Tuesday
July 29, 2014

Posts by LK


Total # Posts: 18

math
In a random sample of 75 individuals, it was found that 52 of them prefer coffee to tea. What is the margin of error for the true proportion of all individuals who prefer coffee?

math
has a vertex of (0,2) and points (1,8)find a,b,c

statistics
$12,553.65

PHYSICS(URGENT)
A particle has a mass of 5kg. It is held at a height of 3 metres above the ground. Find: a.Its potential energy b.It’s kinetic energy when is hits the ground c.The speed with which the particle hits the ground

PHYSICS(URGENT)
A body of mass 0.5 kg is thrown vertically upwards with a speed of 10 m/s. Determine: a.The initial kinetic energy of the body b.The gain in potential energy when the body has reached its maximum height c.The maximum height reached above the starting position

PHYSICS
A car is moving at a constant velocity of 5.5m/s. How much net force is required to raise its velocity to 14 m/s in 30 seconds? Suppose the car has a mass of 150kg.

PHYSICS
A car is moving at a constant velocity of 5.5m/s. How much net force is required to raise its velocity to 14 m/s in 30 seconds? Suppose the car has a mass of 150kg.

PHYSICS
A car is moving at a constant velocity of 5.5m/s. How much net force is required to raise its velocity to 14 m/s in 30 seconds? Suppose the car has a mass of 150kg.

PHYSICS
If your mass on earth is 70 kg what will be your mass on the moon considering that the gravitational field strength on the moon (g) is 1/6 of that on the earth. (g on earth = 10N/kg)

physics
A car accelerates from rest at a steady rate of 1 ms-2. Calculate: (a) the time taken to reach 15 ms-1 (b) the distance travelled during this time (c) the velocity of the car when it was 100 m from the start point

physics
A car accelerates from rest at a steady rate of 1 ms-2. Calculate: (a) the time taken to reach 15 ms-1 (b) the distance travelled during this time (c) the velocity of the car when it was 100 m from the start point

geometry
Prove line segment BP is 2/3 of line segment BD in triangle ABC

Chem
1, 3, 4

geometry
856

Physics
If a ball has a constant acceleration of 10m/s^2, how fast will the ball be rolling after 4 seconds? Would you multiply acceleration times time? So 10 x 4... or would you use the equation d=1/2gt^2?

Physics
A 3.8 kg fish swimming 1.3 m/s swallows an absent minded 1.4 kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch. What is the velocity v of the smaller fish before lunch?

Physics
A railroad diesel engine weighs 3.6 times as much as a freightcar. If the diesel engine coasts at 4.3 km/h into a freightcar that is initially at rest, how fast do the two coast after they couple together? )

Physics
@kelly..may i know why have to l-l cos delta?

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