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Anna71 [15]
2 years ago
15

A piano tuner uses a tuner to create a tone of 5.00 x 10² Hz. When a key on the piano is struck he hears 5 beats per second. Wha

t is a possible frequency of vibration for the piano string?
2500 hz

1300 hz

605 hz

495 hz
Physics
1 answer:
Grace [21]2 years ago
6 0
Yo answer is 605 hz that is the average hz of a piano
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kolezko [41]

Answer: 34.6N


Explanation:


1) The friction force that acts on the skis as you move down the mountain follows the rule:


Friction force = friction kinetic coefficient × Normal force


2) The friction kinetic coeffcient for waxed wood skis on snow is reported in some literature as 0.10.


3) The normal force is given in the statement: 346 N


4) With that you calculate the friction force as:


Friction force = 0.1 × 346N = 34.6N

4 0
2 years ago
At a certain time a particle had a speed of 87 m/s in the positive x direction, and 6.0 s later its speed was 74 m/s in the oppo
Viefleur [7K]

Answer:

The average acceleration during the 6.0 s interval was -27 m/s².

Explanation:

Hi there!

The average acceleration is defined as the change in velocity over time:

a = Δv/t

Where:

a = acceleration.

Δv = change in velocity = final velocity - initial velocity

t = elapsed time

The change in velocity will be:

Δv = final velocity - initial velocity

Δv = -74 m/s - 87 m/s = -161 m/s

(notice the negative sign of the velocity that is in opposite direction to the direction considered positive)

Then the average acceleration will be:

a = Δv/t

a = -161 m/s / 6.0 s

a = -27 m/s²

The average acceleration during the 6.0 s interval was -27 m/s².

8 0
2 years ago
An object with 274 J of GPE is 140cm above the ground. What is its mass?
Amanda [17]
E=274J
h=140cm=1,4m
g≈9,8m/s²

m=?

E=mgh
m=E/gh=274J/9,8m/s²*1,4m≈20kg



"Non nobis Domine, non nobis, sed Nomini tuo da gloriam."



Regards M.Y.
3 0
3 years ago
Which of these characteristics did all of the five waves of immigrants have in common A. They all had the same political beliefs
timofeeve [1]
I am pretty sure it is c
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3 years ago
HEEEEELLLPPPPPP!!!!!!!!!!! PPPPPPPPPPPLLLEAASSEE!!!
o-na [289]

Answer:

The arrows always start at the magnet's north pole and point towards its south pole. When two like-poles point together, the arrows from the two magnets point in OPPOSITE directions and the field lines cannot join up. So the magnets will push apart (repel).

4 0
3 years ago
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