Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
Two geological field teams are working in a remote area. A gps tracker at their base camp show the location of the first team 38km away, 19 degrees north of west, and the second team as 29 km away,
In order to measure the velocity of a rifle a student fires it horizontally at target that is 100 m away. When the bullet hits the target it has dropped a vertical distance of 5.00cm. a) what is th
A ball is thrown upward from the ground with an initial speed of 30.0 m/s, at the same instant another ball is dropped from a building 100m high. a) at what time after the ball is dropped will the b
A rubber ball is dropped and bounces vertically from a horizontal concrete floor. If the ball has a speed of 2.8 m/s just before striking the floor and a speed of 2.0 m/s just after bouncing, what i
A box is given a push so that it slides across the floor. How far will it go, given that the coefficient of kinetic friction is 0.18 and the push imparts an initial speed of 3.9 m/s?
A 78 kg diver steps off a 11 m tower and drops, from rest, straight down into the water. If he comes to rest 4.1 m beneath the surface, determine the average resistance force exerted on him by the w
A wild horse starts from rest and runs in a straight line 29° north of west. After 33 s of running in this direction, the horse has a speed of 17 m/s. (a) What is the magnitude of the horse's av
A toaster rated at 1000 W operates on a 120 V household circuit and a 4.00 m length of nichrome wire as its heating element. The operating temperature of this element is 310°C. What is the cross
A plane flies 345 km due south, then turns and flies 615 km at a heading 45.0 degrees north of east, until its due east of its starting point. if the plane now turns and heads for home, how far will
A displacement vector is 19.0 m in length and is directed 33.0o east of north. What is the northward component of this vector? What is the eastward component of this vector?
A speedboat moving at 40.0m/s approaches a no-wake buoy marker 100m ahead. The pilot slows the boat with a constant acceleration of negative 3.05 m/s^2 by reducing the throttle. How long does it tak
A 1,000.0 kg car with a speed of 90.0 km/h brakes to a stop. (a) How much energy in J is expended with the stop? and (b) How much heat in kcal is generated by the brakes as a result?
A rifle is aimed horizontally at a target 50.0 m away. The bullet hits the target 1.70 cm below the aim point. What was the bullet's flight time? What was the bullet's speed as it left the barrel?
With the engines off, a spaceship is coasting at a velocity of +290 m/s through outer space. It fires a rocket straight ahead at an enemy vessel. The mass of the rocket is 1400 kg, and the mass of t
Ignore friction and wind resistance. Find the magnitude and direction of the average force she exerts on the wall (which has the same magnitude, but opposite direction, as the force that the wall ap
A car whose mass is 1600 kg (including the driver) has a maximum acceleration of 1.2 m/s2. If three passengers, each has a mass of 80kg are also in the car, what is the acceleration?
A magnetic computer disk 9.40 cm in diameter is initially at rest. A small dot is painted on the edge of the disk. The disk accelerates 680.0 rad/s2 for 0.500s, then coasts at a steady angular veloc
Ann is driving down a street at 54 km/h. Suddenly a child runs into the street. If it takes Ann 0.744 s to react and apply the brakes, how far will she have moved before she begins to slow down?
Compute the mass (in units of solar masses) of Sgr A* implied by the new results. Do the two stars give a consistent answer?
An AM radio station broadcasts with a power of 28.0kW at a frequency of 890kHz. Estimate the intensity of the radio wave at a point 13.0km from the broadcast antenna.
If the backpack begins to slide when the spring ( = 140 ) stretches by 2.50 , what is the coefficient of static friction between the backpack and the table?
A firefighter of mass 69 kg slides down a vertical pole with an acceleration of 3 m/s2. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on him? Answer in units of N.
A projectile is launched at an angle of 28 degrees above the horizontal and lands at the same level from which it was launched 2.70 seconds later. What is the magnitude of the initial velocity?
An open-open organ pipe is 66.8 long. An open-closed pipe has a fundamental frequency equal to the third harmonic of the open-open pipe. How long is the open-closed pipe?