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3 years ago

If bert the bat traveles eastward at 40 mph with a tail wind of 6 mph,what is his actual speed?

Physics

1 answer:

Liula [17]3 years ago

5 0

Bert would be going 34mph due to the taill winds being 6mph

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A 20 N south magnetic force pushes a charged particle traveling with a velocity of 4 m/s west through a 5 T magnetic field point

PtichkaEL [24]

Answer:

Charge of the particle is 1 coulomb.

Explanation:

Force, F:

${ \bf{F=BeV}}$

F is magnetic force.

B is the magnetic flux density.

e is the charge of the particle.

V is the velocity

${ \sf{20 = (5 \times e \times 4)}} \\ { \sf{20e = 20}} \\ { \sf{e = 1 \: coulomb}}$

8 0

3 years ago

Must new substance be formed when you observe property

d1i1m1o1n [39]

Of course not !
You can observe the color of a rose, measure the length of
your house, take the temperature of your hot chocolate, and
measure your own weight, without creating any new substances.

6 0

3 years ago

Enzymes speed up a biological reaction by

lord [1]

B) lowering the activation energy !
__________
hope it helps!

6 0

3 years ago

If we double only the amplitude of a vibrating ideal mass-and-spring system, the mechanical energy of the system:

Lelechka [254]

Answer:

D. increases by a factor of 4.

Explanation:

General equation of SHM

Lets taken the general equation of the displacement given as

x = A sinω t

A=Amplitude ,t=time ,ω=natural frequency

We know that speed V

$V=\dfrac{dx}{dt}$

V= A ω cosωt

The mechanical energy of spring mass system

$U=\dfrac{1}{2}KA^2$

K=Spring constant

Now when Amplitude A become 2 times then the mechanical energy will become 4 times.

Therefore the answer is D.

8 0

3 years ago

Why doesn't the north star move? i need the answer asap and i will give brainliest

3241004551 [841]

☁️ Answer ☁️

annyeonghaseyo!

The answer is:

Because it takes the Earth a full year to move from one end of its orbit to the other, and because that distance is so tiny compared to the distance to the star, and because the star is aligned with the Earth's axis of rotation, it doesn't appear to ever move. The north pole coincidentally points at this star.

Hope it helps.

Have a nice day noona/hyung!~ ￣▽￣❤️

3 0

3 years ago