An explosion occurs 340 km away. Given that sound travels at 340 m/s, the time the sound takes to reach you is

a. 1 s.

b. 10 s.

c. 100 s.

d. 200 s.

e. more than 200 s.

A potted plant has a weight of 24.5 N. What is the mass of the potted plant?

A car weighing 10,000 newtons is parked in a garage. Which statement is true about the forces acting on the car?

Which scale measures the amount of damage after an earthquake? Richter scale Mercalli intensity scale moment magnitude scale seismograph scale

A rigid tank internal energy of fluid 800kJ. Fluid loses 500kJ of heat and padle wheel does 100kJ of work. Find final internal energy in tank.

A motorcyclist rides for 1.5 hours at a speed of 80 km/h. Then she encounters traffic and rides 20 km at an average speed of 25 km/h. What total distance did she cover?

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A person lifts a 4.5 kg cement block a vertical distance of 1.2 m and then carries the block horizontal - ly a distance of 7.3 m. determine the work done by the person and by the force of gravity in this process.

A tree is standing in the middle of a meadow. As you watch, the wind begins to blow and the tree bends. Which statement best explains how you could tell that a net force was acting on the tree? OA) The tree had momentum.

A 5.1 kg black bear cub weighs 49.98 N. The cub is carried by its mother up into the safety of a white pine tree.

Which location is associated with persistent upwelling of cold water to the ocean surface?