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inysia [295]
3 years ago
13

Swinging a tennis racket against a ball is an example of a third class lever. Please select the best answer from the choices pro

vided. T F
Physics
2 answers:
kari74 [83]3 years ago
7 0
that statement is true

a Third class lever applied when the effort place between the load and the fulcrum.

For example, in a forearm serve
Fulcrum : The elbow
Effort : The effort that putted by the biceps muscle
Load : The arm

Kobotan [32]3 years ago
4 0

Answer:

The given statement is true.

Explanation:

One of the examples of a simple machine is Levers. It reduces the human effort to do work and make work easier. There are three classes of the lever.

The given case is "swinging a tennis racket against a ball". It is an example of the third class lever. In this type of class, the effort is placed in between the load and the fulcrum.

Hence, the swinging a tennis racket against a ball is an example of a third class lever. This statement is true.

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The equivalent resistance of a series combination of resistors is always greater than any individual resistance
Likurg_2 [28]

Answer:

true

Explanation:

Series resistors are additive

r1 + r2 + r3 = r total    the total will always be greater than any one of the parts

8 0
2 years ago
The expression below was formed by combining different gas laws.
kap26 [50]

Answer:

Avogadro's law.

Explanation:

Avogadro’s law states that, equal volumes of all gases at the same temperature and pressure contain the same number of molecules.

Mathematically,

V n

V = Kn where V = volume in cm3, dm3, ml or L; n = number of moles of gas;

K = mathematical constant.

The ideal gas equation is a combination of Boyle's law, Charles' law and Avogadro’s law.

V 1/P at constant temperature (Boyle’s law)

V T at constant pressure ( Charles’law)

V n at constant temperature and pressure ( Avogadro’s law )

Combining the equations yields,

V nT/P

Introducing a constant,

V = nRT/P

PV = nRT

Where P = pressure in atm, Pa, torr, mmHg or Nm-2; V = volume in cm3, dm3, ml or L; T = temperature in Kelvin; n = number of moles of gas in mol; R = molar gas constant = 0.082 dm3atmK-1mol-1

7 0
3 years ago
Radiant energy comes from the _______.
snow_lady [41]

Answer:

C. Sun

Explanation:

7 0
3 years ago
Read 2 more answers
How does a generator produce electrical energy?
Daniel [21]
The correct answer is B. it converts mechanical energy to electrical energy.
3 0
3 years ago
Read 2 more answers
A proton travels with a speed of 5.02×10⁶ m/s in a direction that makes an angle of 60.0° with the direction of a magnetic ficld
Triss [41]

The magnitude of the magnetic force on the proton is 1.25× 10—¹³ N.

Speed of the proton = 5.02 × 10 ⁶ m /a

Angel of between the velocity and the magnetic force = 60 °

The magnitude of magnetic field B = 0.180 T

The magnitude of the magnetic force on the proton is,

F = q(v \times B)

F = qvB \: sin \:  θ

F = 1.6 \times 10 ^{ - 19}  \times 5.02 \times 10 ^{6}  \times 0.180 \times  \: sin \: 60°

= 1.25 \times 10 ^{ - 13}  \: N

Therefore, the magnitude of the magnetic force on the proton is 1.25× 10—¹³ N.

To know more about magnetic force, refer to the below link:

brainly.com/question/23096032

#SPJ4

4 0
1 year ago
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