Which machine has an IMA less than 1

A: rake

B: a crowbar

C: a bottle opener

D: a shovel

A heat engine exhausts 8400 j of heat while performing 3600 j of useful work. what is the efficiency of this engine?

A baseball is hit with a speed of 28.0 m/s at an angle of 42.0 ∘. It lands on the flat roof of a 12.0 m - tall nearby building. If the ball was hit when it was 1.

Convert planks constant in cgs system

In a two-slit experiment using coherent light, the distance between the slits and the screen is 1.10 m, and the distance between the slits is 0.0400 mm. If the second order bright fringe is measured to be 4.

This is a physical process which takes place when rocks are broken down without any change in their chemical nature. the rocks are broken apart by physical force,

Most metallic ores are produced by which two of processes? a) Metamorphic and Sedimentary b) Igneous and Metamorphic c) Igneous and Sedimentary d) Cementation and Compaction

Two persons are applying forces on two opposite sides of a moving cart. The cart still moves with the same speed in the same direction. What do you infer about the magnitudes and direction of the forces applied?

SI unit of mass and gravity

What is the difference between porosity and permeability

In the diagram below, the planets' relative distances from the Sun are shown. The sizes of the planets are not drawn to scale.