6. Suzie hammers on a block of wood when she is 85 meters from a large brick wall. Each time she

she hits the block, she hears an echo 0.50 s later. With this information, show that the speed of

sound is 340 m/s.

Rills, gullies, streams, rivers and tributaries are all caused by

Arrange the four energy units from largest to smallest.

A driver has a reaction time of 0.50 s, and the maximum deceleration of her car is 6.0 m/s2. she is driving at 20 m/s when suddenly she sees an obstacle in the road 50 m in front of her.

Difference between relaxation time and collision time?

When you drop a penny off the roof of a building, it takes 10 seconds to reach the ground. How high is the roof?

Consider the moment when the spring is at its maximum compression. At that moment, the kinetic energy, the gravitational potential energy, and the elastic potential energy are, respectively, a - zero, at a maximum, and at a maximum b - at a maximum,

Ari, a young patient who is regularly treated by a psychiatrist, feels compelled to carry out repetitive tasks the same way very frequently. If Ari does not conduct these tasks with extreme precision, he can feel extremely nervous and uncomfortable.

A friend says, "Stars produce energy by a fusion chain reaction of helium into hydrogen." Evaluate the validity of this statement. A) It is an valid statement. Stars produce energy by a fusion chain reaction of hydrogen into helium.

If the mass of a material is 42 grams and the volume of the material is 15 cm^3, what would the density of the material be? answer: Unit:

35. An object of mass m moving at speed v0 strikes an object of mass 2m which had been at rest. The first object bounces backward along its initial path at speed v0.