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never [62]
4 years ago
12

A certain unbalanced force gives a 5kg object an acceleration of 15 m/s2. What would be the acceleration if the same force was a

pplied to 30 kg object ?
Physics
1 answer:
stira [4]4 years ago
7 0

Answer:

a2 = 2.5 m/s2

Explanation:

F1 = m1 a1 We use the same force so F1 = F2

= 5kg × 15m/s2 F2 = m2 a2

= 75N a2 is required

a2 = F2 / m2

= 75N / 30 kg

= 2.5 m/s2

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A proton travels through a region of uniform magnetic field at an angle \thetaθ relative to the magnetic field. The magnitude of
MArishka [77]

Answer:

\theta=15.52^{\circ}

Explanation:

The magnitude of the force of a moving cahrge, in our case a proton, trought a magentic field is given by:

F=|q||vB|sin(\theta) (1)

where:

q is the proton charge (q=1.6*10^{-19} C)

v is the proton velocity (v=5*10^{5} m/s)

B is the magnetic field (B = 1.17 T)

Now, we just need to solve the equaton (1) for \theta.

\theta=sin^{-1}\left(\frac{F}{qvB}\right)

But the force F = ma, then:

m is the mass of proton  (m=1.67*10^{-27} kg)

a is the acceleration (a=1.5*10^{13} m/s^{2})

\theta=sin^{-1}\left(\frac{m_{p}a}{q_{p}vB}\right)

\theta=sin^{-1}\left(\frac{1.67*10^{-27}*1.5*10^{13}}{1.6*10^{-19}*5*10^{5}*1.17}\right)

\theta=15.52^{\circ}

I hope it helps you!

7 0
3 years ago
Which of the following statements about subatomic particles is FALSE? Which of the following statements about subatomic particle
kkurt [141]

Answer:

Protons have about the same mass as electrons is false

Explanation:

Electrons and protons have the same magnitude on charge but opposite sign

e^{-}=-1.6\times10^{-19}C: charge of electron

e^{+}=1.6\times10^{-19}C: charge of proton

Neutrons have no charge.

An atom is composed of protons and neutrons in the nucleus and electrons surrounding it, so a neutral atom has the same number of protons and electrons to has a net charge of zero. So, all the facts mentioned are true.

The false one is that protons have about the same mass as electrons, because the mass of an electron is 9.11\times10^{-31}kg and the mass of a proton is 1.67\times10^{-27}kg so the mass of a proton is a lot of bigger than electron mass.

8 0
3 years ago
11) A sled is initially given a shove up a frictionless 35º incline. It reaches a maximum height of 2.5
Andrej [43]

Answer:

7 m/s

Explanation:

To solve this problem you must use the conservation of energy.

K1 +U1=K2+U2

That math speak for, initial kinetic energy plus initial potential energy equals final kinetic energy plus final potential energy.

The initial PE (potential energy) is 0 because it hasn't been raised in the air yet. The final KE (kinetic energy) is 0 because it isn't moving. This gives the following:

KE1= \frac{1}{2}mv^{2}}

PE2=mgh

K1=U2

\frac{1}{2} mv^{2} =mgh

Solve for v

v=\sqrt{2gh}

Input known values and you get 7 m/s.

5 0
3 years ago
Which of the following is an example of a dry lubricant? oil grease graphite petroleum
Naddika [18.5K]

Answer:

Dry lubricants or solid lubricants are materials that, despite being in the solid phase, are able to reduce friction between two surfaces sliding against each other without the need for a liquid oil medium.

Explanation:

7 0
3 years ago
Read 2 more answers
Which of the following statements is true of electromagnetic waves but NOT mechanical waves.
Neko [114]

Answer:

a

Explanation:

what the heck is a medium

4 0
3 years ago
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