Other Physics Answers

A brass rod is 60.04cm at 20ºC. To what temperature must it be raised to make it 60.05cm long?

A 10-g rifle bullets requires a speed of a 400 m/s in traversing a barrel 50 cm long. find the average acceleration and acceleration force?

a volleyball is spiked so that its incoming velocity of +4.89m/s is changed to an outgoing velocity of -11.7m/s. The mass of the volleyball is 377g. What is the magnitude of the impulse that the player applies to the ball?

A bus is moving at 5.0 m/s when a passenger walks forward at 1.5 m/s relative to the bus. How fast is this passenger moving as seen and measured by (a) a person waiting at the bus stop and (b) the driver of the bus?

1. The half-life of an isotope is 5 years. What fraction of the isotope will remain after 20 years?

2. The half-life of Bi-210 is 5 days. What percentage of a sample of Bi-210 will remain after 10 days?

The force between two electrical charges is 0.4 N. What would be the force if the charges are doubled, and the distance between them increased by 100%? 

A sound sour moving at a constant speed of 249 m/s towards a detector, emits sound at a constant frequency of 5,100 Hz. Take the speed of sound in the air as 340 m/s. Calculate the wavelength of the sound emitted by the source

1. A capacitor consists of two square metal plates, each measuring 5.0 x 10-2 m on a side. In between the plates is a sheet of mica measuring 1.0 x 10-4 m thick. (a) What is the capacitance of this capacitor? (b) If the charge in one plate is 2.0 x 10-8 C, what is the potential difference between the plates?

A solid conducting sphere of radius 20.00cm has a charge of 2.00ųC. If the potential is zero at infinity, find the value of the potential at the following distances from the center of the sphere:

a. 5.00cm b. 10.00cm c. 15.00cm

Compute the minimum distance that a truck slides on a horizontal asphalt road if it is traveling at 20 m/s? The coefficient to sliding friction between asphalt and rubber tire is at 0.50. The weight of the truck is 8000 kg