Which of the following is contained in a pull start lawnmower?

a pulley and a wheel and axle

a wheel and axle and an inclined plane

a pulley and a wedge

a wheel and axle and a block and tackle

Which of the following should be useful to show the percentage of total growth in plants exposed to various pollutants? A. line graph B. circle graph C. frequency table D. bar graph

An object in free fall moves at the same speed with time and does not accelerate. True False

The largest volcanic structures on venus are called:

You are in a spaceship far outside our solar system. Inside your spaceship there is not gravity and no air (and therefore no air resistance). If you toss a ball across the spaceship, how do Newton's laws predict its motion will change as it moves?

If the resistance in a circuit connected to a constant current is halved, how is the voltage in the circuit affected? The voltage remains constant. The voltage is doubled. The voltage is reduced by a factor of 4.

A substance has a density of 13.5 g/cm3. What is the volume of a 50 g block of this substance?

Select all of the answers that apply. Which statements are true regarding the scientific evidence supporting the big bang theory? Researchers found cosmic microwave background radiation, which is a heat imprint left over from the big bang.

How are magnetic poles and electrical charges similar? A. Their same forces repel each other, and their opposite forces attract each other. B. Their same forces attract each other, and their opposite forces repel each other. C.

As part of his meal, a workman has a cup containing a hot drink. In order to keep the drink hot whilst he eats the rest of his meal, he covers the cup, as shown in the figure. Which sources of energy loss does this action reduce? Tick two boxes.

When energy is transformed, the amount of usable energy?