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vesna_86 [32]
3 years ago
5

Which material is LEAST dense? zircon oxygen carbon disulfide air

Physics
1 answer:
Natalija [7]3 years ago
7 0

Answer:

Carbon disulfide soryy if im wrong\

Explanation:

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True or false: Ultimate tensile strength increases as the thickness of a solid material sample increases.
Varvara68 [4.7K]

Answer:

False.

Explanation:

Tensile strength should remain constant, regardless of thickness. For larger cross sections, it can slightly increase because the atoms in the center become more constricted and therefore less responsive to the applied stress.

7 0
3 years ago
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A bird has a kinetic energy of 3 J and a potential energy of 25 J. What is the mechanical energy of the bird?
Ahat [919]

Answer:

28 J

Explanation:

Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both.

In physics, mechanical energy (Emech) is the energy associated with the motion and position of an object usually in some force field.

Therefore:

ME = KE + PE = 25 + 3 = 28 J

8 0
3 years ago
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Someone please help me
bagirrra123 [75]
Oxygen. Plants need water sunlight and CO2 to make their food. They get the carbon and the energy from the CO2 and the sun, and they need water as well. Then they release oxygen
3 0
3 years ago
A 100-kg running back runs at 5 m/s into a stationary linebacker. It takes 0.5 s for the running back to be completely stopped.
Elza [17]

Answer:

1000 N

Explanation:

First, we need to find the deceleration of the running back, which is given by:

a=\frac{v-u}{t}

where

v = 0 is his final velocity

u = 5 m/s is his initial velocity

t = 0.5 s is the time taken

Substituting, we have

a=\frac{0-5 m/s}{0.5 s}=-10 m/s^2

And now we can calculate the force exerted on the running back, by using Newton's second law:

F=ma=(100 kg)(-10 m/s^2)=-1000 N

so, the magnitude of the force is 1000 N.

6 0
4 years ago
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How much work is done by a 120N force applied to a box that moves 5m?
Vsevolod [243]

Answer:

600 Joules

Explanation:

Using the formula F*d*cosФ. Assuming the Ф is parallel to the motion. The work done is 600 Joules.

4 0
3 years ago
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