Biology
Biology, 24.03.2020 21:05, jholland03

A construction worker uses a hammer to drive a sharp nail into a concrete wall. What two simple machines is the construction worker using when he does this task?
A.
a lever and a pulley
B.
a screw and a wheel and axle
C.
an inclined plane and a pulley
D.
a wedge and a lever

answer
Answers: 3

Other questions on the subject: Biology

image
Biology, 21.06.2019 19:00, pattyv9845
Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.
Answers: 3
image
Biology, 22.06.2019 01:00, justhereforanswers13
Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.
Answers: 1
image
Biology, 22.06.2019 02:00, iixyloa
Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.
Answers: 3
image
Biology, 22.06.2019 08:00, tmax8437
Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen
Answers: 2
Do you know the correct answer?
A construction worker uses a hammer to drive a sharp nail into a concrete wall. What two simple mach...

Questions in other subjects: