Hardness may be defined as the resistance of a material to scratching.

a. True

b. False

Two slits in an opaque barrier each have a width of 0.020 mm and are separated by 0.050 mm. When coherent monochromatic light passes through the slits the number of interference maxima within the central diffraction maximum: Group of answer choices

Write an expression for the relationship between the spring constant and the displacement of an object hanging from a spring. do the same for the displacement of the spring when the object is compressing the spring.

How is constant acceleration indicated on a motion map?

What would be the effect on the annual march of the seasons if earth's axis were not inclined relative to the plane of the ecliptic?

The train traveled 500 kilometers north to Odessa in 2 hours. What is the train's speed? What is it's velocity?

A moving object can be in equilibrium. Explain.

If gravity puts a force of 3N an object, how much force would it put on an second object that was twice as heavy

Where did the asteroids in the asteroid belt come from?

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.