Need needs to be correct !
1.which of the following objects exerts the greatest gravitational force?

a.
earth

b.
moon

c.
sun

2.if a car is traveling on a flat road at a constant speed of 60 miles per hour, the fricition that is exerted upon the car must be

a.
greater than the force pushing the car forward.

b.
equal to the weight of the car.

c.
greater than the weight of the car.

d.
equal to the force pushing the car forward.

3.forklifts are commonly used in warehouses to move heavy objects. the image above shows a forklift that has just lifted a large crate several feet upward off of a warehouse floor.
in order to lift the crate, the forklift had to apply force that was greater than force of gravity affecting the crate.

a.
an upward; the downward

b.
a downward; the upward

c.
zero; the equal

You have been asked to lead a demonstration for the undergraduate microbiology lab course about the uses of negative staining when studying bacteria. a "negative" stain does not stain the bacterial cell itself but stains the space between cells. under magnification, the acidic (negativelycharged) nature of the stain will be repelled by the negatively charged bacterial cell wall and willleave the cell colorless in a stained background. negative stains are used primarily to reveal the presence of negatively charged bacterial capsules; therefore, they are also called capsule stains. encapsulated cells appear to have a halo surrounding them. the negative stain procedure does not require heat fixation, which limits any chances of alteration in bacterial cell shape and size. the bacterial suspension is added to a drop of stain, such as nigrosin or eosin, and drawn across the glass slide using a coverslip. nigrosin staining-not safranin staining-of klebsiella pneumoniae will allow for the visualization of the cell shape and the determination of the presence of a capsule. true/false

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation