Friday

July 25, 2014

July 25, 2014

Total # Posts: 16

**Programming logic and design**

Design a program that lets the user enter the total rainfall for each 12 months into an array. The program should calculate and display the total rainfall for the year the average monthly rainfall, and the month with the highest and lowest amounts. In pseudo-code and a flowchart

**physics**

Divers in Acapulco dive from a cliff that is 56 m high. If the rocks below the cliff extend outward for 23 m, what is the minimum horizontal velocity a diver must have to clear the rocks?

**physics**

An airplane traveling 1015 m above the ocean at 115 km/h is going to drop a box of supplies to shipwrecked victims below. (a) How many seconds before the plane is directly overhead should the box be dropped? (b) What is the horizontal distance between the plane and the victims...

**physics**

An automobile wheel with a 9.00-cm radius and the radius to the rim is 7cm, as shown below, rotates at 2.50 rad/s. How fast does a point 6.50 cm from the center travel? 1 cm/s

**physics**

An athlete whirls in a 7.10-kg hammer tied to the end of a 1.2 m chain in a horizontal circle, as shown in the figure below. The hammer makes one revolution in 1.0 s. (a) What is the centripetal acceleration of the hammer? (b) What is the tension in the chain?

**physics**

thnak you i have the equation studied now

**physics**

A propeller slows from 490 rev/min to 177 rev/min in 3.50 s. What is its angular acceleration?

**physics**

The outer edge of a truck tire that has a radius of 25 cm has a velocity of 26 m/s. What is the angular velocity of the tire in rad/s?

**physics**

A 873-kg (1930-lb) dragster, starting from rest completes a 403.7-m (0.2523-mile) run in 4.920 s. If the car had a constant acceleration, what would be its acceleration and final velocity?

**physics**

Rocket-powered sleds are used to test the responses of humans to acceleration. Starting from rest, one sled can reach a speed of 444 m/s in 1.80 s and can be brought to a stop again in 2.15 s. (b) Find the acceleration of the sled as it is braking and compare it to the magnitu...

**physics**

The driver of a car going 90.0 km/h suddenly sees the lights of a barrier 35.0 m ahead. It takes the driver 0.75 s to apply the brakes, and the average acceleration during braking is -10.0 m/s2. (b) What is the maximum speed at which the car could be moving and not hit the bar...

**physics**

A helicopter is rising at 5.5 m/s when a bag of its cargo is dropped. (Assume that the positive direction is upward.) (a) After 1.5 s, what is the bag's velocity? (b) How far has the bag fallen?

**physics**

Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 2.7 km/s while moving it through a distance of only 2.5 cm. (a) What acceleration does the gun give this objec...

**physics**

A 1.0-kg mass (mA) and a 7.0-kg mass (mB) are attached to a lightweight cord that passes over a frictionless pulley. The hanging masses are free to move. Find the acceleration of the larger mass

**physics**

An 879-kg (1943 lb) dragster, starting from rest, attains a speed of 25.6 m/s (57.3 mph) in 0.59 s. (a) Find the average acceleration of the dragster during this time interval. (b) What is the magnitude of the average net force on the dragster during this time?

**physics**

A car is coasting backwards downhill at a speed of 3.2 m/s when the driver gets the engine started. After 2.5 s, the car is moving uphill at 5.0 m/s. Assuming that the uphill is the positive direction, what is the car's average acceleration?

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