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Pavel [41]
3 years ago
9

Can someone help me?​

Physics
1 answer:
shtirl [24]3 years ago
4 0
D is the answer the force excerted on the ball is greater than gravity
You might be interested in
Positive charge Q is placed on a conducting spherical shell with inner radius R1 and outer radius R2. The electric field at a po
gregori [183]

Answer:

E = 0    r <R₁

Explanation:

If we use Gauss's law

      Ф = ∫ E. dA = q_{int} / ε₀

in this case the charge is distributed throughout the spherical shell and as we are asked for the field for a radius smaller than the radius of the spherical shell, therefore, THERE ARE NO CHARGES INSIDE this surface.

Consequently by Gauss's law the electric field is ZERO

           E = 0    r <R₁

6 0
3 years ago
A car is traveling at a speed of 38.0 m/s on an interstate highway where the speed limit is 75.0 mi/h. Is the driver exceeding t
Tom [10]

Answer: Yes, he is exceeding the speed limit

Explanation:

Hi!

This is problem about unit conversion

1 mile = 1,609.344 m

Then the speed limit v is:

v = 75 mi/h = 120,700.8 m/h

1 hour = 60 min = 60*60 s = 3,600 s

v = (120,700.8/3,600) m/s = 33.52 m/s

38 m/s is higher than the speed limit v.

5 0
3 years ago
Which of the following snakes have venom that can be fatal to humans?
elena55 [62]

Answer:

It's D

Explanation:

Sorry if im wrong, correct me in comments and tell them actual answer if I'm wrong.

7 0
2 years ago
Read 2 more answers
he work function of a certain metal is 1.90 eV. What is the longest wavelength of light that can cause photoelectron emission fr
bixtya [17]

Answer:

6538.8 Angstrom

Explanation:

work function, w = 1.9 eV = 1.9 x 1.6 x 10^-19 J = 3.04 x 10^-19 J

Let the longest wavelength is λ.

W = h c / λ

λ = h c / W

λ = (6.626 x 10^-34 x 3 x 10^8) / (3.04 x 10^-19)

λ = 6.5388 x 10^-7 m = 6538.8 Angstrom

Thus, the longest wavelength is 6538.8 Angstrom.

3 0
3 years ago
Marcia ran at a speed of 3.50 meters per second. How fast was she running in kilometers per hour?
RUDIKE [14]
3.5 meters per second

60sec=1min
60min=1 hr

3.5*60*60= meters per hour
=12600

1000meter= 1 km

12600/1000= km per hr
=12.6 km per hour
4 0
3 years ago
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