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2 years ago

A sledgehammer is an example of what kind of simple machine?

Physics

1 answer:

alisha [4.7K]2 years ago

3 0

I am 95 percent sure the answer in C

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A wave has a wavelength of 14 m and a frequency of 24 Hz, what is the speed of the wave?

lapo4ka [179]

Answer:

Explanation: Speed = Wavelength x Wave Frequency. In this equation, wavelength is measured in meters and frequency is measured in hertz (Hz), .

6 0

2 years ago

Which of these is the best explaination for why two negatively charged balloons move apart without ever touching?

Dennis_Churaev [7]

Hello, sorry this is a little late!

I believe the correct answer to your question would be option D, electric charges have electric fields surrounding them to allow them to exert forces on other objects without touching them.

I just took this test, and can 100% confirm this is the proper answer.

Hope this helps, and have a great day! :)

6 0

2 years ago

Read 2 more answers

Waves with higher amplitude transfer ____energy.

natali 33 [55]

Answer:

- Waves with higher amplitude transfer HIGHER energy.

- Waves with higher frequency transfer HIGHER energy.

3 0

2 years ago

Juan rides his horse with a constant speed of 18 km/h. How far can he travel in 1/2 hour?

Brut [27]

Answer:

He traveled 9km

Explanation:

To do this problem you need to use the equation which is Speed= distance/time and this problem gives you the speed which is 18 km/h and it gives you the time 1/2 hour so you write the equation 18= d/ 1/2 which his distance is 9km

3 0

2 years ago

What happens to a circuit's resistance (R), voltage (V), and current (1) when

hammer [34]

Answer:

R increases

V is constant

I decreases

Explanation:

The resistance of a wire is given by the following formula:

$R = \frac{(Resistivity)(L)}{A}$

It is clear from this formula that resistance is directly proportional to the length of wire. So, when length of wire is increased, the resistance of circuit increases.

The voltage in the circuit will be constant as the voltage source remains same and it is not changed.

Now, we can use Ohm Law:

V = IR

at constant V:

I ∝ 1/R

it means that current is inversely proportional to resistance. Hence, the increase of resistance causes the current in circuit to decrease.

Therefore, the correct option will be:

D.

R increases

V is constant

I decreases

6 0

2 years ago