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
andreyandreev [35.5K]
3 years ago
8

Pls answer ASAP will mark brainiest

Physics
1 answer:
professor190 [17]3 years ago
3 0
First one is a
I’ll answer one by one
You might be interested in
A hockey puck is hit on a frozen lake and starts moving with a speed of 13.60 m/s. Exactly 6.2 s later, its speed is 7.20 m/s. (
stellarik [79]

Answer:

-1.03 m/s²

Explanation:

Acceleration: This can be defined as the rate of change of velocity. The S. I unit of acceleration is m/s².

Mathematically, acceleration is expressed as

a = (v-u)/t ........................ Equation 1

Where a = acceleration, v = final velocity, u = initial velocity, t  = time.

Given: u = 13.60 m/s, v = 7.20 m/s t = 6.2 s.

Substituting into equation 2

a = (7.20-13.60)/6.2

a = -6.4/6.2

a = -1.03 m/s²

Note: a is negative because, the hockey puck is decelerating.

Hence the average acceleration = -1.03 m/s²

3 0
2 years ago
What is the Coriolis effect? Explain how<br> this works
11Alexandr11 [23.1K]
An effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation. On the earth, the effect tends to deflect moving objects to the right in the northern hemisphere and to the left in the southern and is important in the formation of cyclonic weather systems.
6 0
3 years ago
When the distance between two masses is doubled, the gravitational attraction between
mrs_skeptik [129]

The new gravitational attraction will be 1/4 as much

Explanation:

The magnitude of the gravitational force between two objects is given by

F=G\frac{m_1 m_2}{r^2}

where

G=6.67\cdot 10^{-11} m^3 kg^{-1}s^{-2} is the gravitational constant

m1, m2 are the masses of the two objects

r is the separation between them

In this problem, the original force between the two objects is F, when they are separated by a distance r.

Later, the distance between the two objects is doubled, so the new distance is

r'=2r

Therefore, the new force will be

F'=G\frac{m_1 m_2}{(2r)^2}=\frac{1}{4}(\frac{Gm_1 m_2}{r^2})=\frac{F}{4}

Therefore, the new force will be one-fourth as much.

Learn more about gravitational force:

brainly.com/question/1724648

brainly.com/question/12785992

#LearnwithBrainly

5 0
3 years ago
What do you mean by velocity ratio of a wheel and axle​
IgorC [24]

Answer:

Explanation:

In wheel and axle. …with the system is the velocity ratio, or the ratio of the velocity (VF) with which the operator pulls the rope at F to the velocity at which the weight W is raised (VW). This ratio is equal to twice the radius of the large drum divided by the difference…

5 0
3 years ago
I need help with 23 please.
Ne4ueva [31]
The answer is c.

hope this helps! :)
8 0
3 years ago
Other questions:
  • The outer surface of a grill hood is at 87 °c and the emissivity is 0.93. the heat transfer coefficient for convection between t
    6·1 answer
  • A cylinder of mass mm is free to slide in a vertical tube. The kinetic friction force between the cylinder and the walls of the
    7·1 answer
  • Desert sand is very hot in the day and very cool at night. what does this indicate about its specific heat capacity?
    13·1 answer
  • Discuss the symmetry between the laws of Charles Coulomb and Sir Isaac Newton regarding forces
    14·2 answers
  • Bob can row 14 mph in still water. The total time to travel downstream and return upstream to the starting point is 4 hours. If
    13·1 answer
  • A 63.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to
    6·1 answer
  • An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a solenoid (
    6·2 answers
  • 4
    5·1 answer
  • You perform a double‑slit experiment in order to measure the wavelength of the new laser that you received for your birthday. Yo
    8·1 answer
  • A ball X of mals 1 kg travelling at 2 m/s has a
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!