Answer:
The answer is D.
Explanation:
Look at these options. Do all of these require effort? Yes. If you were to push a shopping cart, do you have to apply force? if you were to lift a book, do you indeed move the book, does it exert force? While walking up stairs, do you have to move your legs uphill, is there force used? All of these require input, and force. Most things in life require work, unless we have a machine to do it for us.
Answer:
With the development in technology scientists now have improved ways to predict future climates based on past data and past accuracy in such predictions. Researchers can predict future climates by entering past climate data into a computer program if it accurately provides current climate based on data from the past, then we can also predict future climate.
Explanation:
Climate Change is the different changes in the Earth's climate. These changes include changes in some Earth's climate such as temperature, precipitation, rising sea levels.
Over the years, the climate of the Earth continued to get worst, majorly due to the numerous activities of humans which has negatively affected Earth's climate. Some of the scientific research shows increased deforestation, the use of power plants, vehicles, and industries that still uses fossil fuels emit carbon dioxide which traps heat in the atmosphere, are some of the numerous activities of humans that have led to climate change. Using clean and renewable energy sources, preventing deforestation, are some of the ways to improve the climate.
Answer:
the stopping distance is greater than the free length of the track, the vehicle leaves the track before it can brake
Explanation:
This problem can be solved using the kinematics relations, let's start by finding the final velocity of the acceleration period
v² = v₀² + 2 a₁ x
indicate that the initial velocity is zero
v² = 2 a₁ x
let's calculate
v =
v = 143.666 m / s
now for the second interval let's find the distance it takes to stop
v₂² = v² - 2 a₂ x₂
in this part the final velocity is zero (v₂ = 0)
0 = v² - 2 a₂ x₂
x₂ = v² / 2a₂
let's calculate
x₂ =
x₂ = 573 m
as the stopping distance is greater than the free length of the track, the vehicle leaves the track before it can brake
Two thermometers, calibrated in celsius and fahrenheit respectively, are put into a liquid. the reading on the fahrenheit scale is four times the reading on the celsius scale. the temperature of the liquid is: