Search & Filtering
Find the change in entropy when 3.0 kg of water is heated from 20°C to 80°C?
Two forces, F1= 8.0 N, 60 degrees northwest and F2= 12.0 N, southwest, are applied to a particle at the origin. What third force is needed so that the particle will not be displaced from the origin?
1. Mrs. Salcedo's car of mass 2.4 x 10³ kg travelling on the highway when the teacher receives an emergency call. She increased the speed of the car to 33 m/s.The increase in speed results in 3.1 x10^5 J of work done on the car. Determine the initial speed of the car in km/h.
1. Mrs. Salcedo's car of mass 2.4 x 10³ kg travelling on the highway when the teacher receives an emergency call. She increased the speed of the car to 33 m/s.The increase in speed results in 3.1 x10^5 J of work done on the car. Determine the initial speed of the car in km/h.
Given a starting resistance of 4g/cm4s and volumetric flow rate of 10 mL/s, what is the final resistance if the artery vasodilates 2x its original size? What is the final volumetric flow rate?
Given a starting resistance of 1g/cm4s, and volumetric flow rate of 9 mL/s, what is the final resistance if the radius of the artery gets 3x smaller? What is the final volumetric flow rate?
During stenosis, plaque builds up an artery. The original volumetric flow rate is 30 mL/s, the normal speed of blood in the vessel is 100cm/s and the original cross sectional area is 2 cm2. If we are dealing with 50% stenosis. what speed would we measure within the artery? What volumetric flow rate would we measure?
In a thermally insulated cylinder with an internal cross section S = 500 cm2 and a height l =
= 50 cm, there is a resistor with resistance R = 120 Ω. The cylinder is otherwise filled with air
at a temperature T0 = 20 ◦C and pressure p0 = 101 kPa, and the same kind of air surrounds
the cylinder. A current I = 200 mA flows through the resistor. A base of the cylinder breaks
away when pushed with a force exceeding F = 500 N. After what time does that happen?
What is the kinetic energy of the continent?
What is the gravitational field strength at the surface of a planet if a 2, k, g,
2kg basket of shopping weighs 52, N,
52N?
What do you mean by the Young’s modulus for steel is 𝒀 = 𝟐. 𝟎 × 𝟏𝟎𝟏𝟏 𝑵𝒎−𝟐 ? Explain briefly.
In the figure, block 1 of mass m1 slides from rest along a frictionless ramp from height h = 2.3 m and then collides with stationary block 2, which has mass m2 = 4m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction μk is 0.6 and comes to a stop in distance d within that region. What is the value of distance d if the collision is (a) elastic and (b) completely inelastic?
The tolerance is in the 2nd significant digit.
