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Kobotan [32]
3 years ago
9

How do helmets protect your head? a. By creating a large area to spread out the pressure of a blow to your head. b. By focusing

the pressure of a blow into a small area. c. By creating a vacuum that protects your head. d. By creating a pressure gradient that traps energy away from your skull.
Physics
2 answers:
vagabundo [1.1K]3 years ago
8 0
I think its c.by creating a pressure gradient that traps energy away from your skull.

Andru [333]3 years ago
5 0
Your answer is A.

I hope this helps
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An organism’s scientific name consists of a. its class name and its family name. b. its kingdom name and its phylum name. c. its
mr Goodwill [35]
An organism scientific name consist of : C. its genus name and its species name
The first part of the name is taken from the Genus and the second part of the name is taken from the species
hope this helps

7 0
4 years ago
Suppose the acceleration of an elevator is 1/2 g upward, then what is the reading on the scale in the elevator.
Irina-Kira [14]

Answer:

c. 3/2 mg

Explanation:

Given that the acceleration of an elevator is 1/2 g upward.

The reading on the scale of the elevator is the net external force acting on the elevator.

Let the force F acting on the elevator as shown,

By using Newton's 2nd law, F_{net}=ma

where, F_{net} is the net force acting on the elevator.

m is the mass of the elevator,

a is the acceleration of the elevator, as given a=1/2 g upward.

So, F_{net}=m\times \frac 1 2 g

F-mg=m\times \frac 1 2 g \\\\F=mg+ \frac 1 2 mg \\\\F= \frac 3 2 mg.

So, the reading on the scale in the elevator is \frac 3 2 mg.

Hence, option (c) is correct.

4 0
3 years ago
A wire carrying an electric current is often likened to a pipe carrying water. What part of this analogy is incorrect?
tamaranim1 [39]

In a direct current (DC) electrical circuit, the voltage (V in volts) is an expression of the available energy per unit charge which drives the electric current (I in amperes) around a closed circuit. Increasing the resistance (R in ohms) will proportionately decrease the current which may be driven through the circuit by the voltage.

Each quantity and each operational relationship in a battery-operated DC circuit has a direct analog in the water circuit. The nature of the analogies can help develop an understanding of the quantities in basic electric ciruits. In the water circuit, the pressure P drives the water around the closed loop of pipe at a certain volume flow rate F. If the resistance to flow R is increased, then the volume flow rate decreases proportionately. You may click any component or any relationship to explore the the details of the analogy with a DC electric circuit.

6 0
4 years ago
Question
Eva8 [605]

Answer:

here's the pdf for it

IB QuestionbankExplanation:

5 0
3 years ago
What is the weight, in newtons, of a 50.-kg person on the Moon?
solniwko [45]
A 50kg object on earth weighs 81.67 on the moon
5 0
4 years ago
Read 2 more answers
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