To calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.20 above the ground we can get the root of the quad equation for time are t=-0.24 or t =1.84 taking the t = 1.84, so the equation will be:
x = 15.6cos(30) * 1.86, x = 24.79m
Efficiency is defined as the measure of the amount of work or energy is conserved in a certain process. At all times, in every process, work or energy is always lost or wasted due to certain interference. Not all work given is converted to useful work or energy. Thus , efficiency is calculated by dividing the energy or work output to the energy or work input then the value is multiplied by 100 to express efficiency as percentage.
Efficiency = work output / work input
Efficiency = (1020 J / 1200 J) = 85%
Answer:
0.9972 fraction of plutonium will remain after 100 years.
Explanation:
Half life of plutonium = 
Let the initial mass of plutonium be = 
Mass of plutonium after time of 100 years = A
Decay constant for this process = 
0.9972 × 100 = 99.72 %
0.9972 fraction of plutonium will remain after 100 years.
The right answer for the question that is being asked and shown above is that: "B) Earth's temperature has not changed over time." Scientists have observed that the average sunspots have increased in the last 50 years. The statement that best describes an effect of this increase in sunspots <span>Earth's temperature has not changed over time. </span>
Question 1: The block in the illustration is floating in water, which has a density of 1.0 g/cm^3. About 40% of the block is below water. Even though we can't see the illustration, we estimate the density of the block to be about 0.40 g/cm
³ .
Question 2: The upward force that makes things float is called buoyancy.
Question 3: According to Pascal's principle, pressure through a fluid is uniform.
Question 4: A wing achieves lift by forcing air to move faster over the top of the wing.
Question 5: Pressure is measured as force per unit area.
Question 6: If the amount of a gas in a sealed container increases, the pressure in the container also increases.
