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swat32
3 years ago
8

The efficiency of the first machine is 20.0 percent and the

Physics
1 answer:
Marina CMI [18]3 years ago
8 0

Answer:

most probably 5120J. or 32000x0.8= 25600J

Explanation:

the 1st machine has 20% efficiency. if we supply 32000 joules to the 1st machine then the work output is 32000x0.2 = 6400 J.

if this output from the 1st machine with an output of 6400J is passed through the second machine with an efficiency of 80% then we get 6400x.80 = 5120J.

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9) What will happen to the period of a pendulum if we change the rope of a pendulum with another which is four times with the in
Arturiano [62]

Double

Explanation:

Since the period T of a pendulum is given by

T = 2\pi \sqrt{\dfrac{l}{g}}

By increasing the length of the pendulum by 4, the period becomes

T' = 2\pi \sqrt{\dfrac{4l}{g}} = 2\left(2\pi \sqrt{\dfrac{l}{g}}\right) = 2T

You can see that the period doubles when we increase the length by a factor of 4.

5 0
3 years ago
If the potential is given by v = xy - 3z-2, then the electric field has a y-component of?
kiruha [24]

If the potential is given by v = xy - 3z-2, then the electric field has a y-component of X

When the charge is present in any form, a point in space has an electric field that is connected to it. The value of E, often known as the electric field strength, electric field intensity, or just the electric field, expresses the strength and direction of the electric field.

Each location in space where a charge exists in any form can be considered to have an electric field attached to it. The electric force per unit charge is another name for an electric field. The electric field's equation is given as E = F / Q. Volts per meter (V/m) is the electric field's SI unit. Newton's per coulomb unit is the same as this one.

To learn more about electric field please visit-brainly.com/question/15800304
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3 0
2 years ago
A bakery measured the mass of a whole cake as 0.870 kg. A customer bought one slice of the cake and measured the mass of the sli
Brrunno [24]

Answer:

0.7549kg

Explanation:

The mass of the slice + mass of the remaining cake = total mass of cake.

mass of remaining cake = total mass of cake - the mass of the slice

total mass=0.870kg

mass of slice = 0.1151kg

mass of remaining cake = 0.870 - 0.1151

mass of remaining cake=0.7549kg

6 0
4 years ago
The horizontal force exerted between the tires of a 500kg car and the ground is 980N. if the car starts from rest, how far will
Maksim231197 [3]

Answer:

Explanation:

d = ½at²

d = ½(F/m)t²

d = ½(980/500)5²

d = 24.5 m

6 0
2 years ago
Is electron positive
castortr0y [4]
No the electron is a negative.

The proton is the positive.

Hope this helps!
8 0
4 years ago
Read 2 more answers
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