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If a particular car covers the first half of the track at an average speed of 210 km/h, what minimum average speed must it have in the second half of the event in order to qualify?
Where Jo is a constant vector and r is the radial distance of the point. If r0 is the radius of the conductor, then calculate the total current through the conductor.
If a drop is to be deflected a distance of 0.300mm by the time it reaches the end of the deflection plate, what magnitude of charge must be given to the drop?
When the rheostat is adjusted to a value R1, the ammeter reads 0.75 of the full-scale value. When it adjusted to a value R2, the ammeter reads 0.25 of full-scale value. Compute the value of Ra in te
The power into a circuit element is the product of the voltage across the element and the current through the element. Assuming a voltage V(t)=V_p*cos(wt) across an inductor L, integrate the power o
if the sand you ran across has a specific-heat capacity of 835 j/(kg*c), how much energy must be added to a 2-kilogram pile of it to increase its temperature from 40*c to 50*c?
Geiger counter registers 416 counts per minute. 65.0 hours later, the counter registers 13 counts per minute. What is the half life of the isotope?
When a piece of glass is placed between the plates, the voltage across the capacitor drops to 30 V. What is the dielectric constant of the glass?
A pail of water is rotated in a vertical circle of radius 1.00 m. (a) What two external forces act on the water in the pail. (b) Which of the two external forces is most important in causing the wat
A vertical spring with a force constant of 700 N/m is initially at equilibrium. A 10 kg mass is attached to the end of the spring, causes it to elongate. What will be the maximum elongation/deformat
A particle moves along the x axis according to the equation x=50t +9t^2 (where t is in seconds and x is in meters). Calculate the instantaneous acceleration of the particle at t= 3.0s
Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constan
The gauge pressure in a helium gas cylinder is initially 27 atm. After many balloons have been blown up, the gauge pressure has decreased to 5 atm. What fraction of the original gas remains in the
The ratio of the average acceleration value is a1,a2 = 1.50. find the velocity of the car at the end of the initial tweleve-second interval?
A 101.0 N grocery cart is pushed 10.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is th
Suppose 140 moles of a monatomic ideal gas undergo an isothermal expansion from 1.00 m^3 to 4.00 m^3. What is the temperature at the beginning of this process? What is the temperature at the end of
A car is approaching a reflecting wall. How fast is the car traveling? What frequency does the car driver hear reflected from the wall?
A 29 g bullet is fired straight upward into an at rest 1.40kg block and the bullet is embedded in the block. The velocity of the bullet is 510 m/s. Show the conservation of mechanical energy and co
A 150 g ball and a 220 g ball are connected by a 36-{rm cm}-long, massless, rigid rod. The balls rotate about their center of mass at 130 rpm. What is the speed of the 150 g ball?
A length of wire is cut into 4 equal pieces. If each piece has a resistance of 0.31, what is the resistance of the original length of wire?
A motor scooter travels east at a speed of 15 m/s. The driver then reverses direction and heads west at 17 m/s. What was the change in velocity of the scooter?
David is driving a steady 23.0 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.60 m/s^2 at the instant when David passes.
The reader of the manual must know the minimum speed of the drop if it is to make it through the electric field region without hitting either of the plates. Find this minimum speed.
A merry go round has a moment of inertia of 0.5MR^2. whereby R=1.5m, and the mass of the solid disc is 100kg. when a boy of mass 25kg sits on the rotating disc at a distance of 0.5m from the edge w
A bowling ball encounters a 0.76 m vertical rise on the way back to the ball rack, as the drawing illustrates. Ignore frictional losses and assume that the mass of the ball is distributed uniformly