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A converging lens has a focal length of f = 23 cm. An object is placed 44 cm from the lens. Find the size of the image in cm if the object has a height of 4 cm. Express the answer with one decimal p
Calculate the magnitude and direction of the magnetic field in the region through which the current passes.
A rocket explodes into three pieces of equal mass. Immediately after the explosion their velocities are (120 m/s, south), (240 m/s, north) and (120 m/s east). What was the velocity of the rocket's
A metal cube with 40cm side is heated to 400C. it is placed in a room at 25C. Assume it behaves like a black body. Calculate the net power of cube due to radiation.
Both speakers emit sound waves that travel directly from the speaker to point P. a) For what values of x will destructive interference occur at point P?
The loop has a mass 60 grams and resistance 2.3 ohms. The magnetic field oscillates in time according to the equation B=B_0 sin(Omega t ), with B_0= 12 T and Omega= 350 rad/s. What is the maximum cu
Weights are sometimes added to the arms of a boomerang. What effect would this have on the spinning of the boomerang? Where should they be placed for greatest effect? Please indicate the location an
The moment of inertia of a 4.0m long board pivoted at its center is 25kgm2. Find the moment of inertia when it is used as a see-saw with two 50kg kids sitting 1.8mm from the pivot.
Consider a 2210 lb automobile clocked by law enforcement radar at a speed of 85.5 mph. If the position of the car is known within 5.0 feet at the time of the measurement, what is the uncertainity in
What is the uncertainity in the position of an electron moving at 2.00/10^6 m/s with an uncertainity of (traingle v)= 0.01*10^6 m/s?
Suppose Tarzan leaps from the top of a 60-m tall building. If his initial speed is 24 m/s and at an angle of 23 degrees above the horizontal, then with what speed does he hit the ground as he lands
How far will the cookie slide (in m) from the position where the spring is unstretched before coming momentarily to rest?
Each ball has cross-sectional area 4.00 cm^2 and is so shaped that it has a drag coefficient of 0.600. Calculate the power input required to spin the beater at 1000 rev/min (a) in air and (b) in wat
The flywheel is a uniform solid cylinder with mass 1600 kg and radius 0.600 m. The bus body does work against air resistance and rolling resistance at the average rate of 18.0 hp as it travels with
The listener and the speakers are all in the same hori- zontal plane and the speed of sound is 340 m/s. [Hint: Start with determining the maximum path difference between the two waves at points on t
Cellphones use radio waves, some at a frequency of 840.1 MHz. An efficient antenna is a quarter of a wavelength long. Such an antenna for a cellphone would have a length of (answer should be in cm).
A simple harmonic oscillator consists of a block of mass 3.90 kg attached to a spring of spring constant 169 N/m. When t = 3.00 s, the position and velocity of the block are x = +0.129 m and v = +3.
A vertical magnetic field decreases at a rate of 57.0 mT/s. A flat circular coil of 1000 turns with a 25.0 cm diameter has a 106 uF capacitor across its terminals. If the coil is placed perpendicula
On average, Venus is 0.72 AU from the sun and its surface temperature is 735 K. Calculate how much of this is due to Venus's greenhouse effect? (On average, Venus reflects 75% of incoming light back
A tank of compressed oxygen gas at a doctor's office has a pressure of 105 times atmospheric pressure. If the volume of the tank is 525 cm3, how many oxygen molecules does it contain? Answer in mole
Determine the scalar potential due to a 1m-long horizontal line of charge with 10mC total charge. Use this result to evaluate the electric field at the centre of a square constructed from four of th
A body of mass 3kg with an initial velocity of 2 m/s makes an elastic collision with another body (m2= 2kg) at resvelocity of the center mass of the two body system before and after the collision.
Two charges repel each other r with a force of 10^ -6N when they are 10 cm apart. When they are brought closer together until they are 2 cm aprt, the force between them becomes:
You are driving north on 107th Avenue at a speed of 29.2 mph. A police car whose siren produces a sound at a frequency of 549 Hz is approaching from the opposite direction at a speed of 55.9 mph. A
You are driving east on 8th Street (Tamiami Trail) at a speed of 27. In the rearview mirror, you see an ambulance approaching at what you estimate to be roughly twice your speed. You hear the siren