(a) Compute the electrical energy used by a household whose monthly electrical bill is $37, computed at the rate of $0.08 per kWh. (b) How long could this energy be used to burn ten 12 W light...
(a) Compute the electrical energy used by a household whose monthly electrical bill is $37, computed at the rate of $0.08 per kWh. (b) How long could this energy be used to burn ten 12 W light...
A 3.60 kg block starts from rest and slides down a frictionless incline, dropping a vertical distance of 3.50 m, before compressing a spring of force constant 2.34* 10^4 N/m. Find the maximum compression...
question a:write an equation that gives the baseballs height as a function of the time in seconds after it is hit. question b: after how many seconds is the baseball 84 feet above the ground?...
If the spring is compress able too
How much work is required to lift a 4.4-kg concrete block to a height of 2.6 m?
A 24.0 kg uniform solid cylinder has a radius of 0.259 m. If the cylinder accelerates at 3.90 × 10−2 rad/s2 as it rotates about an axis through its center, how large is the torque acting on the cylinder...
A bucket ?lled with water has a mass of 53 kg and is hanging from a rope that is wound around a 0.046 m radius stationary cylinder. The acceleration of gravity is 9.81 m/s2 . If the cylinder does...
A convex lens has a focal length of 40 cm in air. What is the focal length when immersed in water? Index of refraction for air-glass is 1.54, ? for air-water is 1.33.
A crude microscope consists of an objective of 1.5 cm focal length & eyepiece of 5 cm focal length. Lenses are placed 18 cm apart. A person uses the microscope to form an image at infinity. Where...
A double-convex lens of 6.25 cm focal length is used as a simple microscope. If it is held close to the eye to form an image 25 cm from the eye, where should the object be located? What is the angular...
A farsighted eye cannot form a sharp image of an object which is closer than 40 cm. Find the focal length & power of a lens which will permit the eye to form a sharp image of an object 25 cm distant,...
A tuning fork of frequency 1000 Hz is mounted 25 cm from the axis of a rotating horizontal table turning at a rate of 4 revolutions per second. What are the highest & lowest frequencies heard...
A physics student decides he wants to see how fast his dad’s new sports car will accelerate, so he fashions a chronometer (angle indicator shown in the figure) that he attaches to the passenger-side...
1. Three ropes are attached to the same point on a large object. Betty pulls one rope with a 100-N force due east, and Veronica pulls the 2nd with a 150-N force 45 degrees north of east. Jughead pulls...
Physics question. How many kilometers would you have to go above the surface of the earth for your weight to decrease to 51{\rm \\%} of what it was at the surface?
Within the tertiary cooling system of a pressurised water cooler, a test circuit is set whereby an off-shoot rotor (magnets on a shaft) is required to transmit 3MW of power at 200rpm to a test-monitoring...
1. Three ropes are attached to the same point on a large object. Betty pulls one rope with a 100-N force due east, and Veronica pulls the 2nd with a 150-N force 45 degrees north of east. Jughead pulls...
A physics student decides he wants to see how fast his dad’s new sports car will accelerate, so he fashions a clinometer (angle indicator shown in the figure) that he attaches to the passenger-side...
A 50-kg crate is being pushed across a level, frictionless floor by a force F = 200 N. A 10-kg box is placed initially at rest against the crate as shown at the moment the force is applied. The coefficients...
A satellite is orbiting earth in an elliptical path. The distance to the earth from the satellite at aphelion is ra at perihelion is rp. Find the ratio of its speed at perihelion to that at...