Answer:
0.4386
Explanation:
<em>The density of an object is calculated as the ratio of its mass and that of its volume. This can be expressed mathematically as;</em>
Density = mass/volume
In this case:
density of lead = 1140 kg/m3
mass of the lead = 500 kg
From the equation above;
volume of the lead = mass/density
= 500/1140
= 0.4386
<em>Hence, the volume of 500 kg of lead with a density of 1140 kg/m^3 is </em><em>0.4386 </em><em>.</em>
T he role of oxygen in air supply is to keep all the ling beings live and healthy.
<h3>What is Oxygen?</h3>
Oxygen is the most important gas required for the living of human beings, animals, birds and the whole ecosystem.
Oxygen is fundamental for breath on the grounds that the body utilizes it to 'consume' food atoms. Creatures take in oxygen while breathing in and radiate carbon dioxide while breathing out. Oxygen makes up practically 21% of the all out gases in air, with the majority of the excess gas being physiologically latent nitrogen.
Oxygen assumes a basic part in breath, the energy-delivering science that drives the digestion systems of most living things. We people, alongside numerous different animals, need oxygen in the air we inhale to remain alive. Oxygen is created during photosynthesis by plants and many sorts of organisms.
Thus, the air supply needs oxygen on the majority.
Learn more about oxygen.
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Answer: Boyle found that when the pressure of a gas at a constant temperature is increased, the volume of the gas decreases. When the pressure of a gas is decreased, the volume increases. This relationship between pressure and volume it's called Boyle's law.
Explanation: In the 1600s, Boyle measured the volumes of gases at different pressures. Boyle found that when the pressure of a gas at a constant temperature is increased, the volume of the gas decreases. When the pressure of a gas is decreased, the volume increases. This relationship between pressure and volume it's called Boyle's law.
The Initial height of the tire will be 0.32 m
<u>Explanation:</u>
<u>We have the formula,</u>
h=Vf^2/2g
h=V×f×f/2g
where Vf denotes the speed of the tire at the bottom of the swing
where g denotes the acceleration
due to the gravity
h=2.5×2.5=6.25
2×9.8 =19.8
h=6.25/19.8
h=0.32
The Initial height of the tire will be 0.32 m
Answer:
Pushing a box with 100 newtons of force for 15 meters does more work.
Explanation:
Given,
The force for pushing a box for 5 meters, f = 200 N
The force for pushing a box for 15 meters, f = 100 N
The work done on a box is equal to the product of the magnitude of the force 'F' applied and the magnitude of displacement 'S' caused on the box.
The formula for work is
W = F · S joules
Substituting the above equation for f
W = 200 N x 5 m
= 1000 J
Substituting the for F
W = 100 N x 15 m
= 1500 J
Hence, from the above results pushing a box with 100 newtons of force for 15 meters does more work.