orbit and r is the distance between the masses.
Since the circular orbit move around the planet, it means they do not touch each other.
The distance between two points on the circumference of the two massesb is given by d, while the distance from the radius of each mass to the circumferences are R1 and R2 from the question.
Total distance r= (R1 + d + R2)^2---2
Recall, density rho =
Mass M/Volume V
Hence, mass of planet = rho × V
But volume of a sphere is 4/3πr3
Mass M of planet = rho × 4/3πr3
=4/3πr3rho in kg
From equation 1 and 2
Fg = G 4/3πr3rhom/ (R1 + d+ R2)^2
What kind of friction is shown between the skydiver and the air?
Fluid friction is the kind of friction between the skydiver and the air.Explanation:
Objects moving through fluid experience fluid friction or drag. A skydiver diving in air is an example of fluid friction since air as a medium is fluid and thus air molecules resists the falling motion of a body. Weight of the object due to gravity decides the acceleration of a skydiver when in flight and the resisting frictional force (drag), opposes it.
So, a resultant force acts and his velocity increases proportionally at first and then becomes a constant terminal value. The extent of fluid friction is dependent on the size of body as well as its speed. Larger the size more is the friction; higher the speed more is the friction.
Which of the following is an obstacle to creating computer-based models for tracking a hurricane? 1. Hurricanes form over water, where it is difficult to observe them.
2. Most sources of data about hurricanes are anecdotal and unreliable.
3. Forecasters must consider a large number of variables that affect the path of the storm.
4. all of the above
4. All of the above I think, not to sure about 1. but the rest are right so im like 90.99999 percent sure good luck
Fill in the blank. ____ energy is energy stored due to the position of an object.
C. Thermal Expansion
D. Gravitational potential
The Geologic Time Scale begins at the formation of Earth approximately _____ years ago.
I need help setting this problem up. Please help! A mother pushes a stroller up a hill, with the center of the stroller 1 meter ahead of her body. She maintains contact with the stroller at all times. Her position is x(t), speed is v(t) and her acceleration is a(t). What are the position, velocity, and acceleration of the stroller at any time t?