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2 years ago

What is the defining feature of isotopes of the same element?

1 answer:

6 0

Answer: Isotopes. An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.

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4. If the velocity of the particles is high, they will collide with each other with less force.

tresset_1 [31]

Answer:

7657

Explanation:

3 0

3 years ago

Use Hooke's Law to determine the variable force in the spring problem. A force of 450 newtons stretches a spring 30 centimeters.

ladessa [460]

Answer:

Work Done = 67.5 J

Explanation:

First we find the value of spring constant (k) using Hooke's Law. Hooke's is formulated as:

F = kx

where,

F = Force Applied = 450 N

k = Spring Constant = ?

x = Stretched Length = 30 cm = 0.3 m

Therefore,

450 N = k(0.3 m)

k = 450 N/0.3 m

k = 1500 N/m

Now, the formula for the work done in stretching the spring is given as:

W = (1/2)kx²

Where,

W = Work done = ?

k = 1500 N/m

x = 70 cm - 40 cm = 0.3 m

Therefore,

W = (1/2)(1500 N/m)(0.3 m)²

3 0

3 years ago

A rocket travels from the moon to earth, describe how its weight changes during the journey.

Vladimir79 [104]

Answer:

It has to overcome earth's gravity and have enough fuel to land on the moon at a slow enough speed

7 0

3 years ago

What is the chemical formula for Tetrasulfur pentoxide <br>( explain)<br>

juin [17]

Answer:

s4n4 the chemical formula

6 0

3 years ago

Joel has a mass of 50kg he is spending his firs day on skis. His friend is trying to push him across a level patch of snow. Joel

insens350 [35]

Joel does not move because the frictional force acting on him is also 60 N

Explanation:

The force of static friction is a force that acts on objects at rest, in the direction opposite to the force that is trying to put the object in motion.

The value of the force of static friction goes from zero to a maximum value given by

$F_f = \mu_s mg$

where

$\mu_s$ is the coefficient of static friction

m is the mass of the object

g is the acceleration of gravity

In order to move the object, the force which is pushing it must overcome this maximujm value of the force of friction, otherwise the force of friction will balance the pushing object preventing the object to move.

In this problem, there are two forces acting on Joel:

- The pushing force, $F=60 N$ , forward