1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Step2247 [10]
3 years ago
7

A ball is projected upward at time t = 0.0 s, from a point on a roof 60 m above the ground. The ball rises, then falls until it

strikes the ground. The initial velocity of the ball is At time what is the acceleration of the ball? Neglect air resistance.
Physics
1 answer:
musickatia [10]3 years ago
7 0
<span> y=y0 + vt +1/2gt^2
(solve for t here) cause you know y,y0,v,g
you will do quad formula here

then:
v=v0 +at solve for v
(remember the direction of the ball too (signs))

The main thing to remember here is that when the ball passes exactly (height) where it was launched it will travel the speed at which it was launched. *its almost like the ball was thrown in the downward direction. </span>
You might be interested in
Consider a thin walled hoop of uniform material. Two axis go through the center of the hoop. One axis is perpendicular to the pl
ratelena [41]

Answer:

Explanation:

Moment of Inertia about an axis passing through its center and Perpendicular to its Plane is given by

I_{zz}=Mr^2

As all the mass is at radius therefore its moment of inertia is more than the moment of inertia about a axis parallel to the Plane

According to perpendicular axis theorem

I_{zz}=I_{xx}+I_{yy}

and I_{xx}=I_{yy} is same due to symmetry

thus I_{xx}=\frac{1}{2}\times I_{zz}

I_{xx}=\frac{Mr^2}{2}

thus Perpendicular z axis will have more moment of inertia

                 

7 0
3 years ago
In a mercury barometer at atmospheric pressure, the height of the column of mercury in a glass tube is 760 mm. If another mercur
Archy [21]

Answer:

c. equal to 760 mm

Explanation:

We are told that another mercury barometer is used that has a tube of larger diameter. This means a larger area and the weight of the liquid in the tube will have increased since volume = area × height. Also, due to the larger area, the net upward force on the mercury will have also increased by the same amount because force = area × pressure. Therefore, as long as the pressure remains the same, the height of the mercury will also remain the same.

Thus the height of the mercury = 760 mm

7 0
3 years ago
Two identical conducting spheres are placed 80.0 cm apart. One is given a charge of 5.8 C and the other is given a charge of 6.4
Zepler [3.9K]

Answer: 5.214(10)^{11} N

Explanation:

According to <u>Coulomb's Law:</u>  

<em>"The electrostatic force F_{E} between two point charges q_{1} and q_{2} is proportional to the product of the charges and inversely proportional to the square of the distance d that separates them, and has the direction of the line that joins them".</em>

<em />

Mathematically this law is written as:

F_{E}=K\frac{q_{1}.q_{2}}{d^{2}}  

Where:

F_{E}  is the electrostatic force

K=8.99(10)^{9} Nm^{2}/C^{2} is the Coulomb's constant  

q_{1}=5.8 C and q_{2}=6.4 C are the electric charges

d=80 cm \frac{1 m}{100 cm}=0.8 m is the separation distance between the charges

Solving:

F_{E}=8.99(10)^{9} Nm^{2}/C^{2}\frac{(5.8 C)(6.4 C)}{(0.8 m)^{2}}  

F_{E}=5.214(10)^{11} N    

7 0
4 years ago
Calculate the wavelength when the frequency of 40,000 Hz travelling at 1450 m/s in fatty tissue.
dybincka [34]

Answer:

0.036m

Explanation:

Given parameters:

Frequency  = 40000Hz

Speed  = 1450m/s

Unknown:

Wavelength = ?

Solution:

To solve this problem, we use the wave velocity equation:

            V  = F ∧  

V is the velocity

F is the frequency

∧ is the wavelength

  Now insert the parameters and solve;

             1450  = 40000 x ∧

                 ∧ = 0.036m

4 0
3 years ago
John Purchased 6 Kg And 500 Kg of suger and 12kg and 400g of rice.what is the total mass of the suger and rice that he purchased
gulaghasi [49]

Answer:

Total Mass = 18 kg 900 gram

Explanation:

Given:

Mass of sugar buy = 6 kg 500 gram

Mass of rice buy = 12 kg 400 gram

Find:

Total Mass

Computation:

Total Mass = Mass of sugar buy + Mass of rice buy

Total Mass = 6 kg 500 gram + 12 kg 400 gram

Total Mass = 18 kg 900 gram

8 0
3 years ago
Other questions:
  • Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of -2.0 µC; sphere B carries a charge of -6.0 µC;
    6·1 answer
  • Which one of the following choices best represents a long-term benefit of Cardio respiratory fitness
    7·1 answer
  • A spring-loaded toy gun projects a 1305 g nerf pellet horizontally. The spring constant is 8.8 N/m, the barrel of the gun is 17
    9·1 answer
  • They dont move bc they dont have enough strenght in the roots to walk and they need soil to live.
    10·2 answers
  • A molecular motor moves along a microtubule track in steps of 100 Å displacements. The motor hydrolyzes one molecule of ATP per
    6·1 answer
  • a 2000 kg truck is traveling at a velocity of 30 m/s. What velocity must a 1000 kg car have in order to have the same momentum a
    5·1 answer
  • If 6 Chlorine atoms come out of a chemical reaction, how many must have entered into the reaction?
    12·2 answers
  • Forms of energy! Write a brief summary about each form of energy below.
    11·1 answer
  • ¿Qué cantidad de calor absorbió una masa de 4 g de cinc al pasar de 20 °C a<br> 180 °C?
    11·1 answer
  • At what speed does a 1,248 kg compact car have the same kinetic energy as a 18,777 kg truck going 26 km/h?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!