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3 years ago

5

What did both Newton and Einstein believe directly affects gravity? mass of objects distance between objects curvature of object

s acceleration of objects

1 answer:

timurjin [86]3 years ago

6 0

Answer:

mass of objects

Explanation:

hope it helps

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In the Niagara Falls hydroelectric generating plant, the energy of falling water is converted into electricity. The height of th

Charra [1.4K]

Answer:

1960.32306 kg/s

Explanation:

m = Mass of water = 1 kg

g = Acceleration due to gravity = 9.81 m/s²

h = Height from which the water will fall

Potential Energy

$PE=mgh\\\Rightarrow PE=1\times 9.81\times 52\\\Rightarrow PE=510.12\ J$

One megawatts of power is required

So, flow rate

$\dotm=\frac{P}{PE}\\\Rightarrow \dotm=\frac{1\times 10^6}{510.12}\\\Rightarrow \dotm=1960.32306\ kg/s$

1960.32306 kg/s is required to produce a megawatt of power

7 0

3 years ago

To test the quality of water sources in her area, Shameka collects five samples from each water source and tests the quality of

xenn [34]

The missing part of the incomplete question is given below:

Which important step of scientific design is Shameka conducting?

repetition

replication

verification of results

using controlled variables

Answer:

Verification of results

Explanation:

The way toward gathering five examples of water from various sources is conveyed to confirm the outcome. By gathering water from five distinct areas of a similar source the analyst can genuinely find out the nature of the water in her region of remain.

On the off chance that after examples are tried it is found the water isn't sound, the outcomes would be acknowledged as it has been appropriately checked and a proper move would be made.

Thus, the correct answer is - verification of results

6 0

3 years ago

A proton of mass mp is released from rest just above the lower plate and reaches the top plate with speed vp. An electron of mas

vodka [1.7K]

Answer:

$v_e=\sqrt{\frac{m_pv_p^2}{m_e}}$

Explanation:

You can consider that the force that acts over the proton is the same to the force over the electron. This is because the electric force is given by:

$F=qE$

$F_p=F_e$

where E is the constant electric field between the parallel plates, and is the same for both electron and proton. Also, the charge is the same.

by using the Newton second law for the proton, and by using kinematic equation for the calculation of the acceleration you can obtain:

$m_pa_p=qE\\\\a_p=\frac{v_p^2}{2d}\\\\\frac{m_pv_p^2}{2d}=qE$

(it has been used that vp^2 = v_o^2+2ad) where d is the separation of the plates, ap the acceleration of the proton, vp its velocity and mp its mass.

By doing the same for the electron you obtain:

$\frac{m_ev_e^2}{2d}=qE$

we can equals these expressions for both proton and electron, because the forces qE are the same:

$\frac{m_pv_p^2}{2d}=\frac{m_ev_e^2}{2d}\\\\v_e=\sqrt{\frac{m_pv_p^2}{m_e}}$

4 0

4 years ago

A railroad car of mass 2.52 104 kg is moving with a speed of 3.86 m/s. It collides and couples with three other coupled railroad

aleksley [76]

Answer:

a) v = 2.4125 m / s , b) Em_{f} / Em₀ = 0.89

Explanation:

a) This is an inelastic crash problem, the system is made up of the four carriages, so the forces during the crash are internal and the moment is conserved

Initial

p₀ = m v₁ + 3 m v₂

Final

$p_{f}$ = (4 m) v

p₀ =p_{f}

m (v₁ + 3 v₂) = 4 m v

v = (v₁ +3 v₂) / 4

Let's calculate

v = (3.86 + 3 1.93) / 4

v = 2.4125 m / s

b) the initial mechanical energy is

Em₀ = K₁ + 3 K₂

Em₀ = ½ m v₁² + ½ 3m v₂²

The final mechanical energy

$Em_{f}$ = K

Em_{f} = ½ 4 m v²

The fraction of energy lost is

Em_{f} / Em₀ = ½ 4m v² / ½ m (v₁² +3 v₂²)

Em_{f} / Em₀ = 4 v₂ / (v₁² + 3 v₂²)

Em_{f} / Em₀ = 4 2.4125² / (3.86² + 3 1.93²)

Em_{f} / em₀ = 23.28 / 26.07

Em_{f} / Em₀ = 0.89

6 0

4 years ago

What is the speed of a cyclist that rides west 88 km in 32 minutes?

suter [353]

Answer:

The speed of the cyclist is 2.75 km/min.

Explanation:

Given

The distance d = 88 km

Time t = 32 minutes

To determine

We need to find the speed of a cyclist.

In order to determine the speed of a cyclist, all we need to do is to divide the distance covered by a cyclist by the time taken to cover the distance.

Using the formula involving speed, time, and distance

$s=\frac{d}{t}$

where

s = speed

d = distance covered

t = time taken

substitute d = 88, and t = 32 in the formula

$s=\frac{d}{t}$

$s=\frac{88}{32}$

Cancel the common factor 8

$s=\frac{11}{4}$

$s=2.75$ km/min

Therefore, the speed of the cyclist is 2.75 km/min.

8 0

3 years ago