(a) Compute the impulse necessary to bring to rest the 45.0 kg driver of an automobile initially moving at 26.0 m/s.

(b) Find the average force on the driver if the deceleration is accomplished gradually by the application of brakes over a 10.6 s interval.

(c) Find the average force if the car is stopped in a collision that brings the driver's seat to rest in 0.100 s, assuming the driver is restrained by a seat belt.

What is the heaviest barbell that could be lifted : The box of a well-known breakfast cereal states that one ounce of the cereal contains 128 Calories (1 food Calorie = 4186 J). what is the heaviest barbell that could be lifted a distance of 2.08 m |

Determine power transmitted by wave-frequency of the wave : A sinusoidal wave on a string is described by the wave function y = 0.19 sin (0.90x ? 62t) where x and y are in meters and t is in seconds. The mass per unit length of this string is 12.0 g/m. Determine speed of the wave. m/s. Determine wavelength of.. |

Find the initial speed of the bullet : A bullet of mass 11.4 g is fired into an initially stationary block and comes to rest in the block. Find the initial speed of the bullet |

Determine the transverse speed element of the string : A transverse wave on a string is described by the following wave function. y = 0.105 sin [(?/12)x + 5?t] where x and y are in meters and t is in seconds. (a) Determine the transverse speed at t = 0.290 s for an element of the string located at x = 1... |

Estimate the average force on the driver : Find the average force on the driver if the deceleration is accomplished gradually by the application of brakes over a 10.6 s interval |

Consider the sinusoidal wave of in figure-what is coordinate : Consider the sinusoidal wave of in the figure below with the wave function y = 0.150 cos (15.7x ? 50.3t) where x and y are in meters and t is in seconds. At a certain instant, let point A be at the origin and point B be the closest point to A along t.. |

Distance from the seismograph to the focus of the quake : A seismographic station receives S and P waves from an earthquake, separated in time by 16.8 s. Assume the waves have traveled over the same path at speeds of 4.50 km/s and 7.40 km/s. Find the distance from the seismograph to the focus of the quake. |

Green–yellow region of the visible electromagnetic spectrum : The eye is most sensitive to light having a frequency of 5.45 1014 Hz, which is in the green–yellow region of the visible electromagnetic spectrum. What is the wavelength of this light? m |

Magnetic field in the sunlight at the earths location : Assume the intensity of solar radiation incident on the cloud tops of the Earth is 1 518 W/m2. (a) Taking the average Earth–Sun separation to be 1.496 1011 m, calculate the total power radiated by the Sun. W (b) Determine the maximum value of the ele.. |

## Estimate the focal length of the eyepieceThe distance between the lenses in a compound microscope is 18 cm. The focal length of the objective is 1.5 cm. what must be the focal length of the eyepiece |

## Calculate the net work done by both gravity and frictionA 5.00 kg block slides down the inclined plane at 20 angle as shown in the diagram below at a constant velocity. Calculate the net work done by both gravity and friction |

## Determine the thermal conductivity of the styrofoamA Styrofoam box has a surface area of 0.74 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, determine the thermal conductivity of the Styrofoam |

## What is the wave speed at the bottom of the ropeOne end of a nylon rope is tied to a stationary support at the top of a vertical mine shaft of depth 85.0 m. What is the wave speed at the bottom of the rope |

## What is the charge on the upper sphereAt what position is the third bead in equilibrium? Can it be in stable equilibrium. |

## Find the acceleration of the two teamsTwo teams of nine members each engage in a tug of war. The first team's members have average masses of 70 kg and exert average forces of 1350 N horizontally, What is the acceleration of the two teams |

## How long does it take dave to reach the waterReluctant diver Dave is hanging by his fingertips at the high-dive board, a distance of 8m from the water. His friend pries his fingers from the board, How long does it take Dave to reach the water |

## Find the mass of a lead weightA fishing line has attached to it a hollow plastic float 2.65 cm in diameter and having a mass of 1.50 g. Find the mass of a lead weight |

## Obtain the height of the final imageA diverging lens (f = -11.0 cm) is located 25.0 cm to the left of a converging lens (f = 36.0 cm). What is the height of the final image |

## Calculate the resistivity of the leaf tissueResistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. What is the resistivity of the leaf tissue |

## Find the distance between the centers of the spheresFind the distance between the centers of the spheres. |

## To what angle beta can be sculpture be tippedA steady torque of 23-N•m is applied to a grindstone whose moment of inertia is 0.130 kg•m2. Using energy principles, and neglecting friction, determine the angular speed after the grindstone has made 13.0 revolutions. |

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