Search our library of homework questions

Top answers

All subjects

All levels

A ball is thrown at speed u = 10.0 m/s at an angle of 30.0 degrees to the ground at height, s = 0. How far does the ball travel horizontally from its starting position? (Ignore air resistance and taking g = 9.81 m/s^2)

First, find the speed of the ball in the horizontal (x) and vertical (y) directions. u_x = ucos(30) = 8.66m/s and u_y = usin(30) = 5 m/s. Using an appropriate suvat equation f...

Answered by Alex T. • Physics tutor

2462 Views

Describe the Hjulström curve.

The critical erosion velocity line shows the minimum velocity needed to transport and erode a particle. Common sense tells us that the larger the particle, the more energy it needs to pic...

Answered by Hayley F. • Geography tutor

16069 Views

Draw the full curly mechanism for the reaction between Bromo-Methane and NaOH. What reaction is it?

The negatively charged OH group attacks the backside of the Bromo-Methane (backside in the sense that it is the opposite side to which Bromine is bonded).

A transition state consisting of a central...

Answered by Balthasar B. • Chemistry tutor

3842 Views

What is the gradient of the graph y = 3x^2 + 5x + 2, when x is 4?

To find the gradient of the graph, we need to differentiate the equation. So if y = xⁿ ==> the derivative dy/dx = nx^n-1 This means that dy/dx = 6x + 5 for this eq...

Answered by Rishabh H. • Maths tutor

5815 Views